JP6524898B2 - INFORMATION PROCESSING APPARATUS, PROGRAM, BED, AND RADIATION IMAGING APPARATUS - Google Patents

Description

  The present invention relates to a bed on which an operator can manually move a top plate on which a subject is placed, and relates to each form of an information processing apparatus, a program, a bed, and a radiation imaging apparatus.

  FIG. 17 illustrates an example of a radiation imaging apparatus. The radiation imaging apparatus includes a bed 50 composed of a top 52 on which a subject is placed and a base 51 supporting the top 52, a radiation source 53 for radiation imaging, and a detector 54. The C-arm 55 is configured to support the radiation source 53 and the detector 54, and the support 57 is configured to support the C-arm 55.

  Such a radiation imaging apparatus is configured to be able to change the position of the subject relative to the C-arm 55. By moving the subject relative to the C-arm 55, which part of the subject is to be imaged can be changed. Such a change in the position of the subject is realized by the bed 50. That is, as shown in FIG. 18, the top 52 of the bed 50 can move relative to the base 51. The top 52 is moved by the operator standing by the top 52 manually. That is, a lever that an operator grasps as shown in FIG. 19 is attached to the side surface of the top plate 52, and the operator can apply a force to the top plate 52 using this lever as a clue. The operator can slide the top 52 horizontally as shown in FIG. 18 through this lever.

  The base 51 also supports the top 52 rotatably. That is, as shown in FIG. 20, the top plate 52 can be rotationally moved about an axis parallel to the body side direction of the subject. This rotational movement is realized not by the operator's manual operation but by a rotating device inside the base 51. An operation panel is provided beside the top plate 52, and the operator can control the rotation of the top plate 52 through the operation panel.

  If it is attempted to move the table 52 in the axial direction of the subject while the table 52 is inclined, the table 52 may slide down by itself, which is dangerous. Therefore, safety measures are taken on the bed 50 to prevent such a situation. That is, as shown in FIG. 21, the bed 50 is provided with an angle sensor that detects the tilt angle of the top 52. The angle sensor is provided on the rotation device of the top 52, and monitors the tilt angle of the top 52 from the rotation axis.

  When the table 52 in the horizontal state is rotated, the angle sensor detects that the table 52 has shifted from the horizontal state to the inclined state by this rotation. The bed 50 prohibits the movement of the top 52 in the body axis direction of the subject so that the top 52 does not slide down by itself when the top 52 is not horizontal. As a result, the top 52 is locked, and the top 52 does not move in the axial direction of the subject even if the operator applies a force to the lever. This lock is to prohibit the operator's manual movement, not lock for rotation. Even in the locked state, the operator can rotate the top 52 through the operation panel.

  As shown in FIG. 22, when the table 52 is rotated to the horizontal state, the angle sensor detects that the table 52 has shifted from the inclined state to the horizontal state by this rotation. At this time, the bed 50 receives support for unlocking the top 52 by the operator. When the operator gives an instruction for unlocking the top 52 through the operation panel in the state shown in FIG. 22, the top 52 is unlocked, and the operator manually moves the top 52 in the axial direction of the subject. Will be able to

  It has been known that this method has problems. That is, as shown in FIG. 23, the top 52 is bent due to the weight of the subject. Such a phenomenon is likely to occur when the weight of the subject is heavy. The deflection of the top 52 changes depending on the weight of the subject.

  When the top 52 is bent, the top 52 is slightly inclined. The angle sensor attached to the base 51 can not detect the deflection of the top plate 52. This is because the angle sensor only monitors the tilt angle of the top 52 from the rotation axis. Therefore, even if the top plate 52 is slightly inclined due to the deflection of the top plate 52, the angle sensor determines the inclination of the top plate 52 without considering the deflection of the top plate 52. When the operator gives an instruction for unlocking the top 52 while the angle sensor detects the level of the top 52, the top 52 may be unlocked while being slightly bent and bent. become. Then, the operator can move the top 52 in the axial direction of the subject manually.

  Such deflection of the top plate 52 is slight. Therefore, the top 52 does not slide off naturally at this degree of inclination. However, the inclination of the table 52 makes it difficult for the operator to perform the manual operation. As shown in FIG. 24, the inclined top plate 52 always exerts a force to slide down. This force is a force to move the top 52 to the right in FIG. In this state, when the operator who holds the lever of the table 52 tries to move the table 52 to the left, the force to slide down resists this. The surgeon feels the top 52 heavy enough.

  Therefore, in the conventional configuration, as shown in FIG. 25, an accelerometer is provided to detect deflection of the top plate 52. When the accelerometer detects the tilt of the top 52, the operator can not unlock the top 52. Only when the accelerometer detects the level of the table 52 as shown in FIG. 26, the operator can move the table 52 by hand. The deflection of the top 52 changes depending on the weight of the subject. Therefore, it can not be determined whether the top plate 52 is horizontal unless it is actually measured by an accelerometer (see, for example, Patent Document 1, Patent Document 2, Patent Document 3, Patent Document 4, and Patent Document 4).

JP, 2005-124615, A US Patent Publication 2009/144902 U.S. Patent Publication 2007/200396 U.S. Patent Publication No. 2011/296613

However, the conventional configuration has the following problems.
That is, in the conventional configuration, the visibility of radiation imaging is affected.

  The accelerometer needs to be provided on the top plate 52. Otherwise, the deflection of the top plate 52 can not be measured. Then, as shown in FIG. 27, the projection of the accelerometer is reflected in the radiation image obtained by radiation imaging. By providing the accelerometer, the visibility of the radiation image is deteriorated.

  This invention is made in view of such a situation, The objective is to provide the bed which does not affect the visibility of a radiographic image, ensuring the operativity of a top plate.

The present invention has the following configuration in order to solve the above-mentioned problems.
That is, the information processing apparatus according to the present invention mounts the subject and transmits the radiation at the time of imaging, and a base which supports the top plate movably in the body axis direction of the subject manually by the operator. , Input means for inputting instructions from the operator, a rotation mechanism for rotating the table top around the rotation axis, an inclination sensor for detecting the inclination of the table by monitoring the operation of the rotation mechanism, and control of the rotation mechanism In the information processing apparatus related to control of a bed on which a subject to be subjected to radiation imaging is placed, the apparatus includes a rotation control unit and a movement lock mechanism for locking the movement in the body axis direction. A) The top plate is configured to be rotated according to the instruction of rotation by the operator through the input means, and (B1) when the operator gives an instruction to execute correction through the input means, the inclination sensor Output means the level of the top plate Correction unit that corrects the relationship between the output of the tilt sensor and the tilt angle of the top plate, and (C) the tilt sensor detects the movement lock release of the operator through the input means, and the tilt sensor is the top plate In the case of outputting data meaning horizontal, it is characterized in that it comprises movement lock control means for releasing movement lock of the top plate.

[Operation and Effect] Three modes are shown in the present specification as specific methods for solving the above-mentioned problems. The first mode is a movement lock control means for releasing the movement lock of the tabletop even if the tabletop is not horizontal when the operator gives an instruction to adjust the detection of the inclination angle of the tabletop through the input means, and the operator When an instruction of correction execution is given through the input means, the correction means is provided with a correction means for correcting the output of the tilt sensor so that the top board at the designated time point is treated as horizontal.
According to this first mode, it is not necessary to actually measure the angle of how much the top plate tilts due to deflection, and it is not necessary to provide the top plate with an accelerometer. Since the deflection of the top changes depending on the weight of the subject, it can not be determined without actually measuring how much the top is inclined due to the deflection. In the conventional configuration, in view of this situation, the top plate is provided with an accelerometer, and the top plate is rotated to cancel the tilt of the top plate obtained by the measurement, thereby keeping the top plate in a horizontal state. According to the configuration of the present invention, the operator slides the top plate while changing the angle of the top plate, and registers a state in which the operator feels it is easy to slide the top plate as the horizontal state of the top plate. There is. As described above, if the operator can directly adjust the top plate to the horizontal state, it is no longer necessary for the device to know how the tilt angle of the top plate was due to bending. According to the present invention, it is possible to provide a bed in which the operator can easily slide the top plate manually by keeping the top plate horizontal without providing an accelerometer which interferes with radiation imaging on the top plate.

  In the information processing apparatus according to the present invention, a table on which the subject is placed and which transmits radiation at the time of imaging, and a base which supports the table so as to be movable in the body axial direction of the subject manually by the operator. , Input means for inputting instructions from the operator, a rotation mechanism for rotating the table top around the rotation axis, an inclination sensor for detecting the inclination of the table by monitoring the operation of the rotation mechanism, and control of the rotation mechanism In the information processing apparatus related to control of a bed on which a subject to be subjected to radiation imaging is placed, the apparatus includes a rotation control unit and a movement lock mechanism for locking the movement in the body axis direction. m) A deflection angle which is an angle indicating how much the top plate is inclined due to the deflection of the top plate, a position at which the subject is placed on the top plate, and a weight of the subject placed on the top plate Storage means for storing a table indicating the relevance of (B2) When the weight and position of the sample are input, the tilt angle corresponding to the position of the subject is read out from the storage means, and the top plate when the tilt sensor is detecting horizontal is rotated by a deflection angle in a direction against bending. There is a correction means for correcting the relationship between the output of the tilt sensor and the tilt angle of the top so that the new state being treated is treated as horizontal, and (C) there is an instruction to unlock the movement of the operator through the input means. When the tilt sensor outputs data indicating the level of the top board at the time of movement, the apparatus is characterized by comprising movement lock control means for releasing the movement lock of the top board.

[Operation and Effect] Three modes are shown in the present specification as specific methods for solving the above-mentioned problems. The second mode is a deflection angle that indicates how much the top plate is inclined due to the deflection of the top plate, a position at which the subject is placed on the top plate, and a subject placed on the top plate A table showing the relevance to the weight of the sample is stored, and when the weight of the subject is input, the tilt angle corresponding to the weight and position of the subject is read from the table, and the tilt sensor detects horizontal The output of the tilt sensor is corrected so that a new state in which the top plate of this time is rotated by a deflection angle in a direction that resists deflection is treated as horizontal.
Also in this second mode, it is not necessary to actually measure the angle of how much the top plate tilts due to deflection, and it is not necessary to provide the top plate with an accelerometer. Since the deflection of the top varies depending on the weight and position of the subject, it can not be determined without measuring how much the top is tilted due to the deflection. In the conventional configuration, in view of this situation, the top plate is provided with an accelerometer, and the top plate is rotated to cancel the tilt of the top plate obtained by the measurement, thereby keeping the top plate in a horizontal state. In the above-described configuration, attention is paid to the fact that the degree of deflection of the top is correlated with the weight of the subject placed on the top. The inventor of the present invention has realized that if the weight of the subject is known, it is possible to know how much the top plate is bent. At this time, it is not necessary to actually measure the degree of deflection of the top plate. According to the present invention, it is possible to provide a bed in which the operator can easily slide the top plate manually by keeping the top plate horizontal without providing an accelerometer which interferes with radiation imaging on the top plate.

  In the information processing apparatus according to the present invention, a table on which the subject is placed and which transmits radiation at the time of imaging, and a base which supports the table so as to be movable in the body axial direction of the subject manually by the operator. , Input means for inputting instructions from the operator, a rotation mechanism for rotating the table top around the rotation axis, an inclination sensor for detecting the inclination of the table by monitoring the operation of the rotation mechanism, and control of the rotation mechanism In the information processing apparatus related to control of a bed on which a subject to be subjected to radiation imaging is placed, the apparatus includes a rotation control unit and a movement lock mechanism for locking the movement in the body axis direction. B3) When the operator gives an instruction to execute correction through the input means, the new state in which the top plate when the tilt sensor is detecting horizontal is rotated by a predetermined angle in the direction against bending is treated as horizontal Inclination sensor output and top plate In the case where the tilt sensor outputs data indicating the level of the top when the correction means for correcting the relationship with the oblique angle and the movement lock release instruction of the operator via the (C) input means are instructed And moving lock control means for releasing the moving lock of the top plate.

[Operation and Effect] Three modes are shown in the present specification as specific methods for solving the above-mentioned problems. In the third mode, when the operator gives an instruction to execute correction through the input means, a new state in which the top plate when the tilt sensor is detecting horizontal is rotated by a predetermined angle in a direction against bending is considered. The output of the tilt sensor is corrected to be treated as horizontal.
According to this third mode, it is not necessary to actually measure the angle of how much the top plate tilts due to deflection, and it is not necessary to provide the top plate with an accelerometer. Since the deflection of the top changes depending on the weight of the subject, it can not be determined without actually measuring how much the top is inclined due to the deflection. In the conventional configuration, in view of this situation, the top plate is provided with an accelerometer, and the top plate is rotated to cancel the tilt of the top plate obtained by the measurement, thereby keeping the top plate in a horizontal state. However, such a conventional configuration does not recognize the problem regarding the reflection of the accelerometer described in FIG. In contrast to this, the above-described configuration roughly predicts the inclination due to the deflection of the top plate, and rotates the top plate to keep it horizontal as predicted. According to such a configuration, the accuracy when the top plate is kept horizontal is certainly inferior to measuring the inclination of the bent top plate. However, even so, the above-described configuration provides a great advantage of preventing the reflection of the accelerometer. According to the present invention, it is possible to provide a bed in which the operator can easily slide the top plate manually by keeping the top plate horizontal without providing an accelerometer which interferes with radiation imaging on the top plate.

  Further, in the above-described information processing apparatus, it is more preferable to include an initialization unit that brings the relationship between the corrected tilt sensor output and the tilt angle of the top into an initial state before the correction.

  [Operation and Effect] The above-described configuration more specifically represents the bed of the present invention. If the initialization means as described above is provided, correction of the relationship between the output of the tilt sensor and the tilt angle of the top can be invalidated each time imaging of the subject is completed, and an initial state can be established. The correction operation can be repeated for each subject.

  Further, in the bed according to the third mode described above, it is more preferable that the correction means operate using one selected from a plurality of predetermined angles by the operator through the input means.

  [Operation and Effect] The above-described configuration more specifically represents the bed of the present invention. According to the above-described configuration, the operator can adjust the angle involved in the correction, and can search for an inclination angle more suitable for the movement of the top.

  Further, in the above-described information processing apparatus, it is more preferable that the rotation control unit controls the rotation unit according to the output of the tilt sensor to make the top board horizontal.

  [Operation and Effect] The above-described configuration more specifically represents the bed of the present invention. According to the constitution of the sorcery, the caster can immediately set the top in a horizontal state.

  In the conventional configuration, the top plate is provided with an accelerometer, and the top plate is rotated to cancel the tilt of the top plate obtained by the measurement, and the top plate is kept horizontal. However, such a configuration causes a problem that the accelerometer is reflected in the radiographic image as shown in FIG. The present invention is configured to keep the top in a horizontal state without providing an accelerometer on the top. Accordingly, it is possible to provide a bed which can obtain a clear image without feeling heavy when manually moving the top plate.

FIG. 2 is a functional block diagram for explaining an entire configuration of a bed according to a first embodiment. It is a schematic diagram explaining the lock of the top plate which concerns on Example 1. FIG. It is a schematic diagram explaining the lock of the top plate which concerns on Example 1. FIG. FIG. 7 is a functional block diagram for explaining an operation relating to the release of the lock of the top according to the first embodiment. It is a schematic diagram explaining the bending of the top plate which concerns on Example 1. FIG. FIG. 6 is a flowchart illustrating a rough flow of horizontal reset according to Embodiment 1. FIG. FIG. 7 is a schematic view illustrating an angle adjustment operation according to the first embodiment. FIG. 6 is a functional block diagram for explaining a horizontal reset operation according to the first embodiment. FIG. 7 is a functional block diagram for explaining an operation related to the release of the lock of the top after angle adjustment according to the first embodiment. FIG. 7 is a schematic view for explaining the release of the lock of the top after the angle adjustment according to the first embodiment. It is a functional block diagram explaining holding of a lock of a top plate after angle adjustment concerning Example 1. FIG. It is a schematic diagram explaining holding | maintenance of the lock of a top plate after angle adjustment which concerns on Example 1. FIG. FIG. 7 is a schematic view illustrating an actual operation of the bed according to the first embodiment. It is a schematic diagram explaining 1 modification of this invention. It is a schematic diagram explaining 1 modification of this invention. It is a schematic diagram explaining 1 modification of this invention. It is a schematic diagram explaining the bed of conventional composition. It is a schematic diagram explaining the bed of conventional composition. It is a schematic diagram explaining the bed of conventional composition. It is a schematic diagram explaining the bed of conventional composition. It is a schematic diagram explaining the bed of conventional composition. It is a schematic diagram explaining the bed of conventional composition. It is a schematic diagram explaining the bed of conventional composition. It is a schematic diagram explaining the bed of conventional composition. It is a schematic diagram explaining the bed of conventional composition. It is a schematic diagram explaining the bed of conventional composition. It is a schematic diagram explaining the problem of the bed of conventional structure.

  Hereinafter, embodiments of the present invention will be described with reference to examples. The bed according to the present invention is a bed having a top on which a subject to be imaged in X-ray imaging is placed. In radiography, X-rays are directed toward a subject to detect X-rays transmitted through the subject. The X-rays at this time are transmitted not only through the subject but also through the top plate on which the subject is placed. Therefore, the top plate of the bed according to the present invention is assumed to be configured to pass X-rays at the time of X-ray imaging. An information processing apparatus according to the present invention is a control apparatus for a bed.

  As shown in FIG. 1, the bed according to the present invention has a base 1 installed on the floor of the examination room and a top 2 supported by the base 1. The top 2 is a structure on which the subject M is placed, and is a plate having an elongated shape in accordance with the shape of the subject M. The longitudinal direction of the top 2 corresponds to the body axial direction A of the subject M to be placed, and the short direction corresponds to the body side direction S of the subject M to be placed. The table-top 2 is configured to place the subject M and transmit X-rays at the time of imaging. When the subject M is to be photographed, the top 2 is also included in the image. Since the top 2 is designed to transmit X-rays, the top image on the image is not particularly noticeable on diagnosis.

  The table-top rotating mechanism 11 is a moving device incorporated in the base 1 and serves as a mechanism for rotating the table-top 2 with respect to the base 1 about a rotation axis parallel to the body side direction S shown in FIG. There is. According to the table-top rotating mechanism 11, if the table-top 2 can be rotated in one direction so that the right end of the table-top 2 in FIG. 1 rises, the table-top 2 is reversed so that the right end It can also be rotated in the direction. The top rotation control unit 12 is provided for the purpose of controlling the top rotation mechanism 11. The top rotation mechanism 11 corresponds to the rotation mechanism of the present invention, and the top rotation control unit 12 corresponds to the rotation control means of the present invention.

  A potentiometer 13 is attached to the top plate rotation mechanism 11. The potentiometer 13 monitors the operation of the top rotation mechanism 11 and outputs a signal indicating the tilt angle of the top 2. As a specific method of monitoring the operation of the top-plate rotation mechanism 11, for example, there is a method of measuring the amount of rotation of the rotation shaft of the top-plate rotation mechanism 11. The output of the potentiometer 13 is sent to the top-plate inclination-angle calculating unit 14. The top inclination angle calculation unit 14 calculates the inclination angle of the top 2 based on the output of the potentiometer 13. The potentiometer 13 corresponds to the tilt sensor of the present invention. The potentiometer 13 corresponds to an angle sensor.

  The operator can input an instruction to rotate the table 2 through the attached table console 2 a to the side of the table 2. The table-top rotation control unit 12 controls the table-top rotation mechanism 11 so as to rotate the table-top 2 by the rotation amount as instructed in the rotation direction as instructed by the operator through the table console 2a. When the operator operates the top-plate rotation button attached to the table console 2a, the top-plate rotation control unit 12 rotates the top 2 in the direction as instructed by the operator by the rotation amount as instructed by the operator. The top plate rotation mechanism 11 is controlled as follows. Thereby, the top 2 is rotated around the rotation axis described in FIG. The table console 2a corresponds to the input means of the present invention.

  When the table 2 is rotated, the table 2 may be parallel to the floor surface of the examination room. When horizontal, the potentiometer 13 outputs a signal representing this condition. Assuming that the signal output from the potentiometer 13 is, for example, a voltage signal, the output of the potentiometer 13 when the table 2 is horizontal is a specific voltage (100 mV in FIG. 1). When the top 2 in the horizontal state is rotated in one direction, the output voltage of the potentiometer 13 gradually decreases from 100 mV, for example. Further, when the table 2 in the horizontal state is rotated in the reverse direction, the output voltage of the potentiometer 13 gradually increases from 100 mV, for example. The output of the potentiometer 13 and the tilt angle of the top 2 can be correlated on a one-to-one basis, and the tilt angle of the top 2 when the output of the potentiometer 13 is 100 mV is 0 °.

  The table-top inclination-angle calculating unit 14 is configured to actually calculate the inclination angle of the table-top 2. The top-plate inclination-angle calculating unit 14 outputs a signal indicating that the inclination angle is 0 ° when the output voltage of the potentiometer 13 is 100 mV. When the output voltage of the potentiometer 13 is 90 mV, the top-plate inclination-angle calculating unit 14 outputs a signal indicating that the inclination angle is, for example, + 1 °. When the output voltage of the potentiometer 13 is 110 mV, the inclination angle is, for example, − It outputs a signal indicating that it is 1 °. When the inclination angle is 0 °, the output voltage of the potentiometer 13 will be referred to as a reference output. The tabletop inclination angle calculation unit 14 stores the setting value of the reference output, and the inclination angle of the tabletop 2 becomes 0 ° (horizontal) when the output voltage of the potentiometer 13 matches the setting value of the reference output Recognize that. The set value of the reference output is set by the serviceman who adjusts the apparatus placing a level on the top 2 and checking the levelness of the top 2. The table-top inclination angle calculation unit 14 is realized by software that controls the entire table 2. Therefore, although the configuration may be originally included in the main control unit 19, FIG. 1 is separately illustrated for understanding the present invention.

  The potentiometer 13 monitors the operation of the top-plate rotation mechanism 11 to output a signal indicating the tilt state of the top 2 to the top-plate tilt angle calculation unit 14. The top inclination angle calculation unit 14 calculates the inclination angle of the top 2 based on the signal output from the potentiometer 13.

  The table console 2a is provided with a lever 2a1 held by the operator. The operator can manually slide the table-top 2 in the body axial direction A with the lever 2a1 as a clue. However, the table-top 2 does not always slide as long as the operator operates the lever 2a1. This is because the top 2 rotates around the rotation axis as described with reference to FIG.

  If the top 2 can slide in a state where the top 2 is inclined, the top 2 slips down by itself, which is dangerous. The bed is provided with the table-top moving lock mechanism 15 assuming such a situation. When the table-top 2 is locked by the table-top movement lock mechanism 15, the operator can not manually move the table-top 2 in the body axis direction A. The tabletop movement lock control unit 16 is configured to control the tabletop movement lock mechanism 15, and is configured to instruct the tabletop movement lock mechanism 15 to lock and unlock the tabletop 2. In addition, the lock of the top 2 is a slide, and even in the locked state, rotation of the top 2 through the top rotation mechanism 11 is possible. The tabletop movement lock mechanism 15 corresponds to the movement lock mechanism of the present invention, and the tabletop movement lock control unit 16 corresponds to the movement lock control means of the present invention. The base 1 supports the top 2 movably in the body axial direction A of the subject M manually by the operator.

  In the configuration of the present invention, when the top 2 is rotated, the movement lock of the top 2 is locked. When the operator gives an instruction to rotate the top 2 while the movement lock of the top 2 is released, the top rotation control section 12 causes the top movement lock control section 16 to rotate the top 2 from this. Send out a signal indicating that The tabletop movement lock control unit 16 that has received the signal locks the movement lock of the tabletop 2 and transmits a signal indicating that the lock has been made to the tabletop movement lock control unit 16. After the reply of the signal, the table-top rotation control unit 12 executes the rotation of the table-top 2. When the operator rotates the top 2 by such an operation, the top 2 does not slide down. In addition, when the operator gives an instruction for the rotation of the top 2 while the movement lock of the top 2 is locked, the rotation of the top 2 is performed in a state where the locking of the movement lock is maintained.

  The tabletop movement lock mechanism 15 of the present invention locks the tabletop 2 with movement lock that prohibits movement in the body axis direction. Then, the table-top movement lock control unit 16 is configured to release the movement lock of the table-top 2 when the table-top 2 is horizontal in accordance with the instruction of the operator through the table console 2a. The tabletop movement lock control unit 16 determines whether the tabletop 2 is horizontal based on the output of the tabletop inclination angle calculation unit 14.

  The lever 2a1 attached to the table console 2a is provided with a lock release button that the operator presses when it is desired to unlock the top slide. The operator can move the stationary table 2 through this unlocking button. However, the operator does not necessarily press the lock release button in a state where the top 2 is horizontal. The bed is configured such that the lock can not be released unless the table 2 is in a horizontal state, assuming such a situation.

  FIG. 2 shows a case where the operator presses the lock release button when the table 2 is in the horizontal state. At this time, the table-top movement lock control unit 16 confirms that the table-top 2 is in the horizontal state, and releases the lock. As a result, the operator can move the top 2 manually in the axial direction A.

  FIG. 3 shows a case where the operator presses the lock release button when the table 2 is not in the horizontal state. At this time, since the table moving lock control unit 16 can not confirm that the table 2 is in the horizontal state, the table moving lock control unit 16 does not release the lock. Thereby, it is suppressed that the top 2 slips down alone.

  The tabletop movement lock control unit 16 recognizes the inclination angle of the tabletop 2 based on the output of the tabletop inclination angle calculation unit 14. 2 corresponds to the operation of the tabletop movement lock control unit 16 when the output of the tabletop inclination angle calculation unit 14 represents 0 °, and FIG. 3 corresponds to the output of the tabletop inclination angle calculation unit 14 It corresponds to the operation of the table-top movement lock control unit 16 when it represents something other than 0 °.

  FIG. 4 shows that the top 2 is unlocked. When the top 2 is horizontal, the potentiometer 13 outputs a voltage signal of 100 mV. Since 100 mV means that the tilt angle of the top 2 is 0 °, the top tilt angle calculator 14 moves the signal indicating that the tilt angle of the top 2 is 0 ° to the top It is sent to the lock control unit 16. When the operator presses the lock release button in this state, the tabletop movement lock control unit 16 gives the tabletop movement lock mechanism 15 an instruction to release the lock. Since the potentiometer 13 outputs a voltage signal of 100 mV, the operator can release the lock. When the table-top movement lock control unit 16 is instructed by the table console 2 a to release movement lock of the operator, when the potentiometer 13 outputs a voltage of 100 mV which means the level of the table-top 2, When the movement lock of the table-top 2 is released and the output voltage of the potentiometer 13 is not 100 mV, the movement lock is not released even if there is an instruction to release the movement lock of the operator.

  However, when the weight of the subject M placed on the top 2 is heavy, the top 2 is slightly bent. The deflection is a factor causing the top plate 2 to tilt. It has already been described in FIG. 24 that the inclination of the table 2 makes it difficult for the operator to slide the table 2 in the body axis direction A manually.

  The potentiometer 13 can not detect the inclination of the top 2 due to the deflection. FIG. 5 explains this point. The upper side of FIG. 5 shows a state in which the top 2 is horizontal without placing the subject M. Since the output of the potentiometer 13 at this time is 100 mV, the table-top movement lock control unit 16 receives the operator's instruction to release the lock, and the table-top 2 is unlocked.

  Then, a heavy subject M is placed on the top 2 in the upper state of FIG. Then, the top 2 is bent and the top 2 is slightly inclined as shown in the lower side of FIG. The potentiometer 13 monitors the operation of the top plate rotation mechanism 11. Even if the subject M is placed on the top 2, the top rotation mechanism 11 does not move at all, so the output of the potentiometer 13 remains at 100 mV. Then, the table-top movement lock control unit 16 receives an operator's instruction to release the lock. Eventually, the lock is released while the top 2 is inclined, and the phenomenon described in FIG. 24 occurs.

<Characteristic Configuration of the Present Invention>
The present invention has the following characteristic configuration in order to cope with such a phenomenon. That is, according to the present invention, when the operator feels that the movement of the table-top 2 is bad, the inclination of the table-top 2 can be restored. Moreover, unlike the conventional configuration, since it is not necessary to provide an accelerometer on the top plate 2, the accelerometer does not interfere with X-ray imaging.

  In FIG. 6, when the top plate 2 is unlocked while the top plate 2 is inclined due to bending, and the operator feels it difficult to move the top plate 2 manually, the operator can perform any operation. Represents the That is, the operator who recognizes that the top 2 is heavy can adjust the angle of the top 2. When the table 2 is moved easily after the angle adjustment, the setting of the table-top-tilt-angle calculating unit 14 that defines the level of the table-top 2 is changed, and the new table-top 2 is horizontally inclined. Can be redefined as Once this operation is performed, the caster does not feel any movement difficulty when sliding the table 2. The angle adjustment of the top 2 is performed by the operator actually trying to rotate the top 2 as shown in FIG. 7. When the table 2 is rotated, the movement lock of the table 2 is locked.

  The operator who recognizes that the table-top 2 is rotated and approaches horizontal presses the horizontal reset button provided on the table console 2a. Then, the definition of horizontal at the output of the potentiometer 13 is updated. FIG. 8 explains the operation at this time. When the operator presses the horizontal reset button, the signal generated at that time is output to the horizontal reset unit 17. The horizontal reset unit 17 sends a reset signal to the top-plate tilt-angle calculation unit 14 upon receiving an instruction on horizontal reset by the operator. When transmitting the reset signal, the table-top inclination-angle calculator 14 reads the current output value (current value) of the potentiometer and associates this with the horizontal state of the table 2. When the operator gives an instruction to execute correction through the table console 2a, the horizontal reset unit 17 tilts the output of the potentiometer 13 and the tilt of the top 2 so that the output voltage of the potentiometer 13 indicates the level of the top 2 It is a configuration that corrects the relationship with the angle, and corresponds to the correction means of the present invention. As an actual operation of the reset, the main control unit 19 overwrites data indicating the relationship between the output of the potentiometer 13 stored in the storage unit 20 and the tilt angle of the top 2. Therefore, although the reset unit 17 is originally configured to be included in the main control unit 19, it is depicted separately in FIG. 1 for understanding of the present invention.

  Therefore, when the horizontal reset button is pressed, the table-top-tilt-angle calculator 14 outputs a signal indicating that the output of the potentiometer 13 at that time indicates that the table-top 2 has a tilt angle of 0 °. become. The output voltage of the potentiometer 13 at this time is not limited to the initial value of 100 mV. In the case of FIG. 8, since the output voltage of the potentiometer 13 after the angle adjustment of the top 2 is 90 mV, the top tilt angle calculator 14 after the horizontal reset button is pressed has 90 mV output voltage of the top The set value of the voltage corresponding to the horizontal state of the top 2 is reset so as to indicate the level 2. Although the set value of the reference output stored in the storage unit 20 is 100 mV, the tabletop tilt angle calculation unit 14 does not follow this setting, and the 90 mV reflecting the adjustment result of the operator is the set value of the reference output Act as if it were The storage unit 20 corresponds to the storage unit of the present invention.

  When the set value (set value of the reference output) of the output voltage of the potentiometer 13 related to the top 2 in the horizontal state is corrected, the output voltage of the potentiometer 13 corresponding to the other inclination angles of the top 2 also changes. For example, when the output voltage of the potentiometer 13 is 100 mV, the top-plate tilt-angle calculator 14 outputs a signal indicating that the tilt angle is 0 ° before angle adjustment, but after the angle adjustment, the tilt angle is For example, it outputs a signal indicating that it is −1 °. When the output voltage of the potentiometer 13 is 80 mV, a signal indicating that the tilt angle is, for example, + 1 ° is output. The bed according to the present invention holds a function representing to what direction the top 2 inclines when the output voltage of the potentiometer 13 deviates from the set value of the reference output. If only the set value is corrected, the relationship between the tilt angle of the top 2 to the other output voltages is also corrected.

  In the configuration of the present invention, a safety measure can be taken in preparation for the case where the operator performs an erroneous operation. That is, when the operator presses the horizontal reset button, the output voltage of the potentiometer 13 does not fall within a predetermined range (for example, 80 mV to 120 mV) centered on the voltage (100 mV) corresponding to the tilt angle 0 °. The reset unit 17 may cause the table console 2a to display a warning indicating that the table 2 is too inclined without correcting the relationship between the output of the potentiometer 13 and the inclination angle of the table 2 . With this configuration, movement lock of the tabletop 2 is not released even if the operator erroneously presses the horizontal reset button with the tabletop 2 at a sharp angle. The deflection of the top 2 by the subject is not so large. Therefore, when the output voltage of the potentiometer 13 is not large from 100 mV, the top 2 is in a state of a steep angle far from the horizontal, and in this state, the movement lock of the top 2 is released, There is a possibility that the top 2 may slip out. If the above-mentioned safety measure is taken for the reset part 17, it can be set as a safer structure.

  In the above description, it seems as if the operator can correctly recognize that the top 2 has become horizontal by observing the top 2. In practice, it is difficult to visually determine whether the top 2 is horizontal. In the actual angle adjustment operation of the table 2, the operator rotates the table 2 through the table console 2 a, presses the horizontal reset button, releases the movement lock of the table 2, and manually slides the table 2. The four operations may be repeated until it is easy to move the table 2 sufficiently.

<Operation after angle adjustment>
FIG. 9 illustrates the release of the tabletop movement lock after the angle adjustment of the tabletop 2. The potentiometer 13 in the horizontal state of the top 2 newly defined by the operator outputs a voltage signal of 90 mV. Since 90 mV means that the tilt angle of the top 2 is 0 ° by adjustment of the operator, the top tilt angle calculator 14 has 0 ° of the tilt angle of the top 2 A signal indicating that is sent to the table-top movement lock control unit 16. When the operator presses the lock release button in this state, the tabletop movement lock control unit 16 gives the tabletop movement lock mechanism 15 an instruction to release the lock. Since the potentiometer 13 outputs a voltage signal of 90 mV, the operator can release the lock.

  FIG. 10 shows a case where the operator presses the unlocking button when the table 2 is in the horizontal state after the angle adjustment. At this time, the table-top movement lock control unit 16 confirms that the table-top 2 is in the horizontal state, and releases the lock. As a result, the operator can move the top 2 manually in the axial direction A.

  FIG. 11 explains the prohibition of top plate movement lock release after adjusting the angle of the top plate 2. The potentiometer 13 outputs a voltage signal of 100 mV in the state where the top 2 before the angle adjustment is horizontal. Since 100 mV means that the inclination angle of the top 2 is −1 ° by adjustment of the operator, the top inclination angle calculator 14 has the inclination angle of the top 2 of −1 °. And sends a signal indicating that it is to the table-top movement lock control unit 16. In this state, even if the operator presses the lock release button, the tabletop movement lock control unit 16 does not give the tabletop movement lock mechanism 15 an instruction to release the lock. Since the potentiometer 13 does not output a voltage signal of 90 mV, the lock is maintained.

  FIG. 12 shows a case where the operator presses the lock release button when the table 2 is not in the horizontal state after the angle adjustment. At this time, since the table moving lock control unit 16 can not confirm that the table 2 is in the horizontal state, the table moving lock control unit 16 does not release the lock. As a result, it is possible to prevent the tabletop 2 from sliding down by itself, and the operator does not feel any difficulty in movement when the tabletop 2 is slid.

<Actual behavior of the bed>
Finally, the operation of the bed according to the present invention will be described. When the operator completes the adjustment of the tilt angle of the table 2 and finishes the horizontal reset operation as shown in the first row of FIG. 13, as shown in the second row of FIG. The definition is changed. Since the top 2 is not rotated at the time of the second stage in FIG. 13, the potentiometer 13 outputs a voltage that means the level of the top 2. In this state, if the operator performs the operation, the top slide can be unlocked.

  When the operator instructs rotation of the top 2 through the table console 2a, the top 2 is rotated, and the top 2 is inclined as shown in the third step of FIG. When the tabletop 2 is rotated, the movement lock of the tabletop 2 is automatically locked. Then, at this time, it is assumed that the operator wants to return the top 2 horizontally. At such times, the bed is provided with convenient functions. That is, a table-top horizontal button is provided on the table console 2a. When the top horizontal button is pressed, the top 2 which is inclined is automatically rotated until it becomes horizontal, as shown in the fourth stage of FIG.

  In this automatic rotation of the table 2, the table rotation mechanism 11 is configured to rotate the table 2 until the table 2 becomes horizontal while the table rotation control unit 12 monitors the output of the table tilt angle calculation unit 14. Is realized by controlling the The horizontal position of the top 2 is defined as being in the first-stage state of FIG. 13, and therefore, the top 2 inclined as in the third stage of FIG. 13 is controlled by the top-plate rotation control unit 12. The top 2 is rotated until the first stage shown in FIG. 13 is reached. Therefore, the inclination of the top 2 in the fourth step in FIG. 13 is equal to the inclination of the top 2 in the first step. When the table-top horizontal button is pressed, the table-top 2 is rotated until the table-top 2 is reset to the horizontal state. The potentiometer 13 in the fourth stage state of FIG. 13 outputs a voltage that means the level of the top 2. In this state, if the operator performs the operation, the top slide can be unlocked. The tabletop rotation control unit 12 controls the tabletop rotation mechanism 11 according to the output of the potentiometer 13 to make the tabletop 2 in a horizontal state.

  The initialization unit 18 invalidates the correction of the association between the output of the potentiometer 13 and the tilt angle of the top 2 performed by the reset unit 17 after the end of imaging of the radiation of the subject, and initializes the association. It is a structure. The deflection of the top 2 changes depending on the weight of the subject. Therefore, even if the correction performed by the reset unit 17 has the effect of making the movement of the top 2 smooth when imaging the subject whose angle has been adjusted, the same effect can be obtained with another subject. It is not always possible. If the correction of the reset unit 17 is performed each time the photographing is performed, the movement of the top 2 can be surely performed smoothly. In view of such circumstances, the initialization unit 18 corrects the relationship between the output of the potentiometer 13 and the tilt angle of the top 2 by the reset unit 17 every time the object placed on the top 2 changes. It is designed to be refreshed to the state before it takes place. The initialization unit 18 sets the relationship between the corrected output of the potentiometer 13 and the tilt angle of the top to an initial state before correction. The initialization unit 18 may perform the initialization of the association when instructed by the operator to turn off the bed, or the association may be performed according to the instruction of the initialization through the table console 2a of the operator. Initialization may be performed. As an actual operation of the initialization, the main control unit 19 overwrites data indicating the relationship between the output of the potentiometer 13 stored in the storage unit 20 and the tilt angle of the top plate. Therefore, although the initialization unit 18 is originally configured to be included in the main control unit 19, FIG. 1 is separately illustrated for understanding the present invention.

  The main control unit 19 according to the present invention is realized by a CPU, and realizes various units 12, 16, 17, 18 by executing various programs. Each part may be divided and configured by an arithmetic processing unit in charge of these.

  As described above, according to the configuration of the present invention, when the operator gives an instruction for adjusting the tilt angle detection of the top 2 through the table console 2a, the movement lock of the top 2 is released even if the top 2 is not horizontal. When the operator gives an instruction for correction execution through the table console 2a, the output of the table-top-tilt-angle calculating unit 14 is corrected so that the table-top 2 at the time of instruction is treated as horizontal. A horizontal reset unit 17 is provided.

  According to the mode of the first embodiment, it is not necessary to actually measure the angle of how much the top 2 inclines due to the deflection, and it is not necessary to provide the top 2 with an accelerometer. Since the deflection of the top 2 changes depending on the weight of the subject M, it can not be determined without actually measuring how much the top 2 is inclined due to the deflection. In the conventional configuration, in view of this situation, the table 2 is provided with an accelerometer, and the table 2 is rotated to cancel the inclination of the table 2 obtained by the measurement, so that the table 2 becomes horizontal. I keep it. According to the configuration of the present invention, the operator slides the top 2 while changing the angle of the top 2 and registers the state in which the operator feels it is easy to slide the top 2 as the horizontal state of the top 2 It is a structure. As described above, if the operator can directly adjust the top 2 in a horizontal state, the apparatus does not need to know on the apparatus side what the tilt angle of the top 2 has been due to the deflection. According to the present invention, it is possible to provide a bed in which the operator can easily slide the table 2 manually by keeping the table 2 in the horizontal state without providing an accelerometer which interferes with radiation imaging on the table 2.

  Further, as described above, the table-top movement lock control unit 16 releases the movement lock only when the inclination of the table-top 2 is equal to or less than the predetermined amount regardless of the instruction of the operator. The lock can be prevented from being released in the inclined state, and there is no risk of the top 2 sliding down by itself.

  The present invention is not limited to the above-described configuration, and may be modified as follows.

  (1) In the configuration of the first embodiment, the operator actually tilts the top 2 to execute horizontal reset, but the present invention is not limited to this configuration. As shown in FIG. 14, a table may be stored in the storage unit 20 to indicate the association between the weight of the subject M and the correction value. This table shows the relationship between the deflection angle, which is an angle indicating how much the top 2 tilts due to the deflection of the top 2, and the weight of the subject M placed on the top 2. It can also be expressed as

  In the case of this modification, when the operator feels the slide of the table 2 heavy and presses the horizontal reset button attached to the table console 2a, the horizontal reset unit 17 determines the weight of the subject M from the X-ray imaging apparatus main body Request data about The X-ray imaging apparatus main body recognizes the weight of the subject M because the operator has input the weight of the subject M prior to the X-ray imaging. Therefore, the X-ray imaging apparatus can send information on the weight of the subject M to the horizontal reset unit 17 in response to the request. The horizontal reset unit 17 that recognizes the weight of the subject M reads out the correction value corresponding to the weight of the subject M from the storage unit 20, and adds the read correction value to the set value of the reference output to operate. The setting of the table-top inclination angle calculation unit 14 is reset.

  That is, when the weight of the subject M is input, the horizontal reset unit 17 of the present modification reads the tilt angle corresponding to the weight of the subject M from the storage unit 20, and the potentiometer 13 detects the horizontal. The relationship between the output of the potentiometer 13 and the tilt angle of the top 2 is corrected so that a new state in which the top 2 is rotated by the deflection angle in the direction against bending is treated as horizontal.

  In the case of this modification, assuming that the setting value of the reference output of the potentiometer 13 is 100 mV, the table-top-inclination-angle calculating unit 14 before pressing the horizontal reset button changes the inclination angle of the table 2 when the output of the potentiometer 13 becomes 100 mV. A signal indicating that it is 0 ° is sent to the table-top movement lock control unit 16. When the body M of the subject M is 70 kg, when the horizontal reset button is pressed, the output of the potentiometer 13 is 100 mV of 96 mV obtained by adding -4 mV read from the table to that of the top plate 2 A signal to the effect that the inclination angle is 0 ° is sent to the table-top movement lock control unit 16.

  The table showing the relationship between the weight of the subject M and the correction value is generated by actually sliding the table 2 described in the first embodiment. This table is generated by obtaining the output voltage of the potentiometer 13 at the time of completion of the horizontal reset for each weight while actually performing the horizontal reset described in FIGS. be able to.

  Also in this second mode, it is not necessary to actually measure the angle of how much the top 2 tilts due to deflection, and it is not necessary to provide the top 2 with an accelerometer. In the configuration of the present modification, attention is paid to the fact that the degree of deflection of the top 2 is correlated with the weight of the subject M placed on the top 2. The inventor of the present invention has noticed that if the weight of the subject M is known, it can be known how much the top 2 is bent. At this time, it is not necessary to actually measure the degree of deflection of the top 2. According to the present invention, it is possible to provide a bed in which the operator can easily slide the table 2 manually by keeping the table 2 in the horizontal state without providing an accelerometer which interferes with radiation imaging on the table 2.

  (2) The modification (1) described above focuses on the weight of the subject, but the modification can be performed by focusing on the position of the subject on the top 2. According to this modification, the storage unit 20 may be configured to store a table indicating the relationship between the position of the subject M and the weight and the correction value in the two rows of tabletops. This table relates the position and weight of the subject M placed on the top 2 to the deflection angle, which is an angle indicating how much the top 2 is inclined due to the deflection of the top 2. It can also be expressed as showing.

  In the case of this modification, when the operator feels the slide of the table 2 heavy and presses the horizontal reset button attached to the table console 2a, the horizontal reset unit 17 determines the position of the subject M from the X-ray imaging apparatus main body And request data on weight. The X-ray imaging apparatus main body recognizes the position and the weight of the subject M because the position of the subject M is input by the operator and the weight prior to the X-ray imaging. Therefore, the X-ray imaging apparatus can send information on the position of the subject M to the horizontal reset unit 17 according to the request. The horizontal reset unit 17 having recognized the position of the subject M reads out the correction value corresponding to the position of the subject M from the storage unit 20, and operates by adding only the read out correction value to the set value of the reference output. The setting of the table-top inclination angle calculation unit 14 is reset.

  (3) In the configuration of the first embodiment, the operator actually tilts the top 2 to execute horizontal reset, but the present invention is not limited to this configuration. When the horizontal reset button is pressed, the set value of the reference output may be changed by a predetermined amount. That is, as shown in the upper stage of FIG. 15, when the output voltage of the potentiometer 13 is specified as 100 mV when the table 2 is in the horizontal state, when the operator presses the horizontal reset button, the table 2 is in the horizontal state The output voltage of the potentiometer 13 is reset to 90 mV which is 100 mV lower than the initial state by 10 mV as shown in the middle of FIG. Assuming that the output voltage of the potentiometer 13 is 90 mV in this state, the lock related to the slide of the top 2 is released as shown in the lower part of FIG.

  That is, the horizontal reset unit 17 of the present modification, when the operator gives an instruction to execute correction through the table console 2a, has a predetermined angle in the direction to resist the bending of the top 2 when the potentiometer 13 is detecting horizontal. The relationship between the output of the potentiometer 13 and the tilt angle of the top 2 is corrected so that the rotated new state is treated as horizontal.

  According to the third mode, it is not necessary to actually measure the angle of how much the top 2 tilts due to deflection, and it is not necessary to provide the top 2 with an accelerometer. Since the deflection of the top 2 changes depending on the weight of the subject M, it can not be determined without actually measuring how much the top 2 is inclined due to the deflection. In the conventional configuration, in view of this situation, the table 2 is provided with an accelerometer, and the table 2 is rotated to cancel the inclination of the table 2 obtained by the measurement, so that the table 2 becomes horizontal. I keep it. However, such a configuration does not recognize the problem related to the reflection of the accelerometer described in FIG. The above-described configuration roughly predicts the inclination due to the deflection of the top 2 and rotates the top 2 to keep it horizontal as predicted. According to such a configuration, the accuracy when the top 2 is kept horizontal is certainly inferior to measuring the inclination of the top 2 which is bent. However, even so, the above-described configuration provides a great advantage of preventing the reflection of the accelerometer. According to the present invention, it is possible to provide a bed in which the operator can easily slide the table 2 manually by keeping the table 2 in the horizontal state without providing an accelerometer which interferes with radiation imaging on the table 2.

  (4) According to the above-described modification (3), there is no mention of adjustment of the predetermined angle, but as shown in FIG. 16, each time the horizontal reset button is pressed, the set value of the reference output is only the predetermined amount It may be configured to change. That is, while the output voltage of the potentiometer 13 when the table 2 is in the horizontal state is defined as 100 mV, when the operator presses the horizontal reset button once, the output of the potentiometer 13 when the table 2 is in the horizontal state The voltage is reset from the initial state of 100 mV to 98 mV lower by 2 mV. In this state, when the operator presses the horizontal reset button one more time, the output voltage of the potentiometer 13 when the top 2 is in the horizontal state is reset to 96 mV which is lower by 100 mV from the initial state by 4 mV. Thereafter, each time the operator presses the horizontal reset button, the output voltage of the potentiometer 13 when the top 2 is in the horizontal state decreases by a predetermined amount (2 mV). That is, in the present modification, the definition of the horizontal state of the top 2 can be changed in stages by the number of times the horizontal reset button is pressed. That is, the horizontal reset unit 17 of this modification operates using one selected from the plurality of predetermined angles through the table console 2a.

  According to the above-described configuration, the operator can adjust the angle involved in the correction, and can search for an inclination angle more suitable for the movement of the top 2.

  (5) The information processing apparatus according to the present invention is also realized by executing the following processing. That is, software (program) for realizing the functions of the above-described embodiments is supplied to a system or apparatus via a network or various storage media, and a computer (or CPU, MPU or the like) of the system or apparatus reads the program. It is a process to execute.

1 base 2 top board 2b operation panel (input means)
11 Top plate rotation mechanism (rotation mechanism)
13 Potentiometer (inclination sensor)
12 Top plate rotation control unit (rotation control means)
15 Top plate movement lock mechanism (movement lock mechanism)
16 Top plate movement lock control unit (movement lock control means)
17 Horizontal reset unit (correction means)
20 storage unit (storage means)

Claims (9)

A top plate on which an object is placed and radiation is transmitted at the time of imaging;
A base which movably supports the top plate in the axial direction of the subject by the operator's manual operation;
Input means for inputting an operator's instruction;
A rotation mechanism for rotating the top plate about a rotation axis;
An inclination sensor that detects the inclination of the top board by monitoring the operation of the rotation mechanism;
Rotation control means for controlling the rotation mechanism;
The information processing apparatus according to claim 1, further comprising: a moving lock mechanism that locks a movement lock that prohibits movement of the body axis direction on the top plate, and controlling a bed on which a subject to be subjected to radiation imaging is placed.
(A) The top plate is configured to be rotated in accordance with an instruction of rotation by the operator through the input means,
(B1) When the operator gives an instruction to execute correction through the input means, the output of the inclination sensor at the time of the correction execution instruction indicates the level of the top, and the inclination of the top and the inclination of the top indicate Correction means for correcting the relationship with the angle;
(C) When the tilt sensor outputs data indicating the level of the top when the movement lock release instruction of the operator is issued through the input means, the top lock is released. An information processing apparatus comprising movement lock control means. A top plate on which an object is placed and radiation is transmitted at the time of imaging;
A base which movably supports the top plate in the axial direction of the subject by the operator's manual operation;
Input means for inputting an operator's instruction;
A rotation mechanism for rotating the top plate about a rotation axis;
An inclination sensor that detects the inclination of the top board by monitoring the operation of the rotation mechanism;
Rotation control means for controlling the rotation mechanism;
The information processing apparatus according to claim 1, further comprising: a moving lock mechanism that locks a movement lock that prohibits movement of the body axis direction on the top plate, and controlling a bed on which a subject to be subjected to radiation imaging is placed.
(M) A deflection angle which is an angle indicating how much the top plate is inclined due to the deflection of the top plate, a position at which a subject is placed on the top plate, and a subject placed on the top plate Storage means for storing a table indicating the relationship with the weight of the sample;
(B2) When the weight and position of the subject are input, the tilt angle corresponding to the position of the subject is read out from the storage means, and the top plate is bent when the tilt sensor is detecting horizontal. Correction means for correcting the relationship between the output of the tilt sensor and the tilt angle of the top plate so that a new state rotated by a deflection angle in the resistance direction is treated as horizontal;
(C) When the tilt sensor outputs data indicating the level of the top when the movement lock release instruction of the operator is issued through the input means, the top lock is released. An information processing apparatus comprising movement lock control means. A top plate on which an object is placed and radiation is transmitted at the time of imaging;
A base which movably supports the top plate in the axial direction of the subject by the operator's manual operation;
Input means for inputting an operator's instruction;
A rotation mechanism for rotating the top plate about a rotation axis;
An inclination sensor that detects the inclination of the top board by monitoring the operation of the rotation mechanism;
Rotation control means for controlling the rotation mechanism;
The information processing apparatus according to claim 1, further comprising: a moving lock mechanism that locks a movement lock that prohibits movement of the body axis direction on the top plate, and controlling a bed on which a subject to be subjected to radiation imaging is placed.
(B3) When the operator gives an instruction to execute correction through the input means, a new state in which the top plate when the inclination sensor is detecting horizontal is rotated by a predetermined angle in a direction against bending is horizontal And correction means for correcting the relationship between the output of the tilt sensor and the tilt angle of the top plate so as to be treated as
(C) When the tilt sensor outputs data indicating the level of the top when the movement lock release instruction of the operator is issued through the input means, the top lock is released. An information processing apparatus comprising movement lock control means. In the information processing apparatus according to claim 3,
An information processing apparatus characterized in that the correction means operates using one selected from a plurality of predetermined angles by the operator through the input means. The information processing apparatus according to any one of claims 1 to 4.
An information processing apparatus comprising: initialization means for setting an association between the corrected output of the tilt sensor and the tilt angle of the top plate to an initial state before the correction. The information processing apparatus according to any one of claims 1 to 4.
An information processing apparatus characterized in that the rotation control means controls the rotation means according to the output of the tilt sensor to make the top board horizontal.   A program that causes a computer to function as each means of the information processing apparatus according to any one of claims 1 to 6.   A bed provided with the information processing apparatus according to any one of claims 1 to 6. A radiation imaging apparatus comprising the information processing apparatus according to any one of claims 1 to 6.

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