WO2007091295A1

WO2007091295A1 - X-ray photography system

Info

Publication number: WO2007091295A1
Application number: PCT/JP2006/301997
Authority: WO
Inventors: Katsuhiro Masuo; Mitsuru Umeda; Daisuke Murakami
Original assignee: Shimadzu Corporation
Priority date: 2006-02-06
Filing date: 2006-02-06
Publication date: 2007-08-16
Also published as: CN101325910B; CN101325910A; JP5034954B2; JPWO2007091295A1

Abstract

[PROBLEMS] To provide an X-ray photography system in which the operating state or positional relation of a video system supporting means can be obtained intuitively in a series of inspections employing memory switches and operability of the memory switch is enhanced. [MEANS FOR SOLVING PROBLEMS] When any one of a plurality of memory switches (30a-30i) arranged in association with respective rotational directions and rotational angles and specifying the memory areas of a target rotational information storage means (40) corresponding to these directions and angles is operated, target rotational information corresponding to that memory switch is read out from the target rotational information storage means (40) and rotation of a C arm is controlled such that actual rotational information coincides with the target rotational information. During rotation control or when the actual rotational information coincides with the target rotational information, an indication light corresponding to the operated memory switch (any one of 31a-31i) is lighted.

Description

Specification

X-ray equipment

Technical field

[0001] The present invention performs X-ray imaging from multiple directions by rotating an X-ray tube and an X-ray detector in opposition to each other and rotating around the body axis of the subject. Background art about X-ray imaging equipment

[0002] As a conventional X-ray imaging apparatus of this type, for example, a C-shaped arm that supports and supports an X-ray tube and an X-ray image intensifier, and a C-shaped arm around a subject lying on a bed. A position detection unit that detects actual rotation information of the rotation direction (the body axis direction of the subject and around the body axis) and the rotation angle, and a target rotation direction of the C-arm. The C-arm is rotated so that the input unit for inputting the target rotation information with the rotation angle matches the input target rotation information with the actual rotation information from the position detection unit. There is an X-ray imaging device equipped with a rotation control unit to control.

[0003] The input unit for inputting the target rotation information includes a rotation direction key for instructing the rotation direction, an angle setting key for setting the rotation angle, and a plurality of the set keys. A plurality of memory switches for storing target rotation information and a storage execution key for executing storage of target rotation information in the memory switch are provided. The plurality of memory switches are configured so that one of a plurality of memory switches can be selected by sequentially changing the numerical value in an up-down manner or by directly specifying the numerical value with a numeric key. .

In the X-ray imaging apparatus configured as described above, as shown in FIG. 6, the multidirectional rotation directions of the C-arm are expressed as follows. The C-arm is rotated around the body axis of the subject (around the body axis), and the direction of rotation to the left when viewed from the head side of the subject is “LAO” (left forward tilted) ), And the direction of rotation to the right is represented as “RAO” (right forward tilt). In addition, it is a state of being rotated along the body axis of the subject (body axis direction), and the direction of rotation of the subject toward the head side is represented as “CRAN” (CRANIAL). Rotate to “CAU D ”(CAUDAL).

In this X-ray imaging apparatus, first, target rotation information is stored in advance as follows before imaging.

First, the rotation direction (LAO, RAO, CRAN, CAUD) is specified by the rotation direction key, and the rotation angle is specified by the angle setting key. Then, by designating the memory switch number and pressing the storage execution key, the target rotation information including the rotation direction and the rotation angle is stored in the memory switch of the specified number. Next, the number of the memory switch is sequentially changed and the same operation is performed to set a plurality of target rotation information in the memory switch.

[0006] At the time of shooting, the photographer designates the number of the memory switch that stores the desired target rotation information. Then, the target rotation information stored in the memory switch with this number is output to the rotation control unit. The rotation control unit to which the target rotation information is input controls the rotation of the C-arm so that the actual rotation information from the position detection unit matches the target rotation information. When the actual rotation information and the target rotation information match, the X-ray tube force X-rays are exposed and an X-ray image is obtained from the X-ray image intensifier. Next! Therefore, the desired number of memory switches are instructed sequentially, and photographing from multiple directions is sequentially performed.

[0007] By the way, in cardiovascular angiography examination using an X-ray imaging apparatus, a contrast medium is injected into a subject, and imaging from nine directions shown below is generally performed in many cases.

[0008] That is, the rotation direction is the body axis direction, and each rotation angle is 30 ° on the head side (CRAN), 30 ° on the vertical direction (0 °), and 30 ° on the foot side (CAUD). The rotation direction is around the body axis and the left side (LAO)

Shooting in the direction represented by a total of nine pieces of rotation information, with a rotation angle of 30 ° in the vertical direction (0 °) and a rotation angle of 30 ° in the right side (RAO), is particularly frequent.

FIG. 7 shows a simplified conventional X-ray imaging apparatus (Patent Document 1). The C-arm 1 that supports the X-ray tube 2 and the X-ray detector 3 facing each other rotates and moves around the subject M by the drive motor M3, and the drive motor Ml and the drive motor M2 It is configured to rotate about and around the body axis.

[0010] The operation panel 20 includes a plurality of switches, and is used for instructing each rotation direction and rotation angle of the C-arm 1. The operation panel 20 has a desired rotation direction and rotation angle. It also has a function for inputting the target rotation information. The CPU 21 inputs the target rotation information from the operation panel 20, and controls the rotation direction and rotation angle (actual rotation information corresponding to the rotation direction and rotation angle) of the drive motor M1 and the drive motor M2. The actual rotation information is controlled so as to match the target rotation information. MD1 and MD2 are motor drive circuits that rotate the drive motors Ml and M2 in response to a command signal from the CPU 21, and MD3 is a motor that rotates and drives the drive motor M3 in response to an operation signal from the operation panel 20. It is a drive circuit. The CPU 21 obtains actual rotation information from the rotary encoders R1 to R3, and performs movement control of the motor drive circuit so that the C-arm 1 matches the target rotation information.

[0011] The display panel 22 displays the rotation direction (CRAN, CAUD, LAO, RAO) and rotation angle of the drive motor Ml and the drive motor M2, which are actual rotation information, and is stored in a memory switch described later. The target rotation information is displayed and the information is displayed to the photographer. While the CPU 21 performs control so that the actual rotation information matches the target rotation information, the display control unit 23 blinks and displays the rotation direction and rotation angle, or when both the information match. This is for controlling the display panel 22 such that the blinking of the turning direction and the turning angle is stopped and the lamp is turned on.

[0012] When the photographer inputs the target rotation information via the operation panel 20, the force addition operation panel 30 has a function for storing and recalling the target rotation information. The additional operation panel 30 stores the target rotation information input via the nine memory switches 30a to 30i and the operation panel 20 in the target rotation information memory or when the memory switches 30a to 30i are pressed. A SET switch 30j for instructing the CPU 21 to start the rotation control is provided so that the target rotation information corresponding to this matches the actual rotation information.

Each of the memory switches 30a to 30i is disposed at a position on the additional operation panel 30 that is associated with a rotation direction and a rotation angle of the subject M in plan view. That is, the memory switch 30a is disposed at a position indicating the CRAN and LAO directions, the memory switch 30b is disposed at a position indicating only the CRAN direction, and the memory switch 30c is disposed at a position indicating the CRAN and RAO directions. Has been. Further, the memory switch 30d is disposed at a position indicating only the LAO direction, and the memory switch 30e is disposed at a position indicating that the rotation angle is 0 ° with respect to any rotation direction. 30f is a position that indicates only the RAO direction. It is arranged in the place. Similarly, the memory switches 30g, 30h, and 30i are arranged at positions indicating the CAUD and LAO directions, the CAUD direction, and the CAUD and RAO directions, respectively.

The target rotation information memory 40 stores target rotation information corresponding to the memory switches 30a to 30i of the additional operation panel 30. When the target rotation information is input from the operation panel 20 and one of the memory switches 30a to 30i is pressed, the setting memory switch (not shown) on the operation panel 20 is pressed. This is done by storing the target rotation information at the corresponding address. FIG. 8 shows a state in which the target rotation information is stored in the target rotation information memory 40 corresponding to each memory switch.

Patent Document 1: Japanese Patent Laid-Open No. 08-150137

Disclosure of the invention

Problems to be solved by the invention

[0016] In the conventional X-ray imaging apparatus that works, the operation state of the apparatus is shown on the display panel 22. That is, in manual operation that does not use a memory switch, for the C-type arm 1, the rotation angle in the LAO direction and the RAO direction is displayed on the display unit 22e, and the CRAN direction is displayed on the display unit 22f.

The rotation angle in the UD direction is displayed for each.

[0017] When the memory switches 30a to 30g are used for operation, pressing the memory switch indicates the LAO direction, RAO direction, CRAN direction, and CAUD direction corresponding to the stored rotation information. The indicator lights 22a to 22d are turned on, and the rotation angles corresponding to the stored rotation information are displayed on the display units 22e and 22f.

For example, if the memory switch 30a is pressed, the indicator lights 22a and 22c indicating the LAO direction and the CRAN direction are turned on based on the target rotation information stored in the target rotation information memory 40 shown in FIG. Here, 30 ° is displayed on each of the display portions 22e and 22f.

[0018] Then, by pressing the SET switch 30j, the CPU 21 controls the C-arm 1 until it reaches the destination based on the target rotation information based on the rotation information stored in the selected memory switch. In this case, the display units 22e and 22f are switched to the actual rotation angle display based on the actual angle information obtained via the rotary encoders Rl and R2. [0019] Here, in the status display on the display panel 22, only the angle information is displayed. Therefore, after any of the nine memory switches 30a to 30i is operated, the C-arm 1 is set to which position. There is a problem that the force reached is difficult to understand intuitively. In particular, the function to control the actual rotation information using the powerful memory switch so that it matches the target rotation information is often used as a routine work in clinical examinations, so operability is expected to improve.

[0020] In addition, because the memory switch 30a to 30g is sequentially operated to complete a series of routines, the operator knows that during the inspection, just before and / or when the misaligned memory switch is selected! / In some cases, it may not be possible to do so, and it may be difficult to determine which memory switch to press next.

[0021] Therefore, in the present invention, in a series of inspections using the memory switch, it is intuitive to determine which position the C-arm 1 moves to! /, And which position it has reached. The purpose is to provide an X-ray imaging device that can be easily grasped. It is another object of the present invention to provide an X-ray imaging apparatus that can easily grasp only the selection of a misaligned memory switch immediately before the memory switches 30a to 30g are sequentially operated.

Means for solving the problem

The X-ray imaging apparatus of the present invention is an X-ray imaging apparatus that performs X-ray imaging from multiple directions of a subject, supports an X-ray tube and an X-ray detector facing each other, and lies on a bed. The support means that can rotate in the body axis direction and around the body axis (hereinafter referred to as the rotation direction) of the subject, and the position of the support means around the subject, Position detection means for detecting actual rotation information, a plurality of memory switches respectively arranged in association with the rotation direction,

Corresponding to each of the memory switches, objective rotation information storage means for storing target rotation information of a target rotation direction and rotation angle of the support means, and corresponding to the memory switches, respectively. And when the memory switch is operated, the target rotation information corresponding to the memory switch is read from the target rotation information storage means, and the actual rotation information from the position detection means The rotation control means for controlling the rotation of the support means so as to coincide with the read target rotation information, while the rotation control is being performed, or between the actual rotation information and the target rotation information. -If the memory Display control means for driving the indicator lamps corresponding to the tabs.

[0023] The display control means changes the lighting state of the indicator lamp when the actual rotation information from the position detection means matches the target rotation information.

[0024] Further, while the rotation control is being performed, the display control means performs drive control so that the indicator lamp corresponding to the operated memory switch blinks or lights up, and the display control means performs the actual operation from the position detection means. When the rotation information and the target rotation information match, it is controlled to turn on or blink the indicator lamp.

In the X-ray imaging apparatus of the present invention, whether or not the display control means drives the indicator lamp when the actual rotation information and the target rotation information from the position detection means match. Further, drive selection means for enabling selection is further provided.

The X-ray imaging apparatus of the present invention further includes an input means for inputting the target rotation information, and the target rotation information storage in which the input target rotation information is associated with each of the memory switches. Operating means for storing in the means.

[0027] The display control means drives an indicator lamp corresponding to a memory switch related to the target rotation information input from the input means.

[0028] When the memory switch corresponding to the driven indicator lamp is operated, the display control means changes the driving state.

[0029] Only when the memory switch corresponding to the driven indicator lamp is operated, a read control means for allowing storage in the target rotation information storage means is provided.

[0030] Further, the present invention is an operation method of an X-ray imaging apparatus for performing X-ray imaging from multiple directions of a subject, and supports an X-ray tube and an X-ray detector facing each other, Misalignment of a plurality of memory switches respectively associated with the rotation direction of the support means that can rotate in the body axis direction and around the body axis (hereinafter referred to as the rotation direction) of the subject lying on the bed From the target rotation information storage means which stores the actual rotation information of the rotation direction and the rotation angle of the support means in advance corresponding to the memory switch to the operated memory switch. The step of reading the corresponding target rotation information and the rotation of the support means so that the actual rotation information from the position detection means for detecting the actual rotation information of the support means matches the read target rotation information. Controlling the memory switch Each pair The indicator lamp corresponding to the operated memory switch when the rotation control is performed or when the actual rotation information and the target rotation information coincide with each other. And a step of driving.

The invention's effect

[0031] In the X-ray imaging apparatus of the present invention, an indicator lamp is arranged corresponding to each of a plurality of memory switches arranged in association with the rotation direction and the rotation angle, and the display control means attaches the memory lamp to the memory switch. The display corresponding to the memory switch while the rotation control is performed based on the stored rotation information or when the actual rotation information and the target rotation information are inconsistent (arrival at the destination). Since it is configured to drive the lamp, it is possible to easily grasp which memory switch the operation state of the C-arm is based on, and the memory switch to be operated next.

The X-ray imaging apparatus of the present invention changes the lighting state of the indicator lamp when the actual rotation information and the target rotation information from the position detection unit coincide with each other by the display control unit. With this configuration, it is possible to intuitively understand the operating state and destination arrival state of the C-arm.

[0033] While the rotation control is being performed, drive control is performed so that the indicator lamp corresponding to the operated memory switch blinks or lights up, and the actual rotation information and the target rotation from the position detection unit are controlled. When the information is inconsistent, the indicator light is controlled to turn on or blink, so that the C-arm is in operation and it is possible to grasp more intuitively that the destination has been reached. Is possible.

[0034] The X-ray imaging apparatus of the present invention includes an input unit that inputs target rotation information of a target rotation direction and rotation angle of the support unit, and the input target rotation information. Operation means for storing in the storage area of the target rotation information storage means corresponding to each of the memory switches related to the rotation direction and rotation angle, so that the target rotation information to the target rotation information storage means is provided. Work to store dynamic information can be easily performed.

In the X-ray imaging apparatus of the present invention, the display control unit is configured to drive the indicator lamp corresponding to the memory switch related to the target rotation information input from the input unit. It becomes possible to reliably grasp the memory switch in which information is to be stored. [0036] In the X-ray imaging apparatus of the present invention, when the memory switch corresponding to the driven indicator lamp is operated by the display control means, even after the memory switch is selected in order to change the driving state. In addition, it becomes possible to grasp in which memory switch the rotation information is to be stored prior to the actual storage operation.

[0037] The X-ray imaging apparatus of the present invention enables storage in the target rotation information storage means only when a display-driven memory switch is selected. It is possible to reliably prevent the target rotation information from being stored.

Brief Description of Drawings

FIG. 1 is a perspective view showing a schematic configuration of an X-ray imaging apparatus according to an embodiment.

FIG. 2 is a partially broken plan view showing a rotating mechanism of a C-arm.

FIG. 3 is a schematic block diagram showing a control system of the X-ray imaging apparatus.

FIG. 4 is a flowchart showing a target rotation information setting process.

FIG. 5 is a flowchart showing an X-ray imaging process.

FIG. 6 is a schematic diagram showing the relationship between the rotation direction and the rotation angle.

FIG. 7 is a schematic block diagram showing a control system of an X-ray imaging apparatus of a conventional apparatus.

FIG. 8 is a schematic diagram showing the contents of a target rotation information memory.

Explanation of symbols

[0039] 1 ... C-arm 2 ... X-ray tube 3 ... X-ray image intensifier 20

... Control panel 22 ... Display panel 30 ... Additional control panel 30a-30i ... Memory switch 30j ...

SET switch M ... Subject M1-M3 ... Motor R1-R3

... Mouth ■ Tariko Niko ■ ~ ~ Da Best mode for carrying out the invention

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a schematic configuration of an X-ray imaging apparatus according to this embodiment.

[0041] In the figure, the C-arm 1 that can move around the subject M is arranged in a space surrounding the subject M in a state of being suspended from the ceiling wall so as to sandwich the subject M. . An X-ray tube 2 and an X-ray detector 3 are oppositely supported at both ends of the C-arm 1. The C-arm 1 can be rotated in the body axis direction of the subject M and in the direction around the body axis (rotation direction). Is configured to rotate around the space around the subject M.

Next, the rotation mechanism will be described with reference to a partially broken plan view of the C-arm 1 shown in FIG. First, rotation of the C-arm 1 (support means) in the body axis direction of the subject M (the head side of the subject M: CRAN, the foot side of the subject M: rotation in the CAUD direction) This is realized by the drive mechanism in the arm holder 4 that holds the arm 1. In the arm holder 4, a part of a belt (or chain) 5, which has both ends fixed to the C-arm 1, is housed, and this belt 5 is stretched around a driving roller 6. A rotary encoder R1 corresponding to position detecting means for detecting the rotation direction and the rotation amount of the drive motor Ml for rotating the drive roller 6 is provided in the arm holder 4 (however, in the drawing, the arm holder is not shown). Shown outside 4). The C-arm 1 is rotated in the body axis direction of the subject M through the belt 5 by the rotating action of the drive motor Ml. Reference numeral 7 denotes a guide roller for guiding the drive roller 6 that drives the belt 5.

[0043] The rotation of the C-arm 1 around the body axis of the subject M (rotation direction LAO to the left when viewed from the head side of the subject M, rotation direction RAO to the right, which is the opposite direction) is This is realized by rotating the arm holder 4 around the body axis of the subject M. The base of the arm holder 4 (the opposite end holding the C-arm 1) is rotatably supported by the side surface of the telescopic arm 8, and the gear 9 is located near the support surface. It is fixed. The gear 9 is meshed with the pion gear 10, and the pion gear 10 is attached to the output shaft of the drive motor M 2 provided in the telescopic arm 8. The C-arm 1 rotates around the body axis of the subject M together with the arm holder 4 by the rotating action of the drive motor M2. The rotary encoder R2 corresponds to position detecting means for detecting the rotation direction and the rotation amount of the drive motor M2.

The extendable arm 8 described above extends and contracts vertically along a direction orthogonal to the body axis of the subject M, and is held at the lower end of the L-shaped rotation arm 11. The other end of the rotary arm 11 is fixed to a rotary body 12, and the rotary body 12 is based on a rotary base 13 fixed to the ceiling wall of the examination room where the X-ray imaging apparatus is installed. Rotate. The rotating body 12 is rotated by the drive motor M3, and the rotary encoder R3 detects the rotation direction and the rotation amount of the rotating body 12, thereby detecting the position of the C-arm 1 in the space around the subject M. Is detected. A control system for controlling each rotation is configured as shown in FIG. Here, the same components as those in the control system shown in FIG.

In the present invention, in each memory switch 30a to 30i of the additional operation panel 30 for storing the rotation information, the indicator lights 31a to 31i are provided in the target rotation information memory 40 as an integral unit with the switch. In addition, in the SET switch 30j for instructing the operation of the C-arm 1, based on the rotation information selected by the memory switches 30a to 30i, the indicator lamp 31j is also provided as an integral type with the memory switch. Being

[0047] These indicator lights 31a to 31j are controlled to be turned on by the CPU 21 via the display control unit 24. In this embodiment, the indicator lamps 31a to 31j are integrated with the memory switches 31a to 31j. The power may be provided separately by an LED or the like in the vicinity of the memory switch.

Next, referring to the flowchart shown in FIG. 4, the target rotation information is stored in the storage area of the target rotation information memory 40 corresponding to each memory switch. The procedure for this will be described. The target rotation information will be described by taking information frequently used in cardiovascular angiography as mentioned in the conventional example.

First, the target rotation information setting processing mode is set by operating a switch (not shown) on the operation panel 20. Then, target rotation information (rotation direction and rotation angle) is set via the operation panel 20. For example, as shown in FIG. 8 described in the conventional example, the target rotation information is set to be 30 ° in the CRAN direction and 30 ° in the LAO direction (step S1). The operation panel 20 corresponds to the input means in the present invention.

[0050] Next, the CPU 21 causes the display lamp 3la corresponding to the memory switch 30a corresponding to the set target rotation information to blink via the display control unit 24 (step S2). Note that the memory switch related to the selected target rotation information force can be easily specified from the set rotation angle, so a correspondence table of the rotation angle and memory switch is created in advance. If this is the case, this can be used easily.

[0051] In this state, the flashing memory switch corresponding to the target rotation information set in step S1 is pressed. Here, only when the memory switch 30a in the flashing state is pressed, which is placed on the additional operation panel 30 at the position indicating the CRAN and LAO directions, and will press the memory switch 30a. Proceed (step S3). For this reason, the operator It becomes possible to select the corresponding memory switch without fail.

[0052] When the flashing memory switch is pressed, the CPU 21 changes the indicator corresponding to the memory switch to a lighting state (step S4). As a result, it can be determined at a glance that the memory switch to be stored is selected.

[0053] Then, stored by pressing the setting memory switch (not shown) on the operation panel 20, CPU 2 1 the purpose rotation information (CRAN30 °, LAO30 ⁰⁾ that is set to the intended rotational information memory 40 (Step S5). Here, the CPU 21 and the setting storage switch correspond to the operating means of the present invention. Even if the setting storage switch is pressed, the storage operation is not performed unless the memory switch is lit in step S4 (unless the correct memory switch is selected). The CPU 21 corresponds to the read control means of the present invention.

[0054] Finally, it is determined whether or not the force to end the setting is made, and the process is branched (step S6). Here, since there are eight pieces of target rotation information that need to be set, the process returns to step S1 and continues.

[0055] As described above, the target rotation information is stored in the target rotation information memory 40 corresponding to each of the memory switches 3 Ob to 30i by repeating Step S1 to Step S6.

In the embodiment described above, the CPU 21 and the display control unit 24 correspond to the display control means of the present invention.

[0057] In the embodiment described above, the lighting state of the indicator lamp is changed from the blinking state to the lighting state, but it may be changed from the lighting state to the blinking state. In addition to pressing the setting storage switch (not shown), for example, the target rotation information (CRAN30 °, CRAN30 °, etc.) set by pressing the memory switch 30a pressed in step S1 for a certain period of time (for example, 3 seconds or more). (LA 030 °) is stored in the target rotation information memory 40 (step S3).

Next, the X-ray imaging process will be described with reference to FIG. First, the target rotation information setting processing mode is canceled by operating a switch (not shown) on the operation panel 20.

[0059] First, the photographer selects and presses a memory switch arranged at a position indicating the target rotation information from among the memory switch groups 30a to 30i arranged on the additional operation panel 30 ( Step Ul). [0060] Since these nine memory switches 30a to 30i are arranged at positions on the additional operation panel 30 related to the rotation direction and the rotation angle, they easily store desired target rotation information. The selected switch can be selected. Specifically, the description will be made on the assumption that the photographer desires photographing in the state shown in (CRAN30 °, LAO30 °) (see FIG. 8). Since the additional operation panel 30 is provided with the memory switches 30a to 30i as shown in FIG. 3, the photographer looks at the additional operation panel 30 and the memory switch 30a has a rotation angle in the CRAN and LAO directions. Therefore, it is possible to easily and quickly determine that the rotation information is intended.

Next, the CPU 21 reads the target rotation information in the target rotation information memory 40 corresponding to the memory switch selected in step U1. Specifically, the target rotation information (CRAN30 °, LAO30 °) is read from the address of the target rotation information memory 40 corresponding to the memory switch 30a (see FIG. 8). Then, the CPU 21 displays the read target rotation information on the display panel 22 through the display control unit 23 and blinks the indicator lamp 3 la corresponding to the memory switch 30a through the display control unit 24. Then, as the next switch to be operated, the indicator lamp 3 lj corresponding to the SET switch 30j blinks (step U2).

[0062] Next, by pressing the SET switch 30j of the additional operation panel 30, the CPU 21 controls the rotation so that the target rotation information read in Step U2 matches the actual rotation information. (Step U3). Even if the photographer accidentally presses the memory switch, the C-arm 1 does not start rotating until the SET switch 30j is pressed. Can prevent the subject M and the photographer. However, it is also possible to perform the rotation control when the corresponding memory switch is pressed.

[0063] In the rotation control, the CPU 21 rotates and drives the motor Ml in the CRAN direction so that the rotation angle from the rotary encoder R1 is 30 °, and the motor M2 is rotated and driven in the LAO direction. The rotation angle from the rotary encoder R2 is 30 °.

[0064] The operation panel 20 is provided with a switch for performing settings corresponding to the user who wants to turn off the indicator light of the memory switch after the C-arm 1 reaches the target position. The next operation differs depending on whether the force is set. [0065] That is, the CPU 21 determines whether or not it is in a mode setting to turn off the corresponding indicator light after reaching the target position (step U4). Then, proceed to Step U5 until the target rotation information and the actual rotation information match, the indicator light 3 la of the memory switch 30a blinks, and when it matches, the indicator light 31a corresponding to the memory switch 30a is turned on. Turn on (Step U5). Thus, even after storing the target rotation information corresponding to the operated memory switch, the memory switch to be operated next in the course of the routine processing is maintained by continuing the lighting of the indicator lamp corresponding to the memory switch. Is easy to grasp. In this embodiment, it is needless to say that the lighting state force may be switched to the blinking state.

[0066] On the other hand, when the mode is set to be turned off, the indicator light 3la of the corresponding memory switch is blinked until the target rotation information and the actual rotation information match, and the memory is stored at the time of matching. Turn off the indicator lamp 31a corresponding to the switch 30a (step U6).

At the same time, the indicator light 3 lj corresponding to the SET switch 30j also stops blinking and turns off when the target rotation information matches the actual rotation information. As a result, the photographer can determine at a glance whether or not the target rotation information and the actual rotation information match.

Next, the CPU 21 controls the high voltage generator (not shown) to supply the X-ray tube 2 with a high voltage necessary for the X-ray exposure to perform the X-ray exposure, and from the X-ray detector 3 Obtain an X-ray image (Step U7).

[0069] Finally, it is determined whether or not to end the shooting, and the process branches (in step U8). Here, since it is necessary to perform imaging in the remaining eight directions necessary for the cardiovascular angiography, the process returns to step U1 and repeatedly executes steps U1 to U8. During this repetition, the photographer can easily select the next required target rotation information from the nine memory switches 30a to 30i of the additional operation panel 30. And it can be done quickly.

In this embodiment, the memory switches 30a to 30i may be push-type switches. A force-type memory switch may be used in which these switches are displayed on a liquid crystal display panel having a touch screen. In addition, a joystick capable of pointing in multiple directions is arranged near the center of the additional operation panel 30 and the additional operation panel 30 incorporates multiple memory switches. , You can also detect the direction indicated by the joystick!

Further, in this embodiment, the cardiovascular angiography examination is taken as an example, and the imaging from nine directions has been described. However, a memory switch and a corresponding indicator lamp are provided at positions related to the rotation direction and the rotation angle. As long as it is arranged, it can be implemented in any direction.

[0072] Sarakuko, an example of an X-ray imaging device with a C-arm (supporting means) suspended from the ceiling as an X-ray imaging device has been given as an example. It can also be implemented with an X-ray imaging device that rotates around the specimen, and the support means is not limited to the C-arm.

[0073] The X-ray detector 3 is also an image intensifier 3 or an X-ray flat panel detector (FPD) that combines a two-dimensional thin film transistor (TFT) array with an X-ray conversion film such as a semiconductor or a scintillator. It can be implemented.

[0074] Further, as a modified embodiment, when there are a plurality of users who use this function, a user identification switch is added (about three) to correspond to each user and used by user 1 It is possible to add as many areas of the target rotation information memory 40 as the number of user identification switches by selecting the user identification switch 1 and the user identification switch 3 when the user 3 uses it. is there.

Industrial applicability

The present invention can be used in the medical industry that performs diagnosis using X-rays.

Claims

The scope of the claims

[1] An X-ray imaging apparatus that performs X-ray imaging from multiple directions of a subject, and supports the X-ray tube and the X-ray detector facing each other, and the body axis direction and body of the subject lying on the bed A support means that is rotatable about an axis (hereinafter referred to as a rotation direction);

Position detecting means for detecting actual rotation information of the rotation direction and the rotation angle with respect to the position of the support means around the subject;

A plurality of memory switches respectively arranged in association with the rotation direction, and target rotation information of the target rotation direction and rotation angle of the support means are stored in association with the memory switches. Purpose rotation information storage means for

An indicator lamp disposed corresponding to each of the memory switches;

When the memory switch is operated, the target rotation information corresponding to the memory switch is read from the target rotation information storage means, and the actual rotation information from the position detection means matches the read target rotation information. Rotation control means for controlling the rotation of the support means,

Display control means for driving the indicator lamp corresponding to the operated memory switch while the rotation control is being performed, or when the actual rotation information and the target rotation information match. X-ray imaging device characterized by this.

[2] The display control unit according to claim 1, wherein when the actual rotation information from the position detection unit matches the target rotation information, the display control unit changes a lighting state of the indicator lamp. The loaded X-ray equipment.

[3] While the rotation control is being performed, the display control means performs drive control so that the indicator lamp corresponding to the operated memory switch blinks or lights up, and the actual rotation from the position detection means. 3. The X-ray imaging apparatus according to claim 2, wherein when the information matches the target rotation information, the indicator lamp is controlled to turn on or blink.

[4] Drive selection means that enables the display control means to select whether or not to drive the indicator lamp when the actual rotation information from the position detection means matches the target rotation information. The X-ray imaging apparatus according to claim 1, further comprising an X-ray imaging apparatus.

[5] Input means for inputting the target rotation information; and an operating means for storing the input target rotation information in the target rotation information storage means in correspondence with the memory switch. 5. The X-ray imaging apparatus according to claim 1, further comprising an X-ray imaging apparatus.

6. The X-ray imaging apparatus according to claim 5, wherein the display control means drives an indicator lamp corresponding to a memory switch related to the target rotation information input from the input means.

7. The X-ray imaging apparatus according to claim 5, wherein when the memory switch corresponding to the driven indicator lamp is operated, the display control means changes the driving state. .

[8] The read control means for allowing storage in the target rotation information storage means only when the memory switch corresponding to the driven indicator lamp is operated is provided. 8. The X-ray imaging apparatus according to 8.

[9] An operation method of an X-ray imaging apparatus for performing X-ray imaging from multiple directions of a subject,

The X-ray tube and the X-ray detector are opposed to each other and supported by the support means that can rotate in the body axis direction and around the body axis (hereinafter referred to as the rotation direction) of the subject lying on the bed. A step of operating any one of a plurality of memory switches respectively associated with a moving direction, and real rotation information of a rotation direction and a rotation angle of the support means in advance to the memory switch. Reading out the target rotation information corresponding to the operated memory switch from the target rotation information storage means stored in response;

Controlling the rotation of the support means so that the actual rotation information from the position detection means for detecting the actual rotation information of the support means coincides with the read target rotation information; and the memory switch When the rotation control is performed or when the actual rotation information matches the target rotation information, the memory switches that are operated are connected to the corresponding indicator lamps. A step of driving an indicator lamp corresponding to the above, and an operation method of the X-ray imaging apparatus characterized by being powerful.