JP6385843B2 - X-ray diagnostic imaging equipment - Google Patents

Description

  The present invention relates to an X-ray diagnostic imaging apparatus, and more particularly to a heat dissipation technique for an X-ray detector.

  In general, in an X-ray diagnostic imaging apparatus, X-rays generated by an X-ray tube are irradiated onto a subject, and X-rays transmitted through the subject are detected and imaged by an X-ray detector. Further, when a flat panel X-ray detector (hereinafter referred to as FPD) is used as the X-ray detector, in order to ensure the stability of the operation and the accuracy of image output, the FPD of the FPD due to the heat generated from the FPD itself It is necessary to prevent temperature rise.

  On the other hand, in the conventional radiation detector, the FPD housing is kept at a constant temperature by circulating water at a constant temperature through a pipe arranged in contact with the FPD housing (for example, Patent Document 1). reference).

JP 2002-202377 A

  However, the unit for water cooling is never small and requires a large space for its arrangement.

  On the other hand, when simply using the air cooling method, in order to continuously obtain a sufficient heat dissipation effect, it is necessary to exhaust the exhaust gas outside the apparatus while using a fan with a large air volume and wind pressure. However, in this case, since the FPD is located immediately below the top plate on which the subject is placed, the exhaust hits the subject or a medical worker standing around the subject, causing discomfort or obstructing medical practice. There is a risk of becoming.

  The present invention has been made to solve the above-described problems, and prevents the subject and the surrounding medical staff from being exhausted while cooling the X-ray detector by an air cooling method. An object of the present invention is to obtain an X-ray image diagnostic apparatus capable of performing the above.

  An X-ray diagnostic imaging apparatus according to the present invention includes a top plate on which a subject is placed, an X-ray tube device disposed opposite to the top plate and movable relative to the top plate. An X-ray detector disposed opposite to the X-ray tube device with a plate interposed therebetween and movable relative to the top plate together with the X-ray tube device, cooling the X-ray detector An air cooling device having a fan for sending air and capable of changing the direction of the cooling air, and air cooling control for controlling the direction of the cooling air by the air cooling device according to the position of the X-ray detector with respect to the top plate Department.

  The X-ray diagnostic imaging apparatus of the present invention can prevent the exhaust from hitting the examinee and surrounding medical staff while cooling the X-ray detector by the air cooling method.

It is a block diagram which shows the X-ray image diagnostic apparatus by Embodiment 1 of this invention in a partial block. It is a side view which shows the fluoroscopic imaging stand of FIG. It is a block diagram which shows the relationship between the air cooling apparatus of FIG. 1, a position detector, and an air cooling control part. It is explanatory drawing which shows an example of the positional relationship of the top plate of FIG. 1, and FPD. It is explanatory drawing which shows the example in which FPD of FIG. 4 is located in the 2nd edge part of a top plate. It is a side view which shows the installation state of the 1st and 2nd fan of FIG. It is a top view which shows the example which has arrange | positioned the 1st and 2nd fan of FIG. 6 shifted in the horizontal direction. FIG. 7 is a side view showing an example of a configuration in which one of the first and second fans in FIG. FIG. 9 is an explanatory diagram showing an example of the positional relationship between the top plate and the FPD of the X-ray image diagnostic apparatus according to Embodiment 2 of the present invention. It is the figure which looked at the top plate and FPD of FIG. 9 along the Y-axis direction. It is a block diagram which shows the principal part of the X-ray image diagnostic apparatus of Embodiment 2. It is a flowchart which shows the operation | movement of the air cooling control part of FIG. It is a block diagram which shows the principal part of the X-ray image diagnostic apparatus by Embodiment 3 of this invention. It is a top view which shows the positional relationship of the support | pillar, FPD, and top plate of the X-ray diagnostic imaging apparatus by Embodiment 4 of this invention. It is a top view which shows the state which the support | pillar and FPD of FIG. 14 moved to the center of a top plate.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
Embodiment 1 FIG.
1 is a block diagram showing a partial block diagram of an X-ray image diagnostic apparatus according to Embodiment 1 of the present invention, and FIG. 2 is a side view showing the fluoroscopic imaging table of FIG. In the figure, a leg 1 is fixed on the floor of the photographing room. A support 3 is supported on the leg 1 via a connecting arm 2. An X-ray tube device 4 and an FPD 5 as an X-ray detector are supported on the column 3.

  The X-ray tube device 4 is disposed to face a top plate 6 on which a subject (not shown) is placed, and irradiates the subject with X-rays. The FPD 5 is disposed to face the X-ray tube device 4 with the top plate 6 interposed therebetween, and detects X-rays that have passed through the subject.

  The connecting arm 2 connects the support column 3 and the top plate 6 to the leg portion 1 so as to be rotatable and movable. Further, the X-ray tube device 4 and the FPD 5 are movable relative to the top plate 6 together with the support 3.

  The FPD 5 is supported by the support column 3 via a detector support (not shown) just below the top plate 6. An air cooling device 7 for cooling the FPD 5 is provided on the detector support. The air cooling device 7 has a plurality of fans, here, first and second fans 8a and 8b, which send cooling air to the lower surface of the FPD 5 (the surface opposite to the top plate 6).

  A cover 9 is provided around the lower side of the top plate 6. 1 and 2, a part of the cover 9 is removed to show the inside of the cover 9. The cooling air heat exchanged with the FPD 5 is discharged out of the cover 9 through a gap in the cover 9 or a vent (not shown) provided in the cover 9. A position detector 10 that detects the position of the FPD 5 with respect to the top plate 6 is provided between the FPD 5 and the top plate 6.

  The fluoroscopic imaging table 11 includes a leg 1, a connecting arm 2, a support 3, an X-ray tube device 4, an FPD 5, a top plate 6, an air cooling device 7, a cover 9, and a position detector 10.

  An X-ray high voltage generator 12 and a console 13 are connected to the fluoroscopic table 11. The X-ray high voltage generator 12 supplies power to the X-ray tube device 4. The console 13 is provided with a control device including an X-ray image processing unit 14 and an air cooling control unit 15. The control device has one or more computers. The air cooling control unit 15 includes a fan operation setting storage unit 16 and a fan operation control unit 17.

  FIG. 3 is a block diagram showing the relationship between the air cooling device 7, the position detector 10, and the air cooling control unit 15 of FIG. The X-ray image processing unit 14 performs image processing using the X-ray signal detected by the FPD 5. The console 13 is provided with a display device (not shown) for displaying the X-ray image obtained by the X-ray image processing unit 14.

  The fan operation setting storage unit 16 stores information (driving method information) as to which fan 8a and 8b is driven with respect to the position of the FPD 5 with respect to the top board 6, for example, as a table. The fan operation control unit 17 outputs a command signal (actuated or stopped) to the fans 8 a and 8 b based on the information from the position detector 10 and the information stored in the fan operation setting storage unit 16.

  In many cases, a medical worker who performs a medical action on the subject on the top plate 6 stands around the top plate 6. It can be predicted from the position of the FPD 5 with respect to the top board 6 where the medical staff stands around the top board 6. For this reason, the fan operation setting storage unit 16 stores in advance the position of the FPD 5 and the air blowing direction by the air cooling device 7 so as not to exhaust in the direction in which the presence of a person is predicted.

  Since the lower part of the top plate 6 is covered with the cover 9, it is preferable that the heat-exchanged cooling air is originally exhausted outside the cover 9. However, in the first embodiment, when the presence of a person around is predicted, the exhaust air is not exhausted outside the cover 9 but is exhausted into the cover 9 for the reason described above.

  FIG. 4 is an explanatory diagram showing an example of the positional relationship between the top plate 6 and the FPD 5 in FIG. 1, and shows the positional relationship seen from directly above when the top plate 6 is leveled. The planar shape of the top plate 6 is a rectangle, and the top plate 6 has a first end 6a and a second end in the longitudinal direction (the body axis direction of the subject on the top plate 6: the Y-axis direction in the figure). 6b.

  As shown in FIG. 4, when the FPD 5 is located at or near the first end 6 a of the top plate 6, a medical worker may also be located around the first end 6 a. In this case, if the cooling air flows toward the second end portion 6b, the cooling air does not hit the people around the first end portion 6a.

  Therefore, the right direction of FIG. 4 is stored in the fan operation setting storage unit 16 as the direction of the cooling air corresponding to the first end 6a. Thereby, when the FPD 5 is positioned at or near the first end portion 6a, the fan operation control unit 17 generates cooling air toward the second end portion 6b by the air cooling device 7.

  On the contrary, as shown in FIG. 5, when the FPD 5 is positioned at or near the second end 6 b of the top plate 6, the fan operation control unit 17 is controlled by the air cooling device 7 by the first end 6 a. Cooling air is generated toward

  Further, when the FPD 5 is positioned between the first end 6a and the second end 6b, the fan operation control unit 17 causes the air cooling device 7 to select one of the first and second ends 6a, 6b. Cooling air is generated toward the far side of the FPD 5.

  Further, when the FPD 5 is positioned at the center of the top plate 6 in the longitudinal direction, the fan operation control unit 17 generates cooling air toward one of the first and second end portions 6a and 6b by the air cooling device 7. Let In this case, for example, the same wind direction as the previous wind direction may be selected.

  FIG. 6 is a side view showing an installation state of the first and second fans 8a and 8b of FIG. The fans 8a and 8b are respectively disposed on opposite sides of the case 21 in which the FPD 5 is accommodated. Further, the fans 8 a and 8 b are arranged so that cooling air is generated along the longitudinal direction of the top plate 6.

  As a method of switching the air blowing direction, for example, a method of using a fan that can be forward / reversely switched as the fans 8a and 8b can be used. In this case, only one of the fans 8a and 8b may be arranged.

  As another method, for example, there is a method in which the fans 8a and 8b are arranged so that their blowing directions are reversed, and one of the fans 8a and 8b is selected and operated. In this case, if there are counter fans 8b and 8a in the air flow path of the fans 8a and 8b, the air flow may be hindered. Therefore, for example, as shown in FIG. 7, it is preferable to arrange the fans 8 a and 8 b so as to be shifted in the horizontal direction so that the air flow paths do not interfere with each other. In addition, as shown in FIG. 8, it is also preferable to adopt a configuration in which one of the fans 8a and 8b is tilted when the other is operated, and when one of the fans 8a and 8b is operated, the other is shifted laterally. .

  In such an X-ray diagnostic imaging apparatus, the direction of the cooling air by the air cooling device 7 can be changed, and the air cooling control unit 15 changes the direction of the cooling air by the air cooling device 7 according to the position of the FPD 5 with respect to the top plate 6. Since the control is performed, it is possible to prevent the exhaust from hitting the examinee and the surrounding medical staff while cooling the FPD 5 by the air cooling method without taking up a large space. Thereby, heat dissipation of the FPD 5 can be promoted efficiently.

  Further, when the FPD 5 is located at the first end 6a, the air cooling control unit 15 generates cooling air toward the second end 6b by the air cooling device 7, and the FPD 5 is located at the second end 6b. When the FPD 5 is located at the first end 6a or the second end 6b, the air cooling device 7 generates cooling air toward the first end 6a. It can prevent more reliably hitting.

  Furthermore, when the FPD 5 is located between the first end 6a and the second end 6b, the air cooling control unit 15 causes the air cooling device 7 to select one of the first and second ends 6a, 6b. Since cooling air is generated toward the far side of the FPD 5, it is more reliable that the surrounding person is exhausted even when the FPD 5 is located between the first end 6 a and the second end 6 b. Can be prevented.

  Furthermore, without using a sensor for detecting whether or not there is a person on both sides in the width direction of the top plate 6 (vertical direction in FIG. 4: X-axis direction in the drawing), the width of the top plate 6 can be reduced by a simple configuration. Even if there is a person on either side, the exhaust can be prevented from hitting the person.

In the first embodiment, the position of the FPD 5 with respect to the top plate 6 is detected by the position detector 10, but the position of the FPD 5 with respect to the top plate 6 may be obtained from other control signals or command signals.
Further, the direction of the cooling air may be changed mechanically in conjunction with the movement of the FPD 5 with respect to the top plate 6.

Embodiment 2. FIG.
Next, FIG. 9 is an explanatory view showing an example of the positional relationship between the top plate 6 and the FPD 5 of the X-ray diagnostic imaging apparatus according to Embodiment 2 of the present invention. The viewed positional relationship is shown. FIG. 10 is a view of the top plate 6 and the FPD 5 of FIG. 9 as viewed along the Y-axis direction, and shows the inside of the cover 9 with a part of the cover 9 removed.

  In the second embodiment, the case 21 is provided with a human sensing device 18 that detects the presence or absence of a person around the FPD 5. The human sensing device 18 can move relative to the top plate 6 together with the FPD 5. The human detection device 18 includes first to fourth human detection sensors 19a to 19d disposed on both sides of the FPD 5 in the width direction of the top plate 6 and on both sides of the FPD 5 in the longitudinal direction of the top plate 6, respectively. ing.

  The first person detection sensor 19 a detects whether or not a person is within a predetermined range on one side of the FPD 5 in the width direction of the top plate 6. The second person detection sensor 19b detects whether or not a person is within a predetermined range on the other side of the FPD 5 in the width direction of the top board 6. The third person detection sensor 19 c detects whether or not a person is within a predetermined range on one side of the FPD 5 in the longitudinal direction of the top plate 6. The fourth human sensor 19d detects whether or not there is a person within a predetermined range on the other side of the FPD 5 in the longitudinal direction of the top board 6.

  In addition, the air cooling device 7 of the second embodiment includes third and fourth fans 8c and 8d in addition to the first and second fans 8a and 8b. As shown in FIG. 10, the third and fourth fans 8 c and 8 d are arranged on the side surfaces of the case 21 that face each other.

  The fans 8 c and 8 d are arranged so as to generate cooling air along the width direction of the top plate 6. That is, the blowing direction by the first and second fans 8a and 8b and the blowing direction by the third and fourth fans 8c and 8d are orthogonal to each other. And the air-cooling apparatus 7 of Embodiment 2 can change the direction of a cooling wind to the width direction both sides of the top plate 6, and the longitudinal direction both sides of the top plate 6. FIG.

  FIG. 11 is a block diagram illustrating a main part of the X-ray image diagnostic apparatus according to the second embodiment. The air cooling control unit 15 according to the second embodiment controls the direction of the cooling air by the air cooling device 7 in accordance with information from the human sensing device 18. Specifically, the air cooling control unit 15 selects the direction of the cooling air so as to avoid the direction in which the person is detected by the human sensing device 18.

  FIG. 12 is a flowchart showing the operation of the air cooling control unit 15 of FIG. For example, when the FPD 5 is located in the vicinity of the first end 6 a of the top plate 6 as shown in FIG. 9, the air cooling control unit 15 determines that the direction in which no person is outside the cover 9 based on information from the human sensing device 18. It is confirmed whether it exists (step S1).

  Here, the outside of the cover 9 is the outside of the cover 9 within a range in which the presence / absence of a person can be detected by the human detection sensors 19a to 19d. 9 out. Moreover, the longitudinal direction both sides of the top plate 6 are outside the cover 9 only when the FPD 5 is located within a predetermined range from the first or second end 6a, 6b.

  If there is a direction in which there is no person outside the cover 9, the air cooling control unit 15 selects the direction of the cooling air so that the air is exhausted outside the cover 9 in the direction in which no person is present (step S2). For example, in FIG. 9, since there is no person on one side in the width direction of the top plate 6, the air cooling control unit 15 selects the downward direction (−X direction) of FIG. 9 as the direction of the cooling air.

  In addition, if there is no direction outside the cover 9, the air cooling control unit 15 selects the direction of the cooling air so that the air is exhausted into the cover 9 (step S3). For example, when the FPD 5 is at the position shown in FIG. 9 and there are persons on both sides in the width direction of the top plate 6 and outside the first end 6a, the air cooling control unit 15 moves to the right (+ Y direction) in FIG. ) Is selected as the cooling air direction.

  Further, the air cooling control unit 15 selects the direction in which the distance from the FPD 5 to the edge of the top plate 6 is shorter as the direction of the cooling air while avoiding the direction in which the person is detected by the human sensing device 18. Other configurations are the same as those in the first embodiment.

  In such an X-ray diagnostic imaging apparatus, the direction of the cooling air by the air cooling device 7 can be changed, and the air cooling control unit 15 determines the direction of the cooling air by the air cooling device 7 in accordance with information from the human sensing device 18. Since the control is performed, it is possible to prevent the exhaust from hitting the examinee and the surrounding medical staff while cooling the FPD 5 by the air cooling method without taking up a large space. Thereby, heat dissipation of the FPD 5 can be promoted efficiently.

  Further, even if the arrangement of people is different from the prediction in the prior setting, the exhaust direction can be determined more reliably avoiding the direction in which people are present.

  Further, the air cooling device 7 can change the direction of the cooling air to both sides in the width direction of the top plate 6 and both sides in the longitudinal direction of the top plate 6, and the air cooling control unit 15 detects the person by the human sensing device 18. Since the direction of the cooling air is selected so as to avoid the airflow direction, it is possible to prevent the exhaust from hitting a person with a simple configuration.

  Furthermore, the air cooling control unit 15 selects the direction in which the distance from the FPD 5 to the edge of the top plate 6 is shorter as the direction of the cooling air while avoiding the direction in which the person is detected by the human sensing device 18. The air heated by the FPD 5 can be discharged more quickly from under the top plate 6.

In the second embodiment, the information from the human sensing device 18 and the information from the position detector 10 are used in combination. However, the cooling air is not used by the position detector 10 but only from the human sensing device 18. May be determined.
In the second embodiment, the direction of the cooling air can be switched to four directions, but may be switched to two directions, three directions, or five or more directions.
Further, the number of human sensors and the detection direction are not limited to four and four directions.
Furthermore, in the second embodiment, the human detection sensors 19a to 19d move together with the FPD 5, but a plurality of human detection sensors for detecting whether or not there is a person around the top board 6 is provided on the top board 6, and the position detector The presence / absence of a person around the FPD 5 may be detected from the information from 10 and the information from the human sensor provided on the top 6.

Embodiment 3 FIG.
Next, FIG. 13 is a block diagram showing a main part of an X-ray image diagnostic apparatus according to Embodiment 3 of the present invention. In the third embodiment, for example, a changeover switch device 20 is provided on the front surface of the cover 9. The changeover switch device 20 is operated by an operator such as a medical worker around the top plate 6. The changeover switch device 20 is provided with a plurality of switches for switching the direction of the cooling air by the air cooling device 7.

  A wind direction indication (for example, a mark such as an arrow) indicating the direction of the cooling air is attached to the switch itself or in the vicinity of the switch. The operator can operate the switch corresponding to the desired direction of the cooling air by looking at the wind direction display. The fan operation control unit 17 controls the direction of the cooling air by the air cooling device 7 in accordance with a command from the changeover switch device 20. Other configurations are the same as those in the first embodiment.

  In such an X-ray diagnostic imaging apparatus, the direction of the cooling air by the air cooling device 7 can be changed, and the air cooling control unit 15 changes the direction of the cooling air by the air cooling device 7 in response to a command from the changeover switch device 20. Since the control is performed, it is possible to prevent the exhaust from hitting the examinee and the surrounding medical staff while cooling the FPD 5 by the air cooling method without taking up a large space. Thereby, heat dissipation of the FPD 5 can be promoted efficiently.

The changeover switch device 20 may be added to the console 13.
In the third embodiment, the direction of the cooling air is switched only by a command from the changeover switch device 20. For example, the changeover switch device 20 is added to the configuration of the first or second embodiment, and the fan operation control unit 17 The direction of the selected cooling air may be changed by input from the changeover switch device 20.

  In this case, the command from the changeover switch device 20 is positioned higher than the information from the position detector 10 and the information from the human sensing device 18, and the actual person arrangement is different from the assumption at the time of setting. The blowing direction can be manually changed by the changeover switch device 20. That is, the preset direction of the cooling air can be arbitrarily changed depending on the situation.

Embodiment 4 FIG.
Next, FIG. 14 is a plan view showing the positional relationship between the column 3, FPD 5 and top plate 6 of the X-ray diagnostic imaging apparatus according to Embodiment 4 of the present invention. FIG. 15 is a diagram showing the column 3 and FPD 5 in FIG. 6 is a plan view showing a state where it has moved to the center of FIG.

  In the fourth embodiment, the position of the support column 3 with respect to the FPD 5 is the same regardless of the position of the FPD 5 with respect to the top plate 6. That is, the column 3 and the FPD 5 are arranged at the same position in the longitudinal direction of the top plate 6 regardless of the position of the FPD 5. And the direction of the cooling air by the air cooling device 7 is fixed to the direction which goes straight to the support | pillar 3 through FPD5. The cooling air is discharged outside the apparatus while hitting the support column 3. Other configurations are the same as those in the first embodiment.

  In such an X-ray diagnostic imaging apparatus, since the direction of the cooling air is fixed in a direction that goes straight to the position of the column 3 where a person cannot stand, the FPD 5 can be air-cooled without taking up a large space. While cooling, it is possible to prevent the exhaust from hitting the examinee and surrounding medical staff. Thereby, heat dissipation of the FPD 5 can be promoted efficiently.

In the fourth embodiment, the support column 3 and the FPD 5 are arranged at the same position in the longitudinal direction of the top plate 6, but the support column 3 and the FPD 5 are arranged offset at different positions in the longitudinal direction of the top plate 6. The present invention can also be applied to cases where
Further, although the direction of the cooling air is fixed in the fourth embodiment, when the position of the support 3 with respect to the FPD 5 moves depending on the position of the FPD 5, The direction of the cooling air may be changed continuously.
Furthermore, the changeover switch device 20 of the third embodiment may be added to the fourth embodiment. That is, the direction of the cooling air is basically fixed, but if necessary, the direction of the cooling air may be changed by operating the switch device 20.

In the first to fourth embodiments, the FPD is shown as the X-ray detector. However, the FPD is not necessarily limited to the FPD as long as cooling by an air cooling device is required.
In the first to fourth embodiments, a general-purpose X-ray fluoroscopic imaging apparatus that generates an X-ray image composed of a moving image by fluoroscopically seeing the subject, and generates an X-ray image composed of a still image by imaging the subject. However, the present invention can also be applied to other types of X-ray diagnostic imaging apparatuses.

  3 struts, 4 X-ray tube device, 5 FPD (X-ray detector), 6 top plate, 6a first end, 6b end, 7 air cooling device, 8a first fan, 8b second fan, 8c 3rd fan, 8d 4th fan, 10 position detector, 15 air cooling controller, 18 person sensing device, 20 changeover switch device.

Claims (2)

A tabletop on which the subject is placed,
An X-ray tube device that is disposed opposite to the top plate and is movable relative to the top plate;
An X-ray detector that is disposed opposite to the X-ray tube device with the top plate interposed therebetween, and is movable relative to the top plate together with the X-ray tube device;
An air cooling device having a fan for sending cooling air to the X-ray detector and capable of changing the direction of the cooling air, and depending on the position of the X-ray detector with respect to the top plate Equipped with an air cooling control unit that controls the direction of cooling air by the air cooling device
The top plate has a first end and a second end in the longitudinal direction,
When the X-ray detector is located at the first end, the air-cooling control unit generates cooling air toward the second end by the air-cooling device, and the X-ray detector is An X-ray diagnostic imaging apparatus that generates cooling air toward the first end by the air-cooling device when positioned at the end of 2 . When the X-ray detector is positioned between the first end and the second end, the air cooling control unit is configured to cause the air cooling device to When cooling air is generated toward the far side from the X-ray detector, and the X-ray detector is located at the center between the first end and the second end, the air cooling device The X-ray diagnostic imaging apparatus according to claim 1, wherein the air cooling device generates cooling air toward one of the first and second end portions.

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