JP2000342568A - X-ray ct device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow a console to operate information on the temperature adjustment of an X-ray detector by providing the console with a temperature information fetching means for fetching information expressing the temperature of the X-ray detector from a temperature adjusting device and a set temperature information supplying means for supplying information expressing set temperature to the temperature adjusting device. SOLUTION: A scanning gantry 2, a photographing table 4 and an operation console 6 are provided and X-rays are irradiated toward a detector array 24 from the X-ray tube 20 of the gantry 2. The temperature of the array 24 is adjusted by a temperature controller 32, which is provided with information including a temperature setting value from a rotating side processor 214 to control the heat generating quantity of a heater 244 on the basis of the difference of the temperature of the array 24 detected by a temperature sensor 242 and a set temperature. In this case, the temperature detected by the sensor 242 is fetched to the console 6 through an interface 62 and the temperature set by an operating device 70 is outputted to the controller 32.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an X-ray CT apparatus, and more particularly, to an X-ray generation apparatus, an X-ray detection apparatus, and an X-ray detection apparatus in which the temperature of the X-ray detection apparatus is adjusted to a set temperature. A gantry having a temperature control device to be operated, and an operator console for giving a command to the gantry to perform a scan for X-ray tomography.
le).

[0002]

2. Description of the Related Art X-ray computed tomography (CT)
An X-ray irradiator including an X-ray tube irradiates an X-ray beam having a spread (width) including an imaging range and having a thickness in a direction perpendicular to the X-ray tube. The thickness of the X-ray beam is measured using a collimator
or) X-ray passing aperture (aperture)
It can be changed by adjusting the opening degree of e), thereby adjusting the slice thickness of the imaging.

An X-ray detection apparatus is a multi-channel array in which a large number (for example, about 1000) of X-ray detection elements are arranged in an array in the direction of the width of an X-ray beam.
e) X-ray detector, whereby X-rays are detected.

An X-ray irradiating / detecting device is rotated (scanned) around an object to be photographed, and projected images of the object to be photographed by X-rays in a plurality of view directions around the object (projection: projection).
n) and their projection data (proj
computer (c) based on the action data
to generate (reconstruct) a tomographic image.

A device that scans an object to be photographed by an X-ray irradiation / detection device and obtains projections of a plurality of views is called a gantry and is installed in a dedicated section provided with X-ray shielding. A device for reconstructing a tomographic image from a plurality of views of projection is mainly composed of a data processing device using a computer and an operator (o).
An operator console provided with a (operator) operation unit is provided. The operator console is installed outside the installation section of the gantry, and is connected to the gantry by a signal cable.

[0006] In the X-ray CT apparatus, the temperature of the X-ray detector is kept constant by a temperature controller to prevent a change in sensitivity of the X-ray detector due to a change in ambient temperature. By heating with a heater, the temperature of the X-ray detector is maintained at a temperature that is significantly higher than room temperature but does not fall below the expected maximum value of the ambient temperature, for example, about 35 ° C.
Such a temperature control device is locally performed independently of control related to scanning, such as X-ray irradiation control and projection data collection control, and does not involve an operator console.

[0007]

As described above, since the operator console does not participate in the temperature control of the X-ray detector, even if the temperature of the X-ray detector becomes abnormal due to any cause, the operator console can know the temperature. There was a problem that it was not possible.

In particular, the internal temperature of the gantry housing tends to be higher than the set value of the X-ray detector due to an increase in the amount of heat generated due to the recent increase in the power of the X-ray irradiator. There has been a problem that the temperature of the X-ray detector cannot be adjusted.

Although the influence of the abnormal temperature of the X-ray detector appears as an artifact in a reconstructed image, even if an artifact appears in the reconstructed image, it takes time to find the cause. During that time, there has been a problem that the operation of the X-ray CT apparatus has to be stopped.

Further, since the set value of the temperature control of the X-ray detector is locally set, even if an attempt is made to change the set value in consideration of, for example, an increase in the internal temperature of the gantry, it cannot be performed from the operator console side. There was a problem.

The change of the set value must be performed by accessing the gantry housing. However, since this operation is not permitted to a user, a maintenance person of a maker is called. There was a problem that had to be.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide an X-ray CT apparatus capable of operating information relating to temperature control of an X-ray detector in a gantry on an operator console side. It is to realize.

[0013]

Means for Solving the Problems (1) According to a first aspect of the invention for solving the above-mentioned problems, an X-ray generation device, an X-ray detection device and a temperature of the X-ray detection device are set to a set temperature in a housing. A gantry having a temperature control device that adjusts to become, and an X-ray CT apparatus having an operator console for giving a command to the gantry and performing a scan for X-ray tomography, wherein the operator console includes:
A temperature information acquisition unit that acquires information representing the temperature of the X-ray detection device from the temperature adjustment device; and a set temperature information supply unit that supplies information representing the set temperature to the temperature adjustment device. X-ray CT apparatus.

(2) According to a second aspect of the invention for solving the above-mentioned problem, the operator console includes an operation state reading means for reading information indicating an operation state of the temperature control device; X-ray C according to (1), further comprising: a temperature state detecting means for detecting a temperature state in the housing based on the information to be expressed.
T device.

(3) In the invention according to a third aspect for solving the above-mentioned problems, the set temperature information supply means changes the set temperature information according to a temperature state detected by the temperature state detection means. (2) The X-ray CT apparatus according to (2).

(4) The invention according to a fourth aspect for solving the above-mentioned problem is characterized in that the set temperature information supply means changes information representing the set temperature in a predetermined manner. X described in any one of (3) to (3)
It is a line CT apparatus.

(Operation) In the present invention, the operator console fetches information indicating the temperature of the X-ray detector from the temperature control device in the gantry to recognize the current value of the temperature, and stores the set temperature in the temperature control device. Supply the information to be displayed and operate the set value of the temperature control.

[0018]

Embodiments of the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiment. FIG. 1 shows a block diagram of the X-ray CT apparatus. This device is an example of an embodiment of the present invention. The configuration of the present apparatus shows an example of an embodiment relating to the apparatus of the present invention.

As shown in FIG. 1, this apparatus includes a scanning gantry 2 and a photographing table 4.
And an operation console (console) 6. The scanning gantry 2 is an example of an embodiment of the gantry in the present invention. The operation console 6 is an example of an embodiment of the operator console according to the present invention.

The scanning gantry 2 has an X-ray tube 20. X
The X-rays (not shown) emitted from the ray tube 20 are shaped by the collimator 22 into, for example, a fan-shaped X-ray beam, that is, a fan beam, and are irradiated on the detector array 24. The detector array 24 includes a plurality of X-rays arranged in an array in the direction of the width of the fan-shaped X-ray beam.
It has a line detection element. The configuration of the detector array 24 will be described later.

The X-ray tube 20 is an example of an embodiment of the X-ray generator according to the present invention. The detector array 24 is an example of an embodiment of the X-ray detector according to the present invention.
X-ray tube 20, collimator 22, and detector array 24
Constitutes an X-ray irradiation / detection device. The X-ray irradiation / detection device will be described later. A data collection unit 26 is connected to the detector array 24. The data collection unit 26 collects detection data of the individual X-ray detection elements of the detector array 24.

The irradiation of X-rays from the X-ray tube 20 is controlled by an X-ray controller (controller) 28. The illustration of the connection relationship between the X-ray tube 20 and the X-ray controller 28 is omitted. The collimator 22
It is controlled by the collimator controller 30. The illustration of the connection relationship between the collimator 22 and the collimator controller 30 is omitted.

The detector array 24 includes a temperature controller 32
The temperature is adjusted by the control. Temperature controller 32
Is an example of an embodiment of a temperature control device according to the present invention. The connection relationship between the detector array 24 and the temperature controller 32 will be described later.

The components from the X-ray tube 20 to the collimator controller 30 are mounted on the rotating unit 34 of the scanning gantry 2. The rotation of the rotation unit 34 is controlled by a rotation controller 36. The illustration of the connection relationship between the rotation unit 34 and the rotation controller 36 is omitted.

The rotation unit 34 and the rotation controller 36 are housed in the housing of the scanning gantry 2. A two-dot chain line block showing the scanning gantry 2 symbolizes the outline of the housing. The housing is an example of an embodiment of the housing in the present invention. The housing of the scanning gantry 2 is provided with a fan 38 for discharging air in the housing to the outside. A plurality of fans 38 are provided, and the number of fans 38 is controlled by a fan controller 40 in the housing.

The photographing table 4 is adapted to carry a photographing object (not shown) into and out of the X-ray irradiation space of the scanning gantry 2. The relationship between the imaging target and the X-ray irradiation space will be described later.

The operation console 6 has a central processing unit 60. The central processing unit 60 is constituted by, for example, a computer. The central processing unit 60 has a control interface (interfac).
e) 62 is connected. The scanning gantry 2 and the imaging table 4 are connected to the control interface 62. The central processing unit 60 controls the scanning gantry 2 and the imaging table 4 through the control interface 62.

The data collection unit 26 in the scanning gantry 2, X
The line controller 28, collimator controller 30, temperature controller 32, rotation controller 36, and fan controller 40 are controlled through a control interface 62. In addition, these parts and the control interface 6
The individual connection with the device 2 will be described later.

The part consisting of the central processing unit 60 and the control interface 62 is an example of an embodiment of the temperature information taking means in the present invention. Also, it is an example of the embodiment of the set temperature information supply means in the present invention. Also,
It is an example of an embodiment of an operation state reading means in the present invention. It is also an example of an embodiment of the temperature state detecting means in the present invention.

A data acquisition buffer 64 is also connected to the central processing unit 60. Data collection buffer 6
4 is connected to the data collection unit 26 of the scanning gantry 2. The data collected by the data collection unit 26 is input to the data collection buffer 64. Data collection buffer 6
4 temporarily stores the input data.

The central processing unit 60 performs image reconstruction based on projections of a plurality of views collected through the data collection buffer 64. Image reconstruction includes, for example, filtered back projection (filter
d back projection) method or the like is used. The storage device 66 is also connected to the central processing unit 60. The storage device 66 stores various data, reconstructed images, programs, and the like.

The central processing unit 60 also has a display device 6
8 and the operating device 70 are connected to each other. The display device 68 displays a reconstructed image and other information output from the central processing unit 60. Operation device 7
Numeral 0 is operated by the operator to input various instructions and information to the central processing unit 60.

FIG. 2 shows a schematic configuration of the detector array 24. The detector array 24 includes a large number of X-ray detection elements 24.
This is a multi-channel X-ray detector in which (i) is arranged. The large number of X-ray detection elements 24 (i)
An X-ray incident surface curved in a cylindrical concave shape is formed. i is a channel number, for example, i = 1 to 1000.

The X-ray detecting element 24 (i) is composed of, for example, a combination of a scintillator and a photodiode. The present invention is not limited to this, and may be, for example, a semiconductor X-ray detection element using cadmium tellurium (CdTe) or the like, or an ionization chamber type X-ray detection element using xenon (Xe) gas.

FIG. 3 shows the relationship among the X-ray tube 20, collimator 22, and detector array 24 in the X-ray irradiation / detection device. 3A is a diagram illustrating a state viewed from the front, and FIG. 3B is a diagram illustrating a state viewed from the side. As shown in the figure, the X-rays emitted from the X-ray tube 20 are shaped into a fan-shaped X-ray beam 400 by the collimator 22 and are applied to the detector array 24.

FIG. 3A shows a fan-shaped X-ray beam 40.
The width of the X-ray beam 400 is shown as a width of 0. The width direction of the X-ray beam 400 matches the arrangement direction of the channels in the detector array 24. (B) shows the thickness of the X-ray beam 400.

With the body axis intersecting the fan surface of the X-ray beam 400, for example, as shown in FIG. 4, an object 8 mounted on the imaging table 4 is carried into the X-ray irradiation space. The scanning gantry 2 has a cylindrical structure including an X-ray irradiation / detection device inside.

The X-ray irradiation space is formed inside the cylindrical structure of the scanning gantry 2. An image of the imaging target 8 sliced by the X-ray beam 400 is projected on the detector array 24. The projection of the object 8 is obtained by the detector array 24. The thickness th of the X-ray beam 400 applied to the imaging target 8 is set by adjusting the aperture of the aperture of the collimator 22.

FIG. 5 schematically shows the outer shape of the housing of the scanning gantry 2. As shown in FIG.
Has a box-shaped outer shape having a through hole 202 at the center. The photographing table 4 is inserted into the through hole 202 with the photographing target placed thereon. A plurality of exhaust ports 2 are provided on the upper surface of the housing.
04 is provided. The exhaust port 204 corresponds to the fan 38. The housing is provided with an air inlet (not shown).

FIG. 6 is a block diagram of the present apparatus from the viewpoint of controlling the scanning gantry 2. As shown in the figure, a fixed-side processor (process) is provided inside the scanning gantry 2.
sors) 212 and a rotation-side processor 214 are provided. These are all configured using, for example, a microprocessor (microprocessor).

The rotation-side processor 214 scans the gantry 2
And a data collecting unit 26, an X-ray controller 28, a collimator controller 30, and a temperature controller 32, which are also mounted on the rotating unit 34. Rotation side processor 214 and data collection unit 26
Various kinds of control information are exchanged between the temperature controllers 32.

The information provided from the rotation-side processor 214 to the temperature controller 32 includes a temperature set value.
The temperature set value is an example of an embodiment of information representing a set temperature in the present invention. Information provided from the temperature controller 32 to the rotation-side processor 214 includes a temperature detection value and control output information. The temperature detection value is an example of an embodiment of information indicating the temperature of the X-ray detection device according to the present invention. The control output information is an example of an embodiment of information representing an operation state of the temperature control device according to the present invention. Note that the function of the temperature controller 32 is
14 may be provided. This is preferable in that a protocol for transmitting and receiving the above information is not required. The detected temperature value and the control output information are stored in the rotation-side processor 214.

The fixed-side processor 212 is a scanning gantry 2
The rotation controller 36 and the fan controller 40 which are mounted on the non-rotating side of the
Oversees. Various kinds of control information are exchanged between the fixed-side processor 212, the rotation controller 36, and the fan controller 40.

The fixed-side processor 212 exchanges various control information with the control interface 62. The fixed processor 212 also relays information transfer between the control interface 62 and the rotating processor 214.

The information sent from the central processing unit 60 to the rotation-side processor 214 through the control interface 62 includes the temperature set value of the detector array 24. This allows the central processing unit 60 to specify the temperature of the detector array 24 to be adjusted by the temperature controller 32.

From the central processing unit 60 to the rotation side processor 2
The information sent to 14 also includes a command to report the temperature detected value of the detector array 24 and the control output information of the temperature controller 32. As a result, the central processing unit 60 can obtain the detected temperature value of the detector array 24 and the control output information of the temperature controller 32.

As shown in FIG. 7, for example, the temperature controller 32 controls the temperature t of the detector array 24 detected by the temperature sensor 242 and the rotation-side processor 21.
Based on the difference between the set temperatures Ts (for example, 35 ° C.) given by the control unit 4, the amount of heat generated by the heater 244 is controlled, and the temperature is adjusted so that the temperature t matches the set temperature Ts. As the temperature sensor 242, for example, a thermistor (thermistor)
or). As the heater 244, for example, a heating element using electric resistance is used.

Turning on / off the power supply to the heater 244 (on
off) duty ratio (duty ratio)
o) r is, for example, PID
(Proportional, integral, de
(rivative) controlled. Information indicating detected temperature t and duty ratio r of ON / OFF of heater 244
Is transmitted from the temperature controller 32 to the rotation-side processor 214.

The temperature controller 32 also has a self-diagnosis function. With this function, for example, the disconnection of the temperature sensor 242, the disconnection of the heater 244, and other abnormalities are diagnosed, and the result is transmitted to the temperature controller 32.

The operation of the present apparatus will be described. In operation of the present apparatus, first, the temperature of the detector array 24 is raised to a set value, for example, 35 ° C. by temperature adjustment by the temperature controller 32. FIG. 8 shows an operation flow (fl) related to the temperature adjustment of the detector array 24 by the temperature controller 32.
ow) The figure is shown. Hereinafter, the temperature adjustment operation will be described with reference to FIG.

First, in step (802), it is determined whether or not a self-diagnosis mode is set. Assuming that the temperature controller 32 is always in the self-diagnosis mode at the beginning of the operation, the self-diagnosis is performed in step 804 and the presence or absence of an abnormality is determined in step 806. For example, when an abnormality such as disconnection of the temperature sensor is found, the contents of the abnormality are notified to the rotation side processor 214 in step 808, and the operation is terminated.

The rotation-side processor 214 transmits the content of the notified abnormality to the central processing unit 60. Central processing unit 6
0 indicates a message (messa) on the display 68
ge) or the like. The operator recognizes an abnormality such as disconnection of the temperature sensor 242 based on the display on the display unit 68.

If no abnormality is found by the self-diagnosis, the set temperature Ts is read in step 810. The set temperature Ts is given in advance to the internal register (register) from the rotation-side processor 214.

Next, at step 812, the temperature sensor 242
Is read, and it is determined in step 814 whether the detected temperature value t is an abnormal value. For example, if the detected temperature value t has already exceeded the set temperature Ts before starting the temperature adjustment, the control by the temperature controller 32 is impossible.

Therefore, such a temperature is determined to be abnormal. Then, in step 816, the abnormality of the temperature detection value t is notified to the rotation side processor 214, and the operation is terminated. The information indicating the abnormality of the detected temperature value t is an example of an embodiment of the information indicating the temperature of the X-ray detection device in the present invention. The abnormality of the detected temperature value t is transmitted from the rotation side processor 214 to the central processing unit 60 and displayed on the display device 68.

If the detected temperature value t is not abnormal, it is determined at step 818 whether or not the detected temperature value t is within the operating temperature range of the detector array 24. Before the start of the temperature control, the temperature of the detector array 24 is normal temperature, and usually does not fall within the operating temperature range set around 35 ° C.
Therefore, in step 820, the fact that the temperature is outside the operating temperature range is notified to the rotation-side processor 214. The information indicating that the temperature is outside the operating temperature range is an example of an embodiment of the information indicating the temperature of the X-ray detection device according to the present invention. This notification is transmitted from the rotation side processor 214 to the central processing unit 60 and displayed on the display device 68.

Next, at step 824, temperature control is performed.
Thus, PID control of the heater 244 and the like are performed based on the deviation of the detected temperature value t from the set temperature Ts. Information representing the control output is reported to the rotation side processor 214 in step 826.

Next, at step 828, it is determined whether or not the temperature adjustment has been completed. It is no good because the temperature control has just started. Then, the process returns to step 802. Here, it is determined whether the self-diagnosis mode is set or not. Since the self-diagnosis has been completed, the process proceeds to step 810 to read the set temperature Ts, and reads the detected temperature t at step 812.

If it is determined in step 814 that the detected temperature t is not abnormal, it is determined in step 818 whether the temperature is within the operating temperature range. If the temperature is in the middle of rising and it is not within the operating temperature range, the fact is notified in step 820, the temperature control is performed in step 824, the control output is notified in step 826, and the process proceeds from step 828 to step 802. Return.

The above operation is repeated until the detected temperature t falls within the operating temperature range. Thus, the temperature of the detector array 24 is raised. In the meantime, the display device 68 continues the display outside the operating temperature range. Thus, the operator can recognize that the detector array 24 is in the process of raising the temperature.

When the detected temperature t falls within the operating temperature range, the detected temperature t is notified in step 822. Then, temperature control is performed in step 824, the control output is notified in step 826, and the process returns from step 828 to step 802.
Hereinafter, the above operation is repeated, and temperature adjustment for maintaining the temperature of the detector array 24 at the set temperature Ts is performed.

By the notification of the detected temperature t in step 822, the rotation side processor 214 is notified of the detected temperature t in place of the notification of the outside of the operating temperature range. Based on this notification, the rotation-side processor 214 stops notifying the central processing unit 60 of the information outside the operating temperature range. Thereby, the display device 68
Above operating temperature range display disappears. The operator can recognize from this change in the display that the detector array 24 has reached an appropriate temperature. Further, it is possible to know that the calibration of the detector array 24 has become possible.

Next, the operator operates the operation device 70 to instruct the present device to perform calibration. Based on this command, the apparatus performs calibration of the detector array 24. Calibration is performed by a program stored in advance. After the calibration is completed, the camera is ready for shooting.

FIG. 9 is a flowchart showing the operation of this apparatus at the time of photographing. As shown in the figure, in step 902, the operator inputs a scan plan through the operation device 70. The scan plan includes X-ray irradiation conditions, slice thickness, slice position, and the like. Hereinafter, the present apparatus operates under the operation of the operator and the control by the central processing unit 60 according to the input scan plan.

In step 904, scan positioning is performed. That is, the operator presses a table feed switch (not shown) of the operation device 70 to move the imaging table 4,
The center of the imaging region of the imaging target 8 is matched with the center of rotation (isocenter) of the X-ray irradiation / detection device.

After performing such scan positioning, scanning is performed in step 906. That is, the X-ray irradiation / detection device is rotated around the imaging target 8 so that, for example, 1
000 view projections are collected in the data collection buffer 64.

After the scan, the image is reconstructed in step 908. That is, based on the projections of a plurality of views collected in the data collection buffer 64, the central processing unit 60 performs image reconstruction by, for example, a filtered back projection method or the like to generate a tomographic image. The reconstructed tomographic image is displayed on the display device 68 in step 910.

During the operation of the present apparatus, the operator appropriately calls the detected temperature t of the detector array 24 from the rotating side processor 214 and displays it on the display device 68. by this,
The current value of the temperature of the detector array 24 can be known.
Also, based on the stored value, the detected temperature t from the start of operation
The trend of the temperature adjustment can be known by displaying the trend (trend).

When the detector array 24 has an abnormal temperature or a temperature outside the operating range for some reason, the fact is displayed on the display device 68 so that the operator can immediately know. Then, by taking a countermeasure such as stopping the photographing, it is possible to avoid continuing improper photographing without noticing.

The operator also calls the control output of the temperature controller 32 from the rotation side processor 214 during the operation of the present apparatus, and causes the display 68 to display the control output. This makes it possible to know the ON / OFF duty ratio of the heater 244.

Here, since "ON" means energization to the heater, a small ratio means that the average energization amount is small, and indicates that the set temperature can be maintained with a small energization amount. . This indicates that less heating is required to maintain the set temperature because the ambient temperature is relatively high. That is, the ambient temperature of the detector array, that is, the internal temperature of the housing of the scanning gantry 2 can be roughly known from the duty ratio of ON / OFF of the heater 244.

When a high-power X-ray tube is used as the X-ray tube 20, the internal temperature of the housing increases due to its large heat generation. Also, when the temperature inside the room where the scanning gantry 2 is installed is high, the temperature inside the housing becomes high.
Since an increase in the housing internal temperature is indicated as a decrease in the ON ratio of the control output of the temperature controller 32, a trend of the control internal output from the operation start time is displayed based on the stored value, so that the history of the housing internal temperature and You can know the trend.

When the operator determines that the margin of the set temperature Ts is small based on the circumstances of the housing internal temperature or the like, or when the operator determines that the value of the set temperature Ts is inappropriate from the above-mentioned abnormal temperature notification. , Set temperature Ts
Is increased from 35 ° C. to 38 ° C., for example. This allows the temperature controller 32 to perform temperature adjustment with a sufficient margin for the ambient temperature.

The link between the control output and the set temperature is as follows.
It is preferable to perform the setting by the program of the central processing unit 60 in that the temperature setting for the temperature controller 32 is automated. With the change of the set temperature Ts, the calibration of the detector array 24 at the set temperature is performed again. As a result, it is possible to perform calibration adapted to changes in the internal temperature of the gantry. In addition, this calibration can provide accurate projection data under a new operating temperature,
It is possible to prevent the occurrence of an artifact due to a change in the temperature of the detector array 24. The calibration is preferably performed in advance for each of a plurality of preset temperatures Ts, such as 35 ° C., 36 ° C., 37 ° C., and 38 ° C., from the viewpoint of improving efficiency.

The control output is linked to the fan 38
It may be used for the purpose of controlling the number of operations of the.
That is, a command to increase the number of operations each time the ON ratio of the control output falls below a predetermined reference value is given from the central processing unit 60 to the fan controller 40 through the fixed-side processor 212. By doing so, exhaust can be performed in accordance with the heat generated inside the housing, and a rise in temperature can be suppressed.

Using the fact that the set temperature can be changed from the operation console 6 side, the output signal of the detector array 24 is inspected by intentionally changing the temperature of the detector array 24 according to a predetermined program. , So-called diagnosis of the detector array can be performed by the operation from the operation console 6 side. Thus, it is not necessary to open the housing of the scanning gantry 2 and manually operate the temperature setting value as in the related art.

[0077]

As described above in detail, according to the present invention, it is possible to realize an X-ray CT apparatus capable of operating information relating to temperature adjustment of an X-ray detector in a gantry on an operator console side. .

[Brief description of the drawings]

FIG. 1 is a block diagram of a device according to an example of an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of a detector array in the device shown in FIG.

FIG. 3 is a schematic configuration diagram of an X-ray irradiation / detection device in the device shown in FIG.

FIG. 4 is a schematic configuration diagram of an X-ray irradiation / detection device in the device shown in FIG.

FIG. 5 is a schematic diagram of an outer shape of a scanning gantry in the apparatus shown in FIG.

FIG. 6 is a block diagram of the apparatus shown in FIG. 1 viewed from the viewpoint of control of a scanning gantry 2.

FIG. 7 is a block diagram showing a detector array and a temperature controller in the apparatus shown in FIG.

FIG. 8 is a flowchart showing the operation of the apparatus shown in FIG. 1;

FIG. 9 is a flowchart showing the operation of the apparatus shown in FIG. 1;

[Explanation of symbols]

 Reference Signs List 2 scanning gantry 4 imaging table 6 operation console 8 imaging target 20 X-ray tube 22 collimator 24 detector array 26 data collection unit 28 X-ray controller 30 collimator controller 32 temperature controller 34 rotation unit 36 rotation controller 38 fan 40 fan controller 60 central processing Device 62 Control interface 64 Data collection buffer 66 Storage device 68 Display device 70 Operating device 212 Fixed processor 214 Rotating processor

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Nobuko Ogawa 127 G-Yokogawa Medical Systems Co., Ltd., 4-7 Asahigaoka, Hino-shi, Tokyo F-term (reference) 4C093 AA22 CA13 CA21 CA38 CA41 EB30 FA32 FA35 FA58 FB03 FB11 FB20 FG20

Claims (4)

[Claims] 1. A gantry having an X-ray generator, an X-ray detector, and a temperature controller for adjusting the temperature of the X-ray detector to a set temperature in a housing; An X-ray CT apparatus having an operator console for performing a scan for X-ray tomography, wherein the operator console captures information representing the temperature of the X-ray detector from the temperature controller. An X-ray CT apparatus, comprising: means for supplying information indicating the set temperature to the temperature control device. 2. The operator console, comprising: an operation state reading means for reading information indicating an operation state of the temperature control device; and a temperature state for detecting a temperature state in the housing based on the read information indicating the operation state. The X-ray CT apparatus according to claim 1, further comprising: a detection unit. 3. The apparatus according to claim 2, wherein the set temperature information supply unit changes the set temperature information according to a temperature state detected by the temperature state detection unit.
Line CT device. 4. The apparatus according to claim 1, wherein said set temperature information supply means changes information indicating said set temperature in a predetermined manner. Line CT device.