JP2002085395A - X-ray ct system, its operating console, their control method and storage medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an X-ray CT system and its operating console capable of automatically displaying many kinds of tomographic images which differ in slice position and slice thickness, without requiring reconstruction conditions to be changed for image reconstruction after scans, and their control method and a storage medium. SOLUTION: During the planning of scans, many kinds of conditions for prospective reconstruction are set. For each prospective reconstruction, a start position (column 501 for 'start position') and an end position (column 502 for 'end position') for the prospective reconstruction with respect to a predetermined reference position, and slice thickness (column 503 for 'slice thickness') for the tomographic images to be reconstructed, are set. Immediately after the scans, the tomographic images based on the set kinds of conditions for reconstruction are automatically displayed in sequence.

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 (Computerizon) for reconstructing an X-ray tomographic image of a subject by X-ray irradiation.
ed Tomograpy) system and its operation console,
The present invention relates to a control method thereof and a storage medium.

[0002]

2. Description of the Related Art An X-ray CT system uses an X-ray CT system from many directions.
The subject is irradiated with a ray (X-ray projection), a scan is performed to collect projection data from each direction obtained from the detected transmitted X-ray, and a tomographic image of the subject is reconstructed based on the projection data. Widely known as Such X-ray C
The T system is characterized in that scan conditions and image reconstruction processing conditions can be arbitrarily changed within a certain range in accordance with a diagnostic site and a diagnostic purpose. In particular, once the scan is performed, the computer is used to change the reconstruction conditions (eg, image reconstruction algorithm, slice thickness, slice position, etc.) for the same projection data and reconstruct the image as many times as necessary. Being able to do so is one of the great advantages. Image reconstruction performed by changing reconstruction conditions after such a scan is referred to as “Retro Recon”.
o. Recon.) "

Incidentally, in a scan plan performed prior to a scan, generally, not only a condition set (slice position, slice thickness, X-ray tube current / voltage, etc.) relating to the scan is set, but also a tomogram is immediately displayed on a monitor immediately after the scan. It is possible to set a condition set relating to image reconstruction for displaying an image (image reconstruction algorithm, presence / absence of image filtering, matrix size, etc.). The image reconstruction performed immediately after this scan is referred to as “Prospective Reco
n.) ". Further, a plurality of types of condition sets relating to the prospective recon can be set in advance. If a plurality of types are set, the set types of tomographic images are automatically and sequentially displayed immediately after scanning.

[0004]

However, among the conventional condition sets relating to prospective recon, the items that can be set include parameters relating to the image reconstruction processing itself such as the image reconstruction algorithm and the presence or absence of filtering as described above. Was limited. Therefore, tomographic images displayed by individual prospective recons have different reconstruction algorithms and the like, but are simply reconstructed only at the same slice position and the same slice thickness set as scan conditions.

[0005] For example, as shown in FIG.
When scanning the region between B with the slice thickness T,
In the prospective recon 1 in FIG. 2B and the prospective recon 2 in FIG. 2C, only the other area is set under the same slice thickness T in the same area between AB as the scan. Could not. Actually, it is known in advance that it is necessary to see a tomographic image of a different slice thickness (T ′) only at a specific portion (region between C and D) in the scan region as shown in FIG. Despite the fact that it often occurs, it cannot be set by prospective recon, and it is necessary to reconstruct an image by retrorecon afterwards. In such a case, there is a problem that there is much waste in operation that can be realized only by retro recon.

The present invention has been made in view of such a problem, and a plurality of types of tomographic images having different slice positions and slice thicknesses from each other without changing image reconstruction by changing reconstruction conditions again after scanning. X-ray CT system, an operation console thereof, a control method therefor, and a storage medium capable of automatically displaying an image.

[0007]

To achieve the above object, for example, an X-ray CT system according to the present invention has the following arrangement. That is, an X-ray CT system that performs a scan that irradiates the subject with X-rays and collects projection data obtained from X-rays transmitted through the subject from multiple directions, wherein at least the scan condition set; Planning means for setting a reconstruction condition set of tomographic images, and image reconstructing means for reconstructing a tomographic image of the subject based on projection data collected by a scan performed in accordance with the conditions set by the planning means The planning means can set a plurality of types of reconstruction condition sets prior to the scan, and each of the reconstruction condition sets includes slice position information of a tomographic image. Features.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a block diagram of an X-ray CT system according to an embodiment. As shown in the figure, the present system includes a gantry device 10 in which an X-ray detecting mechanism for integrally irradiating the subject with X-rays and detecting X-rays transmitted through the subject is integrated.
0, an operation console 200 for performing various operation settings for the gantry apparatus 100, reconstructing and displaying an X-ray tomographic image based on data output from the gantry apparatus 100, and a reconstructed X-ray tomographic image. Image forming apparatus 30 for forming an image on a predetermined recording medium such as a film and outputting the image
0.

The gantry apparatus 100 has the following configuration, including the main controller 1 that controls the entire system.

Reference numeral 2 denotes an interface for communicating with the operation console 200. Reference numeral 3 denotes a cavity for transporting a subject (patient) lying on the table 12 (in a direction perpendicular to the drawing, hereinafter also referred to as a Z-axis). Gantry with a part,
Inside, an X-ray tube 4 (controlled by an X-ray tube controller 5) as an X-ray source, a collimator 6 having a slit for defining an X-ray irradiation range, and an X-ray irradiation range of the collimator 6 Is provided with a motor 7a which is a motor for adjusting the slit width. The driving of the motor 7a is controlled by the collimator controller 7.

The gantry 3 has an X-ray detector 8 for detecting X-rays transmitted through the subject, and a data collector 9 for collecting projection data obtained from transmitted X-rays obtained by the X-ray detector 8. Also have. The X-ray tube 4, the collimator 6, and the X-ray detector 8 are provided at positions opposing each other with the hollow part interposed therebetween, that is, with the subject interposed therebetween, and rotate around the gantry 3 while maintaining the relationship. It works. This rotation is performed by a rotation motor 10 driven by a drive signal from a motor controller 11.
The table 12 on which the subject is placed is transported in the Z-axis direction, and is driven by a table motor 13.

The main controller 1 analyzes various commands received via the interface 2 and, based on the analyzed commands, the X-ray tube controller 5, collimator controller 7, motor controller 11, table motor controller 14, and data collection. Various control signals are output to the unit 9. The main controller 1 also performs a process of transmitting the projection data collected by the data collection unit 9 to the operation console 200 via the interface 2.

The operation console 200 is a so-called workstation, and as shown in the figure, a CPU 51 for controlling the entire apparatus, a boot program and a BIOS.
, And a RAM 53 functioning as a main storage device.

The HDD 54 is a hard disk device in which an OS, a diagnostic program for giving various instructions to the gantry device 100 and reconstructing an X-ray tomographic image based on data received from the gantry device 100 are stored. Have been. The VRAM 55 is a memory for expanding the image data to be displayed. The image data and the like can be displayed on the CRT 56 by expanding the image data and the like. 57 and 58 are a keyboard and a mouse for performing various settings. An interface 59 communicates with the gantry device 100, and an interface 60 communicates with the image forming apparatus 300.

As shown in FIG. 2A, the X-ray detector 8 includes a plurality of rows arranged in the z-axis direction (in the figure, four rows of detectors h, i, j, and k having a width of 1 mm are arranged in four rows). (Disposed) detector array. A system that performs imaging using such a plurality of rows of detector arrays is called a multi-slice X-ray CT system. The slice thickness of the tomographic image in the multi-slice X-ray CT system is determined by the width of the detector and the number of detector rows used for image reconstruction. For example, as shown in FIG.
mm tomographic image I1 can be reconstructed. Further, as shown in FIG. 3C, two rows of adjacent data can be combined to reconstruct the tomographic images I1 and I2 having a slice thickness of 2 mm. As shown in FIG. Tomographic images I1, I2, I3 with a slice thickness of 1 mm for each row of data
It is also possible to reconstruct I4.

As described above, the multi-slice X-ray CT system has an advantage that a plurality of tomographic images and / or a tomographic image having a desired slice thickness can be obtained by one scan. These slice thicknesses can be selected at the time of planning the scan, or the slice thickness can be changed again after the scan and the image can be reconstructed.

The configuration of the X-ray CT system in the embodiment is generally as described above. Subsequently, the X-ray C
An outline of the processing in the T system will be described with reference to the flowchart in FIG.

First, when the power supply (not shown) of the system is turned on, an OS and a diagnostic program stored in the HDD 54 are read into the RAM 53 by an initial program loading function, and the OS is started to use the X-ray CT system. (Step S1). Thereafter, the subject is laid on the table 12 to perform positioning (step S2).

Next, a scout scan is performed (step S3). The scout scan means that the X-ray tube 4 and the X-ray detector 8 are not rotated and fixed at a fixed angle, and the X-rays are continuously radiated while gradually transporting the table 12 on which the subject is placed. One X-ray two-dimensional fluoroscopic image is obtained from the obtained projection data. When the scout scan is completed, the process proceeds to step S4, and a scan plan screen is displayed on the CRT 5 together with the X-ray two-dimensional fluoroscopic image (called a scout image).
6 is displayed. The operator can make a scan plan while viewing the scout image. Details of the scan plan will be described later.

After the scan plan is completed, collection (scanning) of projection data is started in accordance with a scan execution instruction from the operator (step S5). Scanning is performed as follows. First, a position in the Z-axis direction is fixed, and an X-ray beam from the X-ray tube 4 is irradiated to the subject (X-ray projection), and the transmitted X-ray is detected by the X-ray detector 8. And this transmission X
The X-ray tube 4 and the X-ray detector 8 are rotated around the subject (that is, while changing the projection angle) in a plurality of (for example, 1000) view directions while detecting the X-rays.
Do every minute. This is called one scan as one unit.
Each of the detected transmitted X-rays is converted into a digital value by the data collection unit 9 and is converted as projection data into the main controller 1.
Is transferred to the operation console 200 via the. And
The scan position is sequentially moved in the Z-axis direction by a predetermined amount, and the next scan is performed. Such a scanning method is called an axial scanning method, and moves the scanning position in synchronization with a change in the projection angle (the X-ray tube 4 and the X-ray detecting unit 8 circulate in a spiral around the subject). A helical scan method for collecting projection data may be used. The operation console 200 reconstructs an X-ray tomographic image (prospective recon) based on the transferred projection data, and outputs the X-ray tomographic image to the CRT 56.

After the end of the scan, step S6
Then, as necessary, output (filming) of the X-ray tomographic image to the image forming apparatus 300, retro recon for obtaining an image convenient for diagnosis, or data to the HDD 54 or another recording device (not shown) Processing such as storage is performed, and finally, the power supply is shut down in step S7, and the processing of the system ends.

Hereinafter, the scan plan in step S4 will be described in detail.

FIG. 4 is a diagram showing an example of a scan plan screen displayed on the CRT 56. Note that, as described above, in fact, the scout image is simultaneously displayed on the CRT 56. The scout image may be displayed in a display window different from the scan plan screen in FIG. 4 or may be displayed in any area in the scan plan screen. Here, it is assumed that the scout image is displayed in a display window different from the scan plan screen.

The condition items to be set on the scan plan screen generally vary widely. Therefore, the scan planning screen is classified into, for example, a condition set relating to scanning, a condition set relating to image reconstruction, and a condition set relating to filming.

As shown, a "scan" tab T1,
“Image reconstruction” tab T2 and “film” tab T3
, Three tabs are provided, and when a desired tab is clicked, only relevant condition items are displayed on the foreground. As an initial state when the scan plan screen is displayed, scan-related condition items are displayed on the foreground. The illustrated example shows this initial state or a state in which the scan tab T1 is clicked and the scan-related condition items are displayed.

In the figure, in a [start position] column 401, a scan start position with respect to a predetermined reference position (for example, the orbital canal line is set to 0) is input.
In an [end position] column 402, an end position of the scan with respect to a predetermined reference position is input. In the [number of images] field 403, the optimum number of images is calculated and displayed automatically when all other input fields are input. A [slice thickness] column 404 is a column for inputting a slice thickness of an X-ray tomographic image to be reconstructed. As described above, the X-ray detection unit 8 sets four detector rows each having a thickness of 1 mm. Therefore, any one of 1 mm, 2 mm, 3 mm, and 4 mm can be designated as the slice thickness. In the [image interval] column 405, the interval for each reconstructed X-ray tomographic image is automatically calculated based on the set slice thickness and displayed. In the [X-ray tube voltage] column 406 and the [X-ray tube current] column 407, the values of the tube voltage and tube current of the X-ray tube 4 are input.

When a “localize” button 408 is clicked, a “start position” column 401 and an “end position” column 40
2, the scan position (slice position) is displayed on the scout image, reflecting the contents input in the [slice thickness] column 404. FIG. 11 is a diagram showing an example.

In the figure, a part of a subject (for example, a patient's torso) is displayed in a scout image display window 1100.
Are displayed along the z-axis. As shown in the figure, on the scout image 1101, the scan start position 1102S and the scan end position 1102E are displayed by solid lines, and the other scan positions 1103a to 1103j are displayed by dotted lines. Such a display allows the operator to confirm the planned scan position.

FIG. 5 is a diagram showing an example of a scan plan screen when the image reconstruction tab T2 is selected. Conditions for image reconstruction by prospective recon are set here. In the figure, the [Start Position] column 501 is used to input the start position of the prospective recon with respect to a predetermined reference position, and similarly, the [End Position] column 502 is input with the end of the prospective recon with respect to the predetermined reference position. Enter the position. The [slice thickness] column 503 is a column for inputting the slice thickness of the X-ray tomographic image to be reconstructed.
In the [image interval] column 504, the interval for each reconstructed X-ray tomographic image is automatically calculated based on the set slice thickness and displayed. The feature is that the start position, the end position, and the slice thickness for these prospective recons can be set separately from the scan conditions.

In a [reconstruction algorithm] column 505, a plurality of types of predetermined image reconstruction algorithms are selected and input. In the [image filter] column 506, a user selects and inputs from a plurality of predetermined types of image filters. Differences in the image reconstruction speed and the characteristics of the tomographic image occur depending on the difference between the image reconstruction algorithm and the image filter. These are selected according to the diagnostic site and the diagnostic purpose. Here, a detailed description of the content of the image reconstruction algorithm and the image filter is omitted. In the [matrix size] column 507, a plurality of types of predetermined tomographic image display matrix sizes (for example, 256 × 256 and 128 × 128) are selected and input.

The condition items relating to image reconstruction are as described above. As shown in the figure, when the image reconstruction tab T2 is selected, a [reconstruction a] button 508 is displayed on the screen.
[Reconstruction b] button 509 and [Reconstruction c] button 510 appear. Each button corresponds to three types of prospective recons, prospective recon a, prospective recon b, and prospective recon c, and by clicking any button, a condition set for the corresponding prospective recon is set. You can do it.

Normally, a condition set for prospective recon a is displayed, but when a [prospective recon b] button 509 is clicked, the display switches to condition item display for prospective recon b. Each item can be set. Similarly, if the [Reconstruction c] button 510 is clicked, the display switches to the condition item display for prospective recon c, and each item can be set. In this manner, a plurality of types of prospective recon condition sets can be set at the time of scan planning, and immediately after scanning, tomographic images based on the set respective types of reconstruction conditions are automatically and sequentially displayed.

The conditions under which prospective recon can be set depend on the actual scanning conditions (for example, it is of course impossible to reconstruct an image at a position where scanning is not actually performed). Therefore, in each item of FIG.
When contents inconsistent with the scan conditions set on the scan plan screen shown in (1) are input, it is desirable to alert the operator, for example, by displaying the input contents in red.

After selecting the image reconstruction tab T2 and inputting the above items, when the [Localize] button 408 is clicked, the [Start position] column 501 and the [End position] column 5
02 and the contents input in the [slice thickness] column 503 are displayed in the scout image display window in FIG.
The scan position (slice position) information by the currently selected prospective recon is displayed in a superimposed manner. FIG. 12 is a diagram showing an example.

Referring to FIG. 11, a scout image display window 1100 includes a scan start position 1102S, a scan end position 1102E, and other scan positions 1103a to 1103j on a scout image 1101 similar to that shown in FIG. Is displayed. Then, a predetermined mark is displayed at a scan position related to image reconstruction by the currently selected prospective recon. In the illustrated example, the scan position 1102 related to the image reconstruction position by the planned prospective recon.
S, 1103d, and 1103h display triangle marks 1201a, 1201b, and 1201c, respectively.

The marking means may be of any other form as long as it can be visually recognized by the operator.
Furthermore, you may combine each form. For example, instead of the illustrated triangular marks, the display color of the straight line indicating the scan position itself may be changed to a color different from the straight lines indicating the other scan positions.

FIG. 6 is a diagram showing an example of a scan plan screen when the "film" tab T3 is selected. Here, a condition set relating to a film output (“filming”) from the tomographic image forming apparatus 300 is set.
In the figure, the [Auto Filming] column 601 includes:
Select ON / OFF indicating whether or not to perform auto filming and input. “Auto filming” means that a reconstructed tomographic image is automatically output as a film from the image forming apparatus 300.

In the [interval] field 602, the interval between tomographic images to be subjected to filming among the tomographic images that are continuously reconstructed is input. In the [Rotation] column 603, the rotation angle of the reconstructed image to be filmed is selected and input from a predetermined rotation angle list, and in the [Enlargement ratio] column 604, the enlargement ratio of the reconstructed image is set. Select and input from a predetermined enlargement ratio list. [Comment] column 605 is a column for inputting an arbitrary comment.

Next, an example of a scan performed according to the above-described scan plan and a display mode of a tomographic image by prospective recon will be described.

FIG. 7 shows that three scans of scan 1, scan 2, and scan 3 have been performed on the area between A and B. Here, each of the prospective recon a, the prospective recon b, and the prospective recon c reconstructs an image with a different slice thickness in a region between A and B which is the same as the scan. In this way, a plurality of tomographic images having different slice thicknesses for the same region can be displayed immediately after scanning,
Filming is possible.

FIG. 8 shows AB as in the example shown in FIG.
It is shown that three scans of scan 1, scan 2, and scan 3 have been performed for the area between them. In this case, each prospective recon has not only the slice thickness but also the image reconstruction position (slice). In this case, the image is reconstructed with different positions and different image intervals.

As long as adjacent scans are performed densely without any interval, an image can be reconstructed at a slice thickness and a slice position over a plurality of scans as in the prospective recon c shown in FIG. It is possible.

Although the above-described embodiment has been described on the premise of the multi-slice X-ray CT system, it can be applied to a single-slice X-ray CT system. Hereinafter, an example of a scan performed in accordance with the scan plan and a display mode of a tomographic image by prospective recon when a single slice X-ray CT system is used will be described.

FIG. 13 shows that the single-slice X-ray CT system performed five scans of scan 1 to scan 5 in the area between AB. Prospective Recon a is, for each scan,
Image reconstruction is performed with a slice thickness according to the width of the detector d. Prospective recon b is a tomographic image IB1 of scan 2.
And the tomographic image IB2 of the scan 4 is reconstructed. Also,
In prospective recon c, tomographic image I of scan 2
C1 and the tomographic image IC2 of scan 5 are reconstructed.

In a single slice X-ray CT system,
As long as adjacent scans are performed densely without an interval, it is possible to reconstruct a tomographic image having a thicker slice by combining scan data of a plurality of adjacent slices.

FIG. 14 shows that the single-slice X-ray CT system has performed five scans of scan 1 to scan 5 in the region between AB. The prospective recon a causes an image to be reconstructed for each scan. The prospective recon b combines two scan data of scan 1 and scan 2 to reconstruct a tomographic image IB1, and similarly combines two scan data of scan 3 and scan 4 to combine tomographic image I
Reconstruct B2. In the prospective recon c, the tomographic image IC1 of only the scan 3 is reconstructed.

According to the embodiment described above, a plurality of prospective recons with different conditions including the slice position, slice thickness, and image interval can be set. For example, if it is known in advance that it is necessary to see a tomographic image of a different slice thickness only at a specific site in the scan area, the tomographic image can be displayed later by retro-recon or filming can be performed. Needless to say, it is set as a prospective recon, and a tomographic image can be displayed and filmed under the automatically set conditions immediately after scanning. As a result, the number of operations can be greatly reduced as compared with the case where the display is performed by the retro recon.

The contents of the condition items, the types of tabs, and the like on the scan plan screens shown in FIGS. 4 and 5 are merely examples for explaining the present invention. Can be included.

Most of the control of the X-ray CT system in the embodiment is performed on the operation console 200. Since the configuration itself of the operation console 200 can be realized by a general-purpose information processing device (workstation, personal computer, or the like), it is also possible to install software in the device and realize the configuration.

That is, an object of the present invention is to supply a storage medium (or a recording medium) on which a program code of software for realizing the functions of the above-described embodiments is recorded to a system or an apparatus, and to provide the computer or the computer of the system or apparatus Alternatively, the present invention can also be realized by a CPU or an MPU) reading and executing a program code stored in a storage medium. In this case, the program code itself read from the storage medium implements the functions of the above-described embodiment, and the storage medium storing the program code constitutes the present invention. When the computer executes the readout program code, not only the functions of the above-described embodiments are realized, but also an operating system (OS) running on the computer based on the instruction of the program code.
And the like perform part or all of the actual processing, and the processing realizes the functions of the above-described embodiments.

[0052]

As described above, according to the present invention,
An X-ray CT system capable of automatically displaying a plurality of types of tomographic images having different slice positions and slice thicknesses without changing the reconstruction conditions again after scanning and performing image reconstruction, and an operation console thereof , A control method thereof and a storage medium can be provided.

[Brief description of the drawings]

FIG. 1 is a block configuration diagram of an X-ray CT system according to an embodiment.

FIG. 2 is a diagram for explaining slice thickness control according to the embodiment.

FIG. 3 is a flowchart illustrating an outline of processing according to the embodiment;

FIG. 4 is a diagram illustrating an example of a scan plan screen according to the embodiment.

FIG. 5 is a diagram illustrating an example of a scan plan screen according to the embodiment.

FIG. 6 is a diagram illustrating an example of a scan plan screen according to the embodiment.

FIG. 7 is a diagram illustrating an example of a display mode of a tomographic image according to the embodiment.

FIG. 8 is a diagram illustrating an example of a display mode of a tomographic image according to the embodiment.

FIG. 9 is a diagram illustrating an example of a display mode of a tomographic image according to the embodiment.

FIG. 10 is a diagram for explaining a problem to be solved by the invention.

FIG. 11 is a diagram illustrating an example of a scout image display window according to the embodiment.

FIG. 12 is a diagram illustrating an example of a scout image display window according to the embodiment.

FIG. 13 is a diagram illustrating an example of a display mode of a tomographic image according to the embodiment.

FIG. 14 is a diagram illustrating an example of a display mode of a tomographic image according to the embodiment.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Masaru Seto 127 Gee Yokogawa Medical System Co., Ltd., 4-7, Asahigaoka, Hino-shi, Tokyo 127 GE Yokogawa Medical System Corporation F-term (reference) 4C093 AA22 CA18 FA35 FA44 FE30

Claims (11)

[Claims] An X-ray CT system for irradiating a subject with X-rays and performing a scan for collecting projection data obtained from X-rays transmitted through the subject from multiple directions, comprising at least a condition set for the scan. Planning means for setting a reconstruction condition set of the tomographic image; and an image for reconstructing the tomographic image of the subject based on projection data collected by a scan performed in accordance with the conditions set by the planning means. And reconstruction means, wherein the planning means can set a plurality of types of reconstruction condition sets prior to the scan, and each of the reconstruction condition sets includes slice position information of a tomographic image. An X-ray CT system comprising: 2. The X-ray CT system according to claim 1, wherein each of the reconstruction condition sets further includes slice thickness information of a tomographic image to be reconstructed. 3. The apparatus according to claim 1, further comprising a unit configured to acquire the two-dimensional fluoroscopic image of the subject by transporting the subject while fixing the irradiation angle of the X-ray to the subject at a predetermined angle. The apparatus further includes display means for displaying a two-dimensional fluoroscopic image of the subject, a scan position defined by the scan condition set set by the planning means, and a slice position defined by the reconstruction condition set. The X-ray CT system according to claim 1 or 2, wherein: 4. A control method for an X-ray CT system for performing a scan for irradiating an object with X-rays and collecting projection data obtained from X-rays transmitted through the object from multiple directions, wherein at least the scan A set of conditions and a set of conditions for reconstructing the tomographic image, and a tomographic image of the subject is reconstructed based on projection data collected by a scan performed in accordance with the conditions set in the planning process. An image reconstruction step to configure, and wherein the planning step is capable of setting a plurality of types of reconstruction condition sets prior to the scan, and each of the reconstruction condition sets includes a tomographic image. A method for controlling an X-ray CT system, comprising slice position information. 5. A step of acquiring a two-dimensional fluoroscopic image of the subject by transporting the subject while fixing the X-ray irradiation angle on the subject at a predetermined angle prior to the planning step. The planning step includes a two-dimensional perspective image of the subject, a scan position defined by the scan condition set set in the planning step, and a slice position defined by the reconstruction condition set. The control method of the X-ray CT system according to claim 4, further comprising a display step of displaying. 6. An operation console of an X-ray CT system for irradiating a subject with X-rays and performing a scan for collecting projection data obtained from X-rays transmitted through the subject from multiple directions, wherein at least the scan Planning means for setting a condition set of the tomographic image and a reconstruction condition set of the tomographic image; and reconstructing the tomographic image of the subject based on projection data collected by a scan performed in accordance with the conditions set by the planning means. Image reconstruction means for constructing, wherein the planning means can set a plurality of types of reconstruction condition sets prior to the scan, wherein each of the reconstruction condition sets is a slice of a tomographic image. An operation console for an X-ray CT system, including position information. 7. The operation console of the X-ray CT system according to claim 6, wherein each of the reconstruction condition sets further includes slice thickness information of a tomographic image to be reconstructed. 8. The apparatus further comprising: a unit configured to acquire a two-dimensional fluoroscopic image of the subject by transporting the subject while fixing an irradiation angle of the X-ray to the subject at a predetermined angle. The apparatus further includes display means for displaying a two-dimensional fluoroscopic image of the subject, a scan position defined by the scan condition set set by the planning means, and a slice position defined by the reconstruction condition set. The operation console of the X-ray CT system according to claim 6 or 7, wherein: 9. A method for controlling an operation console of an X-ray CT system for irradiating a subject with X-rays and performing a scan for collecting projection data obtained from X-rays transmitted through the subject from multiple directions, A planning step of setting at least the scan condition set and the tomographic image reconstruction condition set; and a tomographic image of the subject based on projection data collected by the scan performed in accordance with the conditions set in the planning step. An image reconstruction step of reconstructing an image, comprising: wherein the planning step is capable of setting a plurality of types of reconstruction condition sets prior to the scan, and each of the reconstruction condition sets is A method for controlling an operation console of an X-ray CT system, which includes slice position information of a tomographic image. 10. A step of acquiring a two-dimensional fluoroscopic image of the subject by transporting the subject while fixing the irradiation angle of the X-ray to the subject at a predetermined angle prior to the planning step. The planning step includes a two-dimensional perspective image of the subject, a scan position defined by the scan condition set set in the planning step, and a slice position defined by the reconstruction condition set. The method of controlling an operation console of an X-ray CT system according to claim 9, further comprising a display step of displaying the operation console. 11. The X according to claim 9 or claim 10.
A storage medium storing a control program for realizing, by a computer, a control method of an operation console of a line CT system.