JPH1128205A - Fluoroscopic projection table - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically align the concerned region of a subject with the center position of fluoroscopic projection in a short time by providing a table with a coordinate scale, and controlling the movement of a table or a projection system in such a manner that the input coordinate position coincides with the center position of fluoroscopy and projection by a controller. SOLUTION: An X-coordinate scale 5 and a Y-coordinate scale 6 are provided on a table 1 for placing a subject, and the table 1 is adapted to freely move to the fluoroscopic projection central axis Z. A table support base 2 is provided integrally with a frame where an X-ray tube, a projection system and a snapshot device are fixed. In the case of projection, when the X-Y coordinates of the concerned region A are input to a controller 3, and a decision key 13 is pressed, the table 1 is moved through a table slide mechanism in such a manner that the concerned region A coincides with the fluoroscopic projection central axis Z. The positioning mechanism for the table 1 is formed by using a mechanism using a pulley for converting the rectilinear motion of the table 1 to the rotary motion.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an X-ray fluoroscope for positioning a site of interest at the time of fluoroscopy or radiography.

[0002]

2. Description of the Related Art As shown in FIG.
X-ray tube 9, table 1 on which subject 4 is placed, imaging system 10
(For example, an image intensifier, a TV camera), a rapid shooting device 11 (for direct shooting), and a frame 8 for mechanically holding these.

[0003] The X-ray tube 9, the imaging system 10, and the flash unit 11
A straight line connecting the centers of the X-ray tube 9 and the table 1 is an X-ray tube 9.
Provided between the imaging system 10 and the speed-taking device 11, the longitudinal direction (referred to as the Y-axis) and the width direction (referred to as the Y-axis) and the width direction (referred to as the X-axis plane) with respect to the above-described perspective imaging central axis Z. (Called axis).

When performing a fluoroscopic diagnosis by X-rays, first, the subject 4 is placed on the table 1 of the fluoroscopic table, and
While viewing the TV screen, the table 1 is moved in the longitudinal direction (Y-axis) and the width direction (X-axis) with the operation handle of the controller, and the site of interest is brought to the center of the TV screen. After this operation, direct imaging is performed at that position, so that the region of interest is imaged in the center of the film.

[0005] In addition, when direct imaging is performed without performing the above-mentioned TV fluoroscopy, an X-ray collimator 16 provided in front of the X-ray tube 9 irradiates the subject 4 with a crosshair. Apply the irradiation mark and use the operation handle of the controller to
The table is moved in the longitudinal direction (Y-axis) and the width direction (X-axis), and the region of interest of the subject 4 is brought to the above-mentioned irradiation mark of the crosshair. After this operation, by directly taking a photograph at the position, the region of interest is photographed in the center of the film.

[0006]

The conventional X-ray fluoroscopy table is constructed as described above. However, when directly photographing a region of interest of the subject 4, a TV fluoroscopy is performed and the interest is displayed on a TV screen. Only after moving the table of the fluoroscopic table so that the part is in the center of the monitor, the part of interest is not photographed in the center of the film. In such a method, the subject is slightly exposed to X-rays, and the trouble of TV fluoroscopy is required. Also, when not performing TV fluoroscopy,
Unless the table 1 is moved to align the region of interest of the subject 4 with the crosshair irradiation mark of the irradiation lamp of the X-ray collimator 16 each time, the region of interest is not photographed in the center of the film, and the time required for photographing is reduced. There was a problem that required.

The present invention has been made in view of such circumstances, and an X-ray that can automatically position a region of interest of a subject in a short time at the center position of X-ray fluoroscopy is provided. An object of the present invention is to provide a fluoroscopic table.

[0008]

In order to achieve the above object, an X-ray fluoroscopic table according to the present invention comprises a table having coordinate scales, a controller having means for inputting the coordinates of the table, and a controller. And a mechanism for moving the table or the imaging system so that the coordinate position input to the center is located at the center of fluoroscopy and imaging.

Since the X-ray fluoroscopic table of the present invention is constructed as described above, the operator reads the coordinates of the region of interest of the subject in advance and automatically inputs the coordinates to the controller, thereby automatically setting the region of interest. Can be set at the center position of X-ray fluoroscopy,
You can see through or shoot.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the X-ray fluoroscope according to the present invention will be described with reference to FIGS.

In FIG. 1, reference numeral 1 denotes a table for placing an examinee, and a table 1 having an X coordinate scale 5 and a Y coordinate scale 6.
And moves in the X direction and the Y direction on a plane (XY) perpendicular to the X-ray fluoroscopy center axis Z. The X-coordinate scale 5 and the Y-coordinate scale 6 are marked on the periphery of the table 1 and have a structure such that the site of interest A of the subject 4 can be read on the scale.

Reference numeral 2 denotes a table holding table which is fixed to a frame 8 of the X-ray fluoroscopy table, and is integrated with the frame 8 which fixes the X-ray tube 9, the imaging system 10, the speed-taking device 11, and the like.

Reference numeral 3 denotes a controller for inputting the coordinates of the region of interest A of the subject 4 lying on the table 1.
Alternatively, it is provided with a counter key, a key 13 for deciding the input, and a display section 14 (such as a liquid crystal panel) for displaying the inputted numerical value. The controller 3 and a table slide mechanism (not shown) of the fluoroscopic imaging table are electrically connected by a cable.

By inputting the X coordinate and the Y coordinate of the site of interest A into the controller 3 and pressing the enter key 13, the table slide mechanism moves the table slide mechanism so that the site of interest A is located on the X-ray fluoroscopic center axis Z. Move 1 Position of the X-ray fluoroscopic center axis Z of the table holder 2 (X = 0, Y = 0)
(X = X1, Y = Y1) of the coordinate scales 5 and 6 provided around the table 1 and a site of interest A (X = X
2, Y = Y2), the moving amount of table 1 (X = X
1 + X2, Y = Y1 + Y2).

The coordinate difference between the position of the central axis Z (X = 0, Y = 0) and the table origin (X = X1, Y = Y1) is obtained by using a potentiometer on the fluoroscopic imaging table to detect the position. , The coordinate difference is automatically stored in the memory of the controller 3.

Therefore, based on the coordinate difference and the coordinate value of the site of interest A, the table 1 is slid by the amount of movement, and the site of interest A is positioned at the center axis Z of the fluoroscopic imaging table. The positioning mechanism of the table 1 uses a pulley that converts a linear motion of the table 1 into a rotary motion, a ball screw, a touch roll attached to a movable part, and a rotary sensor on a movable part support shaft. Use the attached one, and use a potentiometer and a rotary encoder as its rotary type sensor. Alternatively, a linear potentiometer, an optical linear encoder, a magnescale, or the like is used to provide a mechanism in which the linear motion of the table is directly captured by the position sensor.

The analog or digital signal from the position sensor is automatically input to the controller 3, and the amount of movement of the table 1 is calculated by computer processing.
The slide of the table 1 is performed.

When performing a fluoroscopic diagnosis, first, the subject 4 is placed on the table 1 of the X-ray fluoroscopic table. Next, the operator approaches the table 1 and reads the scale 5 of the X coordinate and the scale 6 of the Y coordinate of the region of interest A of the subject, and inputs the values to the controller 3 using the numeric keypad 12. 3 is displayed on the display unit 14, and the key 13 for confirming and pressing the key is pressed. By this input, the table 1 slides by the table slide mechanism, and the region of interest A of the subject 4 comes to the center axis Z of the X-ray fluoroscopy, and in this state, the region of interest A is surely centered. Perspective or imaging can be performed. Therefore, X-ray technicians and doctors can immediately make a fluoroscopic diagnosis.

In the above embodiment, the case where the X-ray tube 9 and the imaging system 10 are fixed in the Z axis and the table 1 moves in the XY directions has been described. However, the table is fixed and the X-ray tube and the imaging system are integrated. Thus, the present invention can be similarly applied to a fluoroscopic imaging table that moves in the X and Y directions. In this case, the X-ray fluoroscopy center axis Z moves, and the origins of the coordinate scales 5 and 6 provided on the table are set to X = 0 and Y = 0, and the X-ray tube and the imaging system (X-ray fluoroscopy) are set. X, Y of center axis Z)
Assuming that the coordinates are X = X3 and Y = Y3, the X-ray tube 9 depends on the site of interest A (X = X2, Y = Y2) of the subject.
And the moving amount of the imaging system 10 is X = X3-X2, Y = Y3-Y
It becomes 2. The controller 3 includes an X-ray tube and an X-ray of an imaging system.
3 and Y3 are constantly detected by the position detector, and by simply inputting the coordinates (X2, Y2) of the part of interest of the subject to the controller, the X-ray tube and the X-ray fluoroscopy center axis Z of the imaging system are of interest. It moves to the position of the part.

Furthermore, in the case of a ceiling traveling type (a system in which an X-ray tube and an imaging system are integrally suspended from a ceiling by a C-shaped arm) used in a cardiovascular imaging system or the like, the ceiling-mounted system is installed on the floor. The examination table is moved in the X and Y directions,
The tube and the imaging system also move on the ceiling. In such a case,
Both move in the X and Y directions, but the same applies if both are provided with a position sensor and a slide mechanism.

In this case, whether the table is fixed and the X-ray tube and the imaging system are moved or the table is moved while the X-ray tube and the imaging system are fixed is determined on a case-by-case basis. It can be done by.

[0022]

The X-ray fluoroscopy table of the present invention is constructed as described above, so that the region of interest of the subject can be reliably positioned at the X-ray fluoroscopy center position without X-ray radiation or without X-ray radiation. Since it can be brought by a table slide without using the irradiation lamp of the line collimator, it is possible to reduce the photographing time of a large number of subjects such as a health examination.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of an X-ray fluoroscopic imaging table according to the present invention.

FIG. 2 is a diagram showing a conventional X-ray fluoroscopic imaging table.

[Explanation of symbols]

 Reference Signs List 1 Table 2 Table holding table 3 Controller 4 Subject 5 X coordinate scale 6 Y coordinate scale Z X-ray fluoroscopy center axis 8 Frame 9 X-ray tube 10 Imaging system 11 Rapid shooting device 12 Numeric keypad 13 Deciding key 14 Display unit A Interest Region 16 X-ray collimator

Claims (1)

[Claims] 1. A table provided with coordinate scales, a controller having means for inputting the coordinates of the table, and a table or an imaging system such that the coordinate position input to the controller is at the center of fluoroscopy and imaging. An X-ray fluoroscopy table, comprising: a moving mechanism.