JP2005013490A - C-arm type x-ray equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily reproduce an imaging position and direction in a simple constitution. <P>SOLUTION: A C-arm 25 is so retained by a retainer 26 as to move in respective directions of arrows A, B, C, D and E and, when recording X-ray images by moving and setting the C-arm in a desired position and direction, movements (positions) in the respective directions are detected by a position detector and recorded along with the images. When the recorded X-ray images are read, the position data are also read and compared with position data obtained when moving the C-arm, and when they are agreed in one moving direction, an electromagnetic lock device moves to lock the movement in all the moving directions of the arrows A, B, C, D and E, so that the X-ray images in the positions and directions perfectly agreed with the case when recording the X-ray images in the last time can be obtained, in the locked state. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an X-ray imaging apparatus that performs X-ray fluoroscopy and imaging, and more particularly to a so-called C-arm X-ray apparatus that is used for surgical support in a surgical operating room.
[0002]
[Prior art]
Conventionally, as an X-ray imaging apparatus capable of X-ray fluoroscopy and X-ray imaging used for surgical support in a surgical operating room, an X-ray generator and an X-ray image receiving apparatus are respectively fixed to both ends of a C-arm. An X-ray imaging apparatus is known. The X-ray imaging apparatus using the C-arm is called a C-arm X-ray apparatus in JIS.
[0003]
In this C-arm type X-ray apparatus, as shown in Patent Document 1 below, the C-type arm itself can move along the arc of the C-type arm, and in the vertical and horizontal axis directions of the C-type arm. The position and the angle around each axis can be adjusted, and the X-ray image of the subject (the patient undergoing surgery) can be adjusted in any direction (height direction and horizontal direction) in any direction (direction around the vertical axis). And directions around two horizontal axes orthogonal to each other), thereby effectively supporting various operations performed on various parts.
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 2001-43994
[Problems to be solved by the invention]
However, in the conventional C-arm type X-ray apparatus, the direction and position of X-ray imaging can be made variously and can effectively cope with any actual operation, but there is no reproducibility of the imaging direction and position. Therefore, there is a problem that it is difficult to change the position / direction after taking an image at a certain position / direction and then return to the same position / direction again. Therefore, after changing the imaging position / direction according to the progress of the operation, the image is returned to the initial position / direction, and the image from the same position / direction is obtained again, and the image from the previous same position / direction is obtained. It was difficult to compare with.
[0006]
In view of the above, an object of the present invention is to provide an improved C-arm X-ray apparatus that can easily reproduce the imaging position and direction with a simple configuration.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, in the C-arm type X-ray apparatus according to the present invention, the X-ray generator, the X-ray receiver, and the X-ray receiver and the X-ray receiver are opposed to each other at both ends. A fixed C-arm, a holding device that holds the C-arm so that the C-arm can be moved in various directions, a position detector that detects position in each movement direction and obtains position data, An electromagnetic lock device that locks the movement in the direction of movement of the image, a recording device that records the position data together with the X-ray image obtained with the C-arm in the desired position and direction, and the recording device When the X-ray image is read out, the position data read at the same time is compared with the current position data, and the electromagnetic lock device is operated in all the movement directions when they match. The device and is provided is a feature.
[0008]
The C-arm can be freely moved in various directions. By moving in this way, an X-ray image can be obtained in a desired direction and position. The position (including the angle) in each movement direction is detected by a position detector, and the position data is output. When the X image is obtained and recorded in the desired direction / position as described above, the position data at that time is also recorded. The position data is read simultaneously with reading the recorded X-ray image. The read position data is compared with the position data actually detected by the position detector, and the electromagnetic lock device is activated when they match. For this reason, when an attempt is made to set the imaging direction and position by moving the C-arm, if the position data matches in a certain movement direction, the movement in that direction is locked. Since such position data comparison and movement lock based on the position data comparison are performed in all the movement directions, it is possible to obtain an X-ray image again in the direction and position completely coincident with the recorded image.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows an embodiment of the present invention. In FIG. 1, a subject 10 is laid on an operating table (top plate) 11, and an X-ray tube 21 that is an X-ray generator and an image that is an X-ray image receiver so as to sandwich the subject 10. The intensifier 22 and the TV camera 23 are arranged to face each other. Here, the TV camera 23 includes an image pickup tube, a CCD camera, and the like. The incident X-ray transmission image is converted by the image intensifier 22 and output as an optical image, and this optical image is converted into a video signal by the TV camera 23.
[0010]
The X-ray tube 21 is fixed to one end of the C-shaped arm 25, and the image intensifier 22 and the TV camera 23 are fixed to the other end. The C-arm 25 is held by a holding device 26, and this holding device 26 is attached to a stand 27. A caster is attached to the stand 27 so as to be movable on the floor of an operating room or the like, but is fixed at a desired position on the floor by a stopper.
[0011]
The C-arm 25 can be moved in various directions and positions by the holding device 26 with respect to the stand 27 as indicated by arrows. First, as shown by the arrow A, it can be moved up and down so that the position (height) in the vertical axis direction can be adjusted, and the direction in the rotational direction around the vertical axis (arrow B) can be adjusted. is there. Further, the position adjustment in the horizontal axis direction (arrow C) can be performed, and the direction adjustment in the rotation direction (arrow D) around the horizontal axis can be performed. The C-arm 25 is held so as to be movable in the arc direction (arrow E) and can rotate in the arrow E direction. That is, movement in the rotational direction as indicated by the arrow E is possible in a plane whose angle is determined in the direction of the arrow D.
[0012]
Although not shown in order to enable movement in each of these directions, the holding device 26 includes a vertical movement mechanism in the direction of arrow A, a rotation mechanism around the vertical axis in the direction of arrow B, and a horizontal movement mechanism in the direction of arrow C. , A rotation mechanism around the horizontal axis in the direction of arrow D, and an arm arc direction rotation mechanism in the direction of arrow E. Each of these mechanisms is a mechanical mechanism and can freely move manually in each direction.
[0013]
As shown in FIG. 2, each of these mechanisms is provided with a position detector such as a potentiometer and an electromagnetic lock device that fixes the movable part at a specific position and direction (angle). That is, the vertical movement mechanism 40 is provided with a position detector 41 that detects the position in the A direction and an electromagnetic lock device 42 that is fixed in the A direction, and the rotation mechanism 50 around the vertical axis has a position (angle) in the B direction. Is provided, and a position detector 51 for detecting the electromagnetic wave and an electromagnetic lock device 52 for fixing in the B direction are provided. Further, the left-right movement mechanism 60 is provided with a position detector 61 that detects the position in the C direction and an electromagnetic lock device 62 that is fixed in the C direction. The rotation mechanism 70 around the horizontal axis has a position (angle) in the D direction. A position detector 71 for detecting and an electromagnetic lock device 72 for fixing in the D direction are provided, and the arm arc direction rotating mechanism 80 is fixed in the E direction with a position detector 81 for detecting a position (angle) in the E direction. An electromagnetic lock device 82 is provided.
[0014]
In the stand 27, a power supply device for supplying high voltage power to the X-ray tube 21 is housed, and an imaging circuit 24, a control device 30, a display device 32, a recording device 33 and the like shown in FIG. Yes. Video signals obtained from the image intensifier 22, the TV camera 23, and the image pickup circuit 24 are sent to the display device 32 through the control device 30, and an X-ray fluoroscopic image or the like is transmitted by the image monitor device 31 mounted in another housing. Is displayed.
[0015]
A doctor who performs the operation moves the C-arm 25 in each direction so as to obtain an X-ray image of a desired part from the most appropriate position and direction for the operation, and determines the imaging direction and position. The X-ray fluoroscopic image at this time appears on the image monitor device 31, so that the operation can be performed while observing this. Further, the X-ray image can be taken and recorded in the recording device 33 as required by the doctor. The recording device 33 includes a hard disk recording device, a recording device using a removable medium such as a magneto-optical disk device, and the like.
[0016]
When an X-ray image is recorded in this way, position data representing the imaging direction / position is also attached to the image and recorded. That is, when the direction and position of the C-arm 25 are determined as described above, position signals representing the respective directions and positions are sent from the position detectors 41, 51, 61, 71 and 81 to the control device 30. These position data are recorded together with the X-ray image.
[0017]
When it becomes necessary to observe the image in the same imaging direction / position again after the operation has progressed and the imaging direction / position has been changed sequentially, the image recorded in the recording device 33 is read out. Display on the image monitor device 31. Then, position data relating to the direction and position where the image was taken is also read and taken into the control device 30.
[0018]
When a doctor or the like manually moves the C-arm 25 in each direction in this state, each position at that time is detected by the position detectors 41, 51, 61, 71, 81 and a position signal is sent to the control device 30. . The control device 30 compares the detected position data with the read position data, and when they match, sends a command to the electromagnetic locking devices 42,... To lock the mechanism. For example, when moving in the E direction, when the current E direction position signal output from the position detector 81 matches the E direction recording data, a command is sent to the electromagnetic lock device 82 to rotate the arm in the arc direction. The mechanism 80 is locked and the movement in the E direction is fixed. Thereafter, the mechanism 80 cannot be manually moved in the E direction. In this way, if the movement and lock are sequentially performed in each direction, and the lock is made in all the movement directions, the locked image pickup direction / position must completely match the direction / position in which the previously recorded image was taken. become. Therefore, since X-ray images can be obtained in exactly the same direction and position, it is possible to make a useful comparison with the previously captured image.
[0019]
In the above, a combination of the image intensifier 22 and the TV camera 23 is used as the X-ray image receiving apparatus. However, an X-ray transmission image called a so-called FPD (flat panel detector) is directly converted into an electrical image signal. It is also possible to use a semiconductor X-ray detector that converts to X. Further, the configuration of the holding device 26 of the C-arm 25, the point attached to the movable stand 27, the configuration in which the image monitor device 31 is mounted in a separate housing, and the like are not limited. Other configurations can be variously changed.
[0020]
【The invention's effect】
As described above, according to the C-arm type X-ray apparatus of the present invention, the simple structure of including the position detector and the electromagnetic lock device in each of the mechanisms capable of moving in each direction, The same imaging direction and position as the recorded X-ray image can be reproduced and an X-ray image in the same imaging direction and position can be easily obtained. For this reason, when two X-ray images are compared, the same imaging direction and position are ensured, so that medically meaningful and useful comparison is possible.
[Brief description of the drawings]
FIG. 1 is a schematic front view showing the appearance of an embodiment of the present invention.
FIG. 2 is a block diagram showing a signal system of the embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Subject 11 Operating table 21 X-ray tube 22 Image intensifier 23 TV camera 24 Imaging circuit 25 C type arm 26 Holding device 27 Stand 30 Control device 31 Image monitor device 32 Display device 33 Recording device 40 Vertical movement mechanism 41 Up and down Position detector 42 in the vertical direction Electromagnetic lock device 50 in the vertical direction Rotating mechanism 51 around the vertical axis 51 Position (angle) detector around the vertical axis 52 Electromagnetic lock device 60 around the vertical axis Left and right movement mechanism 61 Position detector 62 in the left and right direction Directional electromagnetic locking device 70 Horizontal axis rotation mechanism 71 Horizontal axis position (angle) detector 72 Horizontal axis electromagnetic locking device 80 Arm arc direction rotation mechanism 81 Arm arc direction position (angle) detector 82 Arm arc Directional electromagnetic lock device

Claims (1)

An X-ray generator, an X-ray receiver, a C-arm fixed at both ends so that the X-ray generator and the X-ray receiver face each other, and moving the C-arm in various directions Desired holding device, position detector for detecting position in each movement direction to obtain position data, electromagnetic lock device for locking movement in each movement direction, and C-arm Compares the recording device that records the X-ray image obtained in the position and direction with the position data at that time, and the position data read simultaneously when reading the X-ray image from the recording device with the current position data A C-arm X-ray apparatus, comprising: a control device that operates the electromagnetic locking device in all the movement directions when the two coincide with each other.

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