JPH02183243A - X-ray diagnostic device - Google Patents

Abstract

PURPOSE:To speed up the switching between the driving systems of an image itensifier(I,I) and a film changer(FC) by providing a link mechanism which rotates the FC in the direction of an X-ray source and moves back the I,I to align the image receiving surfaces of the I,I and FC. CONSTITUTION:The link mechanism 10 receives a rotary driving force from a driving motor 21 to rotate the FC 4 in the counterclockwise direction A around the center O1 of rotation of an arm 11 together with the arm 11. Then the center O2 of gravity rotates as shown by an arrow B and the arm 12 while moving up according to the rotation to move back the I,I3 fitted to the arm 12 upward as shown by a dotted line. Then when the FC 4 rotates counterclockwise by 90 deg., it is in the direction corresponding to a X-ray tube and at this position, the center of the image receiving surface 4a of the FC 4 and the center of the image receiving surface 3a of the I,I3 meet each other. Consequently, the constitution is simplified and the switching speed is increased.

Description

Detailed Description of the Invention [Objective of the Invention] (Industrial Application Field) The present invention converts X-rays transmitted through a subject from x*tm into an optical image using an image intensifier, and converts the optical image into a T
The present invention relates to an x1 diagnostic device that inputs an image from a V-right camera, displays a fluoroscopic image on a TV monitor, and irradiates the subject with a relatively large amount of X-rays from the X-ray source to take an X-ray image with a film changer.

(Prior art) In an X-ray diagnostic device, for example, in an X-ray fluoroscopic imaging device, T
A fluoroscopic image of the subject is displayed on the V monitor, and an X-ray image is taken on the X-ray film of the spot device based on the fluoroscopic image of the subject. That is, according to this X-ray fluoroscopic imaging device,
The X-rays emitted from the X-ray tube and transmitted through the subject are converted into an optical image by an image intensifier, and the optical image is input to the TV right camera and displayed as a perspective image on the TV monitor. Next, the operator irradiates the patient with a relatively large amount of X-rays from the X-ray tube while watching the TV monitor, and an X-ray image is captured on the X-ray film of the spot device.

By the way, in recent X-ray fluoroscopic imaging devices, an image intensifier (hereinafter referred to as 1.1) is used.

) and a film changer (hereinafter referred to as FC), which can be used interchangeably to perform fluoroscopy or photography.

FIG. 4 is a schematic configuration diagram showing an example of this type of X-ray diagnostic apparatus. As shown in the figure, an X-ray tube 2 for emitting X-rays is provided at one end of the C-shaped arm I, and 1 and 13 facing the X-ray tube 2 are provided at the other end of the C-shaped arm I. . Also I, 1
3 and the other end of the C-shaped arm 2, Fe2 is provided with an image receiving surface 4a disposed at right angles to the image receiving surface 3a of 1.13. 1.13 and Fe2 can be switched by rotating together. That is, X-ray tube 2
When I and 13 are placed opposite to the
, and a perspective image can be displayed on a TV system (not shown) from this I, 13.

Further, when Fe2 is switched and set to positions 1 and 13, a large amount of X-rays are emitted from the X-ray tube, and an X-ray image can be taken on the X-ray film in the FCA.

FIG. 5 is a schematic diagram for explaining the switching operation between 1.13 and Fe2. (a) shows 1. facing the X-ray tube 2. A diagram showing the state in which I3 is arranged, (b) is! ,
Figure 13 and Fe2 are in switching operation, (c
) is a diagram showing the state in which Fe2 is facing the X-ray tube 2, (d)
is Fe2 slide and 1. FIG. 3 is a diagram showing a state in which I3 and Fe2 are operated at a constant rate.

First, as shown in (a), X-ray tube 2 and 1. When the image receiving surface 3a of I3 faces the image receiving surface 3a, the "RAD 10" switch is pressed to switch between 1.13 and Fe2. Then, as shown in (b), Fe2 rotates 90° counterclockwise by 1°13, and then reaches the position shown in (c).

Furthermore, as shown in (c), slide Fe2 to the right and connect it to X-ray tube 2! , 13 in a constant direction (downward) to decrease the distance (SID) from 1. , 13, as shown in (d). If the image receiving surface 3a of I3 and the image receiving surface 4a of Fe2 are aligned, good diagnosis can be performed.

On the other hand, when the X-ray tube 2 and Fe2 are facing each other as shown in FIG. and 1.13 can be switched.

In this way, in the above switching operation, I.

In order to align the image receiving surface 3a of Fe.13 and the image receiving surface 4a of Fe2, the following operation was required.

(1) Rotate 1.13 and Fe2.

(2) Slide Fe2.

(3) X-ray tubes 2 and 1. Distance from I3 and Fe2 (S
Constant operation is performed to correct the difference in ID).

(Problem 8 to be Solved by the Invention) However, the conventional X-ray diagnostic apparatus described above has the following problems. In other words, 3 of the above (1) to (3)
Three drive systems are required to perform one operation.
In addition, these holding and sliding parts were necessary. In addition, since these perform mutually divided operations, Fe2
There was a problem in that the switching speed between 1 and 1 and 13 became slow.

SUMMARY OF THE INVENTION An object of the present invention is to provide an X-ray diagnostic apparatus that can simplify the drive system of an image intensifier and film changer, speed up switching of the drive system, and shorten diagnosis time.

[Structure of the Invention] (Means for Solving the Problems) In order to solve the above problems and achieve the objects, the present invention takes the following measures. That is, the present invention converts X-rays emitted from an X11 source and transmitted through a subject into an optical image using an image intensifier, inputs the optical image as a TV left camera image, and displays it as a fluoroscopic image on a TV monitor. An X-ray diagnostic apparatus for photographing X-rays transmitted through the subject through a film changer that can be switched between an image intensifier and an image intensifier, the image intensifier and the film changer being connected to each other and having a rotation center; a link mechanism that retracts the image intensifier and aligns an image receiving surface of the image intensifier with an image receiving surface of the film changer when the film changer is rotated about the rotation center in a direction corresponding to the X-ray source; It was established.

(Effects) By taking such measures, the following effects are achieved. When the film changer is rotated around the rotation center using the link mechanism, the image intensifier retracts upward, and the link mechanism balances the weight of both, making it easy to align the image receiving surface of the image intensifier with the image receiving surface of the film changer. Moreover, since the switching operation between the image intensifier and film changer is completed only by rotation, the configuration is simplified and the switching speed is increased.

(Embodiment) FIG. 1 is a schematic top view showing an embodiment of the main part of the X-ray diagnostic apparatus according to the present invention, and FIG. 2 is a schematic side view showing the switching operation between 1.13 and Fe2. Note that the same parts as those explained in FIG. 4 are given the same reference numerals, and detailed explanation thereof will be omitted. In FIG. 2, Fe2 and 1.13 are connected by a link mechanism 10. Link mechanism lO is Fe
When 2 rotates in a direction facing the X-ray tube 2 (not shown), 1
．． 13 upward, 1. ! The image receiving surface of No. 3 is made to coincide with the image receiving surface of Fe2, and at the same time, the weight of No. 1.13 and the weight of Fe2 are balanced. The ring mechanism IO is L-shaped and has a rotation center 01, one end of which is attached to the right side of the FC4, and the other end of which is attached to the right side of the FC4. ! An arm 11 is set at the center of gravity 02 of No. 3, and an arm 12 whose one end 12a is rotatably attached to the center of gravity 02 of No. 1 and 13, which is the other end of this arm 11, and the other end L2b is attached to No. 1 and 13. It is made up of. Further, as shown in FIG. 1, rotational driving force from a motor 21 is applied to the rotation center 01 of the arm 11 via a reduction gear 22. Therefore, this rotational driving force causes Fe2 to rotate about the rotation center 01 as a supporting axis. Also, the center of gravity 02 is 1. It is the center of gravity of I3, and the arm 11
When the arm 12 rotates counterclockwise, the arm 12 moves I and 13 attached to the arm 12 upward. Center of gravity 02 from center of rotation 01 to 1.13
The length Ll of the arm 11 and the rotation center 01 to Fe2
The length L2 of the arm 11 to the center of gravity 03 of I.

The amount of upward retraction movement of I3 is determined. Center of rotation 01
Accordingly, the image receiving surface of Fe2 and 1. The difference between I3 and the image receiving surface is corrected by the retraction movement amount of 1.13.

Further, the length L2 of the arm 12 and Ll of the arm 11 are used to balance the weight of 1.13 and the weight of Fe2.

FIG. 3 is a schematic configuration diagram for explaining the operation of the link mechanism 10, (a) is a diagram showing a state in which 1.13 is facing the X-ray tube 2 (not shown), and (b) is a diagram showing the state in which the link mechanism 1. It is a diagram showing a state in which Fe2 is facing an X-ray tube 2 (not shown) after the operation is completed.

Next, the operation of the embodiment configured as described above will be explained. First, the arm 1 is rotated around the rotation center O1 of the arm 11 by receiving the rotational driving force from the drive motor 21 shown in FIG.
At the same time, Fe2 rotates in the counterclockwise direction A. Then,
As shown in Fig. 2, the center of gravity 02 rotates in the direction B, and along with this rotation, the arm 12 rises and lifts 1 and 13 attached to the arm 12 as shown in Fig. 3(a). It is evacuated upward as shown by the dotted line. And Fe2 is shown in Figure 3 (a
) from the state of 90" counterclockwise, the direction corresponds to the X-ray tube 2 (not shown). At this position, the FC
4 and the center of the image receiving surface 4a of 1. The center of the image receiving surface 3a of I3 coincides with the center of the image receiving surface 3a.

Therefore, when Fe2 is rotated by the link mechanism 10, 1.13 is retracted, and 1, I3 image receiving surface 3a and F
Since the C4 image receiving surface 4a can be easily aligned and the switching operation between 1.13 and Fe2 is completed by only rotation, the configuration can be simplified and the switching speed can be increased. Also, since the link mechanism aims to balance 1.13 and Fe2,
Fe2 can be driven with the minimum driving force of the motor 21.

Note that the present invention is not limited to the embodiments described above, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

[Effects of the Invention] According to the present invention, X-rays emitted from an X-ray source and transmitted through a subject are converted into an optical image by an image intensifier, and the optical image is inputted to the TV left camera and displayed on a TV monitor. In an X-ray diagnostic apparatus that displays the X-rays transmitted through the subject on a film changer that can be switched and moved between the image intensifier and the image intensifier,
The image intensifier and the film changer are connected to each other and have a rotation center, and when the film changer is rotated about the rotation center in a direction corresponding to the X-ray source, the image intensifier is retracted and the image Since a link mechanism is provided to match the image receiving surface of the intensifier and the image receiving surface of the film changer, the image receiving surface of the image intensifier and the image receiving surface of the film changer can be easily matched, and the image intensifier and film changer can be switched easily. Since the rotation is completed by only rotation, it is possible to provide an X-ray diagnostic apparatus that has a simple configuration and can speed up the switching operation.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a schematic top view showing an embodiment of the essential parts of the X-ray diagnostic apparatus according to the present invention, FIG. 2 is a schematic side view showing a link mechanism, and FIG. 3 is a schematic side view showing the link mechanism. Diagrams to explain the operation of the mechanism,
Figure 4 shows switchable I. FIG. 5 is a diagram showing a conventional X-ray diagnostic apparatus equipped with I3 and Fe2, and is a diagram for explaining the conventional switching operation between Fe2 and 1.13. DESCRIPTION OF SYMBOLS 1... Arm, 2... X-ray tube, 3... Image intensifier, 4... Film changer, 10...
...Link mechanism, 11.12...Arm, 01...
Center of rotation, center of gravity of 02...1.13, 03...Fe
2 center of gravity. Applicant's agent Patent attorney Takehiko Suzue Figure 1, Figure 3

Claims (1)

[Claims] The X-rays emitted from the X-ray source and transmitted through the subject are converted into an optical image by an image intensifier, and the optical image is input to a TV camera to be displayed as a fluoroscopic image on a TV monitor. X transmitted through the specimen into a film changer that can be switched between
In an X-ray diagnostic apparatus for photographing radiation, the image intensifier and the film changer are connected to each other and have a rotation center, and the film changer is rotated about the rotation center in a direction corresponding to the X-ray source. An X-ray diagnostic apparatus comprising a link mechanism for retracting the image intensifier and aligning an image receiving surface of the image intensifier with an image receiving surface of the film changer.