JPH0616776B2 - X-ray fluoroscope - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention is used in the field of fluoroscopic diagnosis.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an X-ray fluoroscopic apparatus, and more particularly to an apparatus for positioning an X-ray tube / image / intensifier (II) holding apparatus without moving a subject in an angiographic examination by fluorography. .

(B) Prior art In recent years, hepatoclavicular position imaging (Hepat imaging) has been performed in the diagnosis of heart disease.
There is an increasing number of reports of imaging at an axial position represented by the o-Clavical Projection (abbreviated as “HC Projection”), and it is receiving attention. This radiography is, so to speak, for obtaining an image of the X-ray tube and the photoreceiver facing each other around the long axis of the heart.

In this case, the X-ray tube / I.V. Until the imaging position is determined without moving the subject. The operation of the I holding device will be described with reference to FIGS. 4 and 5. When the human heart is viewed as a cone, its geometrical position can be shown almost as in FIG.

Therefore, the X-ray tube and the I.V. In order to execute the HC procedure which rotates I, first, the rotation angle is 20 degrees in the horizontal direction (Oblique) shown in FIG. 5 (A), and the vertical direction (Sag is shown in FIG. 5 (B)).
by the rotation angle of 45 degrees to the X-ray tube and the I.V. The center axis of rotation of I coincides with the long axis of the heart. Further, as shown in FIG. 6 (C), the rotation of 45 degrees brings the basic direction of the HC projection, that is, the right atrium, the left atrium, the right ventricle, and the left ventricle to the direction in which they can be simultaneously observed from the front. Is being positioned.

When FIG. 5 (C) is regarded as a front view of the apparatus example, FIG. 5 (B) is a right side view thereof, and FIG. 5 (C) is a plan view of FIG. 5 (B). Further, 10 is a stand, 12 is an X-ray tube, and 14
Is I. I and 16 are C arms or holding devices.

(C) Problems to be Solved by the Invention Although the positioning of the HC projection has been described as an example, the following problems have been pointed out.

One of them is that it takes time to fix the position because it requires movement of the three holding devices as seen in FIGS. 5 (A), (B) and (C). Secondly, as it is called the hepato-clavicular position, in this positioning, the body thickness becomes larger than in normal positioning. Therefore, it is necessary to quantitatively increase the X-ray condition, and from the viewpoint of reducing the exposure dose, we want to reduce the fluoroscopic time as much as possible. Third, HC
Since the purpose of prodition is mainly to identify congenital heart disease in children, it is necessary to shorten the examination time and reduce the number of fluoroscopy and contrast injections from the viewpoint.

The present invention provides an X-ray fluoroscopic imaging apparatus that facilitates positioning of fluoroscopic imaging without moving a vehicle to be inspected, in order to reduce the burden on the patient affected by the above problems. Has an aim.

(D) Means for Solving the Problem The means for solving the problem is to hold the X-ray tube and the image intensifier (I · I) so as to face each other.
In an X-ray fluoroscopic apparatus equipped with a holding device having axial movement, a horizontal rotation angle for aligning the central axis of rotation of the X-ray tube and II with the long axis of the site to be examined, vertical The three control knobs for setting the rotation angle of each direction and the rotation angle for fluoroscopy and one switch for instructing the drive of the holding device according to these three setting angles; A drive unit that rotationally drives the holding device in accordance with the set three direction angles and detects a displacement amount in each rotation direction, and each detected displacement amount in the drive rotation direction of the holding device matches the respective angle setting amounts. This is achieved by including a control unit for stopping the holding device.

(E) Operation The operation panel will be used to instruct three setting amounts for the rotation angle and movement, the holding device will be driven, and the actual amount of displacement will be detected and these will be fed back and fixed at the target position. To control the drive unit.

(F) Embodiment A preferred embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic block diagram showing the first embodiment, and FIG. 2 is a partial view of an arrangement example of three setting devices provided in the operation panel according to the present invention.

Reference numeral 20 is an operation panel, 22 is a movement displacement amount detector of a holding device (not shown), 24 is a drive unit including such a detector, 26
Is a control unit.

The display of "Oblique" in FIG. 2 indicates the horizontal rotation direction of the holding device, "Sagital" indicates its vertical rotation direction, and "CW" indicates clockwise rotation.
"CCW" indicates counterclockwise rotation. These volumes correspond to the respective movements shown in FIGS. 5 (A), (B), and (C), and these volumes are positioned on the holding device, that is, the X-ray device and the I.D. Preset position I. 26a is a switch connected to the control unit 26.

Therefore, when the switch "PROGRAM" is selected from the several switches 26a on the operation panel 20, for example, the motor of the drive unit 24 operates and the holding device moves. The amount of movement or displacement is detected by a detector composed of a potentiometer or encoder 22 and fed back to the circuit of the control unit 26. The control circuit compares the detection circuit with a preset setting signal to control the motor, and when the holding device reaches a desired position by the volume control, the holding device is stopped. For safety, the switch 26a used in this case is preferably a dead-man type that is operated only while the switch is pressed.

As an example of executing the HC procedure according to the present invention, CCW is 20 degrees, Sagital + 45 degrees, Obliq by three preset volumes shown in FIG.
Set to ue + 45 degrees.

Next, the position of the subject's heart is determined by X-ray tube / I.V. It also comes to the isocenter of the I-holding device. After that, the switch 26a is pushed to connect the X-ray tube and the I.D.
It brings I to the position of the HC projection. Finally, the position is finely adjusted under fluoroscopy to complete the positioning.

In the case of other aspects of the procedure, for example, when the number of presets is further increased, the efficiency of the inspection routine can be improved by the similar setting and control.

Although the floor-standing C-arm stand is described as an example with reference to FIG. 5, the overhead traveling C-arm is controlled and linked in the same manner to shorten the positioning time in biplane photography. it can.

Further, since there are other important beam projection directions, for example, as shown in FIG. 3, the plurality of switches A, B, and C are provided in accordance with the three setting amount combination modes.

(G) Effect According to the present invention, fluoroscopy, particularly positioning of the holding device in the HC projection can be performed easily and quickly, inspection efficiency is improved, and fluoroscopy may be performed only in the final fine positioning. Since the number of times the contrast agent is injected and the number of times the fluoroscopy is performed can be reduced, the burden on the subject can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic block diagram showing an embodiment of the present invention.
FIG. 2 is a partial view of a control panel according to the present invention, FIG. 3 is a partial view of another control panel, FIG. 4 is a view for explaining the position of an inspected portion in the HC projection, and FIG. 5 is an operation of a holding device. It is an example of a figure. 10 is a stand, 12 is an X-ray tube, and 14 is an I.D. I and 16 are C arms, 20 is an operation part, 22 is a position detector, 24 is a drive part, 26 is a control part, and 26a is a switch.

Claims (1)

[Claims] 1. An X-ray fluoroscopic apparatus provided with a holding device that holds an X-ray tube and an image intensifier (II) facing each other and has three axes of movement. 3 for setting the rotation angle in the horizontal direction, the rotation angle in the vertical direction, and the rotation angle for the fluoroscopy for matching the rotation center axis of the wire tube and I · I with the long axis of the region to be examined An operation panel having one preset volume and one switch for instructing the drive of the holding device according to these three setting angles, and the holding device being rotationally driven according to the three direction angles set by the switches, and displacement in each rotation direction. And a control unit for stopping the holding device when the detected displacement amounts in the drive rotation direction of the holding device match the respective angle setting amounts. Wherein the is, X-rays fluoroscopic apparatus.