JPH0235573B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a head holding device for a CT apparatus used for radiation tomography.

[Technical background of the invention and its problems]

As is well known, a CT device has an imaging hole in the center, and an X-ray tube and an
The object to be imaged on the top plate is inserted into the imaging hole of the gantry in which the radiation detectors are arranged facing each other, and the X-ray tube generates, for example, fan-shaped beam X-rays.
rays are emitted through the subject to an X-ray detector,
By rotating the X-ray tube and the detector relative to each other each time irradiation is performed, the angle relative to the tomographic plane is changed, for example, by 1 degree, and X-rays are generated at various angles of the tomographic plane of the affected area. After collecting absorption data, this data is analyzed by a computer, the X-ray absorption rate of each position on the tomographic plane is calculated, and the desired tomographic image is obtained by reconstructing the image with a gradation level corresponding to the absorption rate. That's what I do.

By the way, if the subject (patient) moves during the imaging, it will not be possible to obtain an accurate tomographic image, so when imaging the head using a whole-body CT device that can conventionally take tomographic images of the patient's whole body. Head restraints were used to restrict the movement of the patient's head using cushions, bands, etc.

However, the fixation device described above has not yet been able to completely eliminate the movement of the top plate in the longitudinal direction and the width direction of the top plate in the patient's head, so it is said that good tomographic images cannot be taken. There was a problem.

[Purpose of the invention]

The present invention was made based on the above circumstances, and
The purpose of the present invention is to provide a head holding device for a CT device that can suppress longitudinal and lateral movement of a top plate of a patient's head.

[Summary of the invention]

Summary of the present invention for achieving the above object is a head holder for a CT apparatus that is attached to a top plate on which a subject is placed and holds the head of the subject.
A headrest removably attached to the top plate; an auxiliary fixing member detachably fixed to the headrest and having a pair of upright pieces erected on both sides; an ear fixing member having an ear bar that is held so as to be movable in a direction transverse to the subject placement surface of the top plate and also movable in the lateral direction of the top plate; The jaw fixing member has a support rod whose movement can be adjusted in the longitudinal direction.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings. The head holding device for a CT device of the present invention includes:
As shown in FIGS. 1 to 3, there is a headrest 2 that is removably attached to the top plate 1, an auxiliary fixing member 3 that is detachably attached to the headrest 2, and a headrest that is held by the auxiliary fixing member 3 and is It is comprised of an ear fixing member 4 that is movable and adjustable in the directions of arrows A and B as well as the direction of arrow C shown in the figure, and a jaw fixing member 5 that is supported by the auxiliary fixing member 3 and that is movable and adjustable in the direction of arrow D in the figure.

The head rest 2 has a shape suitable for placing the patient's head thereon, and as shown in FIG. The end portion can be fixed to the top plate 1. As shown in FIG. 5, a recess 21 is formed in the middle part of the lower surface of the headrest 2.
A screw hole 22 is bored in the.

The auxiliary fixing member 3, as shown in FIG.
It consists of a horizontal piece 31 and a pair of upright pieces 32, 32 that stand opposite each other from both ends of the horizontal piece 31, and the recess 21 is provided in the middle part of the upper surface of the horizontal piece 31.
and a protrusion 33 that matches the screw hole 22 and the screw hole 3
4 is formed in the pair of upright pieces 32, 32, and a notch 35 extending from the upper end to the middle is formed in each of the pair of upright pieces 32, 32.
An elongated hole 36 is formed to be inclined at approximately the middle of the hole 36 . By fitting the protrusion 33 into the recess 21 and screwing the screw 62 into the screw hole 34 and the screw hole 22, the auxiliary fixing member 3 can be fixed to the headrest 2, and the upright pieces can be attached along both sides of the headrest 2. 32, 32 can be erected.

As shown in FIG. 2, the ear fixing member 4 consists of a holding plate 41 and a fixing part 42 attached to one end of the holding plate 41.
As shown in the figure, a fixed body 43 fixed to a holding plate 41, a disk 45 with a cushion 44 attached to the side opposite to the side facing the fixed body 43, and a circular plate 45 that is inserted through these fixed bodies 43 and Disc 45 and cushion 4
4, an ear bar 47 that is slidable in the direction of arrow C in the figure and has a soft member 46 at the tip located on the side facing the cushion 44;
It is constituted by a set screw 48 that prevents sliding in the direction. The ear fixing member 4 configured in this manner is constructed by inserting and screwing the adjustment bolt 63 into the elongated holes 36, 36 formed in the pair of upright pieces 32, 32 described above, and into the hole provided at the other end of the holding plate 41. By doing so, as shown in FIG. 2, a pair of upright pieces 32,
32, the soft members 46, 46 of each ear bar 47 can be attached to the ear bars 47 so as to face each other. At this time, by loosening the adjustment bolt 63, the ear fixing member 4 is moved toward the elongated hole 3 in the direction of arrow A in the figure.
It is possible to adjust the movement along the inclination 6, and also to adjust the turning movement in the direction of arrow B in the figure.

As shown in FIG. 3, the jaw fixing member 5 includes a notch 35 formed in a pair of upright pieces 32, 32,
A pair of catch fittings 51 each fixed to 35
and support rods 52, 52 that are inserted into the respective catch fittings 51 and protrude in the longitudinal direction of the top plate 1 while maintaining the interval between the opposing upright pieces 32, 32, and the top of the pair of support rods 52, 52. It consists of a chin rest 54 which is installed at the tip on the side of the plate and has a cushion 53 detachably attached to the back surface. The catch fitting 51
As shown in FIG. 8, there is a through hole 55 through which the support rod 51 is inserted, and a split groove 5 connected to the through hole 55.
6, and a hole 57 that is bored in a direction intersecting with the split groove 56 and is threaded only on the left side of the figure with the split groove 56 as a boundary, and is inserted into this hole 57 via a washer 58 and screwed together. It consists of a mounting screw 59, and the support rod 52 inserted through the through hole 55 can be freely moved in the direction of arrow D (see Fig. 3) to adjust the length of the support rod 52 that protrudes toward the top plate. screw 5
By strongly tightening 9, the catch fitting 51 can be fixed to the upright pieces 32, 32, and at the same time the support rod 52 can be fixed.
It is now possible to prevent the movement of The chin rest 54 has a substantially semicircular cutout 54a formed at the upper end of the middle portion on which the chin rests.

A method of using the head holder for a CT apparatus of the present invention constructed as described above will be explained with reference to FIGS. 9 and 10. First, place the patient's body on the top plate 1.
Place the patient's head on the mounting table, and place the patient's head on the headrest 2.
After being positioned at a predetermined position, each of the holding plates 41, 41 is moved in the A direction and the B direction so as to align the ear bars 47, 47 placed opposite to the patient's left and right ears. After adjusting the direction and height of the ear bars 47, 47, the adjustment bolt 63 is strongly tightened to fix the holding plates 41, 41 to the upright pieces 32, 32. Next, the ear bars 47, 47 are moved and set in the C direction so that the tips of the ear bars 47, 47 enter the patient's ear canals, and then the set screws 48, 48 are tightened to prevent the ear bars 47, 47 from sliding. prevent movement. At this time, the disc 45 moves together with the ear bar 47 and can press the ear together with the cushion 44.
A soft member 4 is attached to the tips of the ear bars 47, 47 that enter the ear holes.
6 and 46 are attached, so there is no chance of damaging your ears.

Next, the upright pieces 32, 32 are installed facing each other.
Insert the catch fittings 51, 51 from above into the notches 35, 35 formed in the
9, 59, the catch fittings 51, 51 are semi-fixed according to the height of the patient's chin, and the cushion 53 attached to the notch 54a of the chin rest 54 touches the patient's chin. After adjusting the support rods 52, 52 by moving them in the D direction, firmly tighten the mounting screws 59, 59 to prevent the movement of the support rods 52, 52, and at the same time attach the catch fittings 51, 51 to the upright pieces 32, 32. Fix it.

The patient's head, which has been positioned at a predetermined position on the headrest 2 in this way, can be moved and adjusted as appropriate by moving and adjusting the ear fixing member 4 and the jaw fixing member 5, regardless of the size of the head and the length of the face. Since the jaw can be fixed, movement of the patient on the headrest 2 can be completely eliminated.

In addition, if a head holder for CT equipment is not required,
The head rest 2, the auxiliary fixing member 3, the ear fixing member 4, and the jaw fixing member 5 can all be removed and stored.

Incidentally, as shown in FIG. 11, a fixing member 70 is detachably provided on the top plate 1 between the top plate 1 and the headrest 2 equipped with the device of the present invention (not shown in FIG. 11). A movable member 71 is provided which is pivotally supported by the fixed member 70 and is slidable in the lateral direction of the top plate (in the direction of arrow E in the figure) on a surface parallel to the subject placement surface of the top plate 1. If the headrest 2 is pivotally supported at one end of the movable member 71, the headrest 2 can be pivoted (in the direction of arrow F in the figure) about the pivot on a plane parallel to the subject placement surface of the top plate 1. , it is possible to eliminate the movement of the patient's head without imposing a burden on the patient with a crooked neck.

It goes without saying that the present invention is not limited to the embodiments described above, and can be implemented with modifications within the scope of the gist of the present invention.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to eliminate movement of the patient's head during imaging, and therefore it is possible to provide a head holding device for a CT apparatus that can perform excellent tomographic imaging.

[Brief explanation of drawings]

FIG. 1 to FIG. 3 are perspective views showing the state in which each member constituting the device of the present invention is attached.
Figure 1 shows an auxiliary fixing member attached to the headrest, Figure 2 shows an ear fixing member attached to the auxiliary fixing member, and Figure 3 shows a chin fixing member attached to the auxiliary fixing member. This is a diagram.
Fig. 4 is an explanatory diagram showing the fixing member of the headrest to be attached to the top plate, Fig. 5 is an explanatory diagram showing the bottom surface of the headrest to which the auxiliary fixing member is attached, and Fig. 6 is a perspective view of the auxiliary fixing member. , 7th
FIG. 8 is a perspective view showing the ear fixing member, and FIG. 8 is a sectional view showing an example of a catch fitting used in the jaw fixing member. FIGS. 9 and 10 are schematic explanatory diagrams showing how the apparatus of the present invention is used, and FIG. 11 is an explanatory diagram showing an example of an application of the apparatus of the present invention. 1... Top plate, 2... Head rest, 3... Auxiliary fixing member, 4... Ear fixing member, 5... Chin fixing member, 32... Upright piece, 47... Ear bar.

Claims (1)

[Claims] 1 In a head holder for a CT device that is attached to a top plate on which a subject is placed and holds the subject's head, there is a head rest that is removably attached to the top plate, and a head rest that is removably fixed to the head rest. In addition, an auxiliary fixing member having a pair of upright pieces installed on both sides of the subject's body axis, an ear bar to be inserted into the subject's ear hole, and an ear fixing plate to press the subject's ear from the outside are attached to the top plate. It is held so that it can be moved in the lateral direction of the
and an ear fixing member provided on each of the upright pieces and movably held along a plane parallel to the longitudinal direction of the top plate including the upright piece; and a jaw fixing member having a movable and adjustable support rod.
Head holding device for CT equipment.