JP2629306B2 - X-ray fluoroscope - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to an X-ray fluoroscopic apparatus, and more particularly to an X-ray fluoroscopic apparatus that performs chest imaging (leader imaging) using an X-ray tube of an X-ray fluoroscopic apparatus. About.

[Conventional technology]

The X-ray fluoroscopy apparatus is an apparatus that enables X-ray fluoroscopy by a television system and photographing by a film, and a table body 62 having a top plate 61 for supporting a subject is mounted on a base 63 as shown in FIG. An X-ray tube 65 supported rotatably and vertically and having a collimator 64 above the top plate 61 (right side in the figure) and an image tube 66 as an image receiving mechanism below the top plate 62 (left side in the diagram) are X-ray tubes. The X-ray emission axis O from the tube 65 is attached to the table body 62 via a support arm 67 so that the center of the input surface 66 'of the image tube 66 coincides with the X-ray tube 65. The tube 66 is configured to be able to move integrally with the top plate 61 in the longitudinal axis direction (vertical direction indicated by an arrow in the figure). Reference numeral 68 denotes a television camera connected to the output unit of the image tube 66, and reference numeral 69 denotes a rapid shooting mechanism which moves from a position shown in the drawing to a front surface of the image tube 66 when taking a picture.

FIGS. 7 and 8 show a conventional system in which reader imaging is performed using the X-ray tube 65 of the X-ray fluoroscopic apparatus having the above configuration.

FIG. 7 shows a case where a separate reader imaging table is used. The X-ray tube 65 held by the support arm 67 is rotated clockwise to a position shown by a solid line, and the X-ray emission axis O from that position is rotated. ′
A leader photographing table 71 for holding a cassette 70 accommodating a photographing film is arranged thereon to perform leader photographing. FIG. 8 shows a cassette holder 72 for accommodating a cassette 70 for accommodating a photographic film at a position facing the X-ray tube 65 on the front surface of the top plate 61, and is detachably attached to a support arm 67 via an attachment member 73. Then, the X-ray tube 65 is moved from a dotted line position to a position suitable for reader imaging indicated by a solid line to perform imaging. (No. 54-41664)
In this case, when the cassette holder is mounted, the center of the cassette holder coincides with the X-ray radiation axis O. In the drawing, P is a subject.

[Problems to be solved by the invention]

In the configuration shown in FIG. 7, the X-ray tube 65 of the X-ray fluoroscopic apparatus is used.
Since the cassette 70 and the cassette 70 are provided independently of each other, it is extremely necessary to align the X-ray emission axis O 'with the center of the cassette 70 and to position the cassette 70 orthogonal to the X-ray emission axis O'. It is difficult, and the position of the X-ray tube 65 and the cassette 70 must be adjusted in accordance with the physique and posture of the subject P. Therefore, complicated work is required, and the center of the X-ray radiation axis O 'and the cassette 70 is required. It takes a long time.

In addition, a separate installation space for the reader imaging stand 71 is required at the time of leader imaging, and a separate storage space for the reader imaging stand 70 is required when leader imaging is not performed, and the effective use of the imaging room cannot be achieved. There was a problem.

In the configuration shown in FIG. 8, since the center of the cassette 70 mounted on the support arm 67 always coincides with the X-ray radiation axis O,
Although there is no problem of the alignment as shown in FIG. 7, there is a problem that a space for storing the cassette holder 72 is required when the reader photographing is not performed.

In view of the above, the present invention does not require alignment between the X-ray radiation axis and the center of the cassette, and allows the cassette holder for housing the film for imaging to be stored in the table body when the reader imaging is not necessary. It is intended to provide a device.

[Means for solving the problem]

According to the present invention, an X-ray tube and an image receiving mechanism are disposed opposite to each other with a top plate interposed therebetween, and the X-ray tube is positioned at a second position when reader imaging is performed from a first position facing the image receiving mechanism. In the X-ray fluoroscopic apparatus which can be rotated to change the X-ray emission axis, a cassette holder for accommodating a film for photographing is provided, and the cassette holder is attached to the image receiving mechanism via holding means, and the cassette holder is attached to the cassette holder. An X-ray incident surface is orthogonal to an X-ray radiation axis from the second position, and is foldable and expandable to a reader imaging position and an X-ray incident surface to a storage position located on a side surface of the image receiving mechanism. .

The holding means is a rotating member which rotatably holds the cassette holder at one end and the other end of which is connected to the image receiving mechanism.

[Action]

When the X-ray tube is at the first position, the X-ray emission axis from the tube coincides with the center of the image receiving surface of the image receiving mechanism, and fluoroscopic imaging by the X-ray fluoroscopic apparatus can be performed. At this time, since the cassette holder is unnecessary, the X-ray incidence surface is folded to the storage position located on the side surface of the image receiving mechanism.

The X-ray tube is rotated to the second position, and the cassette is expanded from the folded storage position to the reader imaging position to perform reader imaging.

Since the cassette holder is attached to the image receiving mechanism arranged opposite to the X-ray tube via the holding means, by expanding the cassette holder to the reader imaging position, the X-ray emission axis at the second position and the center of the cassette are aligned. The cassette holder is positioned such that its X-ray incidence plane is orthogonal to the X-ray emission axis.

〔Example〕

FIG. 1 shows an X-ray fluoroscopic apparatus 1 according to an embodiment of the present invention.
FIG. 2 is an exploded perspective view for explaining a mounting structure of a cassette holder for photographing a reader, and FIG.
FIG. 3 is a partially enlarged view of the X-ray fluoroscopic apparatus 1 as viewed from a section line III-III in the figure. Hereinafter, with reference to FIGS. 1 to 3, X
The configuration of the fluoroscopic apparatus 1 will be described.

Numeral 2 denotes an X-ray tube provided with a collimator 6 attached to the tip of a support arm 5 supported on a table body 4 having a top plate 3. The X-ray tube 2 has a first position indicated by a two-dot chain line in the figure. The support arm 5 is rotatably held at a second position indicated by a solid line rotated counterclockwise by θ.

Numeral 7 is located below the top plate 3, the X-ray emission axis O when the X-ray tube 2 is set at the first position coincides with the center of the image receiving surface 7 ', and An image tube (image receiving mechanism) fixed to the table main body 4 so as to face directly, 8 is a TV camera fixed to an output portion of the image tube 7, and 9 is an image tube 7
Is a rectangular cylindrical support frame fixed to the table main body 4 so as to surround the support frame, 10 is a rotating member fixed to the support frame 9 via hinges 11a and 11b, and the rotating member 10 is a side plate 10 ₁ , 10 ₂ and an upper plate 10 ₃ connecting the side plates 10 ₁ and 10 ₂ , the hinges 11 a and 11 b are fixed to one end of the upper plate 10 ₃ , and the other end is connected to hinges 12 a and 12 b. A cassette holder 14 for holding a cassette 13 containing a film for photographing is fixed. The cassette 13 is inserted from the side of the cassette holder 14 as shown in FIG. 1, and is fixed at a predetermined position in the cassette holder 14. Also on the top of the cassette holder 14 is chin rest 14 ₁ of the subject P are provided.

14 _A, 14 _B is a collapsed storage position of the side of the cassette holder 14 is an image tube 7, in order to hold expanded in the X-ray tube rotates in a second position directly facing the reader photographing position, said support A lock mechanism for defining a rotation position of the rotation member 10 with respect to the frame 9 will be described with reference to FIGS. 3 and 4. FIG. Incidentally, the locking mechanism 14 _A and 14 _B will be described one component are the same configuration.

15a the distal end is inserted into the insertion hole formed in the side plates 10 ₁ of the rotating member 10 in the locking pin handle 16a is fixed to the other end which is tapered, biased in Figure 4 downward by a spring 17 Have been.

Reference numerals 18a and 19a denote lock guides having a periphery formed in a taper shape and a concave portion 20 in the center portion into which a tapered portion of the lock pin 15a is fitted. The lock guide is fixed to the support frame 9, and is locked by the lock pin and the lock guide. Make up the mechanism.

The lock guides 18a and 19a are pivot members on the support frame 9.
A pivoting member 10 is provided to keep the cassette holder 14 in two positions, the retracted position and the deployed position, on a circumferential orbit drawn by the lock pin 15a when the hinge 10 rotates about the center axis of the hinges 11a and 11b. Is fixed at a position that defines the rotation position of the. The lock guides 18a and 18b engage with the lock pins 15a and 15b to define the position of the rotating member 10 when the cassette holder 14 is deployed, and the lock guides 19a and 19b are used to lock the lock pins 15a and 15b.
To define the position of the rotating member 10 when the cassette holder 14 is stored.

Next, a case in which leader radiography is performed by the X-ray fluoroscopic apparatus having the above configuration will be described. In addition, lock pin
Assume that the cassette holders 15a and 15b are fitted into the recesses 20 of the lock guides 19a and 19b, and the cassette holder 14 is in the retracted state shown in FIG.

Pull the handles 16a and 16b against the spring 17 and lock the pin 1
When the support frames 9 are rotated counterclockwise as indicated by arrows A in FIG. 5 when the support frame 9 is rotated about the hinges 10a and 10b, the lock pins 15a and 15b are locked by the lock guides 18a. , 18b, and the rotating member 10 is locked at a position for holding the cassette holder 14 at the reader photographing position. In this state, when the cassette holder 13 is rotated in the clockwise direction indicated by the arrow B in FIG. 5 around the hinges 12a and 12b, the cassette holder 14 is deployed to the reader photographing position as shown in FIG. Reference numeral 21 denotes a lock mechanism that locks the cassette holder 14 to the rotating member 10 in a deployed state as shown in FIG.

Next, the X-ray tube 2 held by the support arm 5 is moved to the first position indicated by the two-dot chain line in FIG.
Is rotated counterclockwise from the position (1) to the second position indicated by the solid line, and X-rays are emitted from the X-ray tube 2, so that a chest image of the subject P located in front of the cassette holder 14 can be taken. .

In this case, when the X-ray tube 2 is at the first position shown by the two-dot chain line in FIG. 1, the cassette holder 14 is positioned such that the X-ray emission axis O and the center of the light receiving surface 7 'of the image tube 7 at that time. As shown in FIG. 1, when the cassette holder 14 is unfolded, the X-ray emission axis O 'and the cassette holder 14
That is, the center of the cassette 13 held therein is coincident, and the X-ray emission axis O 'is orthogonal to the X-ray incident surface 14' of the cassette holder 14.

On the other hand, in order to perform fluoroscopic imaging by the X-ray fluoroscopic apparatus from the reader imaging shown in FIG. 1, the cassette holder 14 and the rotating member 10 are rotated in the opposite direction to the cassette holder.
14 is folded to the storage state shown in FIG.

That is, the handles 16a and 16b are operated to lock the lock pins 15a and 15b.
From the recesses 20 of the lock guides 18a and 18b, and
Is rotated clockwise as indicated by arrow c in FIG. 1, the lock pins 15a and 15b fit into the recesses 20 of the lock guides 19a and 19b,
The rotating member 10 is locked at a position for holding the cassette holder 14 in the storage position.

Rotation of the cassette holder 14 to release the lock by the lock mechanism 21 until it abuts against the top plate 10 ₃ in the counterclockwise direction in Fig. 1 arrow D in this state, the cassette holder 1
The magnet 22 fixed to 4 and the magnet 2 fixed to the side of the support frame 7
And the cassette holder 14 has its entrance surface 14 '
Are stored in the state shown in FIG. 5 located on the side of the image tube 7.

Next, the X-ray tube 2 is rotated clockwise by θ from the second position shown by the solid line in FIG. 1 to be positioned at the first position shown by the two-dot chain line where the X-ray emission axis becomes 0, whereby X Fluoroscopy using a fluoroscopy apparatus can be performed.

In the embodiment, the rotating member 10 is attached to the support frame 9 via the hinges 11a and 11b. However, the rotating member 10 can be attached directly to the image tube 7.

Further, the support arm 5 of the X-ray fluoroscopic apparatus 1 can be displaced in the longitudinal direction of the top plate 3 (a direction perpendicular to the paper surface of FIG. 1) by a driving device (not shown). Can be rotated to any vertical position. In this case, it is dangerous to displace or rotate the top plate 3 in a state where the cassette holder 14 is unfolded at the reader photographing position shown in FIG. 1, so that a push switch is provided near the magnet 23 and the cassette holder 14 The top plate 3 can be displaced or rotated only when pushed, that is, only when the cassette holder 14 is stored in the side of the image tube 7 as shown in FIG. This will increase the safety of the device.

〔The invention's effect〕

As described above, according to the present invention, since the cassette holder for reader imaging is foldably attached to the image receiving mechanism facing the X-ray tube with the top plate interposed therebetween by the holding means, it is possible to expand the cassette holder by expanding the cassette holder. Reader imaging can be performed quickly, and there is no need to align the X-ray emission axis with the center of the cassette.

Also, when the reader is not being photographed, the cassette holder can be stored in the table body, eliminating the need for storage space for the cassette holder. Operability at the time of imaging is improved.

Since the cassette holder is held by the image receiving mechanism by the holding means, the lower portion of the cassette holder is open at the time of reader imaging, so that, for example, reader imaging can be performed with a physically handicapped person in a wheelchair.

[Brief description of the drawings]

FIG. 1 is a plan view of an X-ray fluoroscopic apparatus 1 according to one embodiment of the present invention, FIG. 2 is a leader radiographic view, an exploded perspective view for explaining a mounting structure of a cassette holder 3, and FIG. FIG. 4 is a partially enlarged view of the X-ray fluoroscopic apparatus 1 as viewed from a section line III-III in FIG. 4, FIG. 4 is a sectional view taken along a section line IV-IV in FIG. 1, and FIG. , FIG. 6 is a side view showing the configuration of a conventional X-ray fluoroscopic apparatus, FIG. 7 and FIG. It is a top view which shows the structure of the reader imaging | photography system by the apparatus of the figure. DESCRIPTION OF SYMBOLS 1 ... X-ray fluoroscopy apparatus, 2 ... Support arm 3 ... X-ray generating source, 9 ... Quick-shooting part 19 ... Swinging member, 20a, 20b, 21a, 21b ... Hinge 22 ... Support member, 27a, 27b …… Lock pin 28a, 28b, 29a, 29b …… Lock guide 30 …… Lock mechanism

Claims (1)

(57) [Claims] An X-ray tube and an image receiving mechanism are provided opposite to each other with a top plate interposed therebetween, and an X-ray emission axis O of the X-ray tube is orthogonal to an image receiving surface of the image receiving mechanism. In an X-ray fluoroscopic apparatus which is rotatable between a first position and a second position for reader imaging, a cassette holder for holding a cassette for accommodating a film for photographing is provided, and the cassette holder is inserted into the X-ray incidence thereof. The plane is X from the second rotational position.
Holding means for holding the X-ray incident surface perpendicular to the X-ray radiation axis O 'and a storage position where the X-ray incident surface is located on the side of the image receiving mechanism so as to be foldable and expandable, and the holding means is provided at one end with the cassette holder. Wherein the other end is a rotating member directly or indirectly rotatably connected to the image receiving mechanism.