JPS5850733B2 - X-ray device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Synthetic materials based on epoxide synthetic resins whose mechanical strength is considerably increased by the addition of carbon fiber materials are known.

The use of this new synthetic material is described in a manual (No. A27 B/1971) of the Composite Materials Division of Fothergill and Harvey, Little Barrow, Lancashire, UK.
Due to the weight savings, resistance to chemical attack and low coefficient of friction, it is particularly useful in aircraft fuselages, exercise equipment, prosthetic limbs, rotating parts of centrifuges, rotor blades, vessels, ship parts, self-lubricating bearings and tools, etc. The uses are shown.

The present invention was discovered as a result of various experiments.

The purpose of the present invention is to apply the new and extremely excellent properties of casting resin reinforced with carbon fiber material to X-ray equipment. At the same time, the part of the patient lying board that is transparent to X-rays, the lid plate of the X-ray intensifier tube facing the X-ray source, the side of the case of the X-ray aiming device facing the X-ray source, and the X-ray source of the X-ray film cassette. The side facing towards is made of cast resin reinforced with carbon fiber material.

In other words, it has been found that a casting resin reinforced with carbon fiber material absorbs X-rays or gamma rays less than the first power of 10 than aluminum at a given strength.

For example, a plate made of epoxide casting resin with a thickness of 2.5 plates reinforced with carbon fiber material corresponds to an aluminum plate with a thickness of 0.2 plate.

The tensile strength per square centimeter of this synthetic material is approximately twice that of aluminum.

The extremely low absorption of X-rays or gamma rays by structural elements made of cast resin reinforced with multi-dimensional fiber material means that their high mechanical strength allows for thin wall thicknesses. That alone cannot be explained.

It is the particularly low density of the synthetic material and the relatively low atomic numbers of all the elements used that contribute to multiplying the above effects.

Furthermore, experimental results have shown that the amount of scattered radiation induced due to the low atomic number of the elements contained in the composite material according to the invention is particularly low.

When a cast resin reinforced with carbon fiber material is used in an X-ray device, all the properties of this synthetic material complement each other, resulting in extremely excellent properties.

Epoxide resins are advantageously used to embed carbon fiber materials, which play a role in particular in terms of mechanical and electrical properties.

Therefore, instead of the epoxide casting resin, other casting resins may be used as long as they cure sufficiently.

At the patient table of an X-ray machine, the X-rays must be weakened as little as possible.

Furthermore, the scattered radiation reduces the brightness of the image layer and thus reduces the distinguishability of details, so its occurrence is undesirable in terms of X-ray diagnosis.

Scattered radiation is also undesirable because it changes the dose distribution in the treatment area in radiation therapy.

In this respect, the present invention is extremely suitable for use on patient tables since there is little scattering.

According to an advantageous development of the invention, a synthetic material can be used for the lying surface which is stretched between the longitudinal beams of the patient lying board.

The mechanical strength of this synthetic material is particularly suitable for withstanding forces applied to such a recumbent surface.

This is particularly the case in an advantageous embodiment of the invention in which the lying surface is curved in the region of the longitudinal beam.

Such curving of the recumbent surface reduces bending stresses.

Owing to the particularly high tensile strength of this synthetic material, particularly thin and sufficiently strong lying surfaces can be produced.

An advantageous development of the invention is to provide the longitudinal edges of the recumbent surface with a raised thickness so that they can be clamped into grooves provided in the longitudinal beams of the patient recumbent plate.

When the recumbent surface is created in this way, the holding force can be uniformly distributed on the longitudinal beam.

Furthermore, there is no need to provide holes that are required when tightening screws on the recumbent surface.

This is particularly important since such perforations cause local separation of the carbon fiber material, thus significantly reducing the strength at the anchoring point.

According to a particularly advantageous embodiment of the invention, this synthetic material can be used as a covering layer that is adhered above and below the core of the rigid porous body of the patient support plate, which is assembled as a kind of sandwich board.

Such a configuration of the patient support plate is particularly favorable for the properties of this synthetic material in terms of adhesion to the rigid porous core and tensile strength.

The strength of a patient bed assembled like a sand inch board can be further increased if the invention is further developed by connecting the upper and lower covering layers to each other at least on the longitudinal sides of the patient support board.

Next, embodiments of the present invention will be described with reference to the drawings.

1 is a perspective view of an X-ray device with a patient table and an X-ray intensifier tube; FIG. 2 is a perspective view of a patient lying board that can be rotated about its longitudinal axis; and FIG. 3 has a porous core. FIG. 4 is a perspective view of an X-ray examination apparatus having an X-ray aiming device, and FIG. 5 is a perspective view of an X-ray film cassette.

FIG. 1 shows an X-ray device that is preferably used for medical diagnosis.

Above the patient bed 1, which has a two-dimensionally movable patient lying board 4 placed on two support legs 2 and 3, an X-ray tube 5 is mounted on a pedestal 6 that can be moved along the patient bed. installed.

In this X-ray machine, case 7 can be moved under the patient's lying board.
An X-ray intensifier tube housed inside is used as an imaging device.

The patient lying board has two longitudinal beams 8, 9, on which are
Crosspiece 12 with grooves 10° 11 for fixing accessories.
13 is attached with screws.

On the opposite sides of the longitudinal beam and the groove column belonging thereto, there is in each case one notch 14, 15 in the longitudinal direction of the longitudinal beam,
A raised thickened part 16.1 of the edge of the recumbent surface 18 into which
7 is tightened.

A recumbent surface made entirely of epoxide plastic reinforced with carbon fiber material is easily stretched between the longitudinal beams.

The side of the X-ray intensifier tube case facing the X-ray tube 5 is also covered with a lid plate 19 made of epoxide synthetic resin reinforced with carbon fiber material.
is provided.

Epoxide synthetic resin reinforced with carbon fiber material exhibits a tensile strength comparable to that of steel.

When the recumbent surface 18 is stretched between two longitudinal beams 8 and 9, especially if the recumbent surface is slightly bent downward, the synthetic material will actually experience tensile stress when the load of the patient placed on it is applied. It just adds to it.

At the same time, this curvature also makes it suitable for the anatomy of the patient's body.

If the tensile force at the longitudinal edge of the lying surface 18 is evenly transmitted by the raised structure and the tension between the beam and its associated crosspiece, the wall thickness can be further reduced, and the X of the material Combined with the fact that radiation absorption is originally extremely small, X-ray absorption can be further reduced.

Concomitantly with the reduction in X-ray absorption, the scattered radiation occurring in the material of the lying surface is further reduced.

The side of the X-ray intensifier tube case facing the X-ray tube is made of epoxide resin reinforced with carbon fiber material, giving it the strength required for strength reasons, for example, in the case of steel. The lowest X-ray absorption and scattering compared to conventional constructions can be obtained using only a wall thickness of .

FIG. 2 shows a patient support plate constructed as a rotary sled 20 and supported on its bearing 22 so as to be able to swing about a longitudinal axis 21. FIG.

It can be attached later to the beams 12, 13 of the X-ray device shown in FIG. 1 by means of fixing screws 23, 24.

The curved shape of the sled body 25 not only provides lateral support to the patient in the rocking position, but also provides stability in shape.

If the curvature of the sled body continues without any cuts up to the leg plate, the strength of the sled body is increased in the area of the leg plate 26, which is made as a support for the bearing (not shown).

The use of epoxide resin reinforced with carbon fiber material creates a rotating sled with extremely low X-ray absorption.

FIG. 3 shows a partially cutaway view of a composite patient support plate 27 in which the space between the upper and lower covering layers 28, 29 is filled with a rigid porous material 30.

The upper and lower covering layers are connected to each other to the longitudinal edges of the patient support plate, which has an approximately triangular cross section.

A core of rigid porous material is bonded to both cladding layers.

This configuration of the patient recumbent plate results in an object that is extremely difficult to deform;
It exhibits very low X-ray absorption as a result of the use of rigid porous materials and the high tensile strength of the top and bottom extremely thin coatings made of epoxide resin reinforced with carbon fiber material.

This is equally advantageous for X-ray diagnosis and radiotherapy, and also for X-rays and gamma rays from radioisotopes.

FIG. 4 shows a conventional X-ray examination apparatus 31, in which an X-ray tube 33 is mounted on one side of a tiltable patient lying board 32, and an X-ray aiming device 34 is movable on the other side. It is provided.

The side of the X-ray aiming device 34 facing the patient's bed faces a phosphor plate (not shown) in the case wall of the X-ray aiming device, which is provided in the aiming device, and thus faces the X-ray source. The part 35 exposed to X-rays is made of a plate made of epoxide resin reinforced with carbon fiber material.

The X-ray absorption caused by the covering on the rear side of the aiming device is thus significantly reduced compared to conventional construction styles.

Figure 5 shows two foldable halves 37.38
An X-ray film cassette 36 is shown.

The half 38, which faces the X-ray source and is indicated by a cross, is made of epoxide resin reinforced with carbon fiber material.

Such X-ray film cassettes exhibit fundamentally advantageous transmission properties for the same mechanical strength as conventionally made cassettes.

[Brief explanation of the drawing]

1 to 5 show different embodiments of the present invention, in which FIG. 1 is a perspective view of an X-ray device, FIG. 2 is a perspective view of a patient lying board, and FIG. 3 is a partially cut away perspective view of the patient lying board. 4 is a perspective view of the X-ray inspection apparatus, and FIG. 5 is a perspective view of the X-ray film cassette. 4.27,32... Patient lying board, 5,33...
...X-ray tube, 7...X-ray intensifier tube case,
19... Case lid plate, 20... Rotating sled body, 34... X-ray aiming device, 35...
...X-ray source side part of the case of the X-ray aiming device, 36...
...Film cassette.

Claims (1)

[Claims] 1 parts of the patient recumbent plate that are mechanically loaded and at the same time transparent to An X-ray device characterized in that the side of the X-ray film cassette facing the X-ray source is each constructed of cast resin reinforced with carbon fiber material.