Beam-defining clipper, radiation imaging equipment and X-ray radiation field indicating method

Abstract

The invention discloses a beam-defining clipper, radiation imaging equipment and an X-ray radiation field indicating method. The beam-defining clipper, the radiation imaging equipment and the X-ray radiation field indicating method comprise an X-ray radiation field control device used form controlling a radiation field formed by X-rays on an indicating horizon, an anti-radiation shell component used for preventing the radiation leakage of the X-rays, a visible light source used for generating visible light, and a visible optical filed control device used for a visible optical field formed by the visible light on the indicating horizon. The anti-radiation shell component surrounds the areas passed by the X-rays, and the visible optical field and the radiation field are overlapped on the indicating horizon under the control of control and communication devices. The visible optical field control device and the X-ray radiation field control device respectively and independently control the shapes and the positions of the visible optical field and the X-ray radiation field, the position relation of the visible light source and an X-light source is not required, the position of the visible light source can be unadjustable, and therefore a structure is simplified, and meanwhile filtration evenness and the effect of preventing radiation leakage are improved.

Description

technical field [0001] The invention relates to a beam limiter, radiographic equipment and an X-ray radiation field indication method. Background technique [0002] The beam limiter, also known as the beam limiter, is a component in radiological imaging equipment, which is used to control and indicate the X-ray radiation field and prevent X-ray leakage. [0003] Such as figure 1 and figure 2 As shown, the beam limiter generally includes an X-ray tube component connecting device 1 , an X-ray radiation field control device 2 , a light field indicating device 3 , a radiation-proof shell component 4 and a control and communication module 5 . The beam limiter uses an X-ray radiation field control device to control the shape and position of the X-ray radiation field. The light field indicating device 3 uses visible light to simulate the shape and position of the X-ray radiation field, so as to realize the indication of the invisible X-ray radiation field. The light field indi...

AI Technical Summary

Problems solved by technology

[0006] 1) Complex structure, high production and maintenance requirements

The current beam limiter requires the visible light source and the X light source to be mutually imaged through the reflector. However, due to the inconsistency of production and assembly, the position of the visible light source and the reflector needs to be adjustable to meet this requirement. This aspect increases the adjustable structure The complexity of the process increases the precision requirements of processing and assembly. On the other hand, it also increases the factory test and commissioning process and on-site commissioning process, which also increases the risk in the transportation link. It also requires regular maintenance during the maintenance phase, which ultimately increases the processing cost. , design cost, production transportation cost and maintenance cost

[0007] 2) Difficulty in product miniaturization

Because the reflector is between the visible light source and the X-ray radiation field control device, and at a specific angle, there will be a specific distance between the visible light source and the reflector, and at the same time, the X-ray radiation field control device is located at the end far away from the X-ray source. The size and control stroke of the X-ray radiation field control device are also enlarged unnecessarily. General engineers and technicians know through simple analysis that the size of the beam limiter is limited by the scheme itself and cannot be further miniaturized, while the existing beam limiter Increased risk of hitting the patient in clinical applications due to larger size

[0008] 3) There are many hidden dangers of radiation leakage

Since the visible light irradiation area and the X-ray radiation area cannot be blocked by objects, the radiation-proof shell assembly of the existing beam limiter completely surrounds the two. The common solution is to splicing multiple pieces of heavy metal sheets, which is high in production cost and technically difficult. Large size, inconvenient assembly, disassembly and maintenance, and high risk of radiation leakage at the joint; at the same time, the light field indicator device of the existing beam limiter needs to be adjusted and maintained, resulting in an inevitable operation and maintenance port on the radiation shield assembly

The control and driving wires will also pass through the radiation shield assembly to form holes, which will inevitably cause radiation leakage

In addition, the mirror is located on the path of the X-ray radiation field, resulting in an increase in the amount of scattered X-ray radiation in unnecessary directions, further increasing the dose of radiation leakage

[0009] 4) High risk of filtration uniformity

In the existing beam limiter, the mirror is located in the X-ray radiation area. In addition to increasing the scattered rays of X-rays, the uniformity of the mirror brings risks to the filtering performance and image uniformity of the beam limiter. In other words , the material and uniformity requirements of the reflector are very high, and the cost also increases accordingly

[0010] 5) High power consumption, low thermal efficiency, regular replacement of consumables, complicated daily maintenance

Existing beam limiters mostly use thermal light sources, such as halogen lamps as visible light sources, which have low thermal efficiency (about 85% of electrical energy is converted into heat energy) and short lifespan (about 300 hours), resulting in high power consumption of existing beam limiters. The heat dissipation requirements are high, and the light source must be replaced regularly as a consumable, which further aggravates the structural complexity, increases the hidden danger of radiation leakage, increases maintenance costs, and reduces customer experience

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