Pneumatic piston radiotherapy bed surface

Abstract

A radiotherapy bed surface using a pneumatic piston creatively utilizes the movable pneumatic piston to form an outer contour recess of a patient, thereby replacing traditional vacuum pad and frame positioning, body frame and body membrane positioning and vacuum pad and body frame and body membrane positioning. The purposes of reducing the economic burden of the patient, reducing the area requirement of a machine room, reducing the positioning error and improving the positioning efficiency are achieved.

Description

technical field [0001] The invention relates to the field of radiotherapy, in particular to a pneumatic piston. Background technique [0002] Under the premise that radiotherapy increasingly emphasizes precise radiotherapy and high efficiency, the current vacuum pad plus frame positioning technology can reduce the axial error of the patient and help improve the positioning accuracy, but the volume of the vacuum pad is large, which has a certain impact on the area of ​​the machine room. requirements, and the use of personalized vacuum pads requires a certain amount of consumables to be charged to the patient, which increases the patient's burden. The personalized vacuum pad needs to be rummaged during positioning, which increases the length of positioning, and there is an increase in the placement of the wrong vacuum pad. Potential risk of positioning error, the patient's body shape changes will also change the body surface markings, thereby increasing the positioning error; ...

AI Technical Summary

Problems solved by technology

[0002] Under the premise that radiotherapy increasingly emphasizes precise radiotherapy and high efficiency, the current vacuum pad plus frame positioning technology can reduce the axial error of the patient and help improve the positioning accuracy, but the volume of the vacuum pad is large, which has a certain impact on the area of ​​the machine room. requirements, and the use of personalized vacuum pads requires a certain amount of consumables to be charged to the patient, which increases the patient's burden. The personalized vacuum pad needs to be rummaged during positioning, which increases the length of positioning, and there is an increase in the placement of the wrong vacuum pad. Potential risk of positioning error, the patient's body shape changes will also change the body surface markings, thereby increasing the positioning error; body frame plus body film positioning technology can improve the positioning efficiency, but the patient's body surface line needs to be positioned first, because there is no vacuum pad in this process Constraints, there will be large errors. The use of personalized body wraps requires a certain consumable fee for patients, which increases the financial burden of patients. Personalized body wraps need to be searched when setting up, which increases the time for setting up, and there are mistakes. The body membrane leads to the potential risk of increasing the setup error, and the change of the patient's body shape will also change the body surface marks, thereby increasing the setup error; the body frame plus the vacuum pad combined with the body membrane positioning can improve the setup accuracy, but there are common differences between the two. Disadvantages, even because of the use of two kinds of consumables, the burden on the area of ​​the machine room, patient economy, and positioning time is greater; in my patent "Electric Piston Radiation Therapy Table Top" (application number 2022101170574), a stepping motor is proposed. The treatment table surface controls the lifting and lowering of the piston, but the structure of the magnet and winding inside the motor will cause a large degree of metal artifacts, which will cause distortion when acquiring the positioning image, which is not conducive to the planning system to outline and calculate the dose; and during treatment, the accelerator When the head angle is between 90 and 270 degrees, the beam will pass through the stepping motor assembly, causing abnormal dose attenuation and affecting the treatment effect

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