An airbag bionic cradle bed for radiotherapy equipment

Abstract

A bionic airbag cradle bed used for radiotherapy equipment; at the bottom of the bed panel in the direction of the bed surface are arranged one or a plurality of airbags (2), a control switch (3) corresponding to the airbag, and a bidirectional air pump (4), said air pump (4) inflating or drawing air out of the airbag (2) according to respiratory frequency and phase, causing rising and lowering motion of the bionic airbag cradle bed. The cradle bed may additionally be provided with a synchronous multi-axis controller (900), said synchronous multi-axis controller (900) controlling, according to a respiratory gating signal, combined motor and airbag (2) motion to guide the bionic airbag cradle bed in synchronized cradle-like motion opposite to the direction of motion of the target area caused by respiration, thus controlling the patient's body in cradle-like motion opposite to the direction of respiratory motion and counteracting the displacement of the tumor target area and organs caused by respiratory motion, such that a dynamic target area in continuous periodic motion along with respiratory motion becomes a static target area which can be fixed at the isocenter.

Description

technical field [0001] The invention relates to an airbag bionic cradle bed used for radiotherapy equipment. The airbag bionic cradle bed can calculate the three-dimensional movement of the target area on the X, Y, and Z axes according to the amplitude and time phase of the breathing movement, and synchronize multiple The axis controller pulls the linear motor in the three-dimensional direction and the joint movement of the airbag inflator to control the patient's body to make a cradle-like movement in the opposite direction to the respiratory movement, offsetting the displacement of the tumor target area and organs caused by the respiratory movement, and to make a patient with breathing movement A dynamic target volume that moves periodically becomes a static target volume that can be fixed at the isocenter. Background technique [0002] The main problem faced by precise radiotherapy for thoracic and abdominal tumors is the off-target caused by tumor and organ displacement ...

AI Technical Summary

Problems solved by technology

The most advanced respiratory gating technology can only position the accelerator beam at a point on the trajectory of the tumor in space according to the monitoring of respiratory frequency and phase, and wait for the tumor to come out of the fixed space within one cycle of respiratory movement and immediately release the beam. Irradiate and turn off the machine after the tumor has passed, which is equivalent to giving an advance amount when shooting dynamically, so that the fired bullets hit the target in the target area, and continuous beam irradiation is impossible at all, turning the continuous attack of a machine gun into a single strike of a rifle

This method of capturing one or two points of irradiation in each cycle wastes more than 90% of the ray resources, so it is extremely inefficient, and the time and process of the tumor passing through this place in each cycle are very uncertain, so there are also problems in accuracy. , which is equivalent to the dynamic target area. The target is often easy to miss the target, while the static target area is easy to align.

However, there is currently no equipment and method in the world to turn a dynamic target area that moves with breathing into a static target area.

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