Design Analysis and Experimental Study of Robotic Chair for Proton Heavy Ion Radiotherapy

Table 1

The proton heavy ion radiotherapy work process.

Order number	Working principle decomposition diagram	Principle description
a		The proton heavy ion beam is accelerated by the accelerator and becomes a high-energy proton heavy ion beam.
b		High-energy proton heavy ion beams need to be expanded to cover the entire tumor site.
c		Select proton heavy ion beams of different energies for tumors of different depths.
d		The energy modulator is used to modulate the energy of the proton heavy ion beam, gradually increasing its energy and achieving fine treatment.
e		The beam collimator blocks the proton heavy ion beam directed to normal cells and avoids damage to normal cells.
f		The proton heavy ion beam needs to pass through a special compensator at the front of the skin to prevent damage to normal cells at the posterior edge of the tumor.
g		Introduce a precision positioning system to align the patient to the beam and avoid error irradiation.
h		In order to synchronize the proton heavy ion beam irradiation with the breathing and avoid the influence of breathing on the tumor size, it is necessary to equip a respiratory door control system.
i		A measurement and calibration system is required to ensure uniformity of the proton dose in the longitudinal and transverse directions.
j		A set of beam monitoring system is introduced to monitor whether the beam center, strength, and section distribution meet the requirements in real time.
k		The end of the proton heavy ion beam output needs to have a posture adjustment mechanism, and the treatment head is irradiated from different angles in order to obtain a good efficacy.