Respiratory guidance device and method applied in respiratory-gated ion beam irradiation

A respiratory guidance method applied in a respiratory-gated irradiation using ion beams, comprising:

• measuring respiratory motion trajectory curves during free breathing and deep breathing;
• calculating average respiratory periods and average respiratory amplitudes according to the respiratory motion trajectory curves, so as to establish respiratory guidance curves;
• and
• adjusting a magnet excitation cycle of a synchrotron according to a respiratory cycle reflected by one of the respiratory guidance curves during the free breathing or the deep breathing, so that the magnet excitation cycle of the synchrotron is synchronized with the respiratory cycle;
• wherein calculating the average respiratory periods and the average respiratory amplitudes according to the respiratory motion trajectory curves, so as to establish respiratory guidance curves comprises:
• according to the average respiratory amplitudes and the average respiratory periods, establishing a free breathing model or a deep breathing model on the basis of function curves;
• and
• establishing the respiratory guidance curves according to the free breathing model or the deep breathing model and preset breath-hold time.

A respiratory guidance device applied in a respiratory-gated irradiation using ion beams, comprising:

• a processor;
• and
• a memory for storing instructions executable by the processor;
• wherein the processor is configured to:
• measure respiratory motion trajectory curves during free breathing and deep breathing;
• calculate average respiratory periods and average respiratory amplitudes according to the respiratory motion trajectory curves, so as to establish respiratory guidance curves;
• and
• adjust a magnet excitation cycle of a synchrotron according to a respiratory cycle reflected by one of the respiratory guidance curves during the free breathing or the deep breathing, so that the magnet excitation cycle of the synchrotron is synchronized with the respiratory cycle;
• wherein the processor is configured to:
• according to the average respiratory amplitudes and the average respiratory periods, establish a free breathing model or a deep breathing model on the basis of function curves;
• and
• establish the respiratory guidance curves according to the free breathing model or the deep breathing model and preset breath-hold time.