Appropriate margin for planning target volume for breast radiotherapy during deep inspiration breath-hold by variance component analysis

摘要

a The patient’s position in a breast immobilization device. The infrared marker was placed on the patient’s abdominal wall. b Representative RPM trace of the patient. The vertical axis represents the amplitude; the horizontal axis represents time. Dashed lines show the upper and lower gating thresholds with a maximum value. RPM, real-time position management; IR, infrared