A Newly Developed Simple and Accurate Respiratory Indicator Relative to Measurement of 2-Point Levels of Abdominal and Chest Walls: for Assurance of Patient Self-Judged Breath Holding Techniques for Irradiation of Lung Cancer with Small Internal Margin

Abstract

Purpose/Objective: We have utilized the technique of patient self-breath-holding without respiratory monitoring devices for irradiation of lung cancer with small internal margin. However, some patients were not good at understanding and performing the self-breath-holding technique precisely. This study was designed to develop a simple and novel mode of respiratory monitor according to measurement of 2-point levels of abdominal and chest walls for the breath holding technique, and to evaluate its accuracy for the reproducibility of the tumor position.