| Summary: | 碩士 === 中臺科技大學 === 醫學影像暨放射科學系暨研究所 === 107 === This study aimed at patients with breast cancer who need internal lymph node irradiation to explore the protective effects of the heart on different kinds of respiratory regulation techniques.
The experiment collected 30 patients with left breast cancer who had completed computed tomography.Ten different breathing control techniques were taken. Breathing control techniques include active, abdominal, and free breathing.
The prescribed dose is 200 cGy per fraction, 25 fractions, and a total dose of 5000 cGy.The study method was retrospectively redoing the treatment plan of 30 patients, and the results were statistically analyzed by ANOVA.
The results of the study showed that under total breast plus internal mammary lymph node irradiation,the average dose of the heart using active respiratory regulation was 223 ± 114 cGy, and the average dose of the heart regulated by abdominal compression was 770±261 cGy. Without respiratory regulation, the average dose of free-breathing heart was 666 ± 270 cGy.
The average dose of LAD using active respiratory regulation was 1204 ± 776 cGy, the average dose of LAD using respiratory control was 3314 ± 872 cGy, and the average dose of LAD without respiratory regulation was 2900 ± 1043 cGy. The V30Gy of the heart using active breathing was 1.03±1.13%, the V30Gy of the heart regulated by the abdominal device was 9.85±4.47%, and the heart V30Gy without respiratory regulation was 8.39±5.02%. Taken together, the results show that the use of ABC technology is better than the other two.
According to, the statistical part of active respiratory regulation, the average dose of the heart of all patients is less than 4 Gy. If patients who need to receive internal mammary lymph node irradiation, it is best to use active respiratory regulation for treatment to obtain the best protection. effect.
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