作者: Stefan Wachter , Natascha Gerstner , Gregor Goldner , Regina Pötzi , Andre Wambersie
DOI: 10.1016/S0167-8140(01)00281-X
关键词: Prostate cancer 、 Dose-volume histogram 、 Predictive value of tests 、 Area under the curve 、 Colonoscopy 、 Radiation therapy 、 Nuclear medicine 、 Rectum 、 Medicine 、 Survival rate
摘要: Purpose: To identify clinically relevant parameters predictive of late rectal bleeding derived from cumulative dose-volume histograms (DVHs) the rectum after conformal radiotherapy prostate cancer. Materials and methods: One hundred nine patients treated with 3D between 1/1994 1/1996 for localized cancer (clinical stage T1-T3) were available analysis. All received a total dose 66 Gy/2 Gy per fraction (specified at International Commission on Radiation Units Measurements ICRU reference point). DVHs contoured analyzed by defining absolute (aV) relative (rV) volume that more than 30% (V-30), 50% (V-50), 70% (V-70) 80% (V-80), 90% (V-90) 100% (V-100) prescribed dose. Additionally, new aspect DVH analysis was investigated calculation area under DVH-curve several levels (area curve (AUC)-DVH). DVH-variables correlated radiation side effects evaluated in 3-6 months intervals graded according to EORTC/RTOG score. The median follow-up 30 (12-60 months). Results: Univariate multivariate stepwise Cox-Regression including age, PTV, size, rV(100), rV(90), rV(80), rV(70); rV(50) rV(30) aV(30), aV(100) calculated. Late (EORTC/RTOG grade 2) significantly percentage receiving greater or equal (rV(90)) (P = 0.007) inversely significant way size 0.006) In our series, proportion 57% included 90%-isodose (rV(90) 57%) one half patients, an actuarial incidence 31% 3 years. other when rV(90) < 57%, 3-year 11% 0.03). Conclusion: Our data demonstrate relationship 60 (similar dose) respect toxicity. seems be most useful easily obtained parameter comparing treatment plans evaluate risk morbidity. (C) 2001 Elsevier Science Ireland Ltd. rights reserved.