|کد مقاله||کد نشریه||سال انتشار||مقاله انگلیسی||ترجمه فارسی||نسخه تمام متن|
|5529838||1401708||2017||6 صفحه PDF||سفارش دهید||دانلود کنید|
PurposeTo demonstrate the feasibility and to evaluate the tumour control probability (TCP) and normal tissue complication probability (NTCP) of IMRT dose painting using 68Ga-HBED-CC PSMA PET/CT for target delineation in prostate cancer (PCa).Methods and materials10 patients had PSMA PET/CT scans prior to prostatectomy. GTV-PET was generated on the basis of an intraprostatic SUVmax of 30%. Two IMRT plans were generated for each patient: Plan77 which consisted of whole-prostate IMRT to 77Â Gy, and Plan95 which consisted of whole-prostate IMRT to 77Â Gy and a simultaneous integrated boost to the GTV-PET up to 95Â Gy (35 fractions). The feasibility of these plans was judged by their ability to adhere to the FLAME trial protocol. TCP-histo/-PET were calculated on co-registered histology (GTV-histo) and GTV-PET, respectively. NTCPs for rectum and bladder were calculated.ResultsAll plans reached prescription doses whilst adhering to dose constraints. In Plan77 and Plan95 mean doses in GTV-histo were 75.8Â Â±Â 0.3Â Gy and 96.9Â Â±Â 1Â Gy, respectively. Average TCP-histo values for Plan77 and Plan95 were 70% (range: 15-97%), and 96% (range: 78-100%, pÂ <Â 0.0001). Average TCP-PET values for Plan77 and Plan95 were 55% (range: 27-82%), and 100% (range: 99-100%, pÂ <Â 0.0001). There was no significant difference between TCP-PET and TCP-histo in Plan95 (pÂ =Â 0.25). There were no significant differences in rectal (pÂ =Â 0.563) and bladder (pÂ =Â 0.3) NTCPs.ConclusionsIMRT dose painting using PSMA PET/CT was technically feasible and resulted in significantly higher TCPs without higher NTCPs.
Journal: Radiotherapy and Oncology - Volume 123, Issue 3, June 2017, Pages 472-477