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To determine whether a 3-mm isotropic target margin adequately covers the prostate and seminal vesicles (SVs) during administration of an intensity-modulated radiation therapy (IMRT) treatment fraction, assuming that daily image-guided setup is performed just before each fraction.In-room computed tomographic (CT) scans were acquired immediately before and after a daily treatment fraction in 46 patients...
To quantify the internal motion margin requirements for radiotherapy of tumors near the gastroesophageal junction (GEJ).Four-dimensional computed tomography (4DCT) scans were obtained for 25 patients with primary tumors located near the GEJ. The gross tumor volume (GTV) was manually contoured on the exhale-phase image from the 4DCT image set. A deformable image registration method was used to automatically...
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