PURPOSE Intensity modulated arc therapy (IMAT) is a form of intensity modulated radiation therapy (IMRT) that delivers dose in single or multiple arcs. We compared IMRT plans versus single-arc field (1ARC) and multi-arc fields (3ARC) IMAT plans in high-risk prostate cancer. MATERIALS AND METHODS Sixteen patients were studied. Prostate (PTV P ), right pelvic (PTV RtLN ) and left pelvic lymph n...

135 Background: To investigate whether patients treated for a localized prostate cancer require prior radical prostatectomy followed by postoperative radiotherapy or exclusive radiotherapy, in the modern era of image-guided IMRT. METHODS One hundred and seventy-eight patients with localized prostate cancer were referred for daily on-line exclusive image-guided IMRT (IG-IMRT), while 69 patient...

PurposeIntensity-modulated radiation therapy (IMRT) and laparoscopic or robotic minimally invasive radicalprostatectomy (MIRP) are costlier alternatives to three-dimensional conformal radiation therapy(3D-CRT) and open radical prostatectomy for treating prostate cancer. We assessed temporaltrends in their utilization and their impact on national health care spending.Methods<...

background: in order to improve the evaluation of possible rectal toxicity based on the rectal normal tissue complication probability (ntcp), we consider the fractional dependence of the ntcp on the wall thickness (tw) and rectal displacement (rm). materials and methods: the two-dimensional ntcp model (ntcp2d) was developed using radiotherapy plans of ten randomly selected patients with prostat...

background: the present work aims to study the out-of-field photon calculation accuracy of a commercial treatment planning system (tps), oncentra, for three-dimensional conformal radiotherapy (3d-crt) and intensity modulated radiation therapy (imrt) treatment techniques from elekta synergy medical linear accelerator. materials and methods: accuracy of individual out-of-field dose components was...

PURPOSE No direct comparisons between extreme hypofractionation and conventional fractionation have been reported in randomized trials for the treatment of localized prostate cancer. The goal of this study is to use a propensity score matched (PSM) analysis with the National Cancer Database (NCDB) for the comparison of stereotactic body radiation therapy (SBRT) and intensity modulated radiation...

Few oncologic entities are more deserving of national scrutiny than low-risk prostate cancer. Prostate cancer is among the top 5 most costly cancers, with $11.9 billion spent annually in the United States (1). Recent publications have drawn attention to financially driven practices and questionable referral patterns (2, 3). The Congressional Budget Office estimates that half the increase in hea...

Purpose: Combination of Prostate Seed Implant (PSI) with External Beam Radiation Therapy (EBRT) remains as an attractive option for patients with intermediate or high-risk prostate cancer. One of the most widely used approaches is to use external beam radiation therapy (EBRT) to deliver boost doses after permanent prostate seed implant (PSI). In this study, the feasibility of using Intensity Mo...

the aim of radiation therapy treatment planning is to achieve an optimal balance between delivering a high dose to target volume and a low dose to healthy tissues. in order to refrain any complications resulting from the dose to the surrounding normal organs, the role of treatment plan has been critically evaluated in term of how large the volume or mass of normal tissues exposed in the radiati...

CONTEXT There has been rapid adoption of newer radiation treatments such as intensity-modulated radiation therapy (IMRT) and proton therapy despite greater cost and limited demonstrated benefit compared with previous technologies. OBJECTIVE To determine the comparative morbidity and disease control of IMRT, proton therapy, and conformal radiation therapy for primary prostate cancer treatment....