نتایج جستجو برای: low dose pre
تعداد نتایج: 1712576 فیلتر نتایج به سال:
Evaluation of the effect of prostate volume change on tumor control probability in LDR brachytherapy
PURPOSE This study evaluates low dose-rate brachytherapy (LDR) prostate plans to determine the biological effect of dose degradation due to prostate volume changes. MATERIAL AND METHODS In this study, 39 patients were evaluated. Pre-implant prostate volume was determined using ultrasound. These images were used with the treatment planning system (Nucletron Spot Pro 3.1(®)) to create treatment...
The Earth was highly radioactive four billion years ago when life emerged. Even today, all humans are bombarded by 20,000 radiation strikes each second. Although high doses hazardous, organisms have evolved not only to tolerate lower-dose but also benefit it (hormesis). Hormesis is prevailing in species various respects. An example that hibakusha (Japanese A-bomb survivors) longer lifespans and...
OBJECTIVE Patients undergoing transapical aortic valve implantation (TA-AVI) are usually over 80 years old and have a high prevalence of chronic kidney disease. However, transcatheter valve therapies require the use of contrast injections with the risk of nephrotoxicity. The aim of this study was to evaluate post-operative kidney function and survival in patients with pre-existing renal impairm...
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