نتایج جستجو برای: three dimensional radiotherapy

تعداد نتایج: 1579223  

Journal: :iranian journal of radiology 0
abbas arjmand shabestari shahid beheshtiuniversity of medical sciences,tehran, iran robab anbiaee taraneh faghihi langroudi shahid beheshtiuniversity of medical sciences,tehran, iran hooman bakhshandeh shahid beheshtiuniversity of medical sciences,tehran, iran maryam heydari-sooreshjaany shahid beheshtiuniversity of medical sciences,tehran, iran

results no correlation between as and history of rt, rt-to-follow-up time interval, laterality of bc, framingham’s 10-year risk score or traditional cad risk factors were detected. increase in cacs related to the senile atherosclerotic process was shown (p < 0.001). conclusions no difference between cacs was noted between bc patients with a history of 3d-crt and the non-bc women without a histo...

Journal: :middle east journal of cancer 0
doaa ali sharaf eldeen clinical oncology and nuclear medicine department, faculty of medicine, mansoura university, mansoura, egypt eman abd elkareem toson clinical oncology and nuclear medicine department, faculty of medicine, mansoura university, mansoura, egypt maiy abd elraheem alshahat clinical oncology and nuclear medicine department, faculty of medicine, mansoura university, mansoura, egypt ahmed nageeb taha neurosurgery department, faculty of medicine, mansoura university. mansoura, egypt

background : this study determines the efficacy and tolerability of hypofraction- ated three-dimensional conformal radiotherapy in conjunction with daily temozolomide in treatment of previously irradiated recurrent malignant glioma. methods :we enrolled 21 patients diagnosed with recurrent or progressive malignant glioma who previously underwent external beam irradiation. all patients had hypof...

Journal: :Clinical oral implants research 2015
David Schneider Florian Schober Philipp Grohmann Christoph H F Hammerle Ronald E Jung

OBJECTIVE The aim of this in-vitro study was to compare the tolerance of surgical instruments in surgical guides produced by 3-D printing, without metal sleeves to a surgical guide with conventional metal sleeves from two different manufacturers. MATERIALS AND METHODS Lateral movements of drill tips caused by tolerance between the sleeve and drill key and between the drill key and the drill w...

2008
Patricia Lasserre Bryce Cutt James Moffat

An accurate detection of the radiation field is crucial to 3D conformal radiotherapy (3D-CRT). Automated techniques to detect the field edges on double exposure portal images have previously focused on thresholding techniques. In this paper, we present a new approach based on a curve propagation technique (the Fast Marching method) which proves to be more effective at detecting the radiation fi...

Journal: :International journal of radiation oncology, biology, physics 2012
Katsuyuki Sakanaka Takashi Mizowaki Masahiro Hiraoka

PURPOSE To investigate the dosimetric advantage of intensity-modulated radiotherapy (IMRT) for whole ventricles (WV) in patients with a localized intracranial germinoma receiving induction chemotherapy. METHODS AND MATERIALS Data from 12 consecutive patients with localized intracranial germinomas who received induction chemotherapy and radiotherapy were used. Four-field coplanar three-dimensi...

2017
Dandan Xu Guowen Li Hongfei Li Fei Jia

BACKGROUND Esophageal cancer (EC) is a common cancer with high mortality because of its rapid progression and poor prognosis. Radiotherapy is one of the most effective treatments for EC. Three-dimensional conformal radiotherapy (3D-CRT) and intensity-modulated radiotherapy (IMRT) are 2 recently developed radiotherapy techniques. IMRT is believed to be more effective than 3D-CRT in target covera...

2017
Daichi Takizawa Masashi Mizumoto Tetsuya Yamamoto Yoshiko Oshiro Hiroko Fukushima Takashi Fukushima Toshiyuki Terunuma Toshiyuki Okumura Koji Tsuboi Hideyuki Sakurai

INTRODUCTION It was reported that proton beam therapy (PBT) reduced the normal brain dose compared with X-ray therapy for pediatric brain tumors. We considered whether there was not the condition that PBT was more disadvantageous than intensity modulated photon radiotherapy (IMRT) and 3D conventional radiotherapy (3D-CRT) for treatment of pediatric brain tumors about the dose reduction for the ...

2012
Magdalena Peszynska-Piorun Julian Malicki Wojciech Golusinski

BACKGROUND.: Treatment planning for head and neck (H&N) cancer is complex due to the number of organs at risk (OAR) located near the planning treatment volume (PTV). Distant OAR must also be taken into consideration. Intensity-modulated radiotherapy (IMRT) and three-dimensional conformal radiotherapy (3D-CRT) are both common H&N treatment techniques with very different planning approaches. Alth...

2014
Volker Rudat Alaa Nour Abdul Aziz Alaradi Adel Mohamed Saleh Altuwaijri

PURPOSE The purpose of this study was to compare the surface dose of 7-field IMRT (7 F-IMRT), tangential beam IMRT (TB-IMRT), and tangential beam 3D-CRT (3D-CRT) of breast cancer patients receiving adjuvant radiotherapy by means of in vivo GafChromic film dosimetry. MATERIAL AND METHODS Breast cancer patients receiving adjuvant radiotherapy of the whole breast or the chest wall were eligible ...

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