PURPOSE To compare the dose distribution between carotid sparing intensity modulated radiotherapy (IMRT) and opposed lateral field technique (LAFT), and to determine the effects of carotid sparing IMRT in early glottic cancer patients who have risk factors for atherosclerosis. MATERIALS AND METHODS Ten early glottic cancer patients were treated with carotid sparing IMRT. For each patient, the...

Purpose: Motorized or dynamic wedge is routinely used nowadays to facilitate the work and reduce time on the treatment machine. However, this will necessitate keeping the Multileaf collimator (MLC) direction parallel to the chest wall. The aim of our work is to study the effect of Multileaf collimator in the perpendicular (┴) or parallel(//) direction on: target volume coverage, dose homogeneit...

BACKGROUND The purpose of the study was to analyse the dosimetric differences when using 10 MV instead of 6 MV for VMAT treatment plans for post-prostatectomy irradiation of the prostate bed. METHODS AND MATERIALS Ten post-prostatectomy prostate bed irradiation cases previously treated using 6 MV with volumetric modulated arc therapy (VMAT) were re-planned using 10 MV with VMAT. Prescription ...

Objective: Intensity modulated radiotherapy (IMRT) is an exciting new technique with the potential to improve radiotherapy treatment by reducing dose to normal structures and increasing dose to the cancer. The objective was to investigate the potential value of IMRT in the treatment of sarcoma. To compare normal tissue sparing and treatment volume coverage for both three dimensional conformal (...

Background: Purpose of the study is to evaluate field-in-field (FIF) and sliding-window intensity modulated radiation therapy (SW-IMRT) treatment plans in terms of homogeneity index (HI), conformity index (CI) and normal tissue doses for organs at risk (OAR) in patients with endometrial carcinoma along with deriving a new expression for CI. Materials and Methods: Four different FIF plans with d...

Background: The most commonly used indicator for dental caries level is the DMF-T index. index assessing health status due to in permanent teeth. was first by Henry Klein et al. sum of D/decay (dental caries), M/missing (missing teeth), and F/filling (caved teeth). Physical cognitive changes elderly resulted assessment corresponding. Materials Methods: This an analytic observational study, usin...

the augmented gravity model was employed to determine iran's trading model and agricultural export directions in the case of cross section analysis in 2005 for 64 countries which are considered as iran's main export market. besides, another explanatory variable named trade conformity index (tci) was added to the model. this index was employed to identify iran's trading model. als...

The objective was to evaluate the performance of a high-definition multileaf collimator (MLC) of 2.5 mm leaf width (MLC2.5) and compare to standard 5 mm leaf width MLC (MLC5) for the treatment of intracranial lesions using dynamic conformal arcs (DCA) technique with a dedicated radiosurgery linear accelerator. Simulated cases of spherical targets were created to study solely the effect of targe...