نتایج جستجو برای: dose evaluation

تعداد نتایج: 1112594  

Introduction: Head scans are the most frequently performed computed tomography (CT) examinations worldwide. However, there is growing concern over the probability of increased cancer risks among the exposed populations. Diagnostic reference levels (DRLs) identify radiation dose that is not commensurate with clinical objectives. The aim of this study was to establish DR...

Journal: :iranian journal of medical physics 0
hamid reza sadoughi m.sc. student of medical physics, medical physics dept., tehran university of medical sciences, tehran, iran mahmood allahverdi associate professor, medical physics dept., tehran university of medical sciences, and radiotherapy physics department of cancer institute, tehran, iran hasan nedaei assistant professor, radiotherapy physics dept., cancer institute, tehran, iran ramin jaberi radiotherapy physicist, radiotherapy physics dept., cancer institute, tehran, iran mahbod esfahani radiotherapy physicist, radiotherapy physics dept., cancer institute, tehran, iran alireza shirazi associated professor, medical physics dept., tehran university of medical sciences, tehran, iran

introduction: multiple fields and presence of heterogeneities create complex dose distributions that need three dimensional dosimetry. in this work, we investigated mr-based magic gel dosimetry as a three-dimensional dosimetry technique to measure the delivered dose to bladder and rectum in prostate radiation therapy. materials and methods: a heterogeneous slab phantom including bones was made....

Journal: :iranian journal of radiology 0
zahra mahboubifooladi shahid beheshti university of medical sciences, tehran, iran; shahid beheshti university of medical sciences, tehran, iran hooman bahramimotlagh shahid beheshti university of medical sciences, tehran, iran

results the study consisted of 40 patients (all men, with mean age of 33.38 ± 7.4 years). ct evaluation with standard dose were positive in 22 patients (55%). only 1 (2.5%) ct scan assigned as unacceptable by each radiologist in low-dose group. noise average of low-dose protocol, was approximately 7 times greater than standard dose group, while dlp and ed are 9.7 times smaller. in comparison wi...

A. Mahmoudzadeh, H. Mozdarani, M. Foroghizadeh, S.A. Haeri,

Background: Lymphocyte-dicentric assay is the most generally accepted method for biological dosimetry of overexposed individuals. In this study, the frequency of unstable chromosome aberration in blood lymphocytes was used to estimate radiation dose received by individuals. Evaluation of dose using a calibration curve produced elsewhere may have a significant uncertainty therefore, experiments ...

محبی, نیایش, حاج حسین طلاساز , آزیتا , حسنی, ابراهیم , حسنی, اسماء , غلامی, خیراله ,

 Background & Aims: Drug utilization evaluation (DUE) is used to assess how a drug is prescribed and administered. We studied the use of enoxaparin, a low molecular weight heparin (LMWH) which is widely used in cardiovascular patients as prophylactic or curative treatment.  Materials & Methods: In a retrospective study, medical records of 322 patients admitted to the hospital for nine consecuti...

Journal: :JCR Journal of Clinical Rheumatology 2014

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