background: in vivo dosimetry is a method for estimation of overall error in the delivered dose to the patients at the end of radiotherapy process. in this research, two methods for target dose calculation were evaluated on midline and central axis of photon beams in in vivo dosimetry of thorax fields. materials and methods: entrance and exit doses for anterior and lateral fields of thorax were...

Undesired radiation exposure to caregivers is an important problem in radioiodine therapy in thyroid carcinoma patients, especially when patient is non-ambulatory. Special precautions are needed to keep the exposure to caregivers low when higher dose of radioiodine is necessary. Here we present a case-report of a 74-year old male patient with papillary thyroid carcinoma with local invasion and...

Background: In the current study the effect of shielded colpostat on rectum received dose was calculated in cervical brachytherapy using Monte Carlo (MC) method. Materials and Methods: Two 60Co sources of GZP6 brachytherapy unit used for intracavitary treatments were simulated using MCNPX Monte Carlo code. Also the two types of colpostats including shielded and unshielded were simulated inside ...

Background: The use of high-dose steroid therapy peri portoenterostomy may have a positive impact on the frequency of cholangitis and survival rate. Methods: A prospective study was conducted on two groups of patients (less than three months of age) suffering from biliary atresia from 1999 to 2005. The patients in group I (G I) were managed peri-operatively by high-dose methylprednisolone while...

this trial was performed to determine if a continuous low-dose infusion of methylprednisolone is as effective as its bolus of high-dose in reducing inflammatory response. the study was single-center, double-blinded randomized clinical trial and performed in a surgical intensive care unit of an academic hospital. in this study, 72 consecutive patients undergoing elective coronary artery bypass g...