introduction wedge modifiers are commonly applied in external beam radiotherapy to change the dose distribution corresponding to the body contour and to obtain a uniform dose distribution within the target volume. since the radiation dose delivered to the target must be within ±5% of the prescribed dose, accurate dose calculation by a treatment planning system (tps) is important. the objective ...

the aim of this study was to evaluate the morbidity and mortality in patients with operable stage ii and iii rectal cancers within one or two months after surgery, who has been treated pre-operatively with short course radiotherapy. twenty-eight patients with rectal adenocarcinoma, consecutively referred to the cancer institute of imam khomeini hospital from march 2009 to march 2010, were selec...

introduction a mucocele is an epithelial-lined, mucus-containing sac that can fill the sinus completely and expand gradually. mucopyocele is an infected mucocele. case report we presented a case of left maxillary mucopyocele in a 58-year-old man that developed after radiotherapy for nasopharyngeal carcinoma. computed tomography scan showed opacification of the left maxillary sinus expanding thr...

solitary plasmacytoma of bone is a rare malignant tumor mostly involving the axial skeleton. the tumor occurs in middle- aged or elderly people (mean age: 55 years) and has a high risk of progression to multiple myeloma. radiotherapy is the preferred treatment for this disease. we report a case of recurrent solitary plasmacytoma of the fourth lumbar vertebra in a 35-year-old male. the patient s...

background: inflammatory myofibroblastic tumor (imt) is a tumor composed of myofibroblasts and a mixed inflammatory infiltrate that rarely undergoes malignant transformation. the most common sites of involvement include the lung, liver and orbit, but it has been reported to occur in nearly every site of the body, including oral cavity and soft tissue. although common in other sites, such a tumo...

background: in megavoltage radiotherapy rooms, ordinary concrete is usually used due to its low construction costs, although higher density concrete are sometimes used, as well. the use of high-density concrete decreases the required thickness of the concrete barrier hence, its disadvantage is its high cost. in a nuclear reactor, neutron radiation is the most difficult to shield. a method for p...

despite all advances, treatment of esophageal carcinoma is still unsatisfactory. currently the standard non-surgical treatment of esophageal cancer is concurrent chemotherapy and radiotherapy (chemoradiation), with results comparable to best surgical series. a few years ago, we started a chemoradiation protocol for the cancer of esophagus as a curative treatment, of which we present the prelimi...

BACKGROUND There are no consistent agreements on whether radiotherapy after breast-conserving surgery (BCS) could provide local control and survival benefit for older patients with early breast cancer or breast ductal carcinoma in situ (DCIS). The present study aimed to evaluate the efficacy of radiotherapy after BCS in older patients with early breast cancer or DCIS. RESULTS Radiotherapy cou...

Abstract Background : To explore the correlations of cofilin1 (CFL1) and phosphorylation level locus serine residue at position 3 (Ser3) with sensitivity elderly patients non-small cell lung cancer (NSCLC) to radiotherapy. Methods A total 102 eligible treated from June 2013 April 2015 were selected. The cases complete remission partial included into radiotherapy-sensitive group (n=55), while th...

the effects of combined radiotherapy (rt) and chemotherapy in the severity of cytogenetic alterations expressed as micronucleus (mn) in peripheral blood lymphocytes of patients treated for esophageal cancer was evaluated. to do this, blood was obtained from 23 and 15 esophageal cancer patients scheduled for chemo-radiotherapy and rt alone, respectively, before, during, and after treatment. bloo...