BACKGROUND Radiation-sensitive polymer gels are among the most promising three-dimensional dose verification tools and tissue-like phantom developed to date. OBJECTIVE The aim of this study is an investigating of percentage depth dose enhancement within the gel medium with used of conformal distribution gold nanoparticle as contrast agents by high atomic number material. METHODS In this wor...

to determine the addition of value of neoadjuvant, concurrent and adjuvant chemotherapy to radiation in the treatment of nasopharyngeal carcinoma with regard to the overall survival (os) and disease free survival (dfs) within a six year period in tehran cancer institute. files of all patients with nasopharyngeal carcinoma treated by radiotherapy with or without concurrent chemotherapy in a cura...

background: keloids are benign fibrous dermal tumors originating from skin injury after surgery, piercing or others wounds. materials and methods: sixty-two patients with keloids were treated postoperatively using orthovoltage irradiation. the total dose delivered was 12 gy in three consecutive days, 4gy per fraction. treatment started 24 h after surgery. the median follow-up was 44.5 months. r...

leiomyosarcoma is a rare entity in prostate but it is the most common type of prostate sarcomas in adult patients. in most reported series the prognosis is poor and the median survival is about 15-18 months. hereby we present a 72 years old man who received combined modality treatment including radical surgery followed by adjuvant chemotherapy and radiotherapy. he has been well for 14 months, b...

introduction accurate estimation of the skin-absorbed dose in external radiation therapy is essential to estimating the probability of secondary carcinogenesis induction materials and methods electron contamination in prostate radiotherapy was investigated using the monte carlo (mc) code calculation. in addition, field size dependence of the skin dose was assessed. excess cancer risk induced by...

background and objective: esophageal cancer especially squamous cell carcinoma (scc) is one of the most common gastro intestinal malignancies in north part of iran (khorasan). the standard treatment for esophageal cancer is surgical resection, but its outcome remains poor. then, the oncologists try to treat this cancer with sandwich protocols especially neo-adjuvant chemo-radiotherapy. several ...

background: we evaluated the efficacy of a simple belly-board device (bbd) designed and made in our department for reduction of small bowel inside the post-operative pelvic radiotherapy fields of rectal carcinomas. methods: a very simple bbd was designed and manufactured in our department. it was made of acrylic glass, and was 128 cm long, 40 cm wide, and 9 cm high, with a 25x25 cm square openi...

background and aims. xerostomia is one of the most common complications of head and neck radiotherapy. the aim of this study was to evaluate and compare the efficacy of pilocarpine and bromhexine in improving radiotherapy-induced xerostomia and its associated symptoms. materials and methods. in this single-blind, randomized crossover study, pilocarpine and bromhexine tablets were used by twenty...