نتایج جستجو برای: lung tissue dosimetry
تعداد نتایج: 1182379 فیلتر نتایج به سال:
During stereotactic body radiotherapy, high radiation dose (~60 Gy) is delivered to the tumour in small fractionation regime. In this study, the dosimetric characteristics were studied using radiochromic film during respiratory-gated and non-gated lung stereotactic body radiotherapy (SBRT). Specifically, the effect of respiratory cycle and amplitude, as well as gating window on the dosimetry we...
Introduction: The dosimetry of the brachytherapy sources is performed in the water source medium according to protocol TG-43U1. To achieve a resonable results on treatment, the use of the water material for all body tissues can be one of the faulty sources in delivering the correct dose to the tumor. Thus, we have focused on the dosimetry parameters in fat density 0.95 gr/cm3 and the muscle wit...
Cellular and tissue activities highly depend on environmental pH. Murine lung tissue, when cultured properly in-vitro, is a potent producer of hematopoietic growth factors. We have studied the effect of pH on the production of hematopoietic growth factors and protein synthesis by the murine lung in-vitro. Various concentrations of NaHC03 were used to adjust the pH of the culture medium unde...
gastroesophageal reflux disease (gerd) is defined with clinical symptoms of heart burning and regurgitation. it may be associated with external esophageal symptoms such as chronic cough, asthma, laryngitis, chronic lung disease, sinusitis and pulmonary fibrosis. in the present study, rats with chronic aspiration of gastroduodenal contentswere studied for cellular phenotypes and cytokine c...
OBJECTIVE Passive scattering proton beam (PSPB) radiotherapy for accelerated partial-breast irradiation (APBI) provides superior dosimetry for APBI three-dimensional conformal photon radiotherapy (3DCRT). Here we examine the potential incremental benefit of intensity-modulated proton radiotherapy (IMPT) for APBI and compare its dosimetry with PSPB and 3DCRT. METHODS Two theoretical IMPT plans...
Purpose: The effects of Amiodarone on lung tissue and morphologic changes of alveolar cells. Materials and Methods: in this study, we used 21 mature male rabbits and they were divided into control and two experimental groups. Daily 80 mg/kg amiodarone was injected intra peritoneally to the experimental animals for one or two weeks. The control group received normal saline the same dose as amio...
cellular and tissue activities highly depend on environmental ph. murine lung tissue, when cultured properly in-vitro, is a potent producer of hematopoietic growth factors. we have studied the effect of ph on the production of hematopoietic growth factors and protein synthesis by the murine lung in-vitro. various concentrations of nahc03 were used to adjust the ph of the culture medium under co...
a 37 - year- old man came to the hospital with a history of penetrating thoracoabdominal trauma due to gunshot wound in 10 days before. he underwent laparatomy and hepatorrhaphy in that time and right sided chest tube was inserted. chest ct scan revealed metallic foreign body in lung tissue due to bullet burst. right thoracotomy was performed and metallic foreign body extracted from lung tissue
Due to the increasing proliferation of radiotherapy centers in the country to treat cancer patients and raise the quality of treatment, it is needed to find the human equivalent phantom for dosimetry, calibration and quality control of radiotherapy devices. Generally, they are enumerated into two categories: homogeneous and nonhomogeneous phantoms (anthropomorphic). The main purpose of this stu...
Abstract Aims: To investigate the effect of Myrtenol, the active ingredient of Myrtle, on the oxidant and anti-oxidant indices and cytokines in the allergic asthma. Methods: Allergic asthma was induced by ovalbumin (OVA) sensitization and inhalation in four groups of rats; Control, Asthma, Asthma+Dexamethasone and Asthma+Myrtenol. Myrtenol (50mg/kg) or Dexamethasone (2.5mg/kg) was a...
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