نتایج جستجو برای: maximum skin dose
تعداد نتایج: 769272 فیلتر نتایج به سال:
Background: Palliative whole brain radiotherapy (WBRT) has been the standard treatment for brain metastases. Ionizing radiation is known to be one of the most potent cataractogenic agents. We aimed to evaluate two different radiotherapy techniques with respect to the doses received by the organs at risk (OAR) in patients with brain metastasis who undergone WBRT. Materials and Methods: Ten conse...
AIM OF THE STUDY Accurate skin dose assessment is necessary during breast radiotherapy to assure that the skin dose is below the tolerance level and is sufficient to prevent tumour recurrence. The aim of the current study is to measure the skin dose and to evaluate the geometrical/anatomical parameters that affect it. MATERIAL AND METHODS Forty patients were simulated by TIGRT treatment plann...
After decades of neglect, the resurgence of tuberculosis in the United States between 1985 and 1992 renewed interest in the use of upper room ultraviolet germicidal irradiation to interrupt the transmission of airborne infections. More recently the bioterrorism threat and the appearance of new pathogens with the potential for airborne spread, such as severe acute respiratory syndrome (SARS), ha...
Introduction and purpose: The aim of this study is introducing a new Mono-Isocentric Technique)MIT) for external radiotherapy of the chest wall in the mastectomy patients with 6MV photon beams and comparing this technique with the Dual-Isocentric Technique(DIT). Materials and methods: Data of 18 mastectomy patients having chest wall radiotherapy were used. The target tissue was divided into...
Subcutaneous injection is now commonly used as a standard for bortezomib administration. The bortezomib (Velcade(®)) product monograph recommends that intravenous injections be prepared at a concentration of 1 mg/mL, while subcutaneous injections may be prepared at a concentration of 2.5 mg/mL. Many institutions and subcutaneous administration guidelines use 2 mL as the maximum volume for subcu...
Assessment of skin dose delivered to patients from radiotherapy x-ray beams should be performed both inside and outside the prescribed treatment fields. A multilayer Gafchromic film detector which has high sensitivity for detection of radiation can be used to measure skin dose in a two-dimensional map over the skin surface if required. This is an advantage over other detectors, which only provi...
BACKGROUND The safety, pharmacokinetics (PK) and pharmacodynamics of CEP-18770, a new peptide boronic acid proteasome inhibitor, have been investigated after intravenous administration on days 1, 4, 8 and 11 of every 21d cycle in patients with solid tumours and multiple myeloma (MM). PATIENTS AND METHODS Thirty-eight patients were treated with CEP-18770 at escalating doses from 0.1 to 1.8mg/m...
This work investigates the increase in surface dose caused by thermoplastic masks used for patient positioning and immobilization. A thermoplastic mask is custom fit by stretching a heated mask over the patient at the time of treatment simulation. This mask is then used at treatment to increase the reproducibility of the patient position. The skin sparing effect of mega-voltage X-ray beams can ...
BACKGROUND Severe skin rash as toxicity of erlotinib has been reported in relation to better response and survival. However, some patients require dose reduction due to skin toxicities, and their prognosis remains uncertain. We retrospectively evaluated the clinical course of non-small cell lung cancer patients receiving erlotinib at a reduced dose because of skin rash. PATIENTS AND METHODS A...
PURPOSE To limit the side effects of interventional neuroradiologic radiation, such as epilation, by applying a technique involving tube position rotation and by adding a supplemental inexpensive primary beam filter; and to show the dose effect of modifying technical factors. METHODS Combined skin dose from fluoroscopy and digital subtraction angiography was measured with an array of 16 therm...
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