منابع مشابه
Fast-neutron radiobiology and radiotherapy.
The application of fast neutrons, negative pions or heavy ions will only provide an advantage for the radiotherapy of cancer if, in comparison with conventional radiations, e.g., X-rays, gamma rays and electrons, better depth-dose and collimation characteristics or specific radiobiological dose response relationships result in greater local control probabilities for tumours without increased fr...
متن کاملFast Neutron Dose Mapping in a Linac Radiotherapy Facility
CR-39 plastic detectors were used for fast neutron dose mapping in the radiotherapy facility at King AbdulAziz University Hospital (KAUH). Detectors were calibrated using a Cf neutron source and a neutron dosimeter. After exposure chemical etching was performed using 6N NaOH solution at 70 C. Tracks were counted using an optical microscope and the number of tracks/cm was converted to a neutron ...
متن کاملA fast model for prediction of respiratory lung motion for image-guided radiotherapy: A feasibility study
Background: The aim of this work was to study the feasibility of constructing a fast thorax model suitable for simulating lung motion due to respiration using only one CT dataset. Materials and Methods: For each of six patients with different thorax sizes, two sets of CT images were obtained in single-breath-hold inhale and exhale stages in the supine position. The CT images were then ...
متن کاملTreatment of salivary gland neoplasms with fast neutron radiotherapy.
OBJECTIVE To evaluate the efficacy of fast neutron radiotherapy for the treatment of salivary gland neoplasms. DESIGN Retrospective analysis. SETTING University of Washington Cancer Center, Neutron Facility, Seattle. PATIENTS The medical records of 279 patients treated with curative intent using fast neutron radiotherapy at the University of Washington Cancer Center were reviewed. Of the ...
متن کاملDesigning an Am-Be miniature neutron source
Background: Miniature neutron sources with high neutron flux have abundant applications in medicine, industry and researches. The most important general characteristic of miniature neutron sources is their diameter which is 3mm in average. In this research, we have surveyed and designed an Am-Be miniature neutron source fabrication. Materials and Methods: This investigation resulted in creation...
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ژورنال
عنوان ژورنال: Nature
سال: 1963
ISSN: 0028-0836,1476-4687
DOI: 10.1038/199923b0