منابع مشابه
Determination of dosimetric quantities in pediatric abdominal computed tomography scans*
OBJECTIVE Aiming at contributing to the knowledge on doses in computed tomography (CT), this study has the objective of determining dosimetric quantities associated with pediatric abdominal CT scans, comparing the data with diagnostic reference levels (DRL). MATERIALS AND METHODS The study was developed with a Toshiba Asteion single-slice CT scanner and a GE BrightSpeed multi-slice CT unit in...
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Intensity-modulated radiation therapy (IMRT) provides the protection of the normal organs and a precise treatment plan through its optimization process. However, the final dose-volume histogram (DVH) obtained by this technique differs from the optimal DVH, owing to optimization convergence errors. Herein, intermediate dose calculation was applied to IMRT plans during the optimization process to...
متن کاملApplication of Dose-Area Product compared with three other dosimetric quantities used to estimate patient effective dose in diagnostic radiology
Background: Application of Dose-area product (DAP) quantity has been increased in the clinical practice. DAP is relatively easy to measure. DAP has been shown to correlate well with the total energy imparted to the patient, which is related to the effective dose. Material and Methods: In this study, measurements of DAP were carried out in a sample of 421 adult patients who underwent convention...
متن کاملDosimetric Quantities and Neutron Spectra Outside the Shielding of Electron Accelerators
Typical neutron spectra as found at high energy electron accelerators outside concrete shielding of various thicknesses (at 90 degrees) have been calculated at three electron energies (100 MeV, 1 and 10 GeV) with the FLUKA Monte Carlo transport code. The results have provided useful information about neutron attenuation lengths and about the fraction of neutrons with energy larger than 20 MeV, ...
متن کاملNeutron Spectra and Dosimetric Quantities Outside Typical Concrete Shielding of Synchrotron Facilities
Neutron energy spectra at high energy electron accelerators outside concrete shielding of various thicknesses (30 to 240 cm at 65-95 degrees) have been calculated at three electron energies (100 MeV, 1 and 10 GeV) and an optimum Cu target of 30.48 cm long and 5.08 cm in radius with the FLUKA Monte Carlo code. Dose quantities such as the protection quantity of Effective dose E and the operationa...
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ژورنال
عنوان ژورنال: Radiation Research
سال: 1992
ISSN: 0033-7587
DOI: 10.2307/3578474