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Showing 1 to 14 of 14 for “"radiochromic film"”.
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Commissioning An Anthropomorphic Spine and Lung Phantom For Remote Dose Verification of Institutions Participating In Rtog 0631
… was measured with axial and sagittal planes of radiochromic film and thermoluminescent dosimeters (TLD). The dose distributions were measured with the radiochromic film calibrated to the absolute dose measured by the TLD. Four irradiations were administered: a four angle box plan, a seven angle …
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Development and Implementation of A Homogeneous and A Heterogeneous Anthropomorphic End to End Quality Assurance Audit System Phantom For Magnetic Resonance Guided Radiotherapy Modalities Ranging From 0.35 T to 1.50 T
… materials were selected for the MRgRT phantoms, radiochromic film and double-loaded TLDs were then characterized in a 1.5T and a 0.35T MR environment. Reproducibility measurements on double-loaded TLDs were performed by using an acrylic block and irradiating it in 0T/1.5T and 0T/0.35T …
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Development and Implementation of An Anthropomorphic Pediatric Spine Phantom For The Assessment of Craniospinal Irradiation Procedures In Proton Therapy
… dosimeter (TLD)-100 capsules and radiochromic film embedded for dose evaluation. CT images of the phantom were acquired and used to create passive scattering and spot scanning treatment plans. Each plan was delivered three times at a dose of 6 Gy. The following attributes were …
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High-power target development for accelerator-based neutron capture therapy
… convert the dose profile measured with MD-55-2 radiochromic film into a map of beam current intensity. Analytic calculations coupled with Monte Carlo methods determined the resolution of this technique to be 0.22±0.01 mm. Liquid gallium metal was investigated as a possible coolant. Qualitative …
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Volumetric Modulated Arc Therapy Evaluation With The Radiological Physics Center Head and Neck Phantom
… with thermoluminescent dosimeters (TLDs) and radiochromic film, respectively. The measured and calculated doses of each treatment were compared to determine if they were clinically acceptable based upon RPC criteria of ±7% dose difference and 4 mm distance-to-agreement. Gamma analysis was used …
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Dosimetric characterization of a miniature x-ray source for biophysics studies
… experiments using Gafchromic’s XR-QA2 radiochromic film and Standard Imaging’s A-20 ionization chamber. To safely carry out the characterization experiments a dual layered safety shielding was constructed and parameters including beam dimensions, air-kerma and dose to tissue values from …
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Assessment of imaging dose from the kilovoltage cone beam computed tomography system on board the Varian Halcyon linear accelerator
… chambers. In-phantom dose measurements using Radiochromic film in RANDO pelvic and thoracic phantoms were used to generate a Normalisation Factor to relate the measured and simulated absorbed doses. To estimate the patient doses, Monte Carlo simulations were performed on the Adult Female …
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Evaluation of Intensity Modulated Radiation Therapy (Imrt) Delivery Error Due to Imrt Treatment Plan Complexity and Improperly Matched Dosimetry Data
… calculated using a different 6MV beam model. Radiochromic film and TLD within the phantom were used to analyze the dose profiles and absolute doses, respectively. The measured and calculated were compared to evaluate the dosimetric accuracy. All deliveries met the RPC acceptance criteria of …
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Development and Implementation of The Use of Optically Stimulated Luminescent Detectors In The Radiological Physics Center Anthropomorphic Quality Assurance Phantoms
… include thermoluminescent dosimeters (TLDs) and radiochromic film. The RPC desires to switch from TLD as the absolute dosimeter in the phantoms, to optically stimulated luminescent dosimeters (OSLDs), but a problem lies in the angular dependence exhibited by the OSLD. The purpose of this study …
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In Vivo Dosimetry Using Plastic Scintillation Detectors For External Beam Radiation Therapy
… to measurements made with an ion chamber and radiochromic film. Ionization quenching, an under-response due to densely ionizing radiation, was found to be responsible for a 7% loss of signal at the highest energy studied (250 MeV) and a 10% loss at the lowest (140 MeV). The under-response was …
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Ion dosimetry for radiobiology experiments employing laser-accelerated beams
… used dosimeter in ionization experiments is radiochromic film (RCF), as it provides an optical density response proportional to dose. However, it has been found by numerous research groups that this response to dose is different for particles of different types and energies, which is thought …
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CONE BEAM COMPUTED TOMOGRAPHY (CBCT) DOSIMETRY: MEASUREMENTS AND MONTE CARLO SIMULATIONS
… a 5-year-old pediatric anthropomorphic phantom. Radiochromic film was also employed to measure the axial dose profiles. A point dose method was used in the CTDI estimation.</p> <p>The BEAMnrc/EGSnrc MC system was used to simulate the CBCT scans; the MC model of the OBI x-ray tube was built into …
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Schemes of ion acceleration employing high energy, petawatt laser pulses
… - Thomson parabola spectrometers (TPS), radiochromic film (RCF), and time-of-flight (ToF) detectors. Energies approaching 60MeV are recorded in RCF stacks, and over 50MeV in the TPS, with an average energy comparable to what is achieved with 9μm plastic foils, also irradiated in this …
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Optimization of Image Guided Radiation Therapy for Lung Cancer Using Limited-angle Projections
… stimulated luminescence (OSL) detectors and radiochromic films. </p><p>The MMFD-NCC doses matched very well with the gold-standard doses. For the XCAT phantom study, the average (± S.D.) DDmin, DDmax, DDmean and DV100% (values normalized by the prescription dose or the total PTV volume) …