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Showing 1 to 14 of 14 for “"IROC"”.
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Identifying Treatment Planning System Errors In Iroc-Houston Head and Neck Phantom Irradiations
… the Imaging and Radiation Oncology Core-Houston (IROC-H) can identify institutions that have not sufficiently modelled their linear accelerators in their TPS model. Linear accelerator point measurement data from IROC-H’s site visits was aggregated and analyzed from over 30 linear accelerator …
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Characterization of Treatment Planning System Photon Beam Modeling Errors In Iroc Houston Phantom Irradiations
… the Imaging and Radiation Oncology Core (IROC) Houston phantom credentialing framework, common observational characteristics among poor-performing phantoms were identified based on retrospective analyses of prior head and neck phantom performance. Next, treatment plan complexity, as …
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Extending The Lifetime of Optically Stimulated Dosimeters For Use In Output Checks At Iroc- Houston
… at the Imaging and Radiation Oncology Core (IROC)-Houston. These<br />dosimeters have a recommended dose limit of 10 Gy due to a change in signal response with dose. To assist with the OSLD operation at IROC-Houston, evaluating the signal response of these dosimeters with IROC’s methodologies …
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Quantifying The Magnitude of to tal Dose Deviation Caused By Various Sources of Error Among Iroc Phantom Irradiation Results
<p>The Imaging and Radiation Oncology Core (IROC) phantoms are used as an end-to-end test of an institution’s radiotherapy processes, and for clinical trial credentialing. Phantoms are treated like patients, and evaluation of the doses received by the thermoluminescent dosimeters (TLDs) inside the …
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Assessment of Uncertainty In Planning and Dose Delivery of Proton Therapy In An Iroc- Houston Qa Phantom Due to Variable Ct Technique and Proton Energy
… on the credentialing and auditing services of IROC-H and therefore the process must be well understood. The purpose of this project is to understand the uncertainties in proton therapy treatment planning for the IROC-H proton phantom QA program due to variations in CT technique and proton …
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Development and Implementation of An Anthropomorphic Head & Neck Phantom For The Assessment of Proton Therapy Treatment Procedures
… goal of the Imaging and Radiation Oncology Core (IROC) Houston QA Center is to assure NCI that institutions participating in clinical trials deliver radiation treatment plans/doses that are clinically comparable and consistent. IROC Houston makes use of anthropomorphic QA phantoms in order to help …
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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
… to perform a credentialing test provided by IROC-Houston. During the credentialing test, end-to-end phantoms are used to evaluate the institution’s ability to perform consistent and accurate radiation treatments. IROC-Houston’s conventional anthropomorphic phantoms are not visible in MR, thus …
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Development and Implementation of An Anthropomorphic Pediatric Spine Phantom For The Assessment of Craniospinal Irradiation Procedures In Proton Therapy
… by the Imaging and Radiation Oncology Core (IROC) Houston QA Center. It was hypothesized that the designed phantom would evaluate patient simulation, treatment planning and delivery, assuring agreement between the measured and calculated doses within 5%/3mm, with 85% of pixels passing …
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Development of A Remote Dosimetric Audit Framework For Carbon Therapy
… <p>The Imaging and Radiation Oncology Core (IROC) conducts remote audits of photon and proton therapy. These audits are used to ensure comparability and consistency among radiotherapy clinics and are an important peer-review tool to ensure accurate dose delivery. The most common detectors …
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Implementation of Upright Treatments For Lung and Head and Neck Cancers
… of 100%, which were within the acceptability of IROC Houston criteria. The results of this research confirmed the feasibility of upright treatments for lung and H&N cancers and can aid the institution in future clinical studies with actual subjects.</p>
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Quality Assurance of Advanced Treatment Modalities Using Presage® Dosimeters
… dosimetry for relative dose measurements. The IROC-Houston Head and Neck (HN) phantom was imaged with an x-ray CT scanner. One scan used an insert for film and thermoluminescent dosimeter (TLD). A second scan was taken using a PRESAGE<sup>® </sup>insert. An IMRT treatment plan was created and …
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Commissioning of Micro-Cube Thermoluminescent Dosimeters For Small Field Dosimetry Quality Assurance In Radiotherapy
… output dosimetry. Further aims were to adapt IROC Houston SRS head phantoms to use TLD micro-cubes for anthropomorphic phantom quality assurance and to test this design on linac, Gamma Knife, and CyberKnife treatment delivery machines. The final aim was to use TLD micro-cubes to evaluate …
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Phenotypic and genotypic characterization of salmonella isolates from chickens and humans in South Sudan.
… genes while they were positive for iroB, sinH, iroC and cdtB virulence genes. Thirty mobile genetic elements were identified of which the majority belonged to the insertion sequence, miniature inverted repeat, unit transposon and integrative conjugative element. Human isolates showed twenty-four …
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Influential Factors and Predicting Dose Delivery Accuracy for Imaging and Radiation Oncology Core’s Phantom Program using Machine Learning
<p>IROC’s mission is to help ensure consistent and comparable, high-quality radiotherapy across clinics that participate in national clinical trials. To obtain this mission, IROC’s phantom program provides a third-party end-to-end check of the clinical workflow of a patient receiving radiotherapy. …