Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 6 of 6 for “"Spot scanning"”.
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The Development and Implementation of An Anthropomorphic Head Phantom For The Assessment of Proton Therapy Treatment Procedures
… plans, proton passive scattering and proton spot scanning, were created. Thermoluminescent dosimeters (TLDs) and film were loaded into the phantom dosimetry insert. Each treatment plan was delivered three separate times. Each treatment plan passed our 5%/3mm criteria, with a reproducibility …
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Rapid Two-Photon Holographic Scan Microscopy with Individual Quantum Dots and Its Applications in Biological Samples
… are shown: 1) widefield, 2) diffraction-limited spot scanning with a single rastered spot, or 3) a multi-point excitation scheme employing a 9 × 9 matrix hologram that increases the scan rate by 80 fold. An array detector (EMCCD camera) was also used as a detector for 2-photon scanning …
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Development and Implementation of An Anthropomorphic Pediatric Spine Phantom For The Assessment of Craniospinal Irradiation Procedures In Proton Therapy
… 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 evaluated: absolute dose agreement, distal range, field width, junction match and right/left dose profile alignment. The hypothesis …
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Image-Guided Proton Therapy For Online Dose-Evaluation and Adaptive Planning
… we assessed a potential method to adapt spot scanning proton treatment plan beam parameters to account for anatomical changes. This range-adaptive method adjusts the proton beam directly to match the new range to anatomy in the treatment-time image. Using this technique, we were able to …
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3D Scintillator Detector Quenching Characterization For Scanning Proton Beams
<p>Proton pencil beam scanning is becoming the standard treatment delivery technique for proton therapy centers. Scanned proton pencil beams provide a highly conformal dose distribution. The complex dose distribution poses challenges for quality assurance measurements leading to sophisticated …
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Verification of The Clinical Implementation of The Respiratory Gated Beam Delivery Technique With Synchrotron-Based Proton Irradiation
… gating technique in both passive scattering and scanning delivery mode. Our hypothesis for the study was that optimization of the parameters of synchrotron operation and respiratory gating can lead to greater efficiency and accuracy of respiratory gating for all modes of synchrotron-based proton …