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 9 of 9 for “"Dose Volume Histogram"”.
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Moment Constraints in Radiation Therapy Planning Optimization Incorporating Patient-Specific Anatomical Geometry
… healthy structures. In inverse planning, dose-volume histogram (DVH) is a key concept for measuring and restricting collateral radiation damage to healthy tissues. Interpreting the DVH as a probability distribution, a framework is proposed to assess the deviation from a reference …
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Development of A Beam-Specific Planning Target Volume and A Robust Plan Analysis to ol For Proton Therapy
… growing increasingly popular due to its superior dose characteristics compared to conventional photon therapy. Protons travel a finite range in the patient body and stop, thereby delivering no dose beyond their range. However, because the range of a proton beam is heavily dependent on the tissue …
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Assessment of Collimator Jaw Optimization In Reducing Normal Tissue Irradiation With Intensity Modulated Radiation Therapy
… To evaluate normal tissue dose reduction in step-and-shoot intensity-modulated radiation therapy (IMRT) on the Varian 2100 platform by tracking the multileaf collimator (MLC) apertures with the accelerator jaws.</p> <p><strong>Methods: </strong>Clinical radiation treatment …
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Improving The Accuracy of Radiation Pneumonitis Dose Response Models
… been reported to be 15%. Studies have shown that dose escalation to the tumor can lead to better local control and subsequently better overall survival. However, dose to lung tumor is limited by normal tissue toxicity. The most prevalent thoracic toxicity is radiation pneumonitis. In order to …
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Encapsulated Contrast Agent Markers For Mri-Based Post-Implant Dosimetry
<p>Low-dose-rate prostate brachytherapy involves the implantation of tiny radioactive seeds into the prostate to treat prostate cancer. The current standard post-implant imaging modality is computed tomography (CT). On CT images, the radioactive seeds can be distinctively localized but delineation …
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Head and Neck Cancer Offline Adaptive Radiotherapy Proof-of-Concept Workflow for Low-Resource Clinics Utilizing NTCP
… throughout the treatment regimen, reducing dose to nearby organs at risk (OAR) whenever possible. While online ART makes use of specific and costly machinery to create daily treatment plans for patients, a lack of standardization prevents large-scale offline ART research and/or clinical …
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Finite element modeling of high frequency irreversible electroporation
… and vessel wall. The data was presented as a dose volume histogram, and the blood vessel was found to decrease the electric field inside of the tumor as the distance between them was decreased. This decrease was approximately 100 V/cm for electric field values in the tumor that were already on …
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Investigation of Radiation Injury In The Esophagus From Definitive Chemoradiation Therapy Using Novel Imaging Biomarkers
… affects treatment efficacy by limiting dose and potentially interrupting radiation therapy. Clinical quantification of this toxicity is typically achieved by utilizing physician grading scales, assigning complication severity on an ordinal scale of symptom presentation and/or physician …
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Fractional Labelmap Representation of Anatomical Structures
… structures are often represented using image volumes known as labelmaps. Conversion of structures to labelmap representations results in a loss of information which impacts medical imaging algorithms, including those in radiation therapy (RT) treatment planning. RT treatment planning systems …