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 15 of 15 for “"SBRT"”.
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Feasibility of Using Stereotactic Body Radiation as an Alternative to HDR for Treatment of Cervical Cancers
… utilizing a Stereotactic Body Radiation Therapy (SBRT) or Intensity Modulated SBRT (IM-SBRT) approach was evaluated in this project. Method and Materials: Volumes covered by the HDR prescription were used to define a Clinical Target Volume (CTV), with a prescription of 3250 cGy to the CTV over 5 …
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Exploring the Role of GD-EOB-DTPA (Primovist®) MRI in Liver Stereotactic Body Radiation Therapy Accuracy
Liver Stereotactic Body Radiation Therapy (SBRT) is an effective alternative to surgical resection for liver oligometastases. Liver SBRT technique allows for the delivery of total radiation dose in a much smaller number of treatments compared to conventional radiotherapy course. This results in a …
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Measurements and characterization of intra-fractional prostate motion during SBRT treatment of prostate cancer on cyberknife for optimizing image-guided dose delivery
… tumor targets. However, in the case of prostate SBRT, intrafractional prostate motion presents a unique challenge for the accurate delivery of treatment. The purpose of this work is to characterize and quantify the time dependence of intra-fractional prostate motion. Results from this study will …
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RADIOMICS FOR OUTCOME PREDICTION IN EARLY-STAGE NON-SMALL CELL LUNG CANCER PATIENTS TREATED WITH STEREOTACTIC BODY RADIOTHERAPY (SBRT): METHODOLOGICAL CHALLENGES AND CLINICAL APPLICATIONS
ABSTRACT In recent years, Radiation Oncology has taken advantage of progresses in the fields of biology, computational sciences, and medical engineering. This has laid the foundation for the incorporation of high-throughput data, deriving from different sources, including medical images, …
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Impact of intrafractional prostate motion on the accuracy and efficiency of prostate cancer treatment on CyberKnife radiotherapy
… of time. Stereotactic-body radiation therapy (SBRT) is a form of radiotherapy that delivers increased dosage to the prostate with more precision. The results are shorter treatment times, increased effectiveness, and less toxicity to surrounding tissue. However, the prostate has been found to …
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Motion Estimation and Motion-Compensated Reconstruction for Four-Dimensional Cone Beam Computed Tomography (4D-CBCT)
… such as stereotactic body radiation therapy (SBRT) characterizing as high dose in each fraction and few fraction number requires higher accuracy for tumor localization. For organs influenced by the respiration, respiration induced motion becomes the principal cause for tumor localization …
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Moving Phantom Study of Stereotactic Body Radiation Therapy for Lung Cancer
… of current stereotactic body radiation therapy (SBRT) lung treatment methodologies, we performed a systematic evaluation using phantoms that simulated motions from real patients (irregular motions) as well as sinusoidal motions (regular motions). The irregular patterns investigated in this study …
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Evaluation of The Effectiveness of Anisotropic Analytical Algorithm In Flattened and Flattening-Filter-Free Beams For High Energy Lung Dose Delivery Using The Radiological Physics Center Lung Phantom
… algorithm is able to calculate SBRT treatment plans with all clinically used photon beams in the range from 6 MV to 18 MV. The measured dose distribution showed a good agreement with the calculated distribution using clinically acceptable criteria of ±5% dose or 3mm distance to …
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Fasting Reduces Intestinal Radiotoxicity Enabling Dose-Escalated Radiotherapy For Pancreatic Cancer
… cases, stereotactic body radiotherapy (SBRT) may be used to give tumor-directed radiotherapy (RT). Unfortunately, this can cause severe gastrointestinal (GI) toxicity due to proximity of the pancreatic head to the duodenum. Protecting the intestine from the toxic side-effects of …
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Improved Target Coverage of Spinal Metastases Through The Use of Flattening Filter Free Beams
… minimum dose of 14 Gy for single fraction SBRT or 21 Gy<sup>1</sup> for three fraction SBRT while maintaining acceptable doses to the cord and cauda equina. This proximity of the target to critical structures has the potential to compromise the efficacy of the radiation treatment plan in …
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Advancement of 31P Magnetic Resonance Spectroscopy Using GRAPPA Reconstruction on a 3D Volume
… with Stereotactic Body Radiation Therapy (SBRT) [3–5], as well as assessment of radiation toxicity, which can result in worsening liver dysfunction [6]. Pilot data from our lab has shown that 31P MRSI has the potential to identify treatment response five months sooner than conventional …
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Intelligent Automatic Treatment Planning for Radiation Therapy
… approval in Stereotactic Body Radiation Therapy (SBRT) for prostate cancer and High-Dose-Rate Brachytherapy (HDRBT) for cervical cancer, respectively. Chapters 5 and 6 present the development of the Virtual Treatment Planner Network (VTPN), trained through Deep Reinforcement Learning (DRL) for RT …
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The enterprise culture: an acquired taste?
… a number of Small Business Research Trust (SBRT) postal surveys and two specific studies - 145 enterprise and non-enterprise trainees and 307 growth-oriented and growth-averse small firm owners - plus two repertory grid studies of enterprise trainees. The aim is not to provide a better …
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Auto-Segmentation In Pancreatic and Liver Radiation Therapy
… such as stereotactic body radiation therapy (SBRT), are emerging as an important pillar of the management of liver and pancreatic cancer. The success of these treatment modalities hinges upon the precise and standardized segmentation of organs-at-risk and target volumes to ensure the optimal …
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On-board Robotic Multi-pinhole SPECT System for Region-of-interest (ROI) Imaging
… (IMRT) and stereotactic body radiation therapy (SBRT). These imaging techniques provide predominantly anatomical information for treatment planning and target localization. Recently, studies have shown that treatment planning based on functional and molecular information about the tumor and …