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 7 of 7 for “"cone-beam CT (CBCT)"”.
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Evaluation of target motion and determination optional treatment margins for prostate cancer treated with external beam radiotherapy on Halcyon
Background External beam radiotherapy (EBRT) is an important part of the treatment for prostate cancer. To account for organ motion and set-up error, margins are used in radiotherapy planning. These are essential for the delivery of safe and effective treatment. Aim and Setting To measure prostate …
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Motion binning in cone-beam CT without a prior Model
Cone-beam CT (CBCT), used to reduce setup error in radiotherapy, takes a sequence of about 670 two-dimensional X-rays acquired in a circular arc around the patient over two minutes and reconstructs a three-dimensional volume from these projections. Consequently, when tissues move significantly …
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Improvements In Four-Dimensional and Dual Energy Computed to mography
<p>Dual energy and 4D computed tomography (CT) seek to address some of the limitations in traditional CT imaging. Dual energy CT, among other purposes, allows for the quantification and improved visualization of contrast materials, and 4D CT is often used in radiation therapy applications as it …
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Algebraic Reconstruction Methods for Complex Geometry Components
Industrial CT has seen widespread adoption as an inspection technique due to its ability to resolve small defects and perform high-resolution measurements on complex structures in Non Destructive Testing (NDT). The majority of the commercial cabinet systems are capable of acquisition and …
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Comparison of Cone-Beam Computed Tomography (CBCT), Fan-Beam Computed Tomography (FBCT), and Low-Field Magnetic Resonance Imaging (MRI) for Detection of Equine Fetlock Lesions
Computed tomography (CT) and magnetic resonance imaging (MRI) have been increasingly applied to diagnosing lameness localised to the fetlock region in standing horses. A full understanding of the benefits and limitations of CT and MRI for detection of bone and soft tissue lesions is essential for …
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Risk stratification in the management of localised prostate cancer treated with radical radiotherapy
… from two separate but interlinked perspectives; namely, physical- and imaging-based (arguably the more advanced of the two) and biology-based ‘radiogenomics’. The work reported here investigates both aspects of this topic in the context of localised prostate cancer, the management of …
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On-board Robotic Multi-pinhole SPECT System for Region-of-interest (ROI) Imaging
<p>On-board image guidance, such as cone-beam CT (CBCT) and kV/MV 2D imaging, is essential in many radiation therapy procedures, such as intensity modulated radiotherapy (IMRT) and stereotactic body radiation therapy (SBRT). These imaging techniques provide predominantly anatomical information for …