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 “"organ dose"”.
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Discrete ordinates CT organ dose simulator (DOCTORS)
… CT has raised concerns regarding long term low-dose radiological risks.</p><p>Currently, the dose to patients is computed using Monte Carlo methods and experimental tests. In other areas of radiation transport, deterministic codes have been shown to be much faster than Monte Carlo …
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CONE BEAM COMPUTED TOMOGRAPHY (CBCT) DOSIMETRY: MEASUREMENTS AND MONTE CARLO SIMULATIONS
… protocol for CBCT. Computed tomography dose index (CTDI), a standardized metric in conventional CT dosimetry, or direct organ dose measurements have been limitedly used in the CBCT dosimetry.</p> <p>This dissertation investigated the CBCT dosimetry from the CTDI method to the organ, …
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Radiation Dose Estimation for Pediatric Patients Undergoing Cardiac Catheterization
… patient radiation dosimetry, for key organs as well as whole-body effective, is challenging due to the lack of fixed imaging protocols, unlike other common X-ray based imaging modalities. </p><p>Pediatric patients are at a greater risk compared to adults due to their greater cellular …
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Investigating the ability to use the CT scan projection radiograph to monitor adolescent idiopathic scoliosis
… (CT) to assess AIS by quantifying radiation dose from the SPR acquisitions and comparing it to those of digital radiography (DR) and a dedicated scoliosis imaging system (EOS) and by evaluating the accuracy of Cobb angle measurements on SPR images using a bespoke validated phantom. Methods: A …
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Characterizing canine dose from external beam irradiation
Absorbed dose from Computed Tomography (CT) is a major concern on an individual basis as well as for the collective population due to increased frequency of and dependency on CT scans for diagnostic and therapeutic imaging. Colorado State University recently integrated a large bore multi-slice …
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In-Vivo Ct Dosimetry During Virtual Colonoscopy
… from radiation exposure. To date, no in‐vivo organ dose measurements have been performed for MDCT scans; thus, the accuracy of any current dose estimates is currently unknown.</p> <p>In this study, two TLDs were affixed to the inner lumen of standard rectal catheters used in VC, and in-vivo …