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 5 of 5 for “"helical ct"”.
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Development and Implementation of Fully 3D Statistical Image Reconstruction Algorithms for Helical CT and Half-Ring PET Insert System
X-ray computed tomography: CT) and positron emission tomography: PET) have become widely used imaging modalities for screening, diagnosis, and image-guided treatment planning. Along with the increased clinical use are increased demands for high image quality with reduced ionizing radiation dose to …
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Computed tomography of cats without general anesthesia: feasibility, protocol development and assessment of cats with thoracic disease
… a novel device that allows computed tomography (CT) of awake cats and provides a clinically supportive environment, was designed. Ten normal cats were used to test the device for safety parameters, including ambient internal oxygen, carbon dioxide levels and temperature. The final design of the …
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List Mode Reconstruction in X-Ray CT and SPECT Imaging
Since the introduction of tomography imaging in the 1970s, it has become an indispensable tool in medical imaging, driving continuous advancements in pursuit of higher image quality, reduced scan time, lower radiation doses, and more recorded attributes. List mode data, which records all attributes …
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Impact of acquisition protocol variations on effective dose and risk for CT head examinations
… To propose a method for estimating the effective lifetime risk of radiation-induced cancer from different brain CT scan protocols in both paediatrics and adults and to develop a prospective method for estimating the number of cancer cases for patients undergoing CT brain scans when using …
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Plaquemorphologie bei Karotisstenosen : Möglichkeiten der präoperativen Evaluation durch den 64-Zeiler-Dual-Source-Computertomographen im Vergleich mit den histopathologischen Ergebnissen
… the Plaque composition by using the Dual-Source CT and to compare the results with the histopathological findings. The uniqueness of our study is the scanner-technology, which uses the energy of two x-ray tubes to achive a faster image edition/processing and a higher spatial resolution. …