Essays about: "x-ray computed tomography"

Showing result 16 - 20 of 52 essays containing the words x-ray computed tomography.

1. 16. EVALUATION OF RADIATION DOSES USING CONE BEAM COMPUTED TOMOGRAPHY IN ENDOVASCULAR AORTIC REPAIR AND SCOLIOSIS PROCEDURES

   University essay from

   Author : Louise Strandberg; [2021-04-06]
   Keywords : Medical physics; Cone beam CT; CT; EVAR; scoliosis; radiation dose; effective dose;

   Abstract : Purpose: The study includes the two areas, vascular surgery and orthopedics, and focuses on endovascular aortic aneurysm repair (EVAR) and scoliosis procedures. EVAR procedures contribute to a high radiation dose to the patient and for scoliosis procedures, it is often young girls that are undergoing surgery. READ MORE

3. 17. Material decomposition using a photon counting X-ray detector in low energy range

   University essay from Lunds universitet/Sjukhusfysikerutbildningen

   Author : Rasmus Solem; [2021]
   Keywords : Medicine and Health Sciences;

   Abstract : Material decomposition in X-ray imaging is used to separate different materials or elements in an image and to quantify their respective concentration. The material decomposition and quantification are made possible by the dependency of attenuation on the attenuating material and photon energy. READ MORE

4. 18. Synchrotron X-ray Tomography Study of Bone-implant Integration

   University essay from Lunds universitet/Avdelningen för Biomedicinsk teknik

   Author : Ornella Lohéac; [2021]
   Keywords : Bone-implant; Digital volume correlation; Micro-computed tomography; PEEK; Synchrotron; Technology and Engineering;

   Abstract : Implant loosening is a recurring problem in the field of orthopedics, typically resulting in a physical and financial burden for the patient. Proper integration of orthopedic implants within host bones is a fundamental requirement for the successful function and limited risk of failure of implants which, in-vivo, must support various loading conditions. READ MORE

5. 19. Learning the Forward Operator in Photon-Counting Computed Tomography

   University essay from KTH/Matematik (Avd.)

   Author : Emanuel Ström; [2021]
   Keywords : Photon-Counting; Computed Tomography; Spectral CT; Regularisation; Deep Learning; Fotonräknande; Datortomografi; Spektral CT; Regularisering; Djupinlärning;

   Abstract : Computed Tomography (CT) is a non-invasive x-ray imaging method capable of reconstructing highly detailed cross-sectional interior maps of an object. CT is used in a range of medical applications such as detection of skeletal fractures, organ trauma and artery calcification. READ MORE

6. 20. Evaluation of the Impact of X-ray Tube Voltage and Filter Thickness on the Performance of Spectral Photon-Counting Detectors

   University essay from KTH/Medicinteknik och hälsosystem

   Author : Cassandra Mannila; Marcus Larsson; [2021]
   Keywords : Photon Counting Detectors; X-ray Tube Voltage; Filter Thickness; Detective Quantum Efficiency; Optimizing; Fotonräknande detektorer; Rörspänning; Filtertjocklek; DQE; Optimering;

   Abstract : During the past years photon-counting detectors (PCDs) have emerged as an alternative to conventional energy-integrating detectors and may significantly improve the standard of care for computed tomography (CT). There are two main alternatives for the material of the detector: cadmium telluride (CdTe) and silicon (Si). READ MORE