Essays about: "imaging phantoms"

Showing result 11 - 15 of 44 essays containing the words imaging phantoms.

  1. 11. 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. 12. Evaluation of deep-learning image reconstruction for photon-counting spectral CT : A comparison between image domain- and projection domain-denoising

    University essay from KTH/Skolan för teknikvetenskap (SCI)

    Author : Morris Eriksson; Hannes Karlsson; [2021]
    Keywords : ;

    Abstract : A promising new technology in medical imaging is photon-counting detectors (PCD). Itcould allow for images with higher resolution, less noise, improved material decomposi-tion while possibly reducing radiation exposure for patients. READ MORE

  4. 13. Characterization of Center-of-Mass and Rebinning in Positron Emission Tomography with Motion

    University essay from KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

    Author : Linder Hugo; [2021]
    Keywords : positron emission tomography; center of mass; motion correction;

    Abstract : Medical molecular imaging with positron emission tomography (PET) is sensitive to patient motion since PET scans last several minutes. Despite advancements in PET, such as improved photon-pair time-of-flight (TOF) difference resolution, motion deformations limit image resolution and quantification. READ MORE

  5. 14. Noise Reduction of Scintillation Camera Images Using UNET: A Monte Carlo Simulation Approach

    University essay from Lunds universitet/Sjukhusfysikerutbildningen

    Author : Johanna Korpijärvi; [2021]
    Keywords : Medicine and Health Sciences;

    Abstract : Background The project aims to reduce the noise in planar 111-In projections with a machine learning model. Method Sixteen base phantoms were used to create 696 phantoms in XCAT. An anterior planar projection was simulated with 111-In and ten uptake curves for each phantom in SIMIND. READ MORE

  6. 15. Evaluation of internal dosimetry for 225- Ac using one single measurement based on 111-In imaging

    University essay from Lunds universitet/Sjukhusfysikerutbildningen

    Author : Selma Curkic; [2021]
    Keywords : Medicine and Health Sciences;

    Abstract : Background and aim: There is a high interest in determining the absorbed dose in tumors and organs for various radiotherapy cancer treatments. Due to limitations in today's methods of determining the patient specific absorbed dose it is usually not proceeded clinically. READ MORE