Essays about: "Sahlgrenska University Hospital"

Showing result 1 - 5 of 15 essays containing the words Sahlgrenska University Hospital.

1. 1. Evaluating aperture shape controller (ASC) in modulated radiation treatments

   University essay from

   Author : Vilma Andrén Cederholm; [2023-09-28]
   Keywords : Medical physics;

   Abstract : To decrease aperture complexity, the aperture shape controller (ASC) is a recently introduced function in Eclipse external beam planning (Varian Medical Systems, Palo Alto, USA). ASC works within the photon optimizer, minimizing distances between adjacent leaf tips of the MLC. READ MORE

3. 2. Evaluation of the DXA radiation environment at Sahlgrenska University Hospital

   University essay from

   Author : Saga Söderholm; [2022-05-18]
   Keywords : Medical physics; DXA; DEXA; Dual-energy X-ray absorptiometry; Bone mineral density;

   Abstract : Purpose: The aims of this work were to evaluate the radiation environment in the dual-energy X-ray absorptiometry (DXA) rooms at Sahlgrenska University Hospital, estimate personnel doses, determine legal requirements for DXA personnel, examine the operators’ view on radiation safety and develop material with dose information for patients and operators. Theory: DXA is a low dose X-ray modality mainly used in osteoporosis examinations, for which it is considered the reference technique. READ MORE

4. 3. Evaluation of deep learning image reconstruction for brain- and abdominal CT - A visual grading characteristics study

   University essay from

   Author : Tuva Skarp; [2022-05-04]
   Keywords : Medical physics; CT; Computed tomography; imaging; Deep learning image reconstruction;

   Abstract : Computed tomography (CT) is a common medical imaging method today. There are different ways of reconstructing the images from a CT examination. The standard method is the filtered back projection (FBP). READ MORE

5. 4. Evaluation of whole-body bone scans performed using a gamma camera with Cadmium Zinc Telluride detector

   University essay from

   Author : Victor Asp; [2022-01-13]
   Keywords : Medical physics; whole-body bone scans; gamma camera; Cadmium Zinc Telluride detector;

   Abstract : The bone scan is a common nuclear medicine imaging procedure that is mainly used for evaluating several oncological patient groups. A radioactive tracer, 99mTc -labelled diphosphonate, is injected intravenously and accumulates in the skeleton. The distribution of the tracer in the body is measured with a gamma camera 3 hours post-injection. READ MORE

6. 5. STANDARDIZED ORGAN AT RISK VOLUME FOR EXTERNAL BEAM RADIATION THERAPY IN PROSTATE CANCER AND ITS RELATIONSHIP TO VOLUMES DEFINED BY CLINICAL PRACTICE

   University essay from

   Author : Dang Thao; [2022-01-13]
   Keywords : Medical physics; Radiation therapy; Prostate cancer; Organs at risk;

   Abstract : Background/ Purpose: In radiation therapy (RT), the radiation dose calculated in tumours and normal tissue depends on how the volumes are defined. It is difficult to standardize how tumour volumes should be defined because their anatomical extension can differ greatly between individuals. READ MORE