Browsing Masteruppsatser / Medicinsk strålningsvetenskap by Title
Now showing items 25-35 of 35
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FETAL DOSE ESTIMATION IN ABDOMINAL AND PELVIC CT EXAMINATIONS
(2021-05-10)Purpose: The purpose of this is study was to compare different methods for estimating the fetal dose, how much the different methods differ from each other and on which dose levels the fetal doses are estimated to. ... -
Measuring natural hemispheric asymmetry in the brain: quantifying the Yakovlevian torque phenomenon
(2022-01-13)Background: Just by a cursory examination, the two hemispheres of the human brain may appear as mirror images of one another. Yet, the left and right sides exhibit profound differences in anatomy. One of the most obvious ... -
Models for estimating radiation dose and LAR from radioactive fallout: extended dose algorithms for the computational tool LARCalc
(2022-09-09)Today, emergency preparedness is needed against both nuclear reactor accidents and nuclear weapons fallout. Both scenarios can lead to exposure of ionizing radiation. Upon exposure, radionuclides will incur a radiation ... -
Monte Carlo evaluation of static and dynamic 6FFF treatments - Evaluation of dose distributions calculated with AAA, Acuros XB, and Collapsed Cone (RayStation and DoseCheck)
(2023-02-23)There are several benefits to removing the standard flattening filter and using so-called flattening filter free (FFF) treatments in external radiation therapy with photons. The main advantage is the possibility of ... -
Optimization of MP2RAGE sequence parameters for head and neck T1-mapping and OE-MRI
(2022-05-04)Cancer is the collective name for more than 200 types of diseases that annually causes the death of 8.8 million people, cancer in the head and neck (H&N) accounts for 330.000 of these. It has been shown that hypoxic tumors ... -
osimetric impact of system spe cific geometric distortion on head and neck treatment plans in MRI only based radiation therapy
(2022-01-13)Background/ purpose: Because of the superior soft tissue contrast, in comparison with computed tomography (CT) data, magnetic resonance imaging (MRI) is of high interest to include in a larger extent in the ra diation ... -
Preprocessing for intravoxel incoherent motion analysis in the brain - Signal drift correction
(2023-04-17)Diffusion magnetic resonance imaging (dMRI) is a diagnostic imaging technique that is sensitized to the movement of water molecules in tissues. Intravoxel incoherent motion (IVIM) analysis can be used to estimate blood ... -
Region-based analysis of magnetic resonance brain images: integrating statistical analysis and visualization
(2022-04-05)Purpose: The purpose of the project was to develop a processing toolchain that takes MR brain images and their anatomical segmentations as input and produces image visualizations, data visualizations, and statistical ... -
STANDARDIZED ORGAN AT RISK VOLUME FOR EXTERNAL BEAM RADIATION THERAPY IN PROSTATE CANCER AND ITS RELATIONSHIP TO VOLUMES DEFINED BY CLINICAL PRACTICE
(2022-01-13)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 ... -
The value of cardiac MRI texture analysis in patients with clinically suspected myocarditis
(2021-05-10)Purpose: The aim of this proof-of-concept study was to assess the diagnostic value of texture analysis (TA) based on conventional balanced steady-state-free precession (bSSFP), late gadolinium enhancement (LGE) and ... -
Uptake and retainment of radionuclides in edible mushrooms – from fruiting to cooking
(2022-12-06)Purpose: The purpose of this study was to study the uptake, distribution and transfer of Mn-54, Zn-65, U-238, U-235, U-234, and Po-210 in mushrooms and their respective caps and stalks, the effects of chelates and ligands, ...