Essays about: "MRI"

Showing result 1 - 5 of 295 essays containing the word MRI.

  1. 1. osimetric impact of system spe cific geometric distortion on head and neck treatment plans in MRI only based radiation therapy

    University essay from

    Author : Jesper Brovall; [2022-01-13]
    Keywords : Medical physics; Dosimetry; MRI; Radiation therapy;

    Abstract : 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 therapy (RT) process. In an MRI only workflow, the CT scan is excluded and a synthetic CT is used for treatment plan ning. READ MORE

  3. 2. ATLAS-BASED SEGMENTATION OF ULTRAHIGH-RESOLUTION STRUCTURAL MR HEAD IMAGES ACQUIRED AT 7 TESLA

    University essay from

    Author : Frida Johansson; [2022-01-13]
    Keywords : Medical physics; Anatomical segmentation; Brain; MRI; 7 Tesla; Pincram; MAPER; Shape based averaging; Ultrahigh resolution;

    Abstract : Purpose: The purpose of this work was to find out how the existing brain atlases and segmentation algorithms perform when applied to ultrahigh-resolution MR brain images, acquired with a 7-Tesla scanner. Also to make adaptations to deal with the potential challenges and evaluate the quality of the anatomical segmentations of the 7- Tesla images. READ MORE

  4. 3. Estimation of Height, Weight, Sex and Age from Magnetic Resonance Images using 3D Convolutional Neural Networks

    University essay from Linköpings universitet/Institutionen för medicinsk teknik

    Author : Carl Nimhed; [2022]
    Keywords : mr; magnetic resonance; machine learning; deep learning;

    Abstract : Magnetic resonance imagining is a non-invasive 3D imaging technology widely used in the medical field for partial and full body scans. AMRA Medical AB is a medical company which combines MRI images with additional patient attributes such as height, weight, sex and age to perform analysis such as body composition profiling. READ MORE

  5. 4. Imaging of the MTP joint: Developing an imaging protocol optimised for damage detection and 3D modelling

    University essay from KTH/Fysik

    Author : Johanna Jacobsson; [2022]
    Keywords : computed tomography; magnetic resonance imaging; cone beam computedtomography; cartilage; osteochondral lesions; metatarsal phalangeal joint; datortomografi; magnetisk resonanstomografi; kon-datortomografi; brosk; kondrala skador; metatarsalphalangen-leden;

    Abstract : Walking without pain in the toe has a significant impact on a person’s well-being. Human mobility will be impaired in osteoarthritis of the big toe, and pain will occur during walking. By replacing the cartilage or bone injury with an individualised implant, osteochondral injuries to the knee and ankle can be treated. READ MORE

  6. 5. Impact of MR training data on the quality of synthetic CT generation

    University essay from Umeå universitet/Institutionen för fysik

    Author : Gustav Jönsson; [2022]
    Keywords : Generative adversarial network; Machine learning; Radiotherapy; Synthetic CT; MR; CT;

    Abstract : Both computed tomography (CT) and magnetic resonance imaging (MRI) have a purpose for radiotherapy. But having two imaging sessions brings uncertainty which makes it beneficial to create synthetic CT (sCT) images from MR images. In this work a Generative Adversarial Network (GAN) was designed and implemented for sCT generation. READ MORE