Dhulipala, Pranav Vaidik (2018-08). Using Landmark Based Susceptibility Weighted Imaging for Interventional Device Localization in MRI. Master's Thesis. Thesis uri icon

abstract

  • MRI is a widely studied imaging modality due to its superior resolution and soft-tissue contrast. However, the application of MRI is limited in cases when metallic interventional devices are present in the target tissues. High susceptibility of metallic objects often causes artifacts in MR images, making them difficult to localize. SWI is a widely used clinical tool to enhance the image contrast in MR imaging modality. SWI uses phase information of MR images to enhance contrast in tissues with different susceptibilities. In this study, we use a novel SWI-based approach called Metal ARtifact Based Landmark Enhanced SWI (MARBLES) to create a positive contrast image (PCI) for localizing the metallic objects in the MR images. The approach was tested on four different dataset and the results were observed, discussed and compared against that of a Qualitative Susceptibility Mapping (QSM) based approach.
  • MRI is a widely studied imaging modality due to its superior resolution and soft-tissue contrast.
    However, the application of MRI is limited in cases when metallic interventional devices are
    present in the target tissues. High susceptibility of metallic objects often causes artifacts in MR
    images, making them difficult to localize. SWI is a widely used clinical tool to enhance the image
    contrast in MR imaging modality. SWI uses phase information of MR images to enhance contrast
    in tissues with different susceptibilities. In this study, we use a novel SWI-based approach called
    Metal ARtifact Based Landmark Enhanced SWI (MARBLES) to create a positive contrast image
    (PCI) for localizing the metallic objects in the MR images. The approach was tested on four different
    dataset and the results were observed, discussed and compared against that of a Qualitative
    Susceptibility Mapping (QSM) based approach.

publication date

  • August 2018