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Abstract #1574

Correlation of MRI and externally visible findings by external fiducial markers

Bridgette Webb 1 , Andreas Petrovic 1 , and Eva Scheurer 1,2

1 Ludwig Boltzmann Institute for Clinical Forensic Imaging, Graz, Styria, Austria, 2 Institute of Forensic Medicine, Medical University Graz, Graz, Styria, Austria

To improve the correlation of externally visible lesions in skin and subcutaneous fatty tissue with MRI findings, external strand-shaped markers were developed and tested. The visibility of the markers in photography and MRI, and quality of the final registration were investigated. Visualization of the markers and internal soft tissue damage was possible using a combination of sequences. Using manual feature detection followed by an affine transformation, MR images were registered to photographs documenting external and internal damage. Selected points in the registered MR images and photographs were used to evaluate the registration, giving an overall RMSE of 1.05 mm (95%CI[0.46;1.42]).

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