Medizinische Universität Graz Austria/Österreich - Forschungsportal - Medical University of Graz
Gewählte Publikation:
SHR Neuro Krebs Kardio Lipid Stoffw Microb
Webb, BA; Petrovic, A; Urschler, M; Scheurer, E.
Assessment of fiducial markers to enable the co-registration of photographs and MRI data.
Forensic Sci Int. 2015; 248(2):148-153
Doi: 10.1016/j.forsciint.2014.12.027
Web of Science
PubMed
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- Führende Autor*innen der Med Uni Graz
- Webb Bridgette
- Co-Autor*innen der Med Uni Graz
- Petrovic Andreas
- Scheurer Eva
- Urschler Martin
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- Abstract:
- To investigate the visualisation of novel external fiducial skin markers in photography and MRI. To co-register photographs and MR images, and additionally assess the spatial accuracy of these co-registrations with the view of future application in the investigation of forensically relevant soft tissue lesions. Strand-shaped fiducial markers were secured externally over hematomas on the thigh of 10 volunteers. The region of interest was photographed and examined using MRI at 3T in oblique and transversal orientations and the visibility of the markers assessed. Markers provided 'control points' in both sets of images, enabling the computation of an affine transform to register oblique MR images to photographs. The fiducial registration error was evaluated by calculating the root-mean-square error of nine corresponding evaluation points visible in both modalities. Fiducial markers were clearly visualised in both photography and MRI. The co-registration of photographs and oblique MR images was achieved for all participants. The overall root-mean-square error for registrations was 1.18mm (TIRM) and 1.46mm (TSE2D with SPAIR fat-suppression). The proposed approach led to the successful visualisation of non-invasive fiducial markers using photography and MRI (TIRM and TSE2D (SPAIR) sequences). This visualisation, combined with an affine transformation process provided a simple, cost-effective way to accurately co-register photographs and MR images of subcutaneous hematomas located on the thigh. Further investigation of the novel markers and the proposed co-visualisation approach holds potential to improve not only the forensic documentation of soft tissue lesions, but to also improve certain clinical applications, including the area of dermatology. Copyright © 2015 Elsevier Ireland Ltd. All rights reserved.
- Find related publications in this database (using NLM MeSH Indexing)
- Adult -
- Fiducial Markers -
- Hematoma - pathology
- Humans -
- Magnetic Resonance Imaging -
- Models, Statistical -
- Photography -
- Prospective Studies -
- Soft Tissue Injuries - pathology
- Thigh -
- Find related publications in this database (Keywords)
- Soft tissue injuries
- MRI
- Fiducial markers
- Forensic medicine
- Multi-modal co-registration