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- Title
Spatial normalization of optical images of the human hand.
- Authors
Simončič, Urban; Rogelj, Luka; Ostrovršnik, Jaka; Tomšič, Matija; Stergar, Jošt; Hren, Rok; Milanič, Matija
- Abstract
Spatial normalization is an image registration method to coregister images to a previously defined template. It simplifies the analysis of images taken on the same patient or different patients, at different time points or captured with different imaging modalities. The paper presents a spatial normalization method for the human hand, together with a corresponding template of 21 manually and 242 automatically selected anatomical landmarks. Using landmarks and extrapolation technique, the method coregisters images to the template defined as an average position of individual landmarks on all images. The method is tested on 12 healthy human hands by evaluating the mismatch between the ground truth defined with ultrasound-determined landmarks and the ones defined visually using RGB images. The mean registration uncertainty over the hands was 1.4 ± 1.3 mm. The method utility is demonstrated by being successfully applied to 29 arthritic hands with a pathological finger and hand deformation. Spatial normalization of the hand images enables a pixel-wise analysis of multiple hand images of a same patient taken at different time points with the same modality, as well as images of the same patient taken with a different modality and inter-patient comparison.
- Subjects
OPTICAL images; IMAGE registration; IMAGE analysis; HUMAN beings; EXTRAPOLATION
- Publication
Electrotechnical Review / Elektrotehniski Vestnik, 2023, Vol 90, Issue 3, p117
- ISSN
0013-5852
- Publication type
Article