Abstract
Phenylketonuria (PKU) is a genetic disorder characterised by an inability to metabolise phenylalanine. Several studies have reported that the Corpus Callosum (CC) is one of the most severely affected structures with respect to volume loss in early treated PKU patients. In this work, we aim to detect the abnormalities of the CC in PKU from both global and local perspectives. 3D models of the CC are extracted from MRI data using a semiautomatic segmentation method. In the global analysis, raw and scaled volumes of the CC are compared between PKU patients and the controls. An oriented bounding box of the CC is constructed and its length, width and height are used as the MRI traits in our study. The raw and scaled values of these traits are compared between patients and controls. In the local analysis, shape differences at every surface point of the CC between PKU patients and the controls are computed using Hotelling T(2) two-sample metric followed by a permutation test. The height of the CC is found to be significantly shorter in the patients and significant shape abnormalities in the genu and splenium of the CC is also found in the patients.
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More From: International Journal of Computational Biology and Drug Design
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