Automated quantification of muscle and fat in the thigh from water-, fat-, and nonsuppressed MR images

Sokratis Makrogiannis, Suraj Serai, Kenneth W. Fishbein, Catherine Schreiber, Luigi Ferrucci, Richard G. Spencer

Research output: Contribution to journalArticlepeer-review

Abstract

Purpose: To introduce and validate an unsupervised muscle and fat quantification algorithm based on joint analysis of water-suppressed (WS), fat-suppressed (FS), and water and fat (nonsuppressed) volumetric magnetic resonance imaging (MRI) of the mid-thigh region. Materials and Methods: We first segmented the subcutaneous fat by use of a parametric deformable model, then applied centroid clustering in the feature domain defined by the voxel intensities in WS and FS images to identify the intermuscular fat and muscle. In the final step we computed volumetric and area measures of fat and muscle. We applied this algorithm on datasets of water-, fat-, and nonsuppressed volumetric MR images acquired from 28 participants. Results: We validated our tissue composition analysis against fat and muscle area measurements obtained from semimanual analysis of single-slice mid-thigh computed tomography (CT) images of the same participants and found very good agreement between the two methods. Furthermore, we compared the proposed approach with a variant that uses nonsuppressed images only and observed that joint analysis of WS and FS images is more accurate than the nonsuppressed only variant. Conclusion: Our MRI algorithm produces accurate tissue quantification, is less labor-intensive, and more reproducible than the original CT-based workflow and can address interparticipant anatomic variability and intensity inhomogeneity effects.

Original languageEnglish (US)
Pages (from-to)1152-1161
Number of pages10
JournalJournal of Magnetic Resonance Imaging
Volume35
Issue number5
DOIs
StatePublished - May 2012
Externally publishedYes

Keywords

  • Body composition
  • Image segmentation
  • Thigh imaging

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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