Raymond, Christiana2016-08-192016-08-192016-05https://hdl.handle.net/11299/181815University of Minnesota M.S. thesis. May 2016. Major: Kinesiology. Advisor: Donald Dengel. 1 computer file (PDF); ix, 66 pages.PURPOSE: Investigate the validity and reliability of a novel lateral dual energy X-ray absorptiometry (DXA) scanning method for total, fat, and lean tissue mass quantification of the anterior and posterior thigh compartments. METHODS: Twenty-one (11 female; X̅age=20.3±1.3 yrs) college athletes participated, with segmentation of anterior/posterior thigh compartments completed via laterally-positioned DXA scans. Three technicians created custom regions of interest (ROIs) using bony landmarks for each scan via enCoreTM software. Paired t-tests (lateral vs. standard frontal position) evaluated the validity of this novel method while intra-class correlations (ICCs) and coefficients of variation (CV) examined intra-/inter-rater reliability. RESULTS: Total, fat, and lean mass comparisons between frontal and lateral DXA scans were non-significant (p-values: 0.15-0.74). High ICCs were observed between-/within-raters (0.983-0.999 and 0.954-0.999, respectively), with low variation across all measures (CVs: <5%). CONCLUSION: DXA measures using lateral positioning and custom ROIs for tissue mass quantification are valid and reliable versus standard frontal positioning.enBody CompositionDual Energy X-Ray AbsorptiometryReliabilityValidityThesis or Dissertation