RT Journal Article
SR Electronic
T1 Determining Metacarpophalangeal Flexion Angle Tolerance for Reliable Volumetric Joint Space Measurements by High-resolution Peripheral Quantitative Computed Tomography
JF The Journal of Rheumatology
JO J Rheumatol
FD The Journal of Rheumatology
SP 1941
OP 1944
DO 10.3899/jrheum.160649
VO 43
IS 10
A1 Stephanie Tom
A1 Mark Frayne
A1 Sarah L. Manske
A1 Andrew J. Burghardt
A1 Kathryn S. Stok
A1 Steven K. Boyd
A1 Cheryl Barnabe
YR 2016
UL http://www.jrheum.org/content/43/10/1941.abstract
AB Objective. The position-dependence of a method to measure the joint space of metacarpophalangeal (MCP) joints using high-resolution peripheral quantitative computed tomography (HR-pQCT) was studied.Methods. Cadaveric MCP were imaged at 7 flexion angles between 0 and 30 degrees. The variability in reproducibility for mean, minimum, and maximum joint space widths and volume measurements was calculated for increasing degrees of flexion.Results. Root mean square coefficient of variance values were < 5% under 20 degrees of flexion for mean, maximum, and volumetric joint spaces. Values for minimum joint space width were optimized under 10 degrees of flexion.Conclusion. MCP joint space measurements should be acquired at < 10 degrees of flexion in longitudinal studies.