Long biceps tendon: normal position, shape, and orientation in its groove in neutral position and external and internal rotation.

Purpose: To characterize the position, shape, and orientation of the long biceps tendon (LBT) on transverse magnetic resonance (MR) images acquired in neutral position and in maximal external and internal rotation of the shoulder in asymptomatic volunteers. Buck FM, Dietrich TJ, Resnick D, Jost B, Pfirrmann CW. Radiology. 2011 Dec;261(3):872-81. Epub 2011 Oct 3. PMID: 21969668