Orthopaedic Research Page
![[PICTURE]](shoulder_banner.gif)
Rotator cuff tendons of the shoulder
My dissertation focused on three-dimensional spatial compounding of
ultrasound scans to produce volume reconstructions of the rotator cuff and
measure tendon thickness.
Abstract
Full coverage of the shoulder rotator cuff was accomplished by compounding
overlapping volume data acquired at different locations around the
shoulder. top: subset of image planes in volume space for 3
scans; center:
volume reconstructions of the individual scans; bottom: compound
volume
Orthogonal slices through the compound volume show the rotator
cuff and the surrounding anatomical landmarks. left shoulder of a
normal volunteer
A tear of the supraspinatus tendon of the left shoulder is contrasted with
the normal right shoulder. Movies of this data set are included below.
Below are two movies showing rotating volumes derived from the normal and
injured shoulders of a subject with an acute tear of the
left supraspinatus tendon. The movies show orthogonal slices through the
reconstructed and compounded gray-scale volumes; extracted surfaces of the
humeral head (blue) and the supraspinatus tendon are then superimposed.
The tendon
surface is colored according to the thickness of the tendon overlying the
bone (green = 7 mm, red = 14 mm).
In both cases the volume begins with an anterior view (coronal plane) and
rotates to a lateral view (sagittal plane). This repeats as the surfaces
are added.
The normal tendon exhibits a nearly-uniform thickness over the anterior
surface of the bone. In the injured case, the tendon has retracted from
the anterior surface and exhibits a distinct bulge in the lateral region.
Shoulder movie 1: normal (right)
shoulder
Shoulder movie 2: injured (left)
shoulder
Leotta DF, Martin RW. "Three-Dimensional Ultrsound Imaging of the
Rotator Cuff: Spatial Compounding and Tendon Thickness Measurement"
Ultrasound Med Biol, 26:509-525, 2000.
Abstract
Leotta DF, Martin RW. "Three-Dimensional Spatial Compounding of
Ultrasound
Scans with Weighting by Incidence Angle"
Ultrasonic Imaging, 22:1-19, 2000.
Abstract
Leotta DF, Martin RW. "Three-Dimensional Spatial Compounding of
Ultrasound Scans with Incidence Angle Weighting"
IEEE International Ultrasonics Symposium 1999, Lake Tahoe,
NV, October 1999.
Abstract
Leotta DF, Martin RW. "Three-Dimensional Spatial Compounding of Freehand
Ultrasound Scans of the Rotator Cuff "
Meeting of the American Institute of Ultrasound in Medicine, San Antonio,
TX, March 1999.
Abstract
Daniel Leotta, PhD
Email: leotta@u.washington.edu
Web: http://staff.washington.edu/leotta/
