Highlights
- •Review current radiographic views of scaphotrapezial and scaphotrapezoid joints
- •Describe current challenges involved in radiographic imaging of these joints
- •Calculate planes of best fit for both joints using 3D-CT reconstructions
- •Demonstrate patient positioning for novel radiographic views of these joints
- •Further studies required to assess efficacy of these views in detecting pathology.
Abstract
Purpose
To use a CT-based approach with 3D modeling to determine novel radiographic views
of the scaphotrapezial (STl) and scaphotrapezoid (STd) joints.
Materials and methods
Consecutive wrist CT scans excluding those with pathology of the distal radius, scaphoid,
trapezium, or trapezoid of subjects between ages 18 and 60 years were retrospectively
reviewed. Three-dimensional reconstructions of CT scans were created and best-fit
planes of the STl and STd joints were generated. Angles of these planes relative to
a distal radial coordinate system were calculated to determine tilt of the wrist and
the X-ray beam for novel radiographic views of these joints.
Results
Fifty eligible wrist CT scans were identified. The mean age was 38 years (range, 18
to 59). For the novel STl PA view, the wrist is supinated 17° from the standard PA
view and the X-ray beam is canted 6° caudad. In the STl lateral view, the wrist is
pronated 17° from the standard lateral view, and the X-ray beam is canted 20° caudad.
In the STd PA tilt view, the wrist is supinated 28° from the standard PA view, and
the X-ray beam is canted 13° caudad. In the STd joint lateral tilt view, the wrist
is pronated 28° from the standard lateral view, and the X-ray beam is canted 29° caudad.
Conclusion
We describe novel radiographic views of the STl and STd joints based on 3D modeling
of wrist CT scans. Further studies are required to assess the efficacy of these views
in detecting joint pathology.
Keywords
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Article info
Publication history
Published online: April 23, 2018
Accepted:
April 16,
2018
Received in revised form:
April 2,
2018
Received:
February 13,
2018
Identification
Copyright
© 2018 Elsevier Inc. All rights reserved.
