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Updated: Apr 29, 2026

Four-Dimensional CT Analysis Using Sequential 3D-3D Registration
Published on: November 23, 2019
Dynamic evaluation of pisotriquetral instability using 4-dimensional computed tomography
Shadpour Demehri1, Vibhor Wadhwa, Gaurav K Thawait
1From The Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, MD.
Pisotriquetral instability, a wrist condition causing clicking and pain, was diagnosed using advanced 4-dimensional computed tomography. This imaging technique aided in the successful management of two patient cases.
Area of Science:
- Orthopedics
- Radiology
- Medical Imaging
Background:
- Pisotriquetral instability is a less common cause of ulnar wrist pain.
- Symptoms often include clicking and discomfort during wrist movement.
Purpose of the Study:
- To present two cases of pisotriquetral instability.
- To highlight the diagnostic utility of 4-dimensional computed tomography (4D-CT) in these cases.
Main Methods:
- Case study of two patients with ulnar wrist pain and clicking.
- Diagnosis confirmed using 4-dimensional computed tomography (4D-CT).
Main Results:
- 4D-CT accurately identified pisotriquetral instability in both patients.
- The imaging findings facilitated appropriate treatment planning.
Conclusions:
- 4D-CT is a valuable tool for diagnosing pisotriquetral instability.
- Early and accurate diagnosis leads to effective patient management.
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