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Related Concept Videos

Imaging Studies III: Computed Tomography01:27

Imaging Studies III: Computed Tomography

DefinitionComputed Tomography (CT) of the genitourinary (GU) tract is a non-invasive imaging modality that utilizes X-rays and computer processing to generate detailed cross-sectional images of the urinary system, encompassing the kidneys, ureters, bladder, and adjacent structures such as the adrenal glands.PurposeCT scans of the GU tract serve several diagnostic and therapeutic purposes, including:Diagnosis of Urinary Tract Diseases: Detects kidney stones, tumors, cysts, and congenital...

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Related Experiment Video

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Dissection, MicroCT Scanning and Morphometric Analyses of the Baculum
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Computed-tomography-based three-dimensional analysis of bilateral differences in phalanges.

Jana Betschart1, Lea Estermann1, Tobias Götschi2

  • 1Department of Orthopaedics, Hand Surgery Division, Balgrist University Hospital, University of Zürich, Zürich, Switzerland.

Hand Surgery & Rehabilitation
|December 13, 2024
PubMed
Summary
This summary is machine-generated.

This study analyzed 3D bone models of hand phalanges, finding minor but significant differences between left and right sides. These small variations are unlikely to impact corrective osteotomy planning using advanced 3D techniques.

Keywords:
Bilateral asymmetryComputer-assisted planningOsteotomyPatient-specificPhalanges

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Area of Science:

  • Orthopedic surgery
  • Medical imaging
  • Human anatomy

Background:

  • Preoperative planning for corrective osteotomy often assumes bilateral limb symmetry.
  • Limited data exists on the symmetry of hand phalanges.

Purpose of the Study:

  • To quantitatively assess the three-dimensional symmetry of hand phalanges.
  • To determine if existing symmetry assumptions are valid for phalangeal bone analysis.

Main Methods:

  • Created 3D bone models from computed tomography (CT) data of all phalanges from 20 healthy participants (40 hands).
  • Assessed differences between left and right phalanges in rotation, deviation, flexion-extension, and length.

Main Results:

  • Small average absolute differences were observed between left and right sides.
  • Significant mean differences noted for extension-flexion (1.1°), pronation (1.8°), ulnar-radial deviation (0.9°), and translation (0.2 mm).
  • Left proximal phalanges showed significant pronation compared to the right.

Conclusions:

  • While minor asymmetries exist in hand phalanges, they are statistically significant.
  • These differences are deemed clinically unimportant for preoperative planning in corrective osteotomy, especially with advanced 3D methods.