Estimation of radiographic joint space of the trapeziometacarpal joint with computed tomographic validation

David Jordan; John Elfar; Chian K. Kwoh; Zong-Ming Li

doi:10.1117/1.JMI.11.2.024001

4 March 2024 Estimation of radiographic joint space of the trapeziometacarpal joint with computed tomographic validation

David Jordan, John Elfar, Chian K. Kwoh, Zong-Ming Li

Author Affiliations +

Journal of Medical Imaging, Vol. 11, Issue 2, 024001 (March 2024). https://doi.org/10.1117/1.JMI.11.2.024001

Abstract

Purpose

Joint space width (JSW) is a common metric used to evaluate joint structure on plain radiographs. For the hand, quantitative techniques are available for evaluation of the JSW of finger joints; however, such techniques have been difficult to establish for the trapeziometacarpal (TMC) joint. This study aimed to develop a validated method for measuring the radiographic joint space of the healthy TMC joint.

Approach

Computed tomographic scans were taken of 15 cadaveric hands. The location of a JSW analysis region on the articular surface of the first metacarpal was established in 3D space and standardized in a 2D projection. The standardized region was applied to simulated radiographic images. A correction factor was defined as the ratio of the CT-based and radiograph-based joint space measurements. Leave-one-out validation was used to correct the radiograph-based measurements. A t-test was used to evaluate the difference between CT-based and corrected radiograph-based measurements (α=0.05).

Results

The CT-based and radiograph-based measurements of JSW were 3.61±0.72 mm and 2.18±0.40 mm, respectively. The correction factor for radiograph-based joint space was 1.69±0.41. Before correction, the difference between the CT-based and radiograph-based joint space was 1.43 mm [95% CI: 0.99−1.86 mm; p<0.001]. After correction, the difference was −0.11 mm [95% CI: −0.63−0.41 mm; p=0.669].

Conclusions

Corrected measurements of radiographic TMC JSW agreed well with CT-measured JSW. With in-vivo validation, the developed methodology has potential for automated and accurate radiographic measurement of TMC JSW.

Citation Download Citation

David Jordan, John Elfar, Chian K. Kwoh, and Zong-Ming Li "Estimation of radiographic joint space of the trapeziometacarpal joint with computed tomographic validation," Journal of Medical Imaging 11(2), 024001 (4 March 2024). https://doi.org/10.1117/1.JMI.11.2.024001

Received: 13 November 2023; Accepted: 15 February 2024; Published: 4 March 2024

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KEYWORDS

Radiography

Computed tomography

3D projection

Visualization

Biological imaging

Tomography

In vivo imaging

Purpose

Approach

Results

Conclusions

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