The Feasibility of High-Resolution Peripheral Quantitative Computed Tomography (HR-pQCT) in Patients with Suspected Scaphoid Fractures

M S A M Bevers, A M Daniels, C E Wyers, B van Rietbergen, P P M M Geusens, S Kaarsemaker, H M J Janzing, P F W Hannemann, M Poeze, J P W van den Bergh*

*Corresponding author for this work

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Abstract

INTRODUCTION: Diagnosing scaphoid fractures remains challenging. High-resolution peripheral quantitative computed tomography (HR-pQCT) might be a potential imaging technique, but no data are available on its feasibility to scan the scaphoid bone in vivo.

METHODOLOGY: Patients (≥18 years) with a clinically suspected scaphoid fracture received an HR-pQCT scan of the scaphoid bone (three 10.2-mm stacks, 61-μm voxel size) with their wrist immobilized with a cast. Scan quality assessment and bone contouring were performed using methods originally developed for HR-pQCT scans of radius and tibia. The contouring algorithm was applied on coarse hand-drawn pre-contours of the scaphoid bone, and the resulting contours (AUTO) were manually corrected (sAUTO) when visually deviating from bone margins. Standard morphologic analyses were performed on the AUTO- and sAUTO-contoured bones.

RESULTS: Ninety-one patients were scanned. Two out of the first five scans were repeated due to poor scan quality (40%) based on standard quality assessment during scanning, which decreased to three out of the next 86 scans (3.5%) when using an additional thumb cast. Nevertheless, after excluding one scan with an incompletely scanned scaphoid bone, post hoc grading revealed a poor quality in 14.9% of the stacks and 32.9% of the scans in the remaining 85 patients. After excluding two scans with contouring problems due to scan quality, bone indices obtained by AUTO- and sAUTO-contouring were compared in 83 scans. All AUTO-contours were manually corrected, resulting in significant but small differences in densitometric and trabecular indices (<1.0%).

CONCLUSIONS: In vivo HR-pQCT scanning of the scaphoid bone is feasible in patients with a clinically suspected scaphoid fracture when using a cast with thumb part. The proportion of poor-quality stacks is similar to radius scans, and AUTO-contouring appears appropriate in good- and poor-quality scans . Thus, HR-pQCT may be promising for diagnosis of and microarchitectural evaluations in suspected scaphoid fractures.

Original languageEnglish
Pages (from-to)432-442
Number of pages11
JournalJournal of Clinical Densitometry
Volume23
Issue number3
Early online date16 Aug 2019
DOIs
Publication statusPublished - 2020

Keywords

  • scaphoid fracture
  • high-resolution peripheral quantitative computed tomography
  • in vivo imag-ing
  • scan quality
  • automatic contouring algorithm
  • BONE MICROARCHITECTURE
  • DISTAL RADIUS
  • PARAMETERS
  • REPRODUCIBILITY
  • MICROSTRUCTURE
  • PREVALENCE
  • MANAGEMENT
  • DIAGNOSIS
  • QUALITY
  • MOTION

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