Comparison of Radiography and Computed Tomography for Evaluation of Third Carpal Bone Fractures in Horses.
Authors: Steel Catherine, Ahern Benjamin, Zedler Steven, Vallance Stuart, Galuppo Lawrence, Richardson Jennifer, Whitton Christopher, Young Alex
Journal: Animals : an open access journal from MDPI
Summary
# Editorial Summary: Radiography versus CT for Third Carpal Bone Fractures Radiographic assessment of third carpal bone fractures in racehorses consistently underestimates injury severity, prompting Steel and colleagues to compare the diagnostic capability of digital radiography (DR) and computed tomography (CT) across 26 affected horses and 10 controls. Using kappa statistics to measure agreement between imaging modalities on 38 carpal limbs, the researchers found that whilst DR and CT showed good concordance for fracture displacement, agreement dropped to fair levels for comminution, articular surface bone loss, and fragmentation, and poor-to-slight agreement for detecting complete fracture lines, additional fissures, and lucencies. CT identified substantially more detailed information about fracture configuration and associated bone pathology than radiography alone, demonstrating its superior capability in characterising the full extent of C3 injury. For equine practitioners involved in surgical planning and prognostication, these findings suggest that CT imaging warrants serious consideration in cases where treatment decisions hinge on precise fracture anatomy—particularly when managing high-value or competition horses where accurate assessment directly influences outcomes and return-to-function expectations.
Read the full abstract on PubMed
Practical Takeaways
- •Digital radiography alone underestimates third carpal bone injury severity; CT should be considered for accurate diagnosis and surgical planning in valuable racehorses
- •When managing C3 fractures, expect CT to reveal additional bone pathology (comminution, fissures, articular damage) not visible on radiographs, which may influence treatment decisions
- •Use CT imaging before making definitive management decisions for third carpal bone fractures to avoid undertreatment based on incomplete radiographic information
Key Findings
- •CT identified significantly more bone pathology than digital radiography in horses with third carpal bone fractures
- •Intermodality agreement was good for fracture displacement but poor-fair for comminution, articular surface loss, and complete fracture determination
- •CT provides superior detailed information for fracture geometry and concomitant lesion identification compared to radiography
- •15 racehorses with C3 fractures showed greater pathology on CT than initially apparent on radiographs