Tomosynthesis performance compared to radiography and computed tomography for sacroiliac joint structural damage detection in patients with suspected axial spondyloarthritis - 20/09/23
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Highlights |
• | Tomosynthesis was better than radiography in detecting sacroiliitis. |
• | Using tomosynthesis instead of radiography increased the sacroiliitis detection rate by 50% and halved the number of false positives. |
• | Tomosynthesis enabled us to decrease the effective doses by 5-fold as compared to CT acquisition. |
• | CT acquisitions could be avoided when the findings of primary tomosynthesis for sacroiliitis suspicion are negative. |
Abstract |
Purpose |
To compare tomosynthesis performance to radiography for the differentiation of sacroiliitis versus normal or degenerative changes in sacroiliac joints in patients with suspected axial spondyloarthritis (SpA).
Materials and methods |
Radiography, tomosynthesis and CT of sacroiliac joints (29 patients) were performed on the same day in consecutive patients with suspected SpA. The examinations were retrospectively read independently, blinded by two radiologists (one junior and one senior, and twice by one junior). Interobserver and intraobserver agreement was evaluated using the kappa coefficient. Effective doses for each imaging sensitivity, specificity and accuracy were assessed and compared with CT as gold standard.
Results |
CT detected 15/58 joints with sacroiliitis. The imaging sensitivity, specificity and accuracy were 60%, 84% and 44%, respectively, for radiography and 87%, 91% and 77% for tomosynthesis. The mean effective dose for tomosynthesis was significantly lower than that of CT (5-fold less) and significantly higher than that of radiography (8-fold more).
Conclusion |
Tomosynthesis is superior to radiography for sacroiliitis detection in patients with suspected SpA, with 5-fold less radiation exposure than CT.
Le texte complet de cet article est disponible en PDF.Keywords : Tomosynthesis, Radiography, Computer tomography, Sacroiliitis, Axial spondyloarthritis
Abbreviations : SpA, ASAS, RA
Plan
Vol 8
Article 100034- décembre 2023 Retour au numéro
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