Increasing soft tissue thickness does not affect trabecular bone score reproducibility : a phantom study
Articolo
Data di Pubblicazione:
2018
Citazione:
Increasing soft tissue thickness does not affect trabecular bone score reproducibility : a phantom study / C. Messina, A. Poloni, V. Chianca, D. Albano, L.P. Piodi, F.M. Ulivieri, L.M. Sconfienza. - In: ENDOCRINE. - ISSN 1355-008X. - 61:2(2018 Aug), pp. 336-342. [10.1007/s12020-018-1647-8]
Abstract:
Purpose: Trabecular Bone Score (TBS) provides an indirect score of trabecular microarchitecture from lumbar spine (LS) dual energy X-ray absorptiometry. Increasing soft tissue thickness artifactually reduces TBS values; we evaluated the effect of a fictitious increase of soft tissue thickness on TBS and bone mineral density (BMD) reproducibility on a phantom model. Methods: A Hologic spine phantom was scanned with a QDR-Discovery W Hologic densitometer. Fresh pork rind layers of 5 mm were used to simulate the in-vivo soft tissues. For each scan mode (fast array [FA], array, high definition [HD]), 25 scans were consecutively performed without phantom repositioning, at 0 (no layers), 1 cm, 3 cm, and 6 cm of thickness. BMD and TBS reproducibility was calculated as the complement to 100% of least significant change. Results: Both BMD and TBS reproducibility slightly decreased with increasing soft tissue; this difference was statistically significant only for BMD using HD modality (reproducibility decreased from 99.4% at baseline to 98.4% at 6-cm of thickness). TBS reproducibility was slightly lower compared to that of BMD, and ranged between 98.8% (array, 0 cm) and 97.4% (FA, 6 cm). Without taking into account manufacturer BMI optimization, we found a progressive decrease of TBS mean values with increasing soft tissue thickness. The highest TBS difference between baseline scan and 6 cm was −0.179 (−14.27%) using HD. Conclusions: Despite being slightly lower than that of BMD, TBS reproducibility was not affected up to 6 cm of increasing soft tissue thickness, and was even less influenced by fat than BMD reproducibility.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Dual energy X-ray absorptiometry; Phantom; Precision; Reproducibility; Trabecular bone score; Endocrinology, Diabetes and Metabolism; Endocrinology
Elenco autori:
C. Messina, A. Poloni, V. Chianca, D. Albano, L.P. Piodi, F.M. Ulivieri, L.M. Sconfienza
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