Quality controls for two heel bone ultrasounds used in the Swiss Evaluation of the Methods of Measurement of Osteoporotic Fracture Risk Study

Détails

ID Serval
serval:BIB_3337F1B45387
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Quality controls for two heel bone ultrasounds used in the Swiss Evaluation of the Methods of Measurement of Osteoporotic Fracture Risk Study
Périodique
Journal of Clinical Densitometry
Auteur(s)
Krieg  M. A., Cornuz  J., Hartl  F., Kraenzlin  M., Tyndall  A., Hauselmann  H. J., Lippuner  K., Rizzoli  R., Buche  D., Theiler  R., Dambacher  M. A., Neff  M., Pancaldi  P., Tanzi  F., Wimpfheimer  K., Burckhardt  P.
ISSN
1094-6950 (Print)
Statut éditorial
Publié
Date de publication
2002
Volume
5
Numéro
4
Pages
335-41
Notes
Evaluation Studies
Journal Article --- Old month value: Winter
Résumé
Because of the important morbidity and mortality associated with osteoporosis, it is essential to detect subjects at risk by screening methods, such as bone quantitative ultrasounds (QUSs). Several studies showed that QUS could predict fractures. None, however, compared prospectively different QUS devices, and few data of quality controls (QCs) have been published. The Swiss Evaluation of the Methods of Measurement of Osteoporotic Fracture Risk is a prospective multicenter study that compared three QUSs for the assessment of hip fracture risk in a population of 7609 women age >/=70 yr. Because the inclusion phase lasted 20 mo, and because 10 centers participated in this study, QC became a major issue. We therefore developed a QC procedure to assess the stability and precision of the devices, and for their cross-calibration. Our study focuses on the two heel QUSs. The water bath system (Achilles+) had a higher precision than the dry system (Sahara). The QC results were highly dependent on temperature. QUS stability was acceptable, but Sahara must be calibrated regularly. A sufficient homogeneity among all the Sahara devices could be demonstrated, whereas significant differences were found among the Achilles+ devices. For speed of sound, 52% of the differences among the Achilles+ was explained by the water s temperature. However, for broadband ultrasound attenuation, a maximal difference of 23% persisted after adjustment for temperature. Because such differences could influence measurements in vivo, it is crucial to develop standardized phantoms to be used in prospective multicenter studies.
Mots-clé
Calcaneus/*ultrasonography Calibration Fractures, Bone/etiology/*ultrasonography Humans Multicenter Studies Osteoporosis/*complications Phantoms, Imaging Quality Control Temperature Ultrasonography/*instrumentation/*standards
Pubmed
Web of science
Création de la notice
25/01/2008 13:41
Dernière modification de la notice
20/08/2019 13:19
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