Reliability of Lateral Distal Femur Dual-Energy X-Ray Absorptiometry Measures
| Autor: | Tishya A. L. Wren, Linda S. Chan, Nicole M. Mueske |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
musculoskeletal diseases
Adult Male medicine.medical_specialty Medullary cavity Endocrinology Diabetes and Metabolism Metaphysis Distal metaphysis Article Distal femur Absorptiometry Photon Bone Density medicine Humans Radiology Nuclear Medicine and imaging Orthopedics and Sports Medicine Femur Child Dual-energy X-ray absorptiometry Bone mineral medicine.diagnostic_test business.industry Reproducibility of Results Middle Aged musculoskeletal system Diaphysis medicine.anatomical_structure Anatomical sites Female Radiology business |
| Zdroj: | Journal of Clinical Densitometry. 17:522-527 |
| ISSN: | 1094-6950 |
| Popis: | Dual-energy x-ray absorptiometry (DXA) of the lateral distal femur (LDF) has been suggested for patients with metal implants or joint contractures preventing DXA scanning at conventional anatomical sites. This study assessed variability in LDF DXA measures due to repeat scanning using data from 5 healthy young adults who had 3 unilateral scans with repositioning between scans. Variability due to image analysis was evaluated in 10 children who underwent bilateral LDF scans with each scan being analyzed 3 times by 2 raters. Regions of interest (ROIs) were defined in the anterior distal metaphysis (R1), metadiaphysis (R2), and diaphysis (R3) as described previously. An additional region (R4) was defined in the metaphysis similar to R1 but centered in the medullary canal. Variability was consistently lower for bone mineral density (BMD) than for bone mineral content (BMC) and bone area; R4 was more repeatable than R1; and variability due to repeat scanning was negligible. These results suggest that DXA measures of the lateral distal femur are reliable and may be useful when standard DXA measures cannot be obtained, but it is recommended that a central, rather than anterior, ROI be used in the metaphysis. |
| Databáze: | OpenAIRE |
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