Effect of Positioning of the ROI on BMD of the Forearm and Its Subregions
| Autor: | Alan O. Malabanan, Harold N. Rosen, Elizabeth O. Rosen, Elizabeth A. McNamara, LaTarsha G. Whittaker |
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| Rok vydání: | 2018 |
| Předmět: |
musculoskeletal diseases
0301 basic medicine Endocrinology Diabetes and Metabolism 030209 endocrinology & metabolism Patient Positioning 03 medical and health sciences Absorptiometry Photon 0302 clinical medicine Forearm Bone Density Region of interest mental disorders Ulnar styloid Humans Medicine Radiology Nuclear Medicine and imaging Orthopedics and Sports Medicine Aged Bone mineral business.industry Middle Aged medicine.anatomical_structure nervous system Female 030101 anatomy & morphology business Densitometry Nuclear medicine psychological phenomena and processes |
| Zdroj: | Journal of Clinical Densitometry. 21:529-533 |
| ISSN: | 1094-6950 |
| Popis: | Inconsistent positioning of patients and region of interest (ROI) is known to influence the precision of bone mineral density (BMD) measurements in the spine and hip. However, it is unknown whether minor shifts in the positioning of the ROI along the shaft of the radius affect the measurement of forearm BMD and its subregions. The ultradistal (UD-), mid-, one-third, and total radius BMDs of 50 consecutive clinical densitometry patients were acquired. At baseline the distal end of the ROI was placed at the tip of the ulnar styloid as usual, and then the forearm was reanalyzed 10 more times, each time shifting the ROI 1 mm proximally. No corrections for multiple comparisons were necessary since the differences that were significant were significant at p 0.001. The UD-radius BMD increased as the ROI was shifted proximally; the increase was significant when shifted even 1 mm proximally (p 0.001). These same findings held true for the mid- and total radius bone density, though the percent increase with moving proximally was significantly greater for the UD radius than for the other subregions. However, there was no significant change in the one-third radius BMD when shifted proximally 1-10 mm. Minor proximal shifts of the forearm ROI substantially affect the BMD of the UD-, mid- and total radius, while having no effect on the one-third radius BMD. Since the one-third radius is the only forearm region usually reported, minor proximal shifts of the ROI should not influence forearm BMD results significantly. |
| Databáze: | OpenAIRE |
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