Evaluation of three-dimensional acromiohumeral distance in the standing position and comparison with its conventional measuring methods
Abstract Background Narrowing of the acromiohumeral distance (AHD) implies a rotator cuff tear. However, conventional AHD measurements using two-dimensional (2D) imaging or with the patient in the supine position might differ from that while standing during daily activity. This study aimed to evalua...
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doaj-1a7502bab87d4c8287f2eabb49a24bfd2020-11-25T02:44:22ZengBMCJournal of Orthopaedic Surgery and Research1749-799X2020-09-011511910.1186/s13018-020-01935-9Evaluation of three-dimensional acromiohumeral distance in the standing position and comparison with its conventional measuring methodsYuki Yoshida0Noboru Matsumura1Yoshitake Yamada2Minoru Yamada3Yoichi Yokoyama4Morio Matsumoto5Masaya Nakamura6Takeo Nagura7Masahiro Jinzaki8Department of Orthopedic Surgery, Keio University School of MedicineDepartment of Orthopedic Surgery, Keio University School of MedicineDepartment of Radiology, Keio University School of MedicineDepartment of Radiology, Keio University School of MedicineDepartment of Radiology, Keio University School of MedicineDepartment of Orthopedic Surgery, Keio University School of MedicineDepartment of Orthopedic Surgery, Keio University School of MedicineDepartment of Orthopedic Surgery, Keio University School of MedicineDepartment of Radiology, Keio University School of MedicineAbstract Background Narrowing of the acromiohumeral distance (AHD) implies a rotator cuff tear. However, conventional AHD measurements using two-dimensional (2D) imaging or with the patient in the supine position might differ from that while standing during daily activity. This study aimed to evaluate the three-dimensional (3D) actual distance between the acromion and humeral head in the standing position and compare the AHD values with those obtained using conventional measuring methods. Methods Computed tomography (CT) images of 166 shoulders from 83 healthy volunteers (31 male and 52 female; mean age 40.1 ± 5.8 years; age range, 30–49 years) were prospectively acquired in the supine and standing positions using conventional and upright CT scanners, respectively. The minimum distance between the acromion and humeral head on the 3D surface models was considered as the 3D AHD. We measured the 2D AHD on anteroposterior digitally reconstructed radiographs. The AHD values were compared between the supine and standing positions and between the 2D and 3D measurements. Results The mean values of 2D AHD were 8.8 ± 1.3 mm (range, 5.9–15.4 mm) in the standing position and 8.1 ± 1.2 mm (range, 5.3–14.3 mm) in the supine position. The mean values of 3D AHD were 7.3 ± 1.4 mm (range, 4.7–14.0 mm) in the standing position and 6.6 ± 1.2 mm (range, 4.4–13.7 mm) in the supine position. The values of 3D AHD were significantly lower than those of 2D AHDs in both the standing and supine positions (P < 0.001). The values of 2D and 3D AHDs were significantly lower in the supine position than in the standing position (P < 0.001). Conclusions This study evaluated the 3D AHD of normal shoulders in the standing position using an upright CT scanner. The present results indicated that assessments in the supine position can underestimate the value of the AHD compared with those made in the standing position and that assessments using 2D analysis can overestimate the value.http://link.springer.com/article/10.1186/s13018-020-01935-9Normal shoulderAcromiohumeral distanceAcromiohumeral intervalUpright computed tomographyPositionDigitally reconstructed radiographs |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yuki Yoshida Noboru Matsumura Yoshitake Yamada Minoru Yamada Yoichi Yokoyama Morio Matsumoto Masaya Nakamura Takeo Nagura Masahiro Jinzaki |
spellingShingle |
Yuki Yoshida Noboru Matsumura Yoshitake Yamada Minoru Yamada Yoichi Yokoyama Morio Matsumoto Masaya Nakamura Takeo Nagura Masahiro Jinzaki Evaluation of three-dimensional acromiohumeral distance in the standing position and comparison with its conventional measuring methods Journal of Orthopaedic Surgery and Research Normal shoulder Acromiohumeral distance Acromiohumeral interval Upright computed tomography Position Digitally reconstructed radiographs |
author_facet |
Yuki Yoshida Noboru Matsumura Yoshitake Yamada Minoru Yamada Yoichi Yokoyama Morio Matsumoto Masaya Nakamura Takeo Nagura Masahiro Jinzaki |
author_sort |
Yuki Yoshida |
title |
Evaluation of three-dimensional acromiohumeral distance in the standing position and comparison with its conventional measuring methods |
title_short |
Evaluation of three-dimensional acromiohumeral distance in the standing position and comparison with its conventional measuring methods |
title_full |
Evaluation of three-dimensional acromiohumeral distance in the standing position and comparison with its conventional measuring methods |
title_fullStr |
Evaluation of three-dimensional acromiohumeral distance in the standing position and comparison with its conventional measuring methods |
title_full_unstemmed |
Evaluation of three-dimensional acromiohumeral distance in the standing position and comparison with its conventional measuring methods |
title_sort |
evaluation of three-dimensional acromiohumeral distance in the standing position and comparison with its conventional measuring methods |
publisher |
BMC |
series |
Journal of Orthopaedic Surgery and Research |
issn |
1749-799X |
publishDate |
2020-09-01 |
description |
Abstract Background Narrowing of the acromiohumeral distance (AHD) implies a rotator cuff tear. However, conventional AHD measurements using two-dimensional (2D) imaging or with the patient in the supine position might differ from that while standing during daily activity. This study aimed to evaluate the three-dimensional (3D) actual distance between the acromion and humeral head in the standing position and compare the AHD values with those obtained using conventional measuring methods. Methods Computed tomography (CT) images of 166 shoulders from 83 healthy volunteers (31 male and 52 female; mean age 40.1 ± 5.8 years; age range, 30–49 years) were prospectively acquired in the supine and standing positions using conventional and upright CT scanners, respectively. The minimum distance between the acromion and humeral head on the 3D surface models was considered as the 3D AHD. We measured the 2D AHD on anteroposterior digitally reconstructed radiographs. The AHD values were compared between the supine and standing positions and between the 2D and 3D measurements. Results The mean values of 2D AHD were 8.8 ± 1.3 mm (range, 5.9–15.4 mm) in the standing position and 8.1 ± 1.2 mm (range, 5.3–14.3 mm) in the supine position. The mean values of 3D AHD were 7.3 ± 1.4 mm (range, 4.7–14.0 mm) in the standing position and 6.6 ± 1.2 mm (range, 4.4–13.7 mm) in the supine position. The values of 3D AHD were significantly lower than those of 2D AHDs in both the standing and supine positions (P < 0.001). The values of 2D and 3D AHDs were significantly lower in the supine position than in the standing position (P < 0.001). Conclusions This study evaluated the 3D AHD of normal shoulders in the standing position using an upright CT scanner. The present results indicated that assessments in the supine position can underestimate the value of the AHD compared with those made in the standing position and that assessments using 2D analysis can overestimate the value. |
topic |
Normal shoulder Acromiohumeral distance Acromiohumeral interval Upright computed tomography Position Digitally reconstructed radiographs |
url |
http://link.springer.com/article/10.1186/s13018-020-01935-9 |
work_keys_str_mv |
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