Sectional measurements of shoulder muscle volume and computed tomography density in anterior shoulder instability
Abstract In patients with anterior shoulder instability (ASI), a chronic imbalance might exist between the anterior and posterior shoulder muscles (i.e., subscapular [Ssc] vs. infraspinatus and teres minor [Isp + TM]). The balance could be evaluated as the ratio of volume (VR Ssc/Isp+TM) and compute...
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Nature Portfolio
2024-11-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-024-79065-z |
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| author | Keita Nagawa Yuki Hara Hirokazu Shimizu Koichiro Matsuura Kaiji Inoue Eito Kozawa Katsunobu Sakaguchi Mamoru Niitsu |
| author_facet | Keita Nagawa Yuki Hara Hirokazu Shimizu Koichiro Matsuura Kaiji Inoue Eito Kozawa Katsunobu Sakaguchi Mamoru Niitsu |
| author_sort | Keita Nagawa |
| collection | DOAJ |
| description | Abstract In patients with anterior shoulder instability (ASI), a chronic imbalance might exist between the anterior and posterior shoulder muscles (i.e., subscapular [Ssc] vs. infraspinatus and teres minor [Isp + TM]). The balance could be evaluated as the ratio of volume (VR Ssc/Isp+TM) and computed tomography density (CT-DR Ssc/Isp+TM) using a 3D sectional approach. A total of 28 CT images (19 patients) of non-pathological shoulders (clavicular fracture [CF]) and 17 CT images (17 patients) of ASI were used. Segmentation of Ssc and Isp + TM muscles was performed; the reconstructed models were separated by the Y-view plane and the planes situated 2.5 cm and 5 cm medial to the Y-view plane to generate muscle models. VR Ssc/Isp+TM and CT-DR Ssc/Isp+TM were measured in each section of both the groups, as well as in whole muscle measurements in the CF group. VR Ssc/Isp+TM and CT-DR Ssc/Isp+TM obtained through a 3D sectional approach in the CF group were comparable to the whole muscle measurements, with a value of 1.06 for both. In the ASI group, the VR Ssc/Isp+TM was higher, whereas the CT-DR Ssc/Isp+TM was lower than those in the CF group. The VR Ssc/Isp+TM and CT-DR Ssc/Isp+TM appeared to be balanced in the CF group. However an imbalance was observed in the ASI group. Our 3D sectional measurement approach has the potential to assess the balance between the anterior and posterior shoulder muscles in ASI. |
| format | Article |
| id | doaj-art-9668686f2bd741f79a1961d8e3178c5c |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj-art-9668686f2bd741f79a1961d8e3178c5c2024-11-10T12:27:17ZengNature PortfolioScientific Reports2045-23222024-11-0114111010.1038/s41598-024-79065-zSectional measurements of shoulder muscle volume and computed tomography density in anterior shoulder instabilityKeita Nagawa0Yuki Hara1Hirokazu Shimizu2Koichiro Matsuura3Kaiji Inoue4Eito Kozawa5Katsunobu Sakaguchi6Mamoru Niitsu7Department of Radiology, Saitama Medical UniversityDepartment of Radiology, Saitama Medical UniversityDepartment of Radiology, Saitama Medical UniversityDepartment of Radiology, Saitama Medical UniversityDepartment of Radiology, Saitama Medical UniversityDepartment of Radiology, Saitama Medical UniversityDepartment of Orthopedics, Saitama Medical UniversityDepartment of Radiology, Saitama Medical UniversityAbstract In patients with anterior shoulder instability (ASI), a chronic imbalance might exist between the anterior and posterior shoulder muscles (i.e., subscapular [Ssc] vs. infraspinatus and teres minor [Isp + TM]). The balance could be evaluated as the ratio of volume (VR Ssc/Isp+TM) and computed tomography density (CT-DR Ssc/Isp+TM) using a 3D sectional approach. A total of 28 CT images (19 patients) of non-pathological shoulders (clavicular fracture [CF]) and 17 CT images (17 patients) of ASI were used. Segmentation of Ssc and Isp + TM muscles was performed; the reconstructed models were separated by the Y-view plane and the planes situated 2.5 cm and 5 cm medial to the Y-view plane to generate muscle models. VR Ssc/Isp+TM and CT-DR Ssc/Isp+TM were measured in each section of both the groups, as well as in whole muscle measurements in the CF group. VR Ssc/Isp+TM and CT-DR Ssc/Isp+TM obtained through a 3D sectional approach in the CF group were comparable to the whole muscle measurements, with a value of 1.06 for both. In the ASI group, the VR Ssc/Isp+TM was higher, whereas the CT-DR Ssc/Isp+TM was lower than those in the CF group. The VR Ssc/Isp+TM and CT-DR Ssc/Isp+TM appeared to be balanced in the CF group. However an imbalance was observed in the ASI group. Our 3D sectional measurement approach has the potential to assess the balance between the anterior and posterior shoulder muscles in ASI.https://doi.org/10.1038/s41598-024-79065-z |
| spellingShingle | Keita Nagawa Yuki Hara Hirokazu Shimizu Koichiro Matsuura Kaiji Inoue Eito Kozawa Katsunobu Sakaguchi Mamoru Niitsu Sectional measurements of shoulder muscle volume and computed tomography density in anterior shoulder instability Scientific Reports |
| title | Sectional measurements of shoulder muscle volume and computed tomography density in anterior shoulder instability |
| title_full | Sectional measurements of shoulder muscle volume and computed tomography density in anterior shoulder instability |
| title_fullStr | Sectional measurements of shoulder muscle volume and computed tomography density in anterior shoulder instability |
| title_full_unstemmed | Sectional measurements of shoulder muscle volume and computed tomography density in anterior shoulder instability |
| title_short | Sectional measurements of shoulder muscle volume and computed tomography density in anterior shoulder instability |
| title_sort | sectional measurements of shoulder muscle volume and computed tomography density in anterior shoulder instability |
| url | https://doi.org/10.1038/s41598-024-79065-z |
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