Changes in Pelvic Incidence, Pelvic Tilt, and Sacral Slope in Situations of Pelvic Rotation
Digitally reconstructed radiograph-based study. Using a computer-based method to determine what degree of pelvic rotation is acceptable for measuring the pelvic incidence (PI), pelvic tilt (PT), and sacral slope (SS). The effectiveness of a geometrical formula used to calculate the angle of pelvic r...
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| Veröffentlicht in: | Clinical spine surgery 2017-08, Vol.30 (7), p.E923-E930 |
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| container_issue | 7 |
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| container_title | Clinical spine surgery |
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| creator | Jin, Hai-Ming Xu, Dao-Liang Xuan, Jun Chen, Jiao-Xiang Chen, Kai Goswami, Amit Chen, Yu Kong, Qiu-Yan Wang, Xiang-Yang |
| description | Digitally reconstructed radiograph-based study.
Using a computer-based method to determine what degree of pelvic rotation is acceptable for measuring the pelvic incidence (PI), pelvic tilt (PT), and sacral slope (SS). The effectiveness of a geometrical formula used to calculate the angle of pelvic rotation proposed in a previous article was assessed.
It is unclear whether PI, PT, and SS are valid with pelvic rotation while acquiring a radiograph.
Ten 3-dimensionally reconstructed models were established with software and placed in a neutral orientation to orient all of the bones in a standing position. Next, 140 digitally reconstructed radiographs were obtained by rotating the models around the longitudinal axis of each pelvis in the software from 0 to 30 degrees at 2.5-degree intervals. PI, PT, and SS were measured. The rotation angle was considered to be acceptable when the change in the measured angle (compared with the "correct" position) was |
| doi_str_mv | 10.1097/BSD.0000000000000444 |
| format | Article |
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Using a computer-based method to determine what degree of pelvic rotation is acceptable for measuring the pelvic incidence (PI), pelvic tilt (PT), and sacral slope (SS). The effectiveness of a geometrical formula used to calculate the angle of pelvic rotation proposed in a previous article was assessed.
It is unclear whether PI, PT, and SS are valid with pelvic rotation while acquiring a radiograph.
Ten 3-dimensionally reconstructed models were established with software and placed in a neutral orientation to orient all of the bones in a standing position. Next, 140 digitally reconstructed radiographs were obtained by rotating the models around the longitudinal axis of each pelvis in the software from 0 to 30 degrees at 2.5-degree intervals. PI, PT, and SS were measured. The rotation angle was considered to be acceptable when the change in the measured angle (compared with the "correct" position) was <6 degrees. The rotation angle (α) on the images was calculated by a geometrical formula. Consistency between the measured value and the set angle was assessed.
The acceptable maximum angle of rotation for reliable measurements of PI was 17.5 degrees, and the changes in PT and SS were within an acceptable range (<6 degrees) when the pelvic rotation increased from 0 to 30 degrees. The effectiveness of the geometrical formula was shown by the consistency between the set and the calculated rotation angles of the pelvis (intraclass correlation coefficient=0.99).
Our study provides insight into the influence of pelvic rotation on the PI, PT, and SS. PI changes with pelvic rotation. The acceptable maximum angle for reliable values of PI, PT, and SS was 17.5 degrees, and the rotation angle of the pelvis on a lateral spinopelvic radiograph can be calculated reliably.</description><identifier>ISSN: 2380-0186</identifier><identifier>EISSN: 2380-0194</identifier><identifier>DOI: 10.1097/BSD.0000000000000444</identifier><identifier>PMID: 27642817</identifier><language>eng</language><publisher>United States</publisher><subject>Biomechanical Phenomena ; Femur - diagnostic imaging ; Humans ; Imaging, Three-Dimensional ; Pelvis - diagnostic imaging ; Pelvis - physiology ; Rotation ; Sacrum - diagnostic imaging ; Sacrum - physiology</subject><ispartof>Clinical spine surgery, 2017-08, Vol.30 (7), p.E923-E930</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c307t-e3a560daa76283e4837eb668bda4328e4e6e9d14ced3d6bcfc4e5cebc8acc5cd3</citedby><cites>FETCH-LOGICAL-c307t-e3a560daa76283e4837eb668bda4328e4e6e9d14ced3d6bcfc4e5cebc8acc5cd3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,27901,27902</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/27642817$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Jin, Hai-Ming</creatorcontrib><creatorcontrib>Xu, Dao-Liang</creatorcontrib><creatorcontrib>Xuan, Jun</creatorcontrib><creatorcontrib>Chen, Jiao-Xiang</creatorcontrib><creatorcontrib>Chen, Kai</creatorcontrib><creatorcontrib>Goswami, Amit</creatorcontrib><creatorcontrib>Chen, Yu</creatorcontrib><creatorcontrib>Kong, Qiu-Yan</creatorcontrib><creatorcontrib>Wang, Xiang-Yang</creatorcontrib><title>Changes in Pelvic Incidence, Pelvic Tilt, and Sacral Slope in Situations of Pelvic Rotation</title><title>Clinical spine surgery</title><addtitle>Clin Spine Surg</addtitle><description>Digitally reconstructed radiograph-based study.
Using a computer-based method to determine what degree of pelvic rotation is acceptable for measuring the pelvic incidence (PI), pelvic tilt (PT), and sacral slope (SS). The effectiveness of a geometrical formula used to calculate the angle of pelvic rotation proposed in a previous article was assessed.
It is unclear whether PI, PT, and SS are valid with pelvic rotation while acquiring a radiograph.
Ten 3-dimensionally reconstructed models were established with software and placed in a neutral orientation to orient all of the bones in a standing position. Next, 140 digitally reconstructed radiographs were obtained by rotating the models around the longitudinal axis of each pelvis in the software from 0 to 30 degrees at 2.5-degree intervals. PI, PT, and SS were measured. The rotation angle was considered to be acceptable when the change in the measured angle (compared with the "correct" position) was <6 degrees. The rotation angle (α) on the images was calculated by a geometrical formula. Consistency between the measured value and the set angle was assessed.
The acceptable maximum angle of rotation for reliable measurements of PI was 17.5 degrees, and the changes in PT and SS were within an acceptable range (<6 degrees) when the pelvic rotation increased from 0 to 30 degrees. The effectiveness of the geometrical formula was shown by the consistency between the set and the calculated rotation angles of the pelvis (intraclass correlation coefficient=0.99).
Our study provides insight into the influence of pelvic rotation on the PI, PT, and SS. PI changes with pelvic rotation. The acceptable maximum angle for reliable values of PI, PT, and SS was 17.5 degrees, and the rotation angle of the pelvis on a lateral spinopelvic radiograph can be calculated reliably.</description><subject>Biomechanical Phenomena</subject><subject>Femur - diagnostic imaging</subject><subject>Humans</subject><subject>Imaging, Three-Dimensional</subject><subject>Pelvis - diagnostic imaging</subject><subject>Pelvis - physiology</subject><subject>Rotation</subject><subject>Sacrum - diagnostic imaging</subject><subject>Sacrum - physiology</subject><issn>2380-0186</issn><issn>2380-0194</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNpdkE1Lw0AQhhdRbKn9ByI5ejB1v7K7OWr9KhQUU08ewmZ3oitptmYTwX9vaj8Q5zLD8Lwz8CB0SvCE4FReXmc3E_y3OOcHaEiZwjEmKT_cz0oM0DiEj54hgknCkmM0oFJwqogcotfpu67fIESujp6g-nImmtXGWagNXOw2C1e1F5GubZRp0-gqyiq_gnUkc22nW-frEPlyhz_79nd3go5KXQUYb_sIvdzdLqYP8fzxfja9mseGYdnGwHQisNVaCqoYcMUkFEKowmrOqAIOAlJLuAHLrChMaTgkBgqjtDGJsWyEzjd3V43_7CC0-dIFA1Wla_BdyIlKUkkpoaxH-QY1jQ-hgTJfNW6pm--c4HxtNu_N5v_N9rGz7YeuWILdh3Ye2Q8jHnPE</recordid><startdate>20170801</startdate><enddate>20170801</enddate><creator>Jin, Hai-Ming</creator><creator>Xu, Dao-Liang</creator><creator>Xuan, Jun</creator><creator>Chen, Jiao-Xiang</creator><creator>Chen, Kai</creator><creator>Goswami, Amit</creator><creator>Chen, Yu</creator><creator>Kong, Qiu-Yan</creator><creator>Wang, Xiang-Yang</creator><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>20170801</creationdate><title>Changes in Pelvic Incidence, Pelvic Tilt, and Sacral Slope in Situations of Pelvic Rotation</title><author>Jin, Hai-Ming ; Xu, Dao-Liang ; Xuan, Jun ; Chen, Jiao-Xiang ; Chen, Kai ; Goswami, Amit ; Chen, Yu ; Kong, Qiu-Yan ; Wang, Xiang-Yang</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c307t-e3a560daa76283e4837eb668bda4328e4e6e9d14ced3d6bcfc4e5cebc8acc5cd3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2017</creationdate><topic>Biomechanical Phenomena</topic><topic>Femur - diagnostic imaging</topic><topic>Humans</topic><topic>Imaging, Three-Dimensional</topic><topic>Pelvis - diagnostic imaging</topic><topic>Pelvis - physiology</topic><topic>Rotation</topic><topic>Sacrum - diagnostic imaging</topic><topic>Sacrum - physiology</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Jin, Hai-Ming</creatorcontrib><creatorcontrib>Xu, Dao-Liang</creatorcontrib><creatorcontrib>Xuan, Jun</creatorcontrib><creatorcontrib>Chen, Jiao-Xiang</creatorcontrib><creatorcontrib>Chen, Kai</creatorcontrib><creatorcontrib>Goswami, Amit</creatorcontrib><creatorcontrib>Chen, Yu</creatorcontrib><creatorcontrib>Kong, Qiu-Yan</creatorcontrib><creatorcontrib>Wang, Xiang-Yang</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Clinical spine surgery</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Jin, Hai-Ming</au><au>Xu, Dao-Liang</au><au>Xuan, Jun</au><au>Chen, Jiao-Xiang</au><au>Chen, Kai</au><au>Goswami, Amit</au><au>Chen, Yu</au><au>Kong, Qiu-Yan</au><au>Wang, Xiang-Yang</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Changes in Pelvic Incidence, Pelvic Tilt, and Sacral Slope in Situations of Pelvic Rotation</atitle><jtitle>Clinical spine surgery</jtitle><addtitle>Clin Spine Surg</addtitle><date>2017-08-01</date><risdate>2017</risdate><volume>30</volume><issue>7</issue><spage>E923</spage><epage>E930</epage><pages>E923-E930</pages><issn>2380-0186</issn><eissn>2380-0194</eissn><abstract>Digitally reconstructed radiograph-based study.
Using a computer-based method to determine what degree of pelvic rotation is acceptable for measuring the pelvic incidence (PI), pelvic tilt (PT), and sacral slope (SS). The effectiveness of a geometrical formula used to calculate the angle of pelvic rotation proposed in a previous article was assessed.
It is unclear whether PI, PT, and SS are valid with pelvic rotation while acquiring a radiograph.
Ten 3-dimensionally reconstructed models were established with software and placed in a neutral orientation to orient all of the bones in a standing position. Next, 140 digitally reconstructed radiographs were obtained by rotating the models around the longitudinal axis of each pelvis in the software from 0 to 30 degrees at 2.5-degree intervals. PI, PT, and SS were measured. The rotation angle was considered to be acceptable when the change in the measured angle (compared with the "correct" position) was <6 degrees. The rotation angle (α) on the images was calculated by a geometrical formula. Consistency between the measured value and the set angle was assessed.
The acceptable maximum angle of rotation for reliable measurements of PI was 17.5 degrees, and the changes in PT and SS were within an acceptable range (<6 degrees) when the pelvic rotation increased from 0 to 30 degrees. The effectiveness of the geometrical formula was shown by the consistency between the set and the calculated rotation angles of the pelvis (intraclass correlation coefficient=0.99).
Our study provides insight into the influence of pelvic rotation on the PI, PT, and SS. PI changes with pelvic rotation. The acceptable maximum angle for reliable values of PI, PT, and SS was 17.5 degrees, and the rotation angle of the pelvis on a lateral spinopelvic radiograph can be calculated reliably.</abstract><cop>United States</cop><pmid>27642817</pmid><doi>10.1097/BSD.0000000000000444</doi></addata></record> |
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| subjects | Biomechanical Phenomena Femur - diagnostic imaging Humans Imaging, Three-Dimensional Pelvis - diagnostic imaging Pelvis - physiology Rotation Sacrum - diagnostic imaging Sacrum - physiology |
| title | Changes in Pelvic Incidence, Pelvic Tilt, and Sacral Slope in Situations of Pelvic Rotation |
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