What Is the Actual 3D Representation of the Rib Vertebra Angle Difference (Mehta Angle)?
STUDY DESIGN.Cross-sectional study. OBJECTIVE.To establish the relevance of the conventional two-dimensional (2D) rib vertebra angle difference (RVAD) and the relationship with the complex three-dimensional (3D) apical morphology in scoliosis. SUMMARY OF BACKGROUND DATA.The RVAD, also known as Mehta...
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| Veröffentlicht in: | Spine (Philadelphia, Pa. 1976) Pa. 1976), 2018-01, Vol.43 (2), p.E92-E97 |
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| container_title | Spine (Philadelphia, Pa. 1976) |
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| creator | Brink, Rob C. Schlösser, Tom P.C. van Stralen, Marijn Vincken, Koen L. Kruyt, Moyo C. Chu, Winnie C.W. Cheng, Jack C.Y. Castelein, René M. |
| description | STUDY DESIGN.Cross-sectional study.
OBJECTIVE.To establish the relevance of the conventional two-dimensional (2D) rib vertebra angle difference (RVAD) and the relationship with the complex three-dimensional (3D) apical morphology in scoliosis.
SUMMARY OF BACKGROUND DATA.The RVAD, also known as Mehta angle, describes apical rib asymmetry on conventional radiographs and was introduced as a prognostic factor for curve severity in early onset scoliosis, and later applied to other types of scoliosis as well.
METHODS.An existing idiopathic scoliosis database of high-resolution computed tomography scans used in previous work, acquired for spinal navigation, was used. Eighty-eight patients (Cobb angle 46°–109°) were included. Cobb angle and 2D RVAD, as described by Mehta, were measured on the conventional radiographs and coronal digitally reconstructed radiographs (DRR) of the prone computed tomography scans. A previously validated, semiautomatic image processing technique was used to acquire complete 3D spinal reconstructions for the measurement of the 3D RVAD in a reconstructed true coronal plane, axial rotation, and sagittal morphology.
RESULTS.The 2D RVAD on the x-ray was on average 25.3° ± 11.0° and 25.6° ± 12.8° on the DRR (P = 0.990), but in the true 3D coronal view of the apex, hardly any asymmetry remained (3D RVAD3.1° ± 12.5°; 2D RVAD on x-ray and DRR vs. 3D RVADP |
| doi_str_mv | 10.1097/BRS.0000000000002225 |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_miscellaneous_1899106125</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>1899106125</sourcerecordid><originalsourceid>FETCH-LOGICAL-c4015-f51d40d1804cd06e34b372e5ccc43422aa4445be1114ee9eb3346f18d3116d763</originalsourceid><addsrcrecordid>eNqFkUtLxDAQx4Mouj6-gUiOeqhm8ui2J1nfgiKsz1tJ06mtdts1SRG_vdFdRTxoLoHJ7z9DfkPIJrBdYOlw72B8vct-HM65WiADUDyJAFS6SAZMxDziUsQrZNW5pwDFAtJlssITmSY8FQPycF9pT88d9RXSkfG9bqg4omOcWnTYeu3rrqVd-fk-rnN6h9ZjbjUdtY8N0qO6LNFia5BuX2Ll5_Wd_XWyVOrG4cb8XiO3J8c3h2fRxdXp-eHoIjKSgYpKBYVkBSRMmoLFKGQuhhyVMUYKybnWUkqVIwBIxBRzIWRcQlIIgLgYxmKNbM_6Tm330qPz2aR2BptGt9j1LoMkTYHFwFVA5Qw1tnPOYplNbT3R9i0Dln04zYLT7LfTENuaT-jzCRbfoS-JAUhmwGvXeLTuuelf0WYV6sZX__WWf0Q_sPDFsEMWBIWlsihUQIl3cqOPhw</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>1899106125</pqid></control><display><type>article</type><title>What Is the Actual 3D Representation of the Rib Vertebra Angle Difference (Mehta Angle)?</title><source>MEDLINE</source><source>Journals@Ovid Complete</source><creator>Brink, Rob C. ; Schlösser, Tom P.C. ; van Stralen, Marijn ; Vincken, Koen L. ; Kruyt, Moyo C. ; Chu, Winnie C.W. ; Cheng, Jack C.Y. ; Castelein, René M.</creator><creatorcontrib>Brink, Rob C. ; Schlösser, Tom P.C. ; van Stralen, Marijn ; Vincken, Koen L. ; Kruyt, Moyo C. ; Chu, Winnie C.W. ; Cheng, Jack C.Y. ; Castelein, René M.</creatorcontrib><description>STUDY DESIGN.Cross-sectional study.
OBJECTIVE.To establish the relevance of the conventional two-dimensional (2D) rib vertebra angle difference (RVAD) and the relationship with the complex three-dimensional (3D) apical morphology in scoliosis.
SUMMARY OF BACKGROUND DATA.The RVAD, also known as Mehta angle, describes apical rib asymmetry on conventional radiographs and was introduced as a prognostic factor for curve severity in early onset scoliosis, and later applied to other types of scoliosis as well.
METHODS.An existing idiopathic scoliosis database of high-resolution computed tomography scans used in previous work, acquired for spinal navigation, was used. Eighty-eight patients (Cobb angle 46°–109°) were included. Cobb angle and 2D RVAD, as described by Mehta, were measured on the conventional radiographs and coronal digitally reconstructed radiographs (DRR) of the prone computed tomography scans. A previously validated, semiautomatic image processing technique was used to acquire complete 3D spinal reconstructions for the measurement of the 3D RVAD in a reconstructed true coronal plane, axial rotation, and sagittal morphology.
RESULTS.The 2D RVAD on the x-ray was on average 25.3° ± 11.0° and 25.6° ± 12.8° on the DRR (P = 0.990), but in the true 3D coronal view of the apex, hardly any asymmetry remained (3D RVAD3.1° ± 12.5°; 2D RVAD on x-ray and DRR vs. 3D RVADP < 0.001). 2D apical rib asymmetry in the anatomical coronal plane did not correlate with the same RVAD measurements in the 3D reconstructed coronal plane of the rotated apex (r = 0.155; P = 0.149). A larger 2D RVAD was found to correlate linearly with increased axial rotation (r = 0.542; P < 0.001) and apical lordosis (r = 0.522; P < 0.001).
CONCLUSION.The 2D RVAD represents a projection-based composite radiographic index reflecting the severity of the complex 3D apical morphology including axial rotation and apical lordosis. It indicates a difference in severity of the apical deformation.Level of Evidence4</description><identifier>ISSN: 0362-2436</identifier><identifier>EISSN: 1528-1159</identifier><identifier>DOI: 10.1097/BRS.0000000000002225</identifier><identifier>PMID: 28498293</identifier><language>eng</language><publisher>United States: Wolters Kluwer Health, Inc. All rights reserved</publisher><subject>Adolescent ; Adult ; Child ; Cross-Sectional Studies ; Female ; Humans ; Male ; Ribs - diagnostic imaging ; Rotation ; Scoliosis - diagnostic imaging ; Spine - diagnostic imaging ; Tomography, X-Ray Computed ; Young Adult</subject><ispartof>Spine (Philadelphia, Pa. 1976), 2018-01, Vol.43 (2), p.E92-E97</ispartof><rights>Wolters Kluwer Health, Inc. All rights reserved.</rights><rights>Copyright © 2018 Wolters Kluwer Health, Inc. All rights reserved.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c4015-f51d40d1804cd06e34b372e5ccc43422aa4445be1114ee9eb3346f18d3116d763</citedby><cites>FETCH-LOGICAL-c4015-f51d40d1804cd06e34b372e5ccc43422aa4445be1114ee9eb3346f18d3116d763</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,777,781,27906,27907</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/28498293$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Brink, Rob C.</creatorcontrib><creatorcontrib>Schlösser, Tom P.C.</creatorcontrib><creatorcontrib>van Stralen, Marijn</creatorcontrib><creatorcontrib>Vincken, Koen L.</creatorcontrib><creatorcontrib>Kruyt, Moyo C.</creatorcontrib><creatorcontrib>Chu, Winnie C.W.</creatorcontrib><creatorcontrib>Cheng, Jack C.Y.</creatorcontrib><creatorcontrib>Castelein, René M.</creatorcontrib><title>What Is the Actual 3D Representation of the Rib Vertebra Angle Difference (Mehta Angle)?</title><title>Spine (Philadelphia, Pa. 1976)</title><addtitle>Spine (Phila Pa 1976)</addtitle><description>STUDY DESIGN.Cross-sectional study.
OBJECTIVE.To establish the relevance of the conventional two-dimensional (2D) rib vertebra angle difference (RVAD) and the relationship with the complex three-dimensional (3D) apical morphology in scoliosis.
SUMMARY OF BACKGROUND DATA.The RVAD, also known as Mehta angle, describes apical rib asymmetry on conventional radiographs and was introduced as a prognostic factor for curve severity in early onset scoliosis, and later applied to other types of scoliosis as well.
METHODS.An existing idiopathic scoliosis database of high-resolution computed tomography scans used in previous work, acquired for spinal navigation, was used. Eighty-eight patients (Cobb angle 46°–109°) were included. Cobb angle and 2D RVAD, as described by Mehta, were measured on the conventional radiographs and coronal digitally reconstructed radiographs (DRR) of the prone computed tomography scans. A previously validated, semiautomatic image processing technique was used to acquire complete 3D spinal reconstructions for the measurement of the 3D RVAD in a reconstructed true coronal plane, axial rotation, and sagittal morphology.
RESULTS.The 2D RVAD on the x-ray was on average 25.3° ± 11.0° and 25.6° ± 12.8° on the DRR (P = 0.990), but in the true 3D coronal view of the apex, hardly any asymmetry remained (3D RVAD3.1° ± 12.5°; 2D RVAD on x-ray and DRR vs. 3D RVADP < 0.001). 2D apical rib asymmetry in the anatomical coronal plane did not correlate with the same RVAD measurements in the 3D reconstructed coronal plane of the rotated apex (r = 0.155; P = 0.149). A larger 2D RVAD was found to correlate linearly with increased axial rotation (r = 0.542; P < 0.001) and apical lordosis (r = 0.522; P < 0.001).
CONCLUSION.The 2D RVAD represents a projection-based composite radiographic index reflecting the severity of the complex 3D apical morphology including axial rotation and apical lordosis. It indicates a difference in severity of the apical deformation.Level of Evidence4</description><subject>Adolescent</subject><subject>Adult</subject><subject>Child</subject><subject>Cross-Sectional Studies</subject><subject>Female</subject><subject>Humans</subject><subject>Male</subject><subject>Ribs - diagnostic imaging</subject><subject>Rotation</subject><subject>Scoliosis - diagnostic imaging</subject><subject>Spine - diagnostic imaging</subject><subject>Tomography, X-Ray Computed</subject><subject>Young Adult</subject><issn>0362-2436</issn><issn>1528-1159</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqFkUtLxDAQx4Mouj6-gUiOeqhm8ui2J1nfgiKsz1tJ06mtdts1SRG_vdFdRTxoLoHJ7z9DfkPIJrBdYOlw72B8vct-HM65WiADUDyJAFS6SAZMxDziUsQrZNW5pwDFAtJlssITmSY8FQPycF9pT88d9RXSkfG9bqg4omOcWnTYeu3rrqVd-fk-rnN6h9ZjbjUdtY8N0qO6LNFia5BuX2Ll5_Wd_XWyVOrG4cb8XiO3J8c3h2fRxdXp-eHoIjKSgYpKBYVkBSRMmoLFKGQuhhyVMUYKybnWUkqVIwBIxBRzIWRcQlIIgLgYxmKNbM_6Tm330qPz2aR2BptGt9j1LoMkTYHFwFVA5Qw1tnPOYplNbT3R9i0Dln04zYLT7LfTENuaT-jzCRbfoS-JAUhmwGvXeLTuuelf0WYV6sZX__WWf0Q_sPDFsEMWBIWlsihUQIl3cqOPhw</recordid><startdate>20180115</startdate><enddate>20180115</enddate><creator>Brink, Rob C.</creator><creator>Schlösser, Tom P.C.</creator><creator>van Stralen, Marijn</creator><creator>Vincken, Koen L.</creator><creator>Kruyt, Moyo C.</creator><creator>Chu, Winnie C.W.</creator><creator>Cheng, Jack C.Y.</creator><creator>Castelein, René M.</creator><general>Wolters Kluwer Health, Inc. All rights reserved</general><general>Copyright Wolters Kluwer Health, Inc. All rights reserved</general><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>20180115</creationdate><title>What Is the Actual 3D Representation of the Rib Vertebra Angle Difference (Mehta Angle)?</title><author>Brink, Rob C. ; Schlösser, Tom P.C. ; van Stralen, Marijn ; Vincken, Koen L. ; Kruyt, Moyo C. ; Chu, Winnie C.W. ; Cheng, Jack C.Y. ; Castelein, René M.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c4015-f51d40d1804cd06e34b372e5ccc43422aa4445be1114ee9eb3346f18d3116d763</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2018</creationdate><topic>Adolescent</topic><topic>Adult</topic><topic>Child</topic><topic>Cross-Sectional Studies</topic><topic>Female</topic><topic>Humans</topic><topic>Male</topic><topic>Ribs - diagnostic imaging</topic><topic>Rotation</topic><topic>Scoliosis - diagnostic imaging</topic><topic>Spine - diagnostic imaging</topic><topic>Tomography, X-Ray Computed</topic><topic>Young Adult</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Brink, Rob C.</creatorcontrib><creatorcontrib>Schlösser, Tom P.C.</creatorcontrib><creatorcontrib>van Stralen, Marijn</creatorcontrib><creatorcontrib>Vincken, Koen L.</creatorcontrib><creatorcontrib>Kruyt, Moyo C.</creatorcontrib><creatorcontrib>Chu, Winnie C.W.</creatorcontrib><creatorcontrib>Cheng, Jack C.Y.</creatorcontrib><creatorcontrib>Castelein, René M.</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>Spine (Philadelphia, Pa. 1976)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Brink, Rob C.</au><au>Schlösser, Tom P.C.</au><au>van Stralen, Marijn</au><au>Vincken, Koen L.</au><au>Kruyt, Moyo C.</au><au>Chu, Winnie C.W.</au><au>Cheng, Jack C.Y.</au><au>Castelein, René M.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>What Is the Actual 3D Representation of the Rib Vertebra Angle Difference (Mehta Angle)?</atitle><jtitle>Spine (Philadelphia, Pa. 1976)</jtitle><addtitle>Spine (Phila Pa 1976)</addtitle><date>2018-01-15</date><risdate>2018</risdate><volume>43</volume><issue>2</issue><spage>E92</spage><epage>E97</epage><pages>E92-E97</pages><issn>0362-2436</issn><eissn>1528-1159</eissn><abstract>STUDY DESIGN.Cross-sectional study.
OBJECTIVE.To establish the relevance of the conventional two-dimensional (2D) rib vertebra angle difference (RVAD) and the relationship with the complex three-dimensional (3D) apical morphology in scoliosis.
SUMMARY OF BACKGROUND DATA.The RVAD, also known as Mehta angle, describes apical rib asymmetry on conventional radiographs and was introduced as a prognostic factor for curve severity in early onset scoliosis, and later applied to other types of scoliosis as well.
METHODS.An existing idiopathic scoliosis database of high-resolution computed tomography scans used in previous work, acquired for spinal navigation, was used. Eighty-eight patients (Cobb angle 46°–109°) were included. Cobb angle and 2D RVAD, as described by Mehta, were measured on the conventional radiographs and coronal digitally reconstructed radiographs (DRR) of the prone computed tomography scans. A previously validated, semiautomatic image processing technique was used to acquire complete 3D spinal reconstructions for the measurement of the 3D RVAD in a reconstructed true coronal plane, axial rotation, and sagittal morphology.
RESULTS.The 2D RVAD on the x-ray was on average 25.3° ± 11.0° and 25.6° ± 12.8° on the DRR (P = 0.990), but in the true 3D coronal view of the apex, hardly any asymmetry remained (3D RVAD3.1° ± 12.5°; 2D RVAD on x-ray and DRR vs. 3D RVADP < 0.001). 2D apical rib asymmetry in the anatomical coronal plane did not correlate with the same RVAD measurements in the 3D reconstructed coronal plane of the rotated apex (r = 0.155; P = 0.149). A larger 2D RVAD was found to correlate linearly with increased axial rotation (r = 0.542; P < 0.001) and apical lordosis (r = 0.522; P < 0.001).
CONCLUSION.The 2D RVAD represents a projection-based composite radiographic index reflecting the severity of the complex 3D apical morphology including axial rotation and apical lordosis. It indicates a difference in severity of the apical deformation.Level of Evidence4</abstract><cop>United States</cop><pub>Wolters Kluwer Health, Inc. All rights reserved</pub><pmid>28498293</pmid><doi>10.1097/BRS.0000000000002225</doi></addata></record> |
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| subjects | Adolescent Adult Child Cross-Sectional Studies Female Humans Male Ribs - diagnostic imaging Rotation Scoliosis - diagnostic imaging Spine - diagnostic imaging Tomography, X-Ray Computed Young Adult |
| title | What Is the Actual 3D Representation of the Rib Vertebra Angle Difference (Mehta Angle)? |
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