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Comparison of Three Methods to Quantify Repair Cartilage Collagen Orientation
OBJECTIVE: The aim of this study was to determine if the noninvasive or minimally invasive and nondestructive imaging techniques of quantitative T2-mapping or multiphoton microscopy (MPM) respectively, could detect differences in cartilage collagen orientation similar to polarized light microscopy (...
Autores principales: | , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
SAGE Publications
2013
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4297104/ https://www.ncbi.nlm.nih.gov/pubmed/26069654 http://dx.doi.org/10.1177/1947603512461440 |
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author | Ross, Keir A. Williams, Rebecca M. Schnabel, Lauren V. Mohammed, Hussni O. Potter, Hollis G. Bradica, Gino Castiglione, Emme Pownder, Sarah L. Satchell, Patrick W. Saska, Ryan A. Fortier, Lisa A. |
author_facet | Ross, Keir A. Williams, Rebecca M. Schnabel, Lauren V. Mohammed, Hussni O. Potter, Hollis G. Bradica, Gino Castiglione, Emme Pownder, Sarah L. Satchell, Patrick W. Saska, Ryan A. Fortier, Lisa A. |
author_sort | Ross, Keir A. |
collection | PubMed |
description | OBJECTIVE: The aim of this study was to determine if the noninvasive or minimally invasive and nondestructive imaging techniques of quantitative T2-mapping or multiphoton microscopy (MPM) respectively, could detect differences in cartilage collagen orientation similar to polarized light microscopy (PLM). It was hypothesized that MRI, MPM, and PLM would all detect quantitative differences between repair and normal cartilage tissue. METHODS: Osteochondral defects in the medial femoral condyle were created and repaired in 5 mature goats. Postmortem, MRI with T2-mapping and histology were performed. T2 maps were generated and a mean T2 value was calculated for each region of interest. Histologic slides were assessed using MPM with measurements of autocorrelation ellipticity, and by PLM with application of a validated scoring method. Collagen orientation using each of the 3 modalities (T2-mapping, MPM, and PLM) was measured in the center of the repair tissue and compared to remote, normal cartilage. RESULTS: MRI, MPM, and PLM were able to detect a significant difference between repair and normal cartilage (n = 5). The average T2 value was longer for repair tissue (41.43 ± 9.81 ms) compared with normal cartilage (27.12 ± 14.22 ms; P = 0.04); MPM autocorrelation ellipticity was higher in fibrous tissue (3.75 ± 1.17) compared with normal cartilage (2.24 ± 0.51; P = 0.01); the average PLM score for repair tissue was lower (1.6 ± 1.02) than the score for remote normal cartilage (4.4 ± 0.42; P = 0.002). The strongest correlation among the methods was between MRI and PLM (r = −0.76; P = 0.01), followed by MPM and PLM (r = −0.58; P = 0.08), with the weakest correlation shown between MRI and MPM (r = 0.35; P = 0.31). CONCLUSION: All 3 imaging methods quantitatively measured differences in collagen orientation between repair and normal cartilage, but at very different levels of resolution. PLM is destructive to tissue and requires euthanasia, but because MPM can be used arthroscopically, both T2-mapping and MPM can be performed in vivo, offering nondestructive means to assess collagen orientation that could be used to obtain longitudinal data in cartilage repair studies. |
format | Online Article Text |
id | pubmed-4297104 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2013 |
publisher | SAGE Publications |
record_format | MEDLINE/PubMed |
spelling | pubmed-42971042015-06-11 Comparison of Three Methods to Quantify Repair Cartilage Collagen Orientation Ross, Keir A. Williams, Rebecca M. Schnabel, Lauren V. Mohammed, Hussni O. Potter, Hollis G. Bradica, Gino Castiglione, Emme Pownder, Sarah L. Satchell, Patrick W. Saska, Ryan A. Fortier, Lisa A. Cartilage Article OBJECTIVE: The aim of this study was to determine if the noninvasive or minimally invasive and nondestructive imaging techniques of quantitative T2-mapping or multiphoton microscopy (MPM) respectively, could detect differences in cartilage collagen orientation similar to polarized light microscopy (PLM). It was hypothesized that MRI, MPM, and PLM would all detect quantitative differences between repair and normal cartilage tissue. METHODS: Osteochondral defects in the medial femoral condyle were created and repaired in 5 mature goats. Postmortem, MRI with T2-mapping and histology were performed. T2 maps were generated and a mean T2 value was calculated for each region of interest. Histologic slides were assessed using MPM with measurements of autocorrelation ellipticity, and by PLM with application of a validated scoring method. Collagen orientation using each of the 3 modalities (T2-mapping, MPM, and PLM) was measured in the center of the repair tissue and compared to remote, normal cartilage. RESULTS: MRI, MPM, and PLM were able to detect a significant difference between repair and normal cartilage (n = 5). The average T2 value was longer for repair tissue (41.43 ± 9.81 ms) compared with normal cartilage (27.12 ± 14.22 ms; P = 0.04); MPM autocorrelation ellipticity was higher in fibrous tissue (3.75 ± 1.17) compared with normal cartilage (2.24 ± 0.51; P = 0.01); the average PLM score for repair tissue was lower (1.6 ± 1.02) than the score for remote normal cartilage (4.4 ± 0.42; P = 0.002). The strongest correlation among the methods was between MRI and PLM (r = −0.76; P = 0.01), followed by MPM and PLM (r = −0.58; P = 0.08), with the weakest correlation shown between MRI and MPM (r = 0.35; P = 0.31). CONCLUSION: All 3 imaging methods quantitatively measured differences in collagen orientation between repair and normal cartilage, but at very different levels of resolution. PLM is destructive to tissue and requires euthanasia, but because MPM can be used arthroscopically, both T2-mapping and MPM can be performed in vivo, offering nondestructive means to assess collagen orientation that could be used to obtain longitudinal data in cartilage repair studies. SAGE Publications 2013-04 /pmc/articles/PMC4297104/ /pubmed/26069654 http://dx.doi.org/10.1177/1947603512461440 Text en © The Author(s) 2012 |
spellingShingle | Article Ross, Keir A. Williams, Rebecca M. Schnabel, Lauren V. Mohammed, Hussni O. Potter, Hollis G. Bradica, Gino Castiglione, Emme Pownder, Sarah L. Satchell, Patrick W. Saska, Ryan A. Fortier, Lisa A. Comparison of Three Methods to Quantify Repair Cartilage Collagen Orientation |
title | Comparison of Three Methods to Quantify Repair Cartilage Collagen Orientation |
title_full | Comparison of Three Methods to Quantify Repair Cartilage Collagen Orientation |
title_fullStr | Comparison of Three Methods to Quantify Repair Cartilage Collagen Orientation |
title_full_unstemmed | Comparison of Three Methods to Quantify Repair Cartilage Collagen Orientation |
title_short | Comparison of Three Methods to Quantify Repair Cartilage Collagen Orientation |
title_sort | comparison of three methods to quantify repair cartilage collagen orientation |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4297104/ https://www.ncbi.nlm.nih.gov/pubmed/26069654 http://dx.doi.org/10.1177/1947603512461440 |
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