Post-processing water-fat imaging technique for fat suppression in a low-field MR imaging system, evaluation in patients with rheumatoid arthritis
To evaluate the feasibility of the phase difference-based post-processing water-fat imaging method for fat suppression at low-field in imaging of arthritic joints. Thirty joints (wrist, 10; elbow, 10; knee, 10) in 30 patients with rheumatoid arthritis were imaged using a 0.23T MRI unit. Contrast-enh...
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| Veröffentlicht in: | Magma (New York, N.Y.) N.Y.), 2002-11, Vol.15 (1-3), p.1-9 |
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| creator | Palosaari, Kari Tervonen, Osmo |
| description | To evaluate the feasibility of the phase difference-based post-processing water-fat imaging method for fat suppression at low-field in imaging of arthritic joints.
Thirty joints (wrist, 10; elbow, 10; knee, 10) in 30 patients with rheumatoid arthritis were imaged using a 0.23T MRI unit. Contrast-enhanced T1-weighted (T1w) three-dimensional (3D) gradient-echo (GRE) images with and without fat suppression along with short inversion time inversion-recovery (STIR) images were evaluated by two radiologists. Contrast-enhanced T1w 3D GRE images and corresponding post-processed fat-suppressed images were scored for conspicuity and delineation of enhancing synovial hypertrophy. The uniformity of fat suppression was evaluated between T1w 3D GRE fat-suppressed images and STIR images, and general image quality was estimated for all of the three techniques by consensus. For a quantitative analysis, the enhancing synovial hypertrophy-to-fat contrast-to-noise (CNR) values for the T1W 3D GRE images with and without fat suppression were measured. For comparison, synovial bright signal-to-fat CNR values for the STIR images were measured.
The post-processing water-fat imaging technique for fat suppression was successfully applied in all examinations. Conspicuity and delineation of enhancing tissue were superior in fat-suppressed T1w 3D GRE images compared to non-fat-suppressed images (P < 0.0001). As expected, the enhancing synovial hypertrophy tissue-to-fat CNRs were significantly higher in fat-suppressed T1w 3D GRE images compared to non-fat-suppressed images (P < 0.0001). General image quality was assessed to be best in non-fat-suppressed images, and the difference was significant compared to fat-suppressed images (P < 0.05) and STIR images (P < 0.05).
The phase difference-based post-processing water-fat imaging technique for fat suppression can be successfully used at low-field, and it provides high-quality fat suppression images in imaging of arthritic joints. |
| doi_str_mv | 10.1007/BF02693838 |
| format | Article |
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Thirty joints (wrist, 10; elbow, 10; knee, 10) in 30 patients with rheumatoid arthritis were imaged using a 0.23T MRI unit. Contrast-enhanced T1-weighted (T1w) three-dimensional (3D) gradient-echo (GRE) images with and without fat suppression along with short inversion time inversion-recovery (STIR) images were evaluated by two radiologists. Contrast-enhanced T1w 3D GRE images and corresponding post-processed fat-suppressed images were scored for conspicuity and delineation of enhancing synovial hypertrophy. The uniformity of fat suppression was evaluated between T1w 3D GRE fat-suppressed images and STIR images, and general image quality was estimated for all of the three techniques by consensus. For a quantitative analysis, the enhancing synovial hypertrophy-to-fat contrast-to-noise (CNR) values for the T1W 3D GRE images with and without fat suppression were measured. For comparison, synovial bright signal-to-fat CNR values for the STIR images were measured.
The post-processing water-fat imaging technique for fat suppression was successfully applied in all examinations. Conspicuity and delineation of enhancing tissue were superior in fat-suppressed T1w 3D GRE images compared to non-fat-suppressed images (P < 0.0001). As expected, the enhancing synovial hypertrophy tissue-to-fat CNRs were significantly higher in fat-suppressed T1w 3D GRE images compared to non-fat-suppressed images (P < 0.0001). General image quality was assessed to be best in non-fat-suppressed images, and the difference was significant compared to fat-suppressed images (P < 0.05) and STIR images (P < 0.05).
The phase difference-based post-processing water-fat imaging technique for fat suppression can be successfully used at low-field, and it provides high-quality fat suppression images in imaging of arthritic joints.</description><identifier>ISSN: 0968-5243</identifier><identifier>EISSN: 1352-8661</identifier><identifier>DOI: 10.1007/BF02693838</identifier><identifier>PMID: 12413559</identifier><language>eng</language><publisher>Germany</publisher><subject>Adipose Tissue - pathology ; Arthritis, Rheumatoid - diagnosis ; Elbow Joint - pathology ; Electromagnetic Phenomena - methods ; Female ; Humans ; Image Enhancement - methods ; Imaging, Three-Dimensional - methods ; Joints - pathology ; Knee Joint - pathology ; Magnetic Resonance Imaging - methods ; Male ; Middle Aged ; Quality Control ; Sensitivity and Specificity ; Water ; Wrist Joint - pathology</subject><ispartof>Magma (New York, N.Y.), 2002-11, Vol.15 (1-3), p.1-9</ispartof><rights>Copyright 2002 Elsevier Science B.V.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c283t-e54a85e633ac8b5962fa1db9880ba934ec6ad5a80eb368c25c36eb86fcc105f23</citedby><cites>FETCH-LOGICAL-c283t-e54a85e633ac8b5962fa1db9880ba934ec6ad5a80eb368c25c36eb86fcc105f23</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/12413559$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Palosaari, Kari</creatorcontrib><creatorcontrib>Tervonen, Osmo</creatorcontrib><title>Post-processing water-fat imaging technique for fat suppression in a low-field MR imaging system, evaluation in patients with rheumatoid arthritis</title><title>Magma (New York, N.Y.)</title><addtitle>MAGMA</addtitle><description>To evaluate the feasibility of the phase difference-based post-processing water-fat imaging method for fat suppression at low-field in imaging of arthritic joints.
Thirty joints (wrist, 10; elbow, 10; knee, 10) in 30 patients with rheumatoid arthritis were imaged using a 0.23T MRI unit. Contrast-enhanced T1-weighted (T1w) three-dimensional (3D) gradient-echo (GRE) images with and without fat suppression along with short inversion time inversion-recovery (STIR) images were evaluated by two radiologists. Contrast-enhanced T1w 3D GRE images and corresponding post-processed fat-suppressed images were scored for conspicuity and delineation of enhancing synovial hypertrophy. The uniformity of fat suppression was evaluated between T1w 3D GRE fat-suppressed images and STIR images, and general image quality was estimated for all of the three techniques by consensus. For a quantitative analysis, the enhancing synovial hypertrophy-to-fat contrast-to-noise (CNR) values for the T1W 3D GRE images with and without fat suppression were measured. For comparison, synovial bright signal-to-fat CNR values for the STIR images were measured.
The post-processing water-fat imaging technique for fat suppression was successfully applied in all examinations. Conspicuity and delineation of enhancing tissue were superior in fat-suppressed T1w 3D GRE images compared to non-fat-suppressed images (P < 0.0001). As expected, the enhancing synovial hypertrophy tissue-to-fat CNRs were significantly higher in fat-suppressed T1w 3D GRE images compared to non-fat-suppressed images (P < 0.0001). General image quality was assessed to be best in non-fat-suppressed images, and the difference was significant compared to fat-suppressed images (P < 0.05) and STIR images (P < 0.05).
The phase difference-based post-processing water-fat imaging technique for fat suppression can be successfully used at low-field, and it provides high-quality fat suppression images in imaging of arthritic joints.</description><subject>Adipose Tissue - pathology</subject><subject>Arthritis, Rheumatoid - diagnosis</subject><subject>Elbow Joint - pathology</subject><subject>Electromagnetic Phenomena - methods</subject><subject>Female</subject><subject>Humans</subject><subject>Image Enhancement - methods</subject><subject>Imaging, Three-Dimensional - methods</subject><subject>Joints - pathology</subject><subject>Knee Joint - pathology</subject><subject>Magnetic Resonance Imaging - methods</subject><subject>Male</subject><subject>Middle Aged</subject><subject>Quality Control</subject><subject>Sensitivity and Specificity</subject><subject>Water</subject><subject>Wrist Joint - pathology</subject><issn>0968-5243</issn><issn>1352-8661</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2002</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNpFkctOwzAQRS0EoqWw4QOQVywQAT9i11lCRQGpCIRgHTnOpDXKC9uh6m_wxSRqRVczmjlzpTsXoXNKbigh09v7OWEy4YqrAzSmXLBISUkP0ZgkUkWCxXyETrz_IoRRQfgxGlEW95xIxuj3rfEhal1jwHtbL_FaB3BRoQO2lV4OkwBmVdvvDnDRODxsfNe2buCbGtsaa1w266iwUOb45f3_zm98gOoaw48uOx12cNt3UAeP1zassFtBV-nQ2BxrF1bOButP0VGhSw9nuzpBn_OHj9lTtHh9fJ7dLSLDFA8RiFgrAZJzbVQmEskKTfMsUYpkOuExGKlzoRWBjEtlmDBcQqZkYQwlomB8gi63ur373p0PaWW9gbLUNTSdT6dMxjEVtAevtqBxjfcOirR1vUm3SSlJhwTSfQI9fLFT7bIK8j26ezn_A_5YhDU</recordid><startdate>200211</startdate><enddate>200211</enddate><creator>Palosaari, Kari</creator><creator>Tervonen, Osmo</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>200211</creationdate><title>Post-processing water-fat imaging technique for fat suppression in a low-field MR imaging system, evaluation in patients with rheumatoid arthritis</title><author>Palosaari, Kari ; Tervonen, Osmo</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c283t-e54a85e633ac8b5962fa1db9880ba934ec6ad5a80eb368c25c36eb86fcc105f23</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2002</creationdate><topic>Adipose Tissue - pathology</topic><topic>Arthritis, Rheumatoid - diagnosis</topic><topic>Elbow Joint - pathology</topic><topic>Electromagnetic Phenomena - methods</topic><topic>Female</topic><topic>Humans</topic><topic>Image Enhancement - methods</topic><topic>Imaging, Three-Dimensional - methods</topic><topic>Joints - pathology</topic><topic>Knee Joint - pathology</topic><topic>Magnetic Resonance Imaging - methods</topic><topic>Male</topic><topic>Middle Aged</topic><topic>Quality Control</topic><topic>Sensitivity and Specificity</topic><topic>Water</topic><topic>Wrist Joint - pathology</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Palosaari, Kari</creatorcontrib><creatorcontrib>Tervonen, Osmo</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>Magma (New York, N.Y.)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Palosaari, Kari</au><au>Tervonen, Osmo</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Post-processing water-fat imaging technique for fat suppression in a low-field MR imaging system, evaluation in patients with rheumatoid arthritis</atitle><jtitle>Magma (New York, N.Y.)</jtitle><addtitle>MAGMA</addtitle><date>2002-11</date><risdate>2002</risdate><volume>15</volume><issue>1-3</issue><spage>1</spage><epage>9</epage><pages>1-9</pages><issn>0968-5243</issn><eissn>1352-8661</eissn><abstract>To evaluate the feasibility of the phase difference-based post-processing water-fat imaging method for fat suppression at low-field in imaging of arthritic joints.
Thirty joints (wrist, 10; elbow, 10; knee, 10) in 30 patients with rheumatoid arthritis were imaged using a 0.23T MRI unit. Contrast-enhanced T1-weighted (T1w) three-dimensional (3D) gradient-echo (GRE) images with and without fat suppression along with short inversion time inversion-recovery (STIR) images were evaluated by two radiologists. Contrast-enhanced T1w 3D GRE images and corresponding post-processed fat-suppressed images were scored for conspicuity and delineation of enhancing synovial hypertrophy. The uniformity of fat suppression was evaluated between T1w 3D GRE fat-suppressed images and STIR images, and general image quality was estimated for all of the three techniques by consensus. For a quantitative analysis, the enhancing synovial hypertrophy-to-fat contrast-to-noise (CNR) values for the T1W 3D GRE images with and without fat suppression were measured. For comparison, synovial bright signal-to-fat CNR values for the STIR images were measured.
The post-processing water-fat imaging technique for fat suppression was successfully applied in all examinations. Conspicuity and delineation of enhancing tissue were superior in fat-suppressed T1w 3D GRE images compared to non-fat-suppressed images (P < 0.0001). As expected, the enhancing synovial hypertrophy tissue-to-fat CNRs were significantly higher in fat-suppressed T1w 3D GRE images compared to non-fat-suppressed images (P < 0.0001). General image quality was assessed to be best in non-fat-suppressed images, and the difference was significant compared to fat-suppressed images (P < 0.05) and STIR images (P < 0.05).
The phase difference-based post-processing water-fat imaging technique for fat suppression can be successfully used at low-field, and it provides high-quality fat suppression images in imaging of arthritic joints.</abstract><cop>Germany</cop><pmid>12413559</pmid><doi>10.1007/BF02693838</doi><tpages>9</tpages></addata></record> |
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| subjects | Adipose Tissue - pathology Arthritis, Rheumatoid - diagnosis Elbow Joint - pathology Electromagnetic Phenomena - methods Female Humans Image Enhancement - methods Imaging, Three-Dimensional - methods Joints - pathology Knee Joint - pathology Magnetic Resonance Imaging - methods Male Middle Aged Quality Control Sensitivity and Specificity Water Wrist Joint - pathology |
| title | Post-processing water-fat imaging technique for fat suppression in a low-field MR imaging system, evaluation in patients with rheumatoid arthritis |
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