Ahmad A Toubasi, Dhairya A Lakhani, Gary Cutter, Caroline Gheen, Taegan Vinarsky, Eric Brian, Joy Derwenskus, James E Eaton, Richard D Dortch, Junzhong Xu, Francesca Bagnato
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However, establishing their accuracy in identifying tissue injury is essential for clinical translation.</p><p><strong>Purpose: </strong>To compare the accuracy and Cohen's effect size (ES) of PSR and RD in detecting and quantifying tissue injury in early MS.</p><p><strong>Study type: </strong>Cross-sectional prospective study.</p><p><strong>Subjects: </strong>Fourty-three subjects with newly diagnosed MS (mean age 38 ± 11 years, 70% females) and 18 age- and sex-matched healthy controls (HCs; age 38 ± 12 years, 62.5% females).</p><p><strong>Field strength/sequence: </strong>3-T MRI using T<sub>1</sub>-weighted (T<sub>1</sub>-w) turbo spin echo, T<sub>2</sub>-w fluid-attenuated inversion recovery (FLAIR), DTI, and SIR-qMT sequences.</p><p><strong>Assessment: </strong>T<sub>2</sub>-lesions were identified as hyperintense on T<sub>2</sub>-w-FLAIR, and chronic black holes (cBHs) by simultaneous T<sub>2</sub>-w-FLAIR hyperintensity and T<sub>1</sub>-w hypointensity. Regions of interest (ROIs) in normal-appearing white matter (NAWM) were classified as proximal (p) or distant (d) to lesions, while normal white matter (NWM) was identified in HCs. PSR and RD values of T<sub>2</sub>-lesions and cBHs were compared to their matched p/dNAWM and NWM in HCs. Comparisons were also made between T<sub>2</sub>-lesions and cBHs.</p><p><strong>Statistical tests: </strong>Receiver operating characteristic curves evaluated metric accuracy, and paired t tests compared ES values of PSR and RD, with significance set at P < 0.050.</p><p><strong>Results: </strong>We identified 823 T<sub>2</sub>-lesions, 392 cBHs, 426 p-, and 213 d-NAWM ROIs in patients, and 162 NWM ROIs in HCs. PSR differed significantly in all comparisons, while RD was differed in all except cBHs vs. T<sub>2</sub>-lesions (P = 0.051). PSR had significantly higher accuracy in differentiating T<sub>2</sub>-lesions from p/dNAWM and NWM, with a larger ES when comparing T<sub>2</sub>-lesions to p/dNAWM and NWM and cBHs to pNAWM and NWM.</p><p><strong>Data conclusion: </strong>PSR offers superior accuracy and ES over RD in detecting tissue injury in MS.</p><p><strong>Level of evidence: </strong>1 TECHNICAL EFFICACY: Stage 2.</p>","PeriodicalId":16140,"journal":{"name":"Journal of Magnetic Resonance Imaging","volume":" ","pages":""},"PeriodicalIF":3.3000,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Improving the Detection of Myelin Integrity in Multiple Sclerosis Using Selective Inversion Recovery for MRI With Quantitative Magnetization Transfer.\",\"authors\":\"Ahmad A Toubasi, Dhairya A Lakhani, Gary Cutter, Caroline Gheen, Taegan Vinarsky, Eric Brian, Joy Derwenskus, James E Eaton, Richard D Dortch, Junzhong Xu, Francesca Bagnato\",\"doi\":\"10.1002/jmri.29666\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><strong>Background: </strong>Selective inversion recovery quantitative magnetization transfer (SIR-qMT)-derived macromolecular to free water pool size ratio (PSR) and diffusion tensor imaging (DTI)-derived radial diffusivity (RD) are potential metrics for assessing myelin integrity in multiple sclerosis (MS). However, establishing their accuracy in identifying tissue injury is essential for clinical translation.</p><p><strong>Purpose: </strong>To compare the accuracy and Cohen's effect size (ES) of PSR and RD in detecting and quantifying tissue injury in early MS.</p><p><strong>Study type: </strong>Cross-sectional prospective study.</p><p><strong>Subjects: </strong>Fourty-three subjects with newly diagnosed MS (mean age 38 ± 11 years, 70% females) and 18 age- and sex-matched healthy controls (HCs; age 38 ± 12 years, 62.5% females).</p><p><strong>Field strength/sequence: </strong>3-T MRI using T<sub>1</sub>-weighted (T<sub>1</sub>-w) turbo spin echo, T<sub>2</sub>-w fluid-attenuated inversion recovery (FLAIR), DTI, and SIR-qMT sequences.</p><p><strong>Assessment: </strong>T<sub>2</sub>-lesions were identified as hyperintense on T<sub>2</sub>-w-FLAIR, and chronic black holes (cBHs) by simultaneous T<sub>2</sub>-w-FLAIR hyperintensity and T<sub>1</sub>-w hypointensity. Regions of interest (ROIs) in normal-appearing white matter (NAWM) were classified as proximal (p) or distant (d) to lesions, while normal white matter (NWM) was identified in HCs. PSR and RD values of T<sub>2</sub>-lesions and cBHs were compared to their matched p/dNAWM and NWM in HCs. Comparisons were also made between T<sub>2</sub>-lesions and cBHs.</p><p><strong>Statistical tests: </strong>Receiver operating characteristic curves evaluated metric accuracy, and paired t tests compared ES values of PSR and RD, with significance set at P < 0.050.</p><p><strong>Results: </strong>We identified 823 T<sub>2</sub>-lesions, 392 cBHs, 426 p-, and 213 d-NAWM ROIs in patients, and 162 NWM ROIs in HCs. PSR differed significantly in all comparisons, while RD was differed in all except cBHs vs. T<sub>2</sub>-lesions (P = 0.051). PSR had significantly higher accuracy in differentiating T<sub>2</sub>-lesions from p/dNAWM and NWM, with a larger ES when comparing T<sub>2</sub>-lesions to p/dNAWM and NWM and cBHs to pNAWM and NWM.</p><p><strong>Data conclusion: </strong>PSR offers superior accuracy and ES over RD in detecting tissue injury in MS.</p><p><strong>Level of evidence: </strong>1 TECHNICAL EFFICACY: Stage 2.</p>\",\"PeriodicalId\":16140,\"journal\":{\"name\":\"Journal of Magnetic Resonance Imaging\",\"volume\":\" \",\"pages\":\"\"},\"PeriodicalIF\":3.3000,\"publicationDate\":\"2024-12-10\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Magnetic Resonance Imaging\",\"FirstCategoryId\":\"3\",\"ListUrlMain\":\"https://doi.org/10.1002/jmri.29666\",\"RegionNum\":2,\"RegionCategory\":\"医学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Magnetic Resonance Imaging","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.1002/jmri.29666","RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING","Score":null,"Total":0}
Improving the Detection of Myelin Integrity in Multiple Sclerosis Using Selective Inversion Recovery for MRI With Quantitative Magnetization Transfer.
Background: Selective inversion recovery quantitative magnetization transfer (SIR-qMT)-derived macromolecular to free water pool size ratio (PSR) and diffusion tensor imaging (DTI)-derived radial diffusivity (RD) are potential metrics for assessing myelin integrity in multiple sclerosis (MS). However, establishing their accuracy in identifying tissue injury is essential for clinical translation.
Purpose: To compare the accuracy and Cohen's effect size (ES) of PSR and RD in detecting and quantifying tissue injury in early MS.
Study type: Cross-sectional prospective study.
Subjects: Fourty-three subjects with newly diagnosed MS (mean age 38 ± 11 years, 70% females) and 18 age- and sex-matched healthy controls (HCs; age 38 ± 12 years, 62.5% females).
Field strength/sequence: 3-T MRI using T1-weighted (T1-w) turbo spin echo, T2-w fluid-attenuated inversion recovery (FLAIR), DTI, and SIR-qMT sequences.
Assessment: T2-lesions were identified as hyperintense on T2-w-FLAIR, and chronic black holes (cBHs) by simultaneous T2-w-FLAIR hyperintensity and T1-w hypointensity. Regions of interest (ROIs) in normal-appearing white matter (NAWM) were classified as proximal (p) or distant (d) to lesions, while normal white matter (NWM) was identified in HCs. PSR and RD values of T2-lesions and cBHs were compared to their matched p/dNAWM and NWM in HCs. Comparisons were also made between T2-lesions and cBHs.
Statistical tests: Receiver operating characteristic curves evaluated metric accuracy, and paired t tests compared ES values of PSR and RD, with significance set at P < 0.050.
Results: We identified 823 T2-lesions, 392 cBHs, 426 p-, and 213 d-NAWM ROIs in patients, and 162 NWM ROIs in HCs. PSR differed significantly in all comparisons, while RD was differed in all except cBHs vs. T2-lesions (P = 0.051). PSR had significantly higher accuracy in differentiating T2-lesions from p/dNAWM and NWM, with a larger ES when comparing T2-lesions to p/dNAWM and NWM and cBHs to pNAWM and NWM.
Data conclusion: PSR offers superior accuracy and ES over RD in detecting tissue injury in MS.
期刊介绍：
The Journal of Magnetic Resonance Imaging (JMRI) is an international journal devoted to the timely publication of basic and clinical research, educational and review articles, and other information related to the diagnostic applications of magnetic resonance.
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