{"title":"Safety Net Reconstruction to Catch Low-Density and Low-Volume Calcifications at Photon-Counting Detector CT Using Virtual Noncontrast Imaging.","authors":"Prabhakar Shantha Rajiah, Kishore Rajendran","doi":"10.1148/ryct.240266","DOIUrl":"10.1148/ryct.240266","url":null,"abstract":"","PeriodicalId":21168,"journal":{"name":"Radiology. Cardiothoracic imaging","volume":"6 4","pages":"e240266"},"PeriodicalIF":3.8,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11369647/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142018490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Mark J Greenhill, Pooja Rangan, Wilber Su, J Peter Weiss, Michael Zawaneh, Samuel Unzek, Balaji Tamarappoo, Julia Indik, Roderick Tung, Michael F Morris
{"title":"Erratum for: MRI in Patients with Cardiovascular Implantable Electronic Devices and Fractured or Abandoned Leads.","authors":"Mark J Greenhill, Pooja Rangan, Wilber Su, J Peter Weiss, Michael Zawaneh, Samuel Unzek, Balaji Tamarappoo, Julia Indik, Roderick Tung, Michael F Morris","doi":"10.1148/ryct.249004","DOIUrl":"10.1148/ryct.249004","url":null,"abstract":"","PeriodicalId":21168,"journal":{"name":"Radiology. Cardiothoracic imaging","volume":"6 4","pages":"e249004"},"PeriodicalIF":3.8,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11375431/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141580736","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Arvin Arani, Matthew C Murphy, Huzefa Bhopalwala, Shivaram P Arunachalam, Phillip J Rossman, Joshua D Trzasko, Kevin Glaser, Yi Sui, Tina Gunderson, Adelaide M Arruda-Olson, Armando Manduca, Kejal Kantarci, Richard L Ehman, Philip A Araoz
Purpose To investigate the feasibility of using quantitative MR elastography (MRE) to characterize the influence of aging and sex on left ventricular (LV) shear stiffness. Materials and Methods In this prospective study, LV myocardial shear stiffness was measured in 109 healthy volunteers (age range: 18-84 years; mean age, 40 years ± 18 [SD]; 57 women, 52 men) enrolled between November 2018 and September 2019, using a 5-minute MRE acquisition added to a clinical MRI protocol. Linear regression models were used to estimate the association of cardiac MRI and MRE characteristics with age and sex; models were also fit to assess potential age-sex interaction. Results Myocardial shear stiffness significantly increased with age in female (age slope = 0.03 kPa/year ± 0.01, P = .009) but not male (age slope = 0.008 kPa/year ± 0.009, P = .38) volunteers. LV ejection fraction (LVEF) increased significantly with age in female volunteers (0.23% ± 0.08 per year, P = .005). LV end-systolic volume (LVESV) decreased with age in female volunteers (-0.20 mL/m2 ± 0.07, P = .003). MRI parameters, including T1, strain, and LV mass, did not demonstrate this interaction (P > .05). Myocardial shear stiffness was not significantly correlated with LVEF, LV stroke volume, body mass index, or any MRI strain metrics (P > .05) but showed significant correlations with LV end-diastolic volume/body surface area (BSA) (slope = -3 kPa/mL/m2 ± 1, P = .004, r2 = 0.08) and LVESV/BSA (-1.6 kPa/mL/m2 ± 0.5, P = .003, r2 = 0.08). Conclusion This study demonstrates that female, but not male, individuals experience disproportionate LV stiffening with natural aging, and these changes can be noninvasively measured with MRE. Keywords: Cardiac, Elastography, Biological Effects, Experimental Investigations, Sexual Dimorphisms, MR Elastography, Myocardial Shear Stiffness, Quantitative Stiffness Imaging, Aging Heart, Myocardial Biomechanics, Cardiac MRE Supplemental material is available for this article. Published under a CC BY 4.0 license.
{"title":"Sex Differences in Aging-related Myocardial Stiffening Quantitatively Measured with MR Elastography.","authors":"Arvin Arani, Matthew C Murphy, Huzefa Bhopalwala, Shivaram P Arunachalam, Phillip J Rossman, Joshua D Trzasko, Kevin Glaser, Yi Sui, Tina Gunderson, Adelaide M Arruda-Olson, Armando Manduca, Kejal Kantarci, Richard L Ehman, Philip A Araoz","doi":"10.1148/ryct.230140","DOIUrl":"10.1148/ryct.230140","url":null,"abstract":"<p><p>Purpose To investigate the feasibility of using quantitative MR elastography (MRE) to characterize the influence of aging and sex on left ventricular (LV) shear stiffness. Materials and Methods In this prospective study, LV myocardial shear stiffness was measured in 109 healthy volunteers (age range: 18-84 years; mean age, 40 years ± 18 [SD]; 57 women, 52 men) enrolled between November 2018 and September 2019, using a 5-minute MRE acquisition added to a clinical MRI protocol. Linear regression models were used to estimate the association of cardiac MRI and MRE characteristics with age and sex; models were also fit to assess potential age-sex interaction. Results Myocardial shear stiffness significantly increased with age in female (age slope = 0.03 kPa/year ± 0.01, <i>P</i> = .009) but not male (age slope = 0.008 kPa/year ± 0.009, <i>P</i> = .38) volunteers. LV ejection fraction (LVEF) increased significantly with age in female volunteers (0.23% ± 0.08 per year, <i>P</i> = .005). LV end-systolic volume (LVESV) decreased with age in female volunteers (-0.20 mL/m<sup>2</sup> ± 0.07, <i>P</i> = .003). MRI parameters, including T1, strain, and LV mass, did not demonstrate this interaction (<i>P</i> > .05). Myocardial shear stiffness was not significantly correlated with LVEF, LV stroke volume, body mass index, or any MRI strain metrics (<i>P</i> > .05) but showed significant correlations with LV end-diastolic volume/body surface area (BSA) (slope = -3 kPa/mL/m<sup>2</sup> ± 1, <i>P</i> = .004, <i>r</i><sup>2</sup> = 0.08) and LVESV/BSA (-1.6 kPa/mL/m<sup>2</sup> ± 0.5, <i>P</i> = .003, <i>r</i><sup>2</sup> = 0.08). Conclusion This study demonstrates that female, but not male, individuals experience disproportionate LV stiffening with natural aging, and these changes can be noninvasively measured with MRE. <b>Keywords:</b> Cardiac, Elastography, Biological Effects, Experimental Investigations, Sexual Dimorphisms, MR Elastography, Myocardial Shear Stiffness, Quantitative Stiffness Imaging, Aging Heart, Myocardial Biomechanics, Cardiac MRE <i>Supplemental material is available for this article</i>. Published under a CC BY 4.0 license.</p>","PeriodicalId":21168,"journal":{"name":"Radiology. Cardiothoracic imaging","volume":"6 3","pages":"e230140"},"PeriodicalIF":3.8,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11211939/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141080841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Seeing between Time: Higher Frame Rate Cardiac Cine MRI using Deep Learning.","authors":"Ioannis Koktzoglou","doi":"10.1148/ryct.240140","DOIUrl":"10.1148/ryct.240140","url":null,"abstract":"","PeriodicalId":21168,"journal":{"name":"Radiology. Cardiothoracic imaging","volume":"6 3","pages":"e240140"},"PeriodicalIF":3.8,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11211936/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141262643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Salma Zook, Bhupendar Tayal, Kristian Kragholm, Ola Abdelkarim, Diana Tran, Myra Cocker, Juan Carlos Ramirez-Giraldo, Kristina Hallam, Colleen Sexton, Stephanie Johnson, Su Min Chang