Journal of Cardiovascular Magnetic Resonance最新文献

{"title":"Patterns of cortical oxygenation may predict the response to stenting in subjects with renal artery stenosis: A radiomics-based model.","authors":"Behzad Ebrahimi, Deep Gandhi, Mina H Alsaeedi, Lilach O Lerman","doi":"10.1016/j.jocmr.2024.100993","DOIUrl":"10.1016/j.jocmr.2024.100993","url":null,"abstract":"<p><strong>Background: </strong>Percutaneous-transluminal renal angioplasty (PTRA) and stenting aim to halt the progression of kidney disease in patients with renal artery stenosis (RAS), but its outcome is often suboptimal. We hypothesized that a model incorporating markers of renal function and oxygenation extracted using radiomics analysis of blood oxygenation-level dependent (BOLD)-MRI images may predict renal response to PTRA in swine RAS.</p><p><strong>Materials and methods: </strong>Twenty domestic pigs with RAS were scanned with CT and BOLD MRI before and 4 weeks after PTRA. Stenotic (STK) and contralateral (CLK) kidney volume, blood flow (RBF), and glomerular filtration rate (GFR) were determined, and BOLD-MRI R2 * maps were generated before and after administration of furosemide, a tubular reabsorption inhibitor. Radiomics features were extracted from pre-PTRA BOLD maps and Robust features were determined by Intraclass correlation coefficients (ICC). Prognostic models were developed to predict post-PTRA renal function based on the baseline functional and BOLD-radiomics features, using Lasso-regression for training, and testing with resampling.</p><p><strong>Results: </strong>Twenty-six radiomics features passed the robustness test. STK oxygenation distribution pattern did not respond to furosemide, whereas in the CLK radiomics features sensitive to oxygenation heterogeneity declined. Radiomics-based model predictions of post-PTRA GFR (r = 0.58, p = 0.007) and RBF (r = 0.68; p = 0.001) correlated with actual measurements with sensitivity and specificity of 92% and 67%, respectively. Models were unsuccessful in predicting post-PTRA systemic measures of renal function.</p><p><strong>Conclusions: </strong>Several radiomics features are sensitive to cortical oxygenation patterns and permit estimation of post-PTRA renal function, thereby distinguishing subjects likely to respond to PTRA and stenting.</p>","PeriodicalId":15221,"journal":{"name":"Journal of Cardiovascular Magnetic Resonance","volume":null,"pages":null},"PeriodicalIF":4.2,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11211233/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139466389","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"SCMR expert consensus statement for cardiovascular magnetic resonance of patients with a cardiac implantable electronic device.","authors":"Daniel Kim, Jeremy D Collins, James A White, Kate Hanneman, Daniel C Lee, Amit R Patel, Peng Hu, Harold Litt, Jonathan W Weinsaft, Rachel Davids, Kanae Mukai, Ming-Yen Ng, Julian A Luetkens, Ariel Roguin, Carlos E Rochitte, Pamela K Woodard, Charlotte Manisty, Karolina M Zareba, Lluis Mont, Frank Bogun, Daniel B Ennis, Saman Nazarian, Gregory Webster, Jadranka Stojanovska","doi":"10.1016/j.jocmr.2024.100995","DOIUrl":"10.1016/j.jocmr.2024.100995","url":null,"abstract":"<p><p>Cardiovascular magnetic resonance (CMR) is a proven imaging modality for informing diagnosis and prognosis, guiding therapeutic decisions, and risk stratifying surgical intervention. Patients with a cardiac implantable electronic device (CIED) would be expected to derive particular benefit from CMR given high prevalence of cardiomyopathy and arrhythmia. While several guidelines have been published over the last 16 years, it is important to recognize that both the CIED and CMR technologies, as well as our knowledge in MR safety, have evolved rapidly during that period. Given increasing utilization of CIED over the past decades, there is an unmet need to establish a consensus statement that integrates latest evidence concerning MR safety and CIED and CMR technologies. While experienced centers currently perform CMR in CIED patients, broad availability of CMR in this population is lacking, partially due to limited availability of resources for programming devices and appropriate monitoring, but also related to knowledge gaps regarding the risk-benefit ratio of CMR in this growing population. To address the knowledge gaps, this SCMR Expert Consensus Statement integrates consensus guidelines, primary data, and opinions from experts across disparate fields towards the shared goal of informing evidenced-based decision-making regarding the risk-benefit ratio of CMR for patients with CIEDs.</p>","PeriodicalId":15221,"journal":{"name":"Journal of Cardiovascular Magnetic Resonance","volume":null,"pages":null},"PeriodicalIF":4.2,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11211236/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139466425","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Lung water density is increased in patients at risk of heart failure and is largely independent of conventional CMR measures","authors":"N. R. Iyer, J. A. Bryant, Thu-Thao Le, J. G. Grenier, R. B. Thompson, C. W. Chin, M. Ugander","doi":"10.1101/2024.05.31.24308269","DOIUrl":"https://doi.org/10.1101/2024.05.31.24308269","url":null,"abstract":"Aims: Non-invasive methods to quantify pulmonary congestion are lacking in clinical practice. Cardiovascular magnetic resonance (CMR) lung water density (LWD) mapping is accurate, reproducible, and has prognostic value. However, it is not known whether LWD is associated with routinely acquired CMR parameters. Methods and Results: This was a prospective, observational cohort including healthy controls and patients at risk of heart failure. Lung water density was measured using CMR with a free-breathing short echo time 3D cartesian gradient-echo sequence with a respiratory navigator at 1.5T. Associations were assessed between LWD, lung water volume (LWV) and cardiac volumes, left ventricular (LV) mass and function, myocardial native T1 and extracellular volume fraction (ECV). In patients at risk for heart failure (n=155), LWD was greater than in healthy controls (n=15) (30.4{+/-}5.0 vs 27.2{+/-}4.3%, p=0.02). Using receiver operating characteristic analysis, the optimal cut-off for LWD was 27.6% to detect at-risk patients (sensitivity 72%, specificity 73%, positive likelihood ratio 2.7, inverse negative likelihood ratio 2.6). LWD was univariably associated with body mass index (BMI), hypertension, right atrial (RA) area and LV mass (p<0.05 for all). In multivariable linear regression, only BMI remained associated with LWD (R2=0.32, p<0.001). In a separate multivariable analysis including only CMR markers, only RA area remained associated with LWD (R2=0.05, p=0.006). Conclusion: LWD is increased in patients at risk for heart failure compared to controls, and is only weakly explained by conventional CMR measures. LWD provides diagnostic information which is largely independent of conventional CMR measures.","PeriodicalId":15221,"journal":{"name":"Journal of Cardiovascular Magnetic Resonance","volume":null,"pages":null},"PeriodicalIF":6.4,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141233054","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Growth of the right ventricular outflow tract in repaired tetralogy of Fallot: A longitudinal CMR study.","authors":"Kelsey Jurow, Kimberlee Gauvreau, Nicola Maschietto, Ashwin Prakash","doi":"10.1016/j.jocmr.2023.100002","DOIUrl":"10.1016/j.jocmr.2023.100002","url":null,"abstract":"<p><strong>Background: </strong>Many patients with repaired tetralogy of Fallot require pulmonary valve replacement (PVR) due to significant pulmonary regurgitation (PR). Transcatheter PVR (TPVR) is an equally effective and less invasive alternative to surgical PVR but many native right ventricular outflow tracts (RVOTs) are too large for TPVR at time of referral. Understanding the rate of growth of the RVOT may help optimize timing of referral. This study aims to examine the longitudinal growth of the native RVOT over time in repaired tetralogy of Fallot (TOF).</p><p><strong>Methods: </strong>A retrospective review of serial cardiac MRI cardiovascular magnetic resonance (CMR) data from 121 patients with repaired TOF and a native RVOT (median age at first CMR 14.7 years, average interval between the first and last CMR of 8.1 years) was performed to measure serial changes in RVOT diameter, cross-sectional area, perimeter-derived diameter, and length.</p><p><strong>Results: </strong>All parameters of RVOT size continued to grow with increasing age but growth was more rapid in the decade after TOF repair (for minimum systolic diameter, mean increase of 5.7 mm per 10 years up to year 12, subsequently 2.3 mm per 10 years). The RVOT was larger with a transannular patch and in patients without pulmonary stenosis (p < 0.001 for both), but this was not associated with rate of growth. More rapid RVOT enlargement was noted in patients with larger right ventricular end-diastolic volume (RVEDV), higher PR fraction, and greater rates of increases in RVEDV and PR (p < 0.001 for all) CONCLUSIONS: in patients with repaired TOF, using serial CMR data, we found that RVOT size increased progressively at all ages, but the rate was more rapid in the first decade after repair. More rapid RVOT enlargement was noted in patients with a larger RV, more PR, and greater rates of increases in RV size and PR severity. These results may be important in considering timing of referral for transcatheter pulmonary valves, in planning transcatheter and surgical valve replacement, and in designing future valves for the native RVOT.</p>","PeriodicalId":15221,"journal":{"name":"Journal of Cardiovascular Magnetic Resonance","volume":null,"pages":null},"PeriodicalIF":4.2,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11211093/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139424898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ethnic differences in cardiac structure and function assessed by MRI in healthy South Asian and White European people: A UK Biobank Study.","authors":"Kelly S Parke, Emer M Brady, Aseel Alfuhied, Rishabh S Motiwale, Cameron S Razieh, Anvesha Singh, Jayanth R Arnold, Matthew P M Graham-Brown, Joanna M Bilak, Sarah L Ayton, Abhishek Dattani, Jian L Yeo, Gerry P McCann, Gaurav S Gulsin","doi":"10.1016/j.jocmr.2023.100001","DOIUrl":"10.1016/j.jocmr.2023.100001","url":null,"abstract":"<p><strong>Background: </strong>Echocardiographic studies indicate South Asian people have smaller ventricular volumes, lower mass and more concentric remodelling than White European people, but there are no data using cardiac MRI (CMR). We aimed to compare CMR quantified cardiac structure and function in White European and South Asian people.</p><p><strong>Methods: </strong>Healthy White European and South Asian participants in the UK Biobank Imaging CMR sub-study were identified by excluding those with a history of cardiovascular disease, hypertension, obesity or diabetes. Ethnic groups were matched by age and sex. Cardiac volumes, mass and feature tracking strain were compared.</p><p><strong>Results: </strong>121 matched pairs (77 male/44 female, mean age 58 ± 8 years) of South Asian and White European participants were included. South Asian males and females had smaller absolute but not indexed left ventricular (LV) volumes, and smaller absolute and indexed right ventricular volumes, with lower absolute and indexed LV mass and lower LV mass:volume than White European participants. Although there were no differences in ventricular or atrial ejection fractions, LV global longitudinal strain was higher in South Asian females than White European females but not males, and global circumferential strain was higher in both male and South Asian females than White European females. Peak early diastolic strain rates were higher in South Asian versus White European males, but not different between South Asian and White European females.</p><p><strong>Conclusions: </strong>Contrary to echocardiographic studies, South Asian participants in the UK Biobank study had less concentric remodelling and higher global circumferential strain than White European subjects. These findings emphasise the importance of sex- and ethnic- specific normal ranges for cardiac volumes and function.</p>","PeriodicalId":15221,"journal":{"name":"Journal of Cardiovascular Magnetic Resonance","volume":null,"pages":null},"PeriodicalIF":4.2,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11211094/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139466388","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Society for Cardiovascular Magnetic Resonance 2022 Cases of SCMR case series.","authors":"Jason N Johnson, Hamidreza Pouraliakbar, Mohammad Mahdavi, Abdolmohammad Ranjbar, Kristopher Pfirman, Vishal Mehra, Shahzad Ahmed, Wejdan Ba-Atiyah, Mohammed Omar Galal, Riad Abou Zahr, Nasir Hussain, Raghu R Tadikamalla, Victor Farah, Sanja Dzelebdzic, Juan Carlos Muniz, Marc Lee, Jason Williams, Simon Lee, Sachin K Aggarwal, Daniel E Clark, Sean G Hughes, Madhusudan Ganigara, Mohamed Nagiub, Tarique Hussain, Cecilia Kwok, Han S Lim, Mark Nolan, Daniel S Kikuchi, Clive A Goulbourne, Anurag Sahu, Berge Sievers, Berk Sievers, Burkhard Sievers, Rimmy Garg, Carlos Requena Armas, Vijayasree Paleru, Ritu Agarwal, Rengarajan Rajagopal, Pranav Bhagirath, Rebecca Kozor, Ashish Aneja, Robert Tunks, Sylvia S M Chen","doi":"10.1016/j.jocmr.2023.100007","DOIUrl":"10.1016/j.jocmr.2023.100007","url":null,"abstract":"<p><p>\"Cases of SCMR\" is a case series on the SCMR website (https://www.scmr.org) for the purpose of education. The cases reflect the clinical presentation, and the use of cardiovascular magnetic resonance (CMR) in the diagnosis and management of cardiovascular disease. The 2022 digital collection of cases are presented in this manuscript.</p>","PeriodicalId":15221,"journal":{"name":"Journal of Cardiovascular Magnetic Resonance","volume":null,"pages":null},"PeriodicalIF":4.2,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11211240/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139424895","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Competency based curriculum for cardiovascular magnetic resonance: A position statement of the Society for Cardiovascular Magnetic Resonance.","authors":"Elsie T Nguyen, Karen Ordovas, Phil Herbst, Rebecca Kozor, Ming-Yen Ng, Luigi Natale, Robin Nijveldt, Rodrigo Salgado, Felipe Sanchez, Dipan Shah, Jadranka Stojanovska, Anne Marie Valente, Mark Westwood, Sven Plein","doi":"10.1016/j.jocmr.2023.100006","DOIUrl":"10.1016/j.jocmr.2023.100006","url":null,"abstract":"<p><p>This position statement guides cardiovascular magnetic resonance (CMR) imaging program directors and learners on the key competencies required for Level II and III CMR practitioners, whether trainees come from a radiology or cardiology background. This document is built upon existing curricula and was created and vetted by an international panel of cardiologists and radiologists on behalf of the Society for Cardiovascular Magnetic Resonance (SCMR).</p>","PeriodicalId":15221,"journal":{"name":"Journal of Cardiovascular Magnetic Resonance","volume":null,"pages":null},"PeriodicalIF":4.2,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11211229/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139432503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Layer-specific fast strain-encoded cardiac magnetic resonance imaging aids in the identification and discrimination of acute myocardial injury: a prospective proof-of-concept study.","authors":"Lukas D Weberling, David Albert, Andreas Ochs, Marco Ochs, Deborah Siry, Janek Salatzki, Evangelos Giannitsis, Norbert Frey, Johannes Riffel, Florian André","doi":"10.1016/j.jocmr.2024.101001","DOIUrl":"10.1016/j.jocmr.2024.101001","url":null,"abstract":"<p><strong>Background: </strong>Acute myocardial injury is a common diagnosis in the emergency department and differential diagnoses are numerous. Cardiac magnetic resonance (CMR) strain sequences, such as fast strain ENCoded (fSENC), are early predictors of myocardial function loss. This study assessed the potential diagnostic and prognostic benefits of a layer-specific approach.</p><p><strong>Methods: </strong>For this prospective study, patients in the emergency department fulfilling rule-in criteria for non-ST-elevation myocardial infarction (NSTEMI) received an ultra-fast fSENC CMR. Volunteers without cardiac diseases (controls) were recruited for comparison. Measurements were performed in a single heartbeat acquisition to measure global longitudinal strain (GLS) and segmental longitudinal strain and dysfunctional segments. The GLS was measured in two layers and a difference (GLS_difference = GLS_epicardial - GLS_endocardial) was calculated. The performance of those strain features was compared to standard care (physical examination, cardiac biomarkers, electrocardiogram). According to the final diagnosis after discharge, patients were divided into groups and followed up for 2 years.</p><p><strong>Results: </strong>A total of 114 participants, including 50 controls, were included. The 64 patients (51 male) were divided into a NSTEMI (25), myocarditis (16), and other myocardial injury group (23). GLS served as a potent predictor of myocardial injury (area under the curve (AUC) 91.8%). The GLS_difference provided an excellent diagnostic performance to identify a NSTEMI (AUC 83.2%), further improved by including dysfunctional segments (AUC 87.5%, p = 0.01). An optimal test was achieved by adding fSENC to standard care (AUC 95.5%, sensitivity 96.0%, specificity 86.5%, p = 0.03). No death occurred in 2 years for patients with normal GLS and ≤5 dysfunctional segments, while three patients died that showed abnormal GLS or >5 dysfunctional segments.</p><p><strong>Conclusions: </strong>Layer-specific strain is a potential new marker with high diagnostic performance in the identification and differentiation of acute myocardial injuries.</p>","PeriodicalId":15221,"journal":{"name":"Journal of Cardiovascular Magnetic Resonance","volume":null,"pages":null},"PeriodicalIF":4.2,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11211227/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139512666","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Combined free-running four-dimensional anatomical and flow magnetic resonance imaging with native contrast using Synchronization of Neighboring Acquisitions by Physiological Signals.","authors":"Mariana B L Falcão, Adèle L C Mackowiak, Giulia M C Rossi, Milan Prša, Estelle Tenisch, Simone Rumac, Mario Bacher, Tobias Rutz, Ruud B van Heeswijk, Peter Speier, Michael Markl, Jessica A M Bastiaansen, Matthias Stuber, Christopher W Roy","doi":"10.1016/j.jocmr.2024.101006","DOIUrl":"10.1016/j.jocmr.2024.101006","url":null,"abstract":"<p><strong>Background: </strong>Four-dimensional (4D) flow magnetic resonance imaging (MRI) often relies on the injection of gadolinium- or iron-oxide-based contrast agents to improve vessel delineation. In this work, a novel technique is developed to acquire and reconstruct 4D flow data with excellent dynamic visualization of blood vessels but without the need for contrast injection. Synchronization of Neighboring Acquisitions by Physiological Signals (SyNAPS) uses pilot tone (PT) navigation to retrospectively synchronize the reconstruction of two free-running three-dimensional radial acquisitions, to create co-registered anatomy and flow images.</p><p><strong>Methods: </strong>Thirteen volunteers and two Marfan syndrome patients were scanned without contrast agent using one free-running fast interrupted steady-state (FISS) sequence and one free-running phase-contrast MRI (PC-MRI) sequence. PT signals spanning the two sequences were recorded for retrospective respiratory motion correction and cardiac binning. The magnitude and phase images reconstructed, respectively, from FISS and PC-MRI, were synchronized to create SyNAPS 4D flow datasets. Conventional two-dimensional (2D) flow data were acquired for reference in ascending (AAo) and descending aorta (DAo). The blood-to-myocardium contrast ratio, dynamic vessel area, net volume, and peak flow were used to compare SyNAPS 4D flow with Native 4D flow (without FISS information) and 2D flow. A score of 0-4 was given to each dataset by two blinded experts regarding the feasibility of performing vessel delineation.</p><p><strong>Results: </strong>Blood-to-myocardium contrast ratio for SyNAPS 4D flow magnitude images (1.5 ± 0.3) was significantly higher than for Native 4D flow (0.7 ± 0.1, p < 0.01) and was comparable to 2D flow (2.3 ± 0.9, p = 0.02). Image quality scores of SyNAPS 4D flow from the experts (M.P.: 1.9 ± 0.3, E.T.: 2.5 ± 0.5) were overall significantly higher than the scores from Native 4D flow (M.P.: 1.6 ± 0.6, p = 0.03, E.T.: 0.8 ± 0.4, p < 0.01) but still significantly lower than the scores from the reference 2D flow datasets (M.P.: 2.8 ± 0.4, p < 0.01, E.T.: 3.5 ± 0.7, p < 0.01). The Pearson correlation coefficient between the dynamic vessel area measured on SyNAPS 4D flow and that from 2D flow was 0.69 ± 0.24 for the AAo and 0.83 ± 0.10 for the DAo, whereas the Pearson correlation between Native 4D flow and 2D flow measurements was 0.12 ± 0.48 for the AAo and 0.08 ± 0.39 for the DAo. Linear correlations between SyNAPS 4D flow and 2D flow measurements of net volume (r² = 0.83) and peak flow (r² = 0.87) were larger than the correlations between Native 4D flow and 2D flow measurements of net volume (r² = 0.79) and peak flow (r² = 0.76).</p><p><strong>Conclusion: </strong>The feasibility and utility of SyNAPS were demonstrated for joint whole-heart anatomical and flow MRI without requiring electrocardiography gating, respiratory navigators, or ","PeriodicalId":15221,"journal":{"name":"Journal of Cardiovascular Magnetic Resonance","volume":null,"pages":null},"PeriodicalIF":4.2,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11211232/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139681138","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Characterization of quantitative susceptibility mapping in the left ventricular myocardium.","authors":"Andrew Tyler, Li Huang, Karl Kunze, Radhouene Neji, Ronald Mooiweer, Charlotte Rogers, Pier Giorgio Masci, Sébastien Roujol","doi":"10.1016/j.jocmr.2024.101000","DOIUrl":"10.1016/j.jocmr.2024.101000","url":null,"abstract":"<p><strong>Background: </strong>Myocardial quantitative susceptibility mapping (QSM) may offer better specificity to iron than conventional T₂* imaging in the assessment of cardiac diseases, including intra-myocardial hemorrhage. However, the precision and repeatability of cardiac QSM have not yet been characterized. The aim of this study is to characterize these key metrics in a healthy volunteer cohort and show the feasibility of the method in patients.</p><p><strong>Methods: </strong>Free breathing respiratory-navigated multi-echo 3D gradient echo images were acquired, from which QSM maps were reconstructed using the Morphology Enhanced Dipole Inversion toolbox. This technique was first evaluated in a susceptibility phantom containing tubes with known concentrations of gadolinium. In vivo characterization of myocardial QSM was then performed in a cohort of 10 healthy volunteers where each subject was scanned twice. Mean segment susceptibility, precision (standard deviation of voxel magnetic susceptibilities within one segment), and repeatability (absolute difference in segment mean susceptibility between repeats) of QSM were calculated for each American Heart Association (AHA) myocardial segment. Finally, the feasibility of the method was shown in 10 patients, including four with hemorrhagic infarcts.</p><p><strong>Results: </strong>The phantom experiment showed a strong linear relationship between measured and predicted susceptibility shifts (R² > 0.99). For the healthy volunteer cohort, AHA segment analysis showed the mean segment susceptibility was 0.00 ± 0.02 ppm, the mean precision was 0.05 ± 0.04 ppm, and the mean repeatability was 0.02 ± 0.02 ppm. Cardiac QSM was successfully performed in all patients. Focal iron deposits were successfully visualized in the patients with hemorrhagic myocardial infarctions.</p><p><strong>Conclusion: </strong>The precision and repeatability of cardiac QSM were successfully characterized in phantom and in vivo experiments. The feasibility of the technique was also successfully demonstrated in patients. While challenges still remain, further clinical evaluation of the technique is now warranted.</p><p><strong>Trial registration: </strong>This work does not report on a health care intervention.</p>","PeriodicalId":15221,"journal":{"name":"Journal of Cardiovascular Magnetic Resonance","volume":null,"pages":null},"PeriodicalIF":6.4,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11129096/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139491346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}