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Okubo T, Kawasaki K, Harada R, Nagatari T, Matsumoto M, Maru S. [Novel Application of Post-contrast T 1map for Detection of Subendocardial Infarction]. Nihon Hoshasen Gijutsu Gakkai Zasshi 2023; 79:1352-1358. [PMID: 37967944 DOI: 10.6009/jjrt.2023-1384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2023]
Abstract
In cardiac magnetic resonance (CMR) for myocardial infarction, there have been quite a few cases of obscure image contrast between subendocardial lesion and left ventricular (LV) blood pool on late gadolinium enhancement (LGE) images. This study was motivated by confirmation of usefulness of post-contrast T1map for detection of subendocardial infarction. From June 2017 to May 2018, forty-eight consecutive patients who underwent contrast-enhanced CMR to assess myocardial infarction were reviewed. We measured the contrast ratio (CR) between the infarcted myocardium and LV blood pool on LGE and on post-contrast T1map images, and compared them. The CR (mean±standard deviation) was -0.04±0.11 for LGE images and 0.02±0.04 for post-contrast T1map images (P<0.05). These results suggest that the post-contrast T1map, which uses the difference in T1 value as image contrast rather than magnitude image, can clearly depict the boundary between the infarcted myocardium and LV blood pool. The addition of post-contrast T1map to image interpretation might provide valuable information in the evaluation of subendocardial infarction.
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Affiliation(s)
- Takumi Okubo
- Department of Radiology, Chiba Cerebral and Cardiovascular Center
| | - Kohei Kawasaki
- Department of Radiology, Chiba Cerebral and Cardiovascular Center
| | - Rena Harada
- Department of Radiology, Chiba Cerebral and Cardiovascular Center
| | - Tsutomu Nagatari
- Department of Radiology, Chiba Cerebral and Cardiovascular Center
| | | | - Shigenori Maru
- Department of Radiology, Chiba Cerebral and Cardiovascular Center
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Image quality of late gadolinium enhancement in cardiac magnetic resonance with different doses of contrast material in patients with chronic myocardial infarction. Eur Radiol Exp 2020; 4:21. [PMID: 32242266 PMCID: PMC7118177 DOI: 10.1186/s41747-020-00149-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Accepted: 02/21/2020] [Indexed: 01/26/2023] Open
Abstract
Background Contrast-enhanced cardiac magnetic resonance (CMR) is pivotal for evaluating chronic myocardial infarction (CMI). Concerns about safety of gadolinium-based contrast agents favour dose reduction. We assessed image quality of scar tissue in CMRs performed with different doses of gadobutrol in CMI patients. Methods Informed consent was waived for this Ethics Committee-approved single-centre retrospective study. Consecutive contrast-enhanced CMRs from CMI patients were retrospectively analysed according to the administered gadobutrol dose (group A, 0.10 mmol/kg; group B, 0.15 mmol/kg; group C, 0.20 mmol/kg). We calculated the signal-to-noise ratio for scar tissue (SNRscar) and contrast-to-noise ratio between scar and either remote myocardium (CNRscar-rem) or blood (CNRscar-blood). Results Of 79 CMRs from 79 patients, 22 belonged to group A, 26 to group B, and 31 to group C. The groups were homogeneous for age, sex, left ventricular morpho-functional parameters, and percentage of scar tissue over whole myocardium (p ≥ 0.300). SNRscar was lower in group A (46.4; 40.3–65.1) than in group B (70.1; 52.2–111.5) (p = 0.013) and group C (72.1; 59.4–100.0) (p = 0.002), CNRscar-rem was lower in group A (62.9; 52.2–87.4) than in group B (96.5; 73.1–152.8) (p = 0.008) and in group C (103.9; 83.9–132.0) (p = 0.001). No other significant differences were found (p ≥ 0.335). Conclusions Gadobutrol at 0.10 mmol/kg provides inferior scar image quality of CMI than 0.15 and 0.20 mmol/kg; the last two dosages seem to provide similar LGE. Thus, for CMR of CMI, 0.15 mmol/kg of gadobutrol can be suggested instead of 0.20 mmol/kg, with no hindrance to scar visualisation. Dose reduction would not impact on diagnostic utility of CMR examinations.
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Diagnostic capability of feature-tracking cardiovascular magnetic resonance to detect infarcted segments: a comparison with tagged magnetic resonance and wall thickening analysis. Clin Radiol 2017; 72:828-834. [DOI: 10.1016/j.crad.2017.05.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Revised: 05/11/2017] [Accepted: 05/15/2017] [Indexed: 01/05/2023]
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Hammer-Hansen S, Leung SW, Hsu LY, Wilson JR, Taylor J, Greve AM, Thune JJ, Køber L, Kellman P, Arai AE. Early Gadolinium Enhancement for Determination of Area at Risk: A Preclinical Validation Study. JACC Cardiovasc Imaging 2017; 10:130-139. [PMID: 27665165 PMCID: PMC5384795 DOI: 10.1016/j.jcmg.2016.04.009] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Revised: 03/14/2016] [Accepted: 04/14/2016] [Indexed: 01/19/2023]
Abstract
OBJECTIVES The aim of this study was to determine whether early gadolinium enhancement (EGE) by cardiac magnetic resonance (CMR) in a canine model of reperfused myocardial infarction depicts the area at risk (AAR) as determined by microsphere blood flow analysis. BACKGROUND It remains controversial whether only the irreversibly injured myocardium enhances when CMR is performed in the setting of acute myocardial infarction. Recently, EGE has been proposed as a measure of the AAR in acute myocardial infarction because it correlates well with T2-weighted imaging of the AAR, but this still requires pathological validation. METHODS Eleven dogs underwent 2 h of coronary artery occlusion and 48 h of reperfusion before imaging at 1.5-T. EGE imaging was performed 3 min after contrast administration with coverage of the entire left ventricle. Late gadolinium enhancement imaging was performed between 10 and 15 min after contrast injection. AAR was defined as myocardium with blood flow <2 SD from remote myocardium determined by microspheres during occlusion. The size of infarction was determined with triphenyltetrazolium chloride. RESULTS There was no significant difference in the size of enhancement by EGE compared with the size of AAR by microspheres (44.1 ± 15.8% vs. 42.7 ± 9.2%; p = 0.61), with good correlation (r = 0.88; p < 0.001) and good agreement by Bland-Altman analysis (mean bias 1.4 ± 17.4%). There was no difference in the size of enhancement by EGE compared with enhancement on native T1 and T2 maps. The size of EGE was significantly greater than the infarct by triphenyltetrazolium chloride (44.1 ± 15.8% vs. 20.7 ± 14.4%; p < 0.001) and late gadolinium enhancement (44.1 ± 15.8% vs. 23.5 ± 12.7%; p < 0.001). CONCLUSIONS At 3 min post-contrast, EGE correlated well with the AAR by microspheres and CMR and was greater than infarct size. Thus, EGE enhances both reversibly and irreversibly injured myocardium.
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Affiliation(s)
- Sophia Hammer-Hansen
- Laboratory for Advanced Cardiovascular Imaging, National Heart, Lung, and Blood Institute, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland; Department of Medicine B, The Heart Center, Rigshospitalet, Copenhagen, Denmark
| | - Steve W Leung
- Laboratory for Advanced Cardiovascular Imaging, National Heart, Lung, and Blood Institute, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland; Department of Medicine and Radiology, Division of Cardiovascular Medicine, University of Kentucky, Lexington, Kentucky
| | - Li-Yueh Hsu
- Laboratory for Advanced Cardiovascular Imaging, National Heart, Lung, and Blood Institute, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland
| | - Joel R Wilson
- Laboratory for Advanced Cardiovascular Imaging, National Heart, Lung, and Blood Institute, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland; Department of Medicine and Radiology, Division of Cardiovascular Medicine, University of California-San Diego, San Diego, California
| | - Joni Taylor
- Laboratory for Advanced Cardiovascular Imaging, National Heart, Lung, and Blood Institute, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland
| | - Anders M Greve
- Laboratory for Advanced Cardiovascular Imaging, National Heart, Lung, and Blood Institute, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland
| | - Jens Jakob Thune
- Department of Medicine B, The Heart Center, Rigshospitalet, Copenhagen, Denmark
| | - Lars Køber
- Department of Medicine B, The Heart Center, Rigshospitalet, Copenhagen, Denmark
| | - Peter Kellman
- Laboratory for Advanced Cardiovascular Imaging, National Heart, Lung, and Blood Institute, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland
| | - Andrew E Arai
- Laboratory for Advanced Cardiovascular Imaging, National Heart, Lung, and Blood Institute, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland.
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Baxa J, Ferda J, Hromádka M. T1 mapping of the ischemic myocardium: Review of potential clinical use. Eur J Radiol 2016; 85:1922-1928. [PMID: 27105590 DOI: 10.1016/j.ejrad.2016.04.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2016] [Revised: 03/26/2016] [Accepted: 04/13/2016] [Indexed: 12/25/2022]
Abstract
Cardiac magnetic resonance imaging (CMR) is an indispensable part of the diagnostic algorithm in cardiology. CMR has become a gold standard in various disorders; moreover, it is well established also as a surrogate end-point in experimental and clinical studies. Particularly, the ability to directly display myocardial injury is a unique feature in comparison with other methods. The mapping of magnetic relaxation properties (T1, T2 and T2* relaxation times) are still relatively new techniques, but promising to improve the robustness of CMR and add new appropriate indications. The high potential of T1 mapping in the diagnostic of myocardial ischemic involvement has been highlighted in several experimental and clinical studies, but the use in clinical routine was limited due to the shortcomings in scanning and image evaluation. However, the quantitative technique of T1 mapping is now commercially available and its simple use, good reproducibility and limited subjectivity allow its incorporation into routine CMR protocols. This review article is aimed to summarise existing results and clinical experience with T1 mapping in patients with ischemic cardiac disease.
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Affiliation(s)
- Jan Baxa
- Department of Imaging Methods, Faculty of Medicine in Pilsen, Charles University in Prague and University Hospital Pilsen, Czech Republic.
| | - Jiří Ferda
- Department of Imaging Methods, Faculty of Medicine in Pilsen, Charles University in Prague and University Hospital Pilsen, Czech Republic
| | - Milan Hromádka
- Department of Cardiology, University Hospital Pilsen, Czech Republic
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Schaaf MJ, Mewton N, Rioufol G, Angoulvant D, Cayla G, Delarche N, Jouve B, Guerin P, Vanzetto G, Coste P, Morel O, Roubille F, Elbaz M, Roth O, Prunier F, Cung TT, Piot C, Sanchez I, Bonnefoy-Cudraz E, Revel D, Giraud C, Croisille P, Ovize M. Pre-PCI angiographic TIMI flow in the culprit coronary artery influences infarct size and microvascular obstruction in STEMI patients. J Cardiol 2015; 67:248-53. [PMID: 26116981 DOI: 10.1016/j.jjcc.2015.05.008] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2015] [Revised: 04/18/2015] [Accepted: 05/03/2015] [Indexed: 12/21/2022]
Abstract
OBJECTIVE The influence of initial-thrombolysis in myocardial infarction (i-TIMI) coronary flow in the culprit coronary artery on myocardial infarct and microvascular obstruction (MVO) size is unclear. We assessed the impact on infarct size of i-TIMI flow in the culprit coronary artery, as well as on MVO incidence and size, by contrast-enhanced cardiac magnetic resonance (ce-CMR). METHODS In a prospective, multicenter study, pre-percutaneous coronary intervention (PCI) coronary occlusion was defined by an i-TIMI flow ≤1, and patency was defined by an i-TIMI flow ≥2. Infarct size, as well as MVO presence and size, were measured on ce-CMR 72h after admission. RESULTS A total of 140 patients presenting with ST-elevated myocardial infarction referred for primary PCI were included. There was no significant difference in final post-PCI TIMI flow between the groups (2.95±0.02 vs. 2.97±0.02, respectively; p=0.44). In the i-TIMI flow ≤1 group, infarct size was significantly larger (32±17g vs. 21±17g, respectively; p=0.002), MVO was significantly more frequent (74% vs. 53%, respectively; p=0.012), and MVO size was significantly larger [1.3 IQR (0; 7.1) vs. 0 IQR (0; 1.6)], compared to in the i-TIMI ≥2 patient group. CONCLUSION Initial angiographic TIMI flow in the culprit coronary artery prior to any PCI predicted final infarct size and MVO size: the better was the i-TIMI flow, the smaller were the infarct and MVO size.
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Affiliation(s)
- Mathieu Julien Schaaf
- Cardiology Division, Centre d'Investigation Clinique de Lyon (CIC), Groupement Hospitalier Est, Hôpital Louis Pradel, 28 avenue Doyen Lépine, 69677 Bron, Hospices Civils de Lyon, France.
| | - Nathan Mewton
- Cardiology Division, Centre d'Investigation Clinique de Lyon (CIC), Groupement Hospitalier Est, Hôpital Louis Pradel, 28 avenue Doyen Lépine, 69677 Bron, Hospices Civils de Lyon, France; INSERM UMR-1060, CarMeN Laboratory, Université Claude Bernard Lyon1, Faculté de Médecine Lyon Est, F-69373 Lyon, France
| | - Gilles Rioufol
- Cardiology Division, Centre d'Investigation Clinique de Lyon (CIC), Groupement Hospitalier Est, Hôpital Louis Pradel, 28 avenue Doyen Lépine, 69677 Bron, Hospices Civils de Lyon, France
| | - Denis Angoulvant
- University Hospital of Tours, Hopital Trousseau, Cardiology Division, Université François Rabelais, Tours, France
| | - Guillaume Cayla
- University Hospital of Nîmes, Hôpital Universitaire Carémeau, Cardiology Division, Nîmes, France
| | | | - Bernard Jouve
- Regional Hospital of Aix-en-Provence, Cardiology Division, Aix en Provence, France
| | - Patrice Guerin
- Thorax Institute, Invasive Cardiology Department, University Hospital of Nantes, Nantes, France
| | - Gerald Vanzetto
- University Hospital of Grenoble, Hôpital La Tronche, Cardiology Division, Grenoble, France
| | - Pierre Coste
- University Hospital of Bordeaux, Groupe Hospitalier Sud Pessac, Bordeaux, France
| | - Olivier Morel
- University Hospital of Strasbourg, Nouvel Hôpital Civil, Cardiology Division, Strasbourg, France
| | - François Roubille
- University Hospital of Montpellier, Cardiology Division, UMR5203, UMR661, Universités Montpellier 1 and 2, Montpellier, France
| | - Meyer Elbaz
- University Hospital of Toulouse, Hôpital Rangeuil, Université Paul Sabatier, Toulouse, France
| | - Olivier Roth
- Regional Hospital of Mulhouse, Hôpital Emile Müller, Cardiology Division, Mulhouse, France
| | - Fabrice Prunier
- University Hospital of Angers, Cardiology Division, Angers, France
| | - Thien Tri Cung
- University Hospital of Montpellier, Cardiology Division, UMR5203, UMR661, Universités Montpellier 1 and 2, Montpellier, France
| | - Christophe Piot
- University Hospital of Montpellier, Cardiology Division, UMR5203, UMR661, Universités Montpellier 1 and 2, Montpellier, France
| | - Ingrid Sanchez
- Cardiology Division, Centre d'Investigation Clinique de Lyon (CIC), Groupement Hospitalier Est, Hôpital Louis Pradel, 28 avenue Doyen Lépine, 69677 Bron, Hospices Civils de Lyon, France
| | - Eric Bonnefoy-Cudraz
- Cardiology Division, Centre d'Investigation Clinique de Lyon (CIC), Groupement Hospitalier Est, Hôpital Louis Pradel, 28 avenue Doyen Lépine, 69677 Bron, Hospices Civils de Lyon, France
| | - Didier Revel
- Radiology Department, CREATIS-LRMN, CNRS UMR 5220 - INSERM U630 - Université Claude Bernard Lyon 1, Lyon, France
| | - Céline Giraud
- Cardiology Division, Centre d'Investigation Clinique de Lyon (CIC), Groupement Hospitalier Est, Hôpital Louis Pradel, 28 avenue Doyen Lépine, 69677 Bron, Hospices Civils de Lyon, France
| | - Pierre Croisille
- Radiology Department, CREATIS-LRMN, CNRS UMR 5220 - INSERM U630 - Université Claude Bernard Lyon 1, Lyon, France; University Hospital of Saint-Etienne, Radiology Department, Saint-Etienne, France
| | - Michel Ovize
- Cardiology Division, Centre d'Investigation Clinique de Lyon (CIC), Groupement Hospitalier Est, Hôpital Louis Pradel, 28 avenue Doyen Lépine, 69677 Bron, Hospices Civils de Lyon, France; INSERM UMR-1060, CarMeN Laboratory, Université Claude Bernard Lyon1, Faculté de Médecine Lyon Est, F-69373 Lyon, France
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Hammer-Hansen S, Bandettini WP, Hsu LY, Leung SW, Shanbhag S, Mancini C, Greve AM, Køber L, Thune JJ, Kellman P, Arai AE. Mechanisms for overestimating acute myocardial infarct size with gadolinium-enhanced cardiovascular magnetic resonance imaging in humans: a quantitative and kinetic study. Eur Heart J Cardiovasc Imaging 2015; 17:76-84. [PMID: 25983233 PMCID: PMC4684160 DOI: 10.1093/ehjci/jev123] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/26/2015] [Accepted: 04/16/2015] [Indexed: 12/15/2022] Open
Abstract
Aims It remains controversial whether cardiovascular magnetic resonance imaging with gadolinium only enhances acutely infarcted or also salvaged myocardium. We hypothesized that enhancement of salvaged myocardium may be due to altered extracellular volume (ECV) and contrast kinetics compared with normal and infarcted myocardium. If so, these mechanisms could contribute to overestimation of acute myocardial infarction (AMI) size. Methods and results Imaging was performed at 1.5T ≤ 7 days after AMI with serial T1 mapping and volumetric early (5 min post-contrast) and late (20 min post-contrast) gadolinium enhancement imaging. Infarcts were classified as transmural (>75% transmural extent) or non-transmural. Patients with non-transmural infarctions (n = 15) had shorter duration of symptoms before reperfusion (P = 0.02), lower peak troponin (P = 0.008), and less microvascular obstruction (P < 0.001) than patients with transmural infarcts (n = 22). The size of enhancement at 5 min was greater than at 20 min (18.7 ± 12.7 vs. 12.1 ± 7.0%, P = 0.003) in non-transmural infarctions, but similar in transmural infarctions (23.0 ± 10.0 vs. 21.9 ± 9.9%, P = 0.21). ECV of salvaged myocardium was greater than normal (39.5 ± 5.8 vs. 24.1 ± 3.1%) but less than infarcted myocardium (50.5 ± 6.0%, both P < 0.001). In kinetic studies of non-transmural infarctions, salvaged and infarcted myocardium had similar T1 at 4 min but different T1 at 8–20 min post-contrast. Conclusion The extent of gadolinium enhancement in AMI is modulated by ECV and contrast kinetics. Image acquisition too early after contrast administration resulted in overestimation of infarct size in non-transmural infarctions due to enhancement of salvaged myocardium.
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Affiliation(s)
- Sophia Hammer-Hansen
- Laboratory for Advanced Cardiovascular Imaging, National Heart, Lung, and Blood Institute, Department of Health and Human Services, National Institutes of Health, Building 10, Room B1D416, MSC 1061, 10 Center Drive, Bethesda, MD 20892-1061, USA Department of Medicine B, The Heart Center, Rigshospitalet, Copenhagen, Denmark
| | - W Patricia Bandettini
- Laboratory for Advanced Cardiovascular Imaging, National Heart, Lung, and Blood Institute, Department of Health and Human Services, National Institutes of Health, Building 10, Room B1D416, MSC 1061, 10 Center Drive, Bethesda, MD 20892-1061, USA
| | - Li-Yueh Hsu
- Laboratory for Advanced Cardiovascular Imaging, National Heart, Lung, and Blood Institute, Department of Health and Human Services, National Institutes of Health, Building 10, Room B1D416, MSC 1061, 10 Center Drive, Bethesda, MD 20892-1061, USA
| | - Steve W Leung
- Laboratory for Advanced Cardiovascular Imaging, National Heart, Lung, and Blood Institute, Department of Health and Human Services, National Institutes of Health, Building 10, Room B1D416, MSC 1061, 10 Center Drive, Bethesda, MD 20892-1061, USA Department of Medicine and Radiology, Division of Cardiovascular Medicine, University of Kentucky, Lexington, KY, USA
| | - Sujata Shanbhag
- Laboratory for Advanced Cardiovascular Imaging, National Heart, Lung, and Blood Institute, Department of Health and Human Services, National Institutes of Health, Building 10, Room B1D416, MSC 1061, 10 Center Drive, Bethesda, MD 20892-1061, USA
| | - Christine Mancini
- Laboratory for Advanced Cardiovascular Imaging, National Heart, Lung, and Blood Institute, Department of Health and Human Services, National Institutes of Health, Building 10, Room B1D416, MSC 1061, 10 Center Drive, Bethesda, MD 20892-1061, USA
| | - Anders M Greve
- Laboratory for Advanced Cardiovascular Imaging, National Heart, Lung, and Blood Institute, Department of Health and Human Services, National Institutes of Health, Building 10, Room B1D416, MSC 1061, 10 Center Drive, Bethesda, MD 20892-1061, USA
| | - Lars Køber
- Department of Medicine B, The Heart Center, Rigshospitalet, Copenhagen, Denmark
| | - Jens Jakob Thune
- Department of Medicine B, The Heart Center, Rigshospitalet, Copenhagen, Denmark
| | - Peter Kellman
- Laboratory for Advanced Cardiovascular Imaging, National Heart, Lung, and Blood Institute, Department of Health and Human Services, National Institutes of Health, Building 10, Room B1D416, MSC 1061, 10 Center Drive, Bethesda, MD 20892-1061, USA
| | - Andrew E Arai
- Laboratory for Advanced Cardiovascular Imaging, National Heart, Lung, and Blood Institute, Department of Health and Human Services, National Institutes of Health, Building 10, Room B1D416, MSC 1061, 10 Center Drive, Bethesda, MD 20892-1061, USA
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