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Schuster A, Stahnke VC, Unterberg-Buchwald C, Kowallick JT, Lamata P, Steinmetz M, Kutty S, Fasshauer M, Staab W, Sohns JM, Bigalke B, Ritter C, Hasenfuß G, Beerbaum P, Lotz J. Cardiovascular magnetic resonance feature-tracking assessment of myocardial mechanics: Intervendor agreement and considerations regarding reproducibility. Clin Radiol 2015; 70:989-98. [PMID: 26139384 PMCID: PMC4683162 DOI: 10.1016/j.crad.2015.05.006] [Citation(s) in RCA: 141] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Revised: 04/30/2015] [Accepted: 05/18/2015] [Indexed: 12/31/2022]
Abstract
Aim To assess intervendor agreement of cardiovascular magnetic resonance feature tracking (CMR-FT) and to study the impact of repeated measures on reproducibility. Materials and methods Ten healthy volunteers underwent cine imaging in short-axis orientation at rest and with dobutamine stimulation (10 and 20 μg/kg/min). All images were analysed three times using two types of software (TomTec, Unterschleissheim, Germany and Circle, cvi42, Calgary, Canada) to assess global left ventricular circumferential (Ecc) and radial (Err) strains and torsion. Differences in intra- and interobserver variability within and between software types were assessed based on single and averaged measurements (two and three repetitions with subsequent averaging of results, respectively) as determined by Bland–Altman analysis, intraclass correlation coefficients (ICC), and coefficient of variation (CoV). Results Myocardial strains and torsion significantly increased on dobutamine stimulation with both types of software (p<0.05). Resting Ecc and torsion as well as Ecc values during dobutamine stimulation were lower measured with Circle (p<0.05). Intra- and interobserver variability between software types was lowest for Ecc (ICC 0.81 [0.63–0.91], 0.87 [0.72–0.94] and CoV 12.47% and 14.3%, respectively) irrespective of the number of analysis repetitions. Err and torsion showed higher variability that markedly improved for torsion with repeated analyses and to a lesser extent for Err. On an intravendor level TomTec showed better reproducibility for Ecc and torsion and Circle for Err. Conclusions CMR-FT strain and torsion measurements are subject to considerable intervendor variability, which can be reduced using three analysis repetitions. For both vendors, Ecc qualifies as the most robust parameter with the best agreement, albeit lower Ecc values obtained using Circle, and warrants further investigation of incremental clinical merit. This is the first comparison of two types of CMR-FT software resulting in clinically valuable inter-vendor agreement data. Assessment of myocardial strain and torsion is feasible with both types of software at rest and with dobutamine stimulation. For both vendors, Ecc qualifies as the most robust parameter with the lowest variability.
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Affiliation(s)
- A Schuster
- Department of Cardiology and Pneumology, Georg-August University, Göttingen, Germany; DZHK (German Centre for Cardiovascular Research), Germany; Division of Imaging Sciences and Biomedical Engineering, The Rayne Institute, St. Thomas' Hospital, King's College London, London, UK.
| | - V-C Stahnke
- Institute for Diagnostic and Interventional Radiology, Georg-August University, Göttingen, Germany
| | - C Unterberg-Buchwald
- Department of Cardiology and Pneumology, Georg-August University, Göttingen, Germany; DZHK (German Centre for Cardiovascular Research), Germany; Institute for Diagnostic and Interventional Radiology, Georg-August University, Göttingen, Germany
| | - J T Kowallick
- DZHK (German Centre for Cardiovascular Research), Germany; Institute for Diagnostic and Interventional Radiology, Georg-August University, Göttingen, Germany
| | - P Lamata
- Division of Imaging Sciences and Biomedical Engineering, The Rayne Institute, St. Thomas' Hospital, King's College London, London, UK; Department of Computer Science, University of Oxford, Oxford, UK
| | - M Steinmetz
- Department of Paediatric Cardiology and Intensive Care Medicine, Georg-August-University Göttingen, Göttingen, Germany
| | - S Kutty
- Children's Hospital and Medical Center Joint Division of Pediatric Cardiology, University of Nebraska / Creighton University, Omaha, NE, USA
| | - M Fasshauer
- DZHK (German Centre for Cardiovascular Research), Germany; Institute for Diagnostic and Interventional Radiology, Georg-August University, Göttingen, Germany
| | - W Staab
- DZHK (German Centre for Cardiovascular Research), Germany; Institute for Diagnostic and Interventional Radiology, Georg-August University, Göttingen, Germany
| | - J M Sohns
- DZHK (German Centre for Cardiovascular Research), Germany; Institute for Diagnostic and Interventional Radiology, Georg-August University, Göttingen, Germany
| | - B Bigalke
- Department of Cardiology, Campus Benjamin Franklin, Charité Berlin, Hindenburgdamm 30, 12200 Berlin, Germany
| | - C Ritter
- DZHK (German Centre for Cardiovascular Research), Germany; Institute for Diagnostic and Interventional Radiology, Georg-August University, Göttingen, Germany
| | - G Hasenfuß
- Department of Cardiology and Pneumology, Georg-August University, Göttingen, Germany; DZHK (German Centre for Cardiovascular Research), Germany
| | - P Beerbaum
- Department of Paediatric Cardiology, Hannover Medical School, Hannover, Germany
| | - J Lotz
- DZHK (German Centre for Cardiovascular Research), Germany; Institute for Diagnostic and Interventional Radiology, Georg-August University, Göttingen, Germany
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Kowallick JT, Joseph AA, Unterberg-Buchwald C, Fasshauer M, van Wijk K, Merboldt KD, Voit D, Frahm J, Lotz J, Sohns JM. Real-time phase-contrast flow MRI of the ascending aorta and superior vena cava as a function of intrathoracic pressure (Valsalva manoeuvre). Br J Radiol 2014; 87:20140401. [PMID: 25074791 DOI: 10.1259/bjr.20140401] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVE Real-time phase-contrast flow MRI at high spatiotemporal resolution was applied to simultaneously evaluate haemodynamic functions in the ascending aorta (AA) and superior vena cava (SVC) during elevated intrathoracic pressure (Valsalva manoeuvre). METHODS Real-time phase-contrast flow MRI at 3 T was based on highly undersampled radial gradient-echo acquisitions and phase-sensitive image reconstructions by regularized non-linear inversion. Dynamic alterations of flow parameters were obtained for 19 subjects at 40-ms temporal resolution, 1.33-mm in-plane resolution and 6-mm section thickness. Real-time measurements were performed during normal breathing (10 s), increased intrathoracic pressure (10 s) and recovery (20 s). RESULTS Real-time measurements were technically successful in all volunteers. During the Valsalva manoeuvre (late strain) and relative to values during normal breathing, the mean peak flow velocity and flow volume decreased significantly in both vessels (p < 0.001) followed by a return to normal parameters within the first 10 s of recovery in the AA. By contrast, flow in the SVC presented with a brief (1-2 heartbeats) but strong overshoot of both the peak velocity and blood volume immediately after pressure release followed by rapid normalization. CONCLUSION Real-time phase-contrast flow MRI may assess cardiac haemodynamics non-invasively, in multiple vessels, across the entire luminal area and at high temporal and spatial resolution. ADVANCES IN KNOWLEDGE Future clinical applications of this technique promise new insights into haemodynamic alterations associated with pre-clinical congestive heart failure or diastolic dysfunction, especially in cases where echocardiography is technically compromised.
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Affiliation(s)
- J T Kowallick
- 1 Institute for Diagnostic and Interventional Radiology, Heart Center, University Medical Center Göttingen, Göttingen, Germany
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Fasshauer M, Joseph AA, Kowallick JT, Unterberg-Buchwald C, Merboldt KD, Voit D, Steinmetz M, Staab W, Schaetz S, Zhang S, Frahm J, Lotz J, Sohns JM. Real-time phase-contrast flow MRI of haemodynamic changes in the ascending aorta and superior vena cava during Mueller manoeuvre. Clin Radiol 2014; 69:1066-71. [PMID: 25060931 DOI: 10.1016/j.crad.2014.06.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Revised: 06/01/2014] [Accepted: 06/03/2014] [Indexed: 10/25/2022]
Abstract
AIM To evaluate the potential of real-time phase-contrast flow magnetic resonance imaging (MRI) at 40 ms resolution for the simultaneous determination of blood flow in the ascending aorta (AA) and superior vena cava (SVC) in response to reduced intrathoracic pressure (Mueller manoeuvre). MATERIALS AND METHODS Through-plane flow was assessed in 20 healthy young subjects using real-time phase-contrast MRI based on highly undersampled radial fast low-angle shot (FLASH) with image reconstruction by regularized non-linear inversion. Haemodynamic alterations (three repetitions per subject = 60 events) were evaluated during normal breathing (10 s), inhalation with nearly closed epiglottis (10 s), and recovery (20 s). RESULTS Relative to normal breathing and despite interindividual differences, reduced intrathoracic pressure by at least 30 mmHg significantly decreased the initial peak mean velocity (averaged across the lumen) in the AA by -24 ± 9% and increased the velocity in the SVC by +28 ± 25% (p < 0.0001, n = 23 successful events). Respective changes in flow volume per heartbeat were -25 ± 9% in the AA and +49 ± 44% in the SVC (p < 0.0001, n = 23). Flow parameters returned to baseline during sustained pressure reduction, while the heart rate was elevated by 10% (p < 0.0001) after the start (n = 24) and end (n = 17) of the manoeuvre. CONCLUSIONS Real-time flow MRI during low intrathoracic pressure non-invasively revealed quantitative haemodynamic adjustments in both the AA and SVC.
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Affiliation(s)
- M Fasshauer
- Institute for Diagnostic and Interventional Radiology, Heart Centre, University Medical Centre, Georg-August-University Göttingen, Germany; DZHK, German Centre for Cardiovascular Research, Göttingen, Germany
| | - A A Joseph
- Biomedizinische NMR Forschungs GmbH am Max-Planck-Institut für biophysikalische Chemie, Göttingen, Germany; DZHK, German Centre for Cardiovascular Research, Göttingen, Germany
| | - J T Kowallick
- Institute for Diagnostic and Interventional Radiology, Heart Centre, University Medical Centre, Georg-August-University Göttingen, Germany; DZHK, German Centre for Cardiovascular Research, Göttingen, Germany
| | - C Unterberg-Buchwald
- Institute for Diagnostic and Interventional Radiology, Heart Centre, University Medical Centre, Georg-August-University Göttingen, Germany; Clinic for Cardiology and Pneumology, Heart Centre, University Medical Centre, Georg-August-University Göttingen, Germany; DZHK, German Centre for Cardiovascular Research, Göttingen, Germany
| | - K D Merboldt
- Biomedizinische NMR Forschungs GmbH am Max-Planck-Institut für biophysikalische Chemie, Göttingen, Germany; DZHK, German Centre for Cardiovascular Research, Göttingen, Germany
| | - D Voit
- Biomedizinische NMR Forschungs GmbH am Max-Planck-Institut für biophysikalische Chemie, Göttingen, Germany; DZHK, German Centre for Cardiovascular Research, Göttingen, Germany
| | - M Steinmetz
- DZHK, German Centre for Cardiovascular Research, Göttingen, Germany; Clinic for Paediatric Cardiology and Intensive Care Medicine, Heart Centre, University Medical Centre, Georg-August-University Göttingen, Germany
| | - W Staab
- Institute for Diagnostic and Interventional Radiology, Heart Centre, University Medical Centre, Georg-August-University Göttingen, Germany; DZHK, German Centre for Cardiovascular Research, Göttingen, Germany
| | - S Schaetz
- Biomedizinische NMR Forschungs GmbH am Max-Planck-Institut für biophysikalische Chemie, Göttingen, Germany; DZHK, German Centre for Cardiovascular Research, Göttingen, Germany
| | - S Zhang
- Biomedizinische NMR Forschungs GmbH am Max-Planck-Institut für biophysikalische Chemie, Göttingen, Germany; DZHK, German Centre for Cardiovascular Research, Göttingen, Germany
| | - J Frahm
- Biomedizinische NMR Forschungs GmbH am Max-Planck-Institut für biophysikalische Chemie, Göttingen, Germany; DZHK, German Centre for Cardiovascular Research, Göttingen, Germany
| | - J Lotz
- Institute for Diagnostic and Interventional Radiology, Heart Centre, University Medical Centre, Georg-August-University Göttingen, Germany; DZHK, German Centre for Cardiovascular Research, Göttingen, Germany.
| | - J M Sohns
- Institute for Diagnostic and Interventional Radiology, Heart Centre, University Medical Centre, Georg-August-University Göttingen, Germany; DZHK, German Centre for Cardiovascular Research, Göttingen, Germany
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Menke J, Sohns JM, Staab W, Seif AHA, Schwarz A. Prospektives Triggern versus retrospektives Gating in der koronaren CT-Angiografie: Meta-Analyse von diagnostischer Genauigkeit, Bildqualität und Strahlendosis. ROFO-FORTSCHR RONTG 2014. [DOI: 10.1055/s-0034-1373580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Sohns JM, Staab W, Menke J, Bergau L, Dabir D, Schwarz A, Spiro J, Dorencamp M, Harrison JL, Steinmetz M, Sohns C, Lotz J. Vascular and extra-vascular pathologies in magnetic resonance angiography of the thoracic aorta and the origin of the great vessels. ROFO-FORTSCHR RONTG 2014. [DOI: 10.1055/s-0034-1373574] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Sohns JM, Faßhauer M, Kowallick JT, Joseph A, Unterberg-Buchwald C, Merboldt KD, Voit D, Staab W, Steinmetz M, Schuster A, Zhang S, Frahm J, Lotz J. Simultaneous real-time flow dynamics in the azygos vein and descending aorta during physiological stress. ROFO-FORTSCHR RONTG 2014. [DOI: 10.1055/s-0034-1372876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Sohns JM, Staab W, Menke J, Spiro JE, Bergau L, Kowallick JT, Schwarz A, Panahi B, Fasshauer M, Dorenkamp M, Sohns C, Lotz J. Clinical assessment of vascular and extra-vascular pathologies in patients undergoing magnetic resonance angiography of the abdomen, pelvis and lower extremities. ROFO-FORTSCHR RONTG 2014. [DOI: 10.1055/s-0034-1373575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Staab W, Sohns C, Zwaka PA, Sohns JM, Schwarz A, Schneider S, Vollmann D, Zabel M, Hasenfuß G, Lotz J. Split-bolus single-phase cardiac multidetector computed tomography for reliable detection of left atrial thrombus: comparison to transesophageal echocardiography. ROFO-FORTSCHR RONTG 2014; 186:1009-15. [PMID: 24729408 DOI: 10.1055/s-0034-1366247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
PURPOSE Evaluation of a new cardiac MDCT protocol using a split-bolus contrast injection protocol and single MDCT scan for reliable diagnosis of LA/LAA thrombi in comparison to TEE, optimizing radiation exposure and use of contrast agent. MATERIALS AND METHODS A total of 182 consecutive patients with drug refractory AF scheduled for PVI (62.6 % male, mean age: 64.1 ± 10.2 years) underwent routine diagnostic work including TEE and cardiac MDCT for the evaluation of LA/LAA anatomy and thrombus formation between November 2010 and March 2012. Contrast media injection was split into a pre-bolus of 30 ml and main bolus of 70 ml iodinated contrast agent separated by a short time delay. RESULTS In this study, split-bolus cardiac MDCT identified 14 of 182 patients with filling defects of the LA/LAA. In all of these 14 patients, abnormalities were found in TEE. All 5 of the 14 patients with thrombus formation in cardiac MDCT were confirmed by TEE. CONCLUSION MDCT was 100 % accurate for thrombus, with strong but not perfect overall results for SEC equivalent on MDCT. KEY POINTS • Patients with no filling defect or thrombus in MDCT in the LA/LAA region are unlikely to have thrombus and may undergo PVI without TEE.• Here, the role of an additional TEE in pre-procedural management prior to PVI in patients with AF has to be redefined.• Using a split-bolus injection protocol increases the diagnostic accuracy of thrombus in the LA/LAA region.
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Affiliation(s)
- W Staab
- Institute for Diagnostic and Interventional Radiology, University Medical Center of Georg-August-University, Goettingen
| | - C Sohns
- Dept. of Cardiology and Pneumology, Georg-August-University Goettingen, Germany, Goettingen
| | - P A Zwaka
- Institute for Diagnostic and Interventional Radiology, University Medical Center of Georg-August-University, Goettingen
| | - J M Sohns
- Institute for Diagnostic and Interventional Radiology, University Medical Center of Georg-August-University, Goettingen
| | - A Schwarz
- Institute for Diagnostic and Interventional Radiology, University Medical Center of Georg-August-University, Goettingen
| | - S Schneider
- Dept. of Medical Statistics, Georg-August-University Goettingen
| | - D Vollmann
- Dept. of Cardiology and Pneumology, Georg-August-University Goettingen, Germany, Goettingen
| | - M Zabel
- Dept. of Cardiology and Pneumology, Georg-August-University Goettingen, Germany, Goettingen
| | - G Hasenfuß
- Dept. of Cardiology and Pneumology, Georg-August-University Goettingen, Germany, Goettingen
| | - J Lotz
- Institute for Diagnostic and Interventional Radiology, University Medical Center of Georg-August-University, Goettingen
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Sohns JM, Menke J, Staab W, Spiro J, Fasshauer M, Kowallick JT, Bergau L, Zwaka PA, Unterberg-Buchwald C, Lotz J, Schwarz A. Current role of cardiac and extra-cardiac pathologies in clinically indicated cardiac computed tomography with emphasis on status before pulmonary vein isolation. ROFO-FORTSCHR RONTG 2014; 186:860-7. [PMID: 24648234 DOI: 10.1055/s-0034-1366107] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
PURPOSE The aim of this study was to assess the incidence of cardiac and significant extra-cardiac findings in clinical computed tomography of the heart in patients with atrial fibrillation before pulmonary vein isolation (PVI). MATERIALS AND METHODS 224 patients (64 ± 10 years; male 63 %) with atrial fibrillation were examined by cardiac 64-slice multidetector CT before PVI. Extra-cardiac findings were classified as "significant" if they were recommended to additional diagnostics or therapy, and otherwise as "non-significant". Additionally, cardiac findings were documented in detail. RESULTS A total of 724 cardiac findings were identified in 203 patients (91 % of patients). Additionally, a total of 619 extra-cardiac findings were identified in 179 patients (80 % of patients). Among these extra-cardiac findings 196 (32 %) were "significant", and 423 (68 %) were "non-significant". In 2 patients (1 %) a previously unknown malignancy was detected (esophageal cancer and lung cancer, local stage, no metastasis). 203 additional imaging diagnostics followed to clarify the "significant" findings (124 additional CT, costs 38 314.69 US dollars). Overall, there were 3.2 cardiac and 2.8 extra-cardiac findings per patient. Extra-cardiac findings appear significantly more frequently in patients over 60 years old, in smokers and in patients with a history of cardiac findings (p <0.05). CONCLUSION Cardiac CT scans before PVI should be screened for extracardiac incidental findings that could have important clinical implications for each patient.
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Affiliation(s)
- J M Sohns
- Institute for Diagnostic and Interventional Radiology, University Medical Center of Georg-August-University, Goettingen
| | - J Menke
- Institute for Diagnostic and Interventional Radiology, University Medical Center of Georg-August-University, Goettingen
| | - W Staab
- Institute for Diagnostic and Interventional Radiology, University Medical Center of Georg-August-University, Goettingen
| | - J Spiro
- Radiology, University Hospital of Cologne
| | - M Fasshauer
- Institute for Diagnostic and Interventional Radiology, University Medical Center of Georg-August-University, Goettingen
| | - J T Kowallick
- Institute for Diagnostic and Interventional Radiology, University Medical Center of Georg-August-University, Goettingen
| | - L Bergau
- Cardiology and Pneumology, University Medical Center of Georg-August-University, Goettingen
| | - P A Zwaka
- Institute for Diagnostic and Interventional Radiology, University Medical Center of Georg-August-University, Goettingen
| | - C Unterberg-Buchwald
- Cardiology and Pneumology, University Medical Center of Georg-August-University, Goettingen
| | - J Lotz
- Institute for Diagnostic and Interventional Radiology, University Medical Center of Georg-August-University, Goettingen
| | - A Schwarz
- Institute for Diagnostic and Interventional Radiology, University Medical Center of Georg-August-University, Goettingen
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Lotz J, Sohns JM, Staab W, Unterberg C, Schwarz A, Steinmetz M. Follow-Up nach Therapie. ROFO-FORTSCHR RONTG 2013. [DOI: 10.1055/s-0033-1346160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Kowallick JT, Sohns JM, Unterberg-Buchwald C, Schulte C, Staab W, Merboldt KD, Voit D, Zhang S, Joseph AA, Frahm J, Lotz J. Hochauflösende Echtzeit-Cardio-MRT Flussmessung im Vergleich zur Cine Phasenkontrast-Flussmessung. ROFO-FORTSCHR RONTG 2013. [DOI: 10.1055/s-0033-1346231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Staab W, Sohns C, Zwaka PA, Schwarz A, Sohns JM, Lotz J. Monphasisches Doppel-Bolus Kardio-MDCT zur validen Detektion von Thromben im linken Vorhof und Vorhofohr: ein Vergleich zur transösophagealen Echokardiografie. ROFO-FORTSCHR RONTG 2013. [DOI: 10.1055/s-0033-1346477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Sohns JM, Menke J, Staab W, Spiro JE, Kowallick JT, Schulte C, Becker O, Zwaka PA, Unterberg-Buchwald C, Lotz J, Schwarz A. Cardiac and extra-cardiac pathologies in patients undergoing clinically indicated cardiac computed tomography. ROFO-FORTSCHR RONTG 2013. [DOI: 10.1055/s-0033-1346617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Sohns JM, Schwarz A, Menke J, Staab W, Spiro JE, Kowallick JT, Schulte C, Becker O, Zwaka PA, Lotz J, Unterberg-Buchwald C. Prevalence and clinical relevance of extra-cardiac findings at cardiac magnetic resonance imaging. ROFO-FORTSCHR RONTG 2013. [DOI: 10.1055/s-0033-1346616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Sohns JM, Gröschel S, Baudewig J, Becker L, Schmidt-Samoa C, Menke J, Staab W, Lotz J, Dechent A, Kastrup A. Funktionelle MRT mit Negativen BOLD-Signalveränderungen im Primären Somatosensorischen Kortex unter Einluss des Alterns. ROFO-FORTSCHR RONTG 2013. [DOI: 10.1055/s-0033-1346639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Sohns JM, Kowallick JT, Unterberg-Buchwald C, Staab W, Joseph A, Merboldt KD, Uecker M, Voit D, Zhang S, Frahm J, Lotz J. Echtzeit-Cardio-MRT-Phasenkontrast-Flussmessungen mit dem Valsalva- und Müllermaneuver als Stresstest. ROFO-FORTSCHR RONTG 2013. [DOI: 10.1055/s-0033-1346232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Sohns C, Sohns JM, Bergau L, Sossalla S, Vollmann D, Luthje L, Staab W, Dorenkamp M, Harrison JL, O'Neill MD, Lotz J, Zabel M. Pulmonary vein anatomy predicts freedom from atrial fibrillation using remote magnetic navigation for circumferential pulmonary vein ablation. Europace 2013; 15:1136-42. [DOI: 10.1093/europace/eut059] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Sohns JM, Sohns C, Staab W, Vollmann D, Lüthje L, Zwaka PA, Zabel M, Hasenfuß G, Lotz J. Prognostischer Stellenwert der links-atrialen Dimensionen vor Pulmonalvenenisolation bei Patienten mit Vorhofflimmern: Vergleich zwischen Echokardiographie & Multidetektor-Computertomographie (MDCT). ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0032-1311444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Sohns JM, Joseph AA, Merboldt KD, Voit D, Zhang S, Uecker M, Lotz J, Frahm J. Quantitative Phasenkontrast-MRT der Aorta in Echtzeit: radiales FLASH mit Unterabtastung und nichtlinearer inverser Rekonstruktion. ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0031-1300915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Sohns JM, Staab W, Sohns C, Vollmann D, Lüthje L, Zwaka PA, Zabel M, Hasenfuß G, Lotz J. Prognostischer Stellenwert der links-atrialen Dimensionen vor Pulmonalvenenisolation bei Patienten mit Vorhofflimmern: Vergleich zwischen Echokardiografie & Multidetektor-Computertomografie (MDCT). ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0031-1300858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Sohns JM, Staab W, Sohns C, Seif A, Streit U, Kertesz A, Zwaka P, Lotz J. Aktueller Stellenwert der Multi-Detektor-Computertomographie bei Patienten mit Mittelgesichtstrauma. ROFO-FORTSCHR RONTG 2011. [DOI: 10.1055/s-0031-1279593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
22
|
Schnaudigel S, Becker L, Sohns JM, Baudewig J, Dechent P, Kastrup A. Effects of age on functional deactivation in the somatosensory system. Akt Neurol 2007. [DOI: 10.1055/s-2007-987682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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