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Abstract
It is essential that educators select a primary learning medium for a student with functional vision. In this article, definitions for primary and secondary learning media are presented. Five major considerations for determining the most appropriate learning medium are discussed: 1) working distance from the page; 2) portability of reading skills; 3) reading rates and accuracy; 4) visual fatigue; and 5) interpreting assessment results. The authors also present practical perspectives in enforcing positive attitudes in the student whatever the primary learning medium.
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Affiliation(s)
- S. Mangold
- Special Education, San Francisco State University, 1600 Holloway, San Francisco, CA 94132
| | - P. Mangold
- Exceptional Teaching Aids, 20102 Woodbine Avenue, Castro Valley, CA 94546
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Osowiecka K, Sroda R, Saied A, Szwiec M, Mangold S, Osuch D, Nawrocki S, Rucinska M. Does the healthcare system approaches cancer patients for using private services during diagnostic process? Ann Oncol 2019. [DOI: 10.1093/annonc/mdz263.033] [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: 11/15/2022] Open
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3
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Krumm P, Krauß S, Mangold S, Zitzelsberger T, Klumpp BD, Nikolaou K, Nieß AM, Kramer U, Burgstahler C. Mid-term development of the right ventricle in competitive athletes. Acta Radiol 2018; 59:1422-1430. [PMID: 29566549 DOI: 10.1177/0284185118764203] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND Long-term intensive training induces physiological, morphological, and functional adaption of the athlete's heart. PURPOSE To evaluate the development of athlete's heart during a mid-term follow-up of competitive athletes using cardiac magnetic resonance (CMR). MATERIAL AND METHODS Eighteen competitive long-distance runners and triathletes (age 43 ± 13 years, 3 women) were prospectively examined in a longitudinal follow-up study 5.05 ± 0.6 years after baseline. CMR at 1.5-T was performed for functional and late gadolinium enhancement (LGE) imaging. Left ventricular (LV) and right ventricular (RV) end-diastolic volume (LVEDV, RVEDV) as well as ejection fraction (LVEF, RVEF), LV myocardial mass (LVMM), and atrial sizes were determined and compared to baseline in matched pairs statistics for paired difference. RESULTS LVEDV (197 ± 38 mL vs. 196 ± 38 mL, paired difference -0.9 mL, P = 0.7) and LVEF (62 ± 7% vs. 62 ± 5%, paired difference 0.1%, P = 0.9) did not change during the follow-up period, whereas LVMM increased significantly (149 ± 31 g vs.164 ± 32 g, paired difference 14 g, P < 0.0001). RVEDV significantly increased from 221 ± 47 mL at baseline to 230 ± 52 mL (paired difference 10 mL, P = 0.0033). RVEF decreased from baseline 57 ± 8% to 53 ± 7% (paired difference -3%, P = 0.0234). Left atrial size showed no significant changes (24 ± 5 cm2 vs. 25 ± 6 cm2, paired difference 0.5 cm2, P = 0.17) and right atrial size increased significantly (30 ± 5 cm2 vs. 32 ± 4 cm2, paired difference 2 cm2, P = 0.0054). CONCLUSION This study supports the theory of ongoing remodeling in an athlete's heart. Predominantly the right heart can further enlarge in a mid-term period. This response seems not linearly dependent on a steady, decreased, or increased training volume.
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Affiliation(s)
- Patrick Krumm
- Department of Diagnostic and Interventional Radiology, Eberhard Karls University of Tübingen, Tübingen, Germany
| | - Stefan Krauß
- Department of Internal Medicine V, Sports Medicine, Eberhard Karls University of Tübingen, Tübingen, Germany
| | - Stefanie Mangold
- Department of Diagnostic and Interventional Radiology, Eberhard Karls University of Tübingen, Tübingen, Germany
| | - Tanja Zitzelsberger
- Department of Diagnostic and Interventional Radiology, Eberhard Karls University of Tübingen, Tübingen, Germany
| | - Bernhard D Klumpp
- Department of Diagnostic and Interventional Radiology, Eberhard Karls University of Tübingen, Tübingen, Germany
- Department of Radiology, Rems-Murr-Clinic, Winnenden, Germany
| | - Konstantin Nikolaou
- Department of Diagnostic and Interventional Radiology, Eberhard Karls University of Tübingen, Tübingen, Germany
| | - Andreas M Nieß
- Department of Internal Medicine V, Sports Medicine, Eberhard Karls University of Tübingen, Tübingen, Germany
| | - Ulrich Kramer
- Department of Diagnostic and Interventional Radiology, Eberhard Karls University of Tübingen, Tübingen, Germany
- Department of Radiology, Rems-Murr-Clinic, Winnenden, Germany
| | - Christof Burgstahler
- Department of Internal Medicine V, Sports Medicine, Eberhard Karls University of Tübingen, Tübingen, Germany
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Krumm P, Mangold S, Gatidis S, Nikolaou K, Nensa F, Bamberg F, la Fougère C. Clinical use of cardiac PET/MRI: current state-of-the-art and potential future applications. Jpn J Radiol 2018. [PMID: 29524169 DOI: 10.1007/s11604-018-0727-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Combined PET/MRI is a novel imaging method integrating the advances of functional and morphological MR imaging with PET applications that include assessment of myocardial viability, perfusion, metabolism of inflammatory tissue and tumors, as well as amyloid deposition imaging. As such, PET/MRI is a promising tool to detect and characterize ischemic and non-ischemic cardiomyopathies. To date, the greatest benefit may be expected for diagnostic evaluation of systemic diseases and cardiac masses that remain unclear in cardiac MRI, as well as for clinical and scientific studies in the setting of ischemic cardiomyopathies. Diagnosis and therapeutic monitoring of cardiac sarcoidosis has the potential of a possible 'killer-application' for combined cardiac PET/MRI. In this article, we review the current evidence and discuss current and potential future applications of cardiac PET/MRI.
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Affiliation(s)
- Patrick Krumm
- Department of Radiology, Diagnostic and Interventional Radiology, University of Tübingen, Hoppe-Seyler-Str. 3, 72076, Tübingen, Germany.
| | - Stefanie Mangold
- Department of Radiology, Diagnostic and Interventional Radiology, University of Tübingen, Hoppe-Seyler-Str. 3, 72076, Tübingen, Germany
| | - Sergios Gatidis
- Department of Radiology, Diagnostic and Interventional Radiology, University of Tübingen, Hoppe-Seyler-Str. 3, 72076, Tübingen, Germany
| | - Konstantin Nikolaou
- Department of Radiology, Diagnostic and Interventional Radiology, University of Tübingen, Hoppe-Seyler-Str. 3, 72076, Tübingen, Germany
| | - Felix Nensa
- Department of Diagnostic and Interventional Radiology and Neuroradiology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Fabian Bamberg
- Department of Radiology, Diagnostic and Interventional Radiology, University of Tübingen, Hoppe-Seyler-Str. 3, 72076, Tübingen, Germany
| | - Christian la Fougère
- Department of Radiology, Nuclear Medicine and Clinical Molecular Imaging, University of Tübingen, Tübingen, Germany
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Burgstahler C, Cipowicz H, Thomas C, Schabel C, Mangold S, Ketelsen D, Claussen CD, Niess AM, Tsiflikas I. Coronary and carotid atherosclerosis in asymptomatic male marathon runners. Scand J Med Sci Sports 2018; 28:1397-1403. [PMID: 29239051 DOI: 10.1111/sms.13035] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/04/2017] [Indexed: 12/17/2022]
Abstract
The aim of the study was to evaluate the diagnostic accuracy of carotid ultrasound (CU) to predict coronary atherosclerosis in asymptomatic male marathon runners. A total of 49 male marathon runners older than 45 years (mean age 53.3 ± 7.2 years, range 45-74 years) received CU and cardiac CT angiography (CTA) including calcium scoring (CS). Results of CU and CTA were classified binary: 1. Absence of atherosclerosis and 2. Presence of atherosclerosis. The extent of atherosclerosis was not primary end point of the study. Mean PROCAM score was 2.3% (SD 2.2, range 0.44%-12.34%). One person had to be excluded from analysis (one missing CT-scan). From the remaining 48 marathon runners, 17 (35.4%) had carotid atherosclerosis and 22 (45.8%) coronary atherosclerosis. Atherosclerosis in either exam was diagnosed in 27/48 (56.3%) marathon runners. Diagnostic accuracy of CU to predict coronary atherosclerosis was: sensitivity 54.55% (95% CI 32.2-75.6), specificity 80.8% (CI 60.6-93.4), positive predictive value 70.6 (CI 44.1-89.9), negative predictive value 67.7 (CI 48.6-83.3) with a positive likelihood ratio of 2.84 (CI 1.18-6.82) and a negative likelihood ratio of 0.56 (CI 0.34-0.92). Coronary and/or carotid atherosclerosis can be detected in more than 50% of male marathon runners aged older than 45 years. The diagnostic value of carotid ultrasound to predict coronary atherosclerosis is low but higher than the accuracy of rest- or stress-ECG. As outcome studies in sportsmen are still missing, the routine evaluation of the carotid arteries by ultrasound or even cardiac CT cannot be recommended at present. Furthermore, the incidence of atherosclerosis by our method in normal population is not known.
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Affiliation(s)
- C Burgstahler
- Department of Sports Medicine, University of Tuebingen, Tuebingen, Germany
| | - H Cipowicz
- Department of Sports Medicine, University of Tuebingen, Tuebingen, Germany
| | - C Thomas
- Department of Diagnostic and Interventional Radiology, University of Tuebingen, Tuebingen, Germany
| | - C Schabel
- Department of Diagnostic and Interventional Radiology, University of Tuebingen, Tuebingen, Germany
| | - S Mangold
- Department of Diagnostic and Interventional Radiology, University of Tuebingen, Tuebingen, Germany
| | - D Ketelsen
- Department of Diagnostic and Interventional Radiology, University of Tuebingen, Tuebingen, Germany
| | - C D Claussen
- Department of Diagnostic and Interventional Radiology, University of Tuebingen, Tuebingen, Germany
| | - A M Niess
- Department of Sports Medicine, University of Tuebingen, Tuebingen, Germany
| | - I Tsiflikas
- Department of Diagnostic and Interventional Radiology, University of Tuebingen, Tuebingen, Germany
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Zimina A, Dardenne K, Denecke MA, Doronkin DE, Huttel E, Lichtenberg H, Mangold S, Pruessmann T, Rothe J, Spangenberg T, Steininger R, Vitova T, Geckeis H, Grunwaldt JD. CAT-ACT-A new highly versatile x-ray spectroscopy beamline for catalysis and radionuclide science at the KIT synchrotron light facility ANKA. Rev Sci Instrum 2017; 88:113113. [PMID: 29195371 DOI: 10.1063/1.4999928] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
CAT-ACT-the hard X-ray beamline for CATalysis and ACTinide/radionuclide research at the KIT synchrotron radiation facility ANKA-is dedicated to X-ray spectroscopy, including "flux hungry" photon-in/photon-out and correlative techniques and combines state-of-the-art optics with a unique infrastructure for radionuclide and catalysis research. Measurements can be performed at photon energies varying between 3.4 keV and 55 keV, thus encompassing the actinide M- and L-edge or potassium K-edge up to the K-edges of the lanthanide series such as cerium. Well-established X-ray absorption fine structure spectroscopy in transmission and fluorescence detection modes is available in combination with high energy-resolution X-ray emission spectroscopy or X-ray diffraction techniques. The modular beamline design with two alternately operated in-line experimental stations enables sufficient flexibility to adapt sample environments and detection systems to many scientific challenges. The ACT experimental station focuses on various aspects of nuclear waste disposal within the mission of the Helmholtz association to contribute to the solution of one of the greatest scientific and social challenges of our time-the safe disposal of heat producing, highly radioactive waste forms from nuclear energy production. It augments present capabilities at the INE-Beamline by increasing the flux and extending the energy range into the hard X-ray regime. The CAT experimental station focuses on catalytic materials, e.g., for energy-related and exhaust gas catalysis. Characterization of catalytically active materials under realistic reaction conditions and the development of in situ and operando cells for sample environments close to industrial reactors are essential aspects at CAT.
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Affiliation(s)
- A Zimina
- Institute of Catalysis Research and Technology (IKFT), Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany
| | - K Dardenne
- Institute for Nuclear Waste Disposal (INE), Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany
| | - M A Denecke
- The University of Manchester, Dalton Nuclear Institute, Manchester, United Kingdom
| | - D E Doronkin
- Institute of Catalysis Research and Technology (IKFT), Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany
| | - E Huttel
- Institute for Beam Physics and Technology (IBPT), Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany
| | - H Lichtenberg
- Institute of Catalysis Research and Technology (IKFT), Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany
| | - S Mangold
- Institute for Photon Science and Synchrotron Radiation (IPS), Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany
| | - T Pruessmann
- Institute of Catalysis Research and Technology (IKFT), Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany
| | - J Rothe
- Institute for Nuclear Waste Disposal (INE), Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany
| | - Th Spangenberg
- Institute for Beam Physics and Technology (IBPT), Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany
| | - R Steininger
- Institute for Photon Science and Synchrotron Radiation (IPS), Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany
| | - T Vitova
- Institute for Nuclear Waste Disposal (INE), Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany
| | - H Geckeis
- Institute for Nuclear Waste Disposal (INE), Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany
| | - J-D Grunwaldt
- Institute of Catalysis Research and Technology (IKFT), Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany
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Krumm P, Keuler JD, Mangold S, Zitzelsberger T, Ruff CA, Klumpp BD, Martirosian P, Nikolaou K, Burgstahler C, Kramer U. Single-Breath-Hold Evaluation of Cardiac Function with Use of Time-Resolved Parallel Cardiac Magnetic Resonance. Tex Heart Inst J 2017; 44:252-259. [PMID: 28878578 DOI: 10.14503/thij-15-5599] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Using cardiac magnetic resonance, we tested whether a single-breath-hold approach to cardiac functional evaluation was equivalent to the established multiple-breath-hold method. We examined 39 healthy volunteers (mean age, 31.9 ± 11.4 yr; 22 men) by using 1.5 T with multiple breath-holds and our proposed single breath-hold. Left ventricular and right ventricular ejection fractions (LVEF and RVEF), LV and RV end-diastolic volumes (LVEDV and RVEDV), and LV myocardial mass (LVMM) were compared by using Bland-Altman plots; LVEF and RVEF were tested for equivalence by inclusion of 95% confidence intervals (CIs). Equivalence of the methods was assumed within the range of -5% to 5%. In the multiple- versus the single-breath-hold method, LVEF was 0.62 ± 0.05 versus 0.62 ± 0.04, and RVEF was 0.59 ± 0.06 versus 0.59 ± 0.07. The mean difference in both methods was -0.2% (95% CI, -1 to 0.6) for LVEF and 0.3% (95% CI, -0.8 to 1.5) for RVEF. The mean differences between methods fit within the predetermined range of equivalence, including the 95% CI. The mean relative differences between the methods were 3.8% for LVEDV, 4.5% for RVEDV, and 1.6% for LVMM. Results of our single-breath-hold method to evaluate LVEF and RVEF were equivalent to those of the multiple-breath-hold technique. In addition, LVEDV, RVEDV, and LVMM showed low bias between methods.
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Caruso D, Parinella AH, Schoepf UJ, Stroebel MH, Mangold S, Wichmann JL, Varga-Szemes A, Ball BD, De Santis D, Laghi A, De Cecco CN. Optimization of window settings for standard and advanced virtual monoenergetic imaging in abdominal dual-energy CT angiography. Abdom Radiol (NY) 2017; 42:772-780. [PMID: 27878637 DOI: 10.1007/s00261-016-0963-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
OBJECTIVES To determine the optimal window setting for displaying virtual monoenergetic reconstructions of third generation dual-source, dual-energy CT (DECT) angiography of the abdomen. METHODS Forty-five patients were evaluated with DECT angiography (90/150 kV, 180/90 ref. mAs). Three datasets were reconstructed: standard linear blending (M_0.6), 70 keV traditional virtual monoenergetic (M70), and 40 keV advanced noise-optimized virtual monoenergetic (M40+). The best window setting (width and level, W/L) was assessed by two blinded observers and was correlated with aortic attenuation to obtain the Optimized W/L setting (O-W/L). Subjective image quality was assessed, and vessel diameters were measured to determine any possible influences between different W/L settings. Repeated measures of variance were used to evaluate comparison of W/L values, image quality, and vessel sizing between M_0.6, M70, and M40+. RESULTS The Best W/L (B-W/L) for M70 and M40+ was 880/280 and 1410/450, respectively. Results from regression analysis inferred an O-W/L of 850/270 for M70 and 1350/430 for M40+. Significant differences for W and L were found between the Best and the Optimized W/L for M40+, and between M70 and M40+ for both the Best and Optimized W/L. No significant differences for vessel measurements were found using the O-W/L for M40+ compared to the standard M_0.6 (p ≥ 0.16), and significant differences were observed when using the B-W/L with M40+ compared to M_0.6 (p ≤ 0.04). CONCLUSION In order to optimize virtual monoenergetic imaging with both traditional M70 and advanced M40+, adjusting the W/L settings is necessary. Our results suggest a W/L setting of 850/270 for M70 and 1350/430 for M40+.
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Affiliation(s)
- Damiano Caruso
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Ashley River Tower, MSC 226, 25 Courtenay Drive, Charleston, SC, 29425, USA
- Department of Radiological Sciences, Oncological and Pathological Sciences, University of Rome "Sapienza", Latina, Italy
| | - Ashley H Parinella
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Ashley River Tower, MSC 226, 25 Courtenay Drive, Charleston, SC, 29425, USA
| | - U Joseph Schoepf
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Ashley River Tower, MSC 226, 25 Courtenay Drive, Charleston, SC, 29425, USA.
- Division of Cardiology, Department of MedicineMedical, University of South Carolina, Charleston, SC, USA.
| | - Maxwell H Stroebel
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Ashley River Tower, MSC 226, 25 Courtenay Drive, Charleston, SC, 29425, USA
| | - Stefanie Mangold
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Ashley River Tower, MSC 226, 25 Courtenay Drive, Charleston, SC, 29425, USA
- Department of Diagnostic and Interventional Radiology, Eberhard-Karls University Tuebingen, Tuebingen, Germany
| | - Julian L Wichmann
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Ashley River Tower, MSC 226, 25 Courtenay Drive, Charleston, SC, 29425, USA
- Department of Diagnostic and Interventional Radiology, University Hospital Frankfurt, Frankfurt, Germany
| | - Akos Varga-Szemes
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Ashley River Tower, MSC 226, 25 Courtenay Drive, Charleston, SC, 29425, USA
| | - B Devon Ball
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Ashley River Tower, MSC 226, 25 Courtenay Drive, Charleston, SC, 29425, USA
| | - Domenico De Santis
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Ashley River Tower, MSC 226, 25 Courtenay Drive, Charleston, SC, 29425, USA
- Department of Radiological Sciences, Oncological and Pathological Sciences, University of Rome "Sapienza", Latina, Italy
| | - Andrea Laghi
- Department of Radiological Sciences, Oncological and Pathological Sciences, University of Rome "Sapienza", Latina, Italy
| | - Carlo N De Cecco
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Ashley River Tower, MSC 226, 25 Courtenay Drive, Charleston, SC, 29425, USA
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Weiss J, Notohamiprodjo M, Bongers M, Schabel C, Mangold S, Nikolaou K, Bamberg F, Othman AE. Noise-optimized monoenergetic post-processing improves visualization of incidental pulmonary embolism in cancer patients undergoing single-pass dual-energy computed tomography. Radiol Med 2017; 122:280-287. [PMID: 28070843 DOI: 10.1007/s11547-016-0717-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Accepted: 12/12/2016] [Indexed: 11/28/2022]
Abstract
PURPOSE To evaluate noise-optimized monoenergetic postprocessing of dual-energy CT (DE-CT) on image quality in patients with incidental pulmonary embolism in single-pass portal-venous phase CT (CTpv). MATERIALS AND METHODS 20 Consecutive patients with incidental pulmonary embolism in contrast-enhanced oncological follow-up DE-CTpv examination were included in this study. Images were acquired with a 3rd generation DE-CT system in DE mode (100/Sn150 kV) and activated tube current modulation 90 s after contrast agent administration. Subsequently, virtual monoenergetic images (MEI+) were reconstructed at five different keV levels (40, 55, 70, 85, 100) and compared to the standard linearly blended (M_0.8) CTpv images. Image quality was assessed qualitatively (vascular contrast and detectability of embolism, image noise, iodine influx artifact; two independent readers; 5-point Likert scale; 5 = excellent) and quantitatively by calculating signal-to-noise (SNR) and contrast-to-noise ratios (CNR). RESULTS Highest vessel contrast and highest detectability of embolism were observed in MEI+ at 40 keV (4.7 ± 0.4) and 55 keV (4.2 ± 0.6) with significant differences as compared to CTpv (3.6 ± 0.5) and high keV reconstructions (70, 85, 100; p ≤ 0.01). Image noise significantly increased at 40 keV MEI+ compared to all other MEI+ reconstructions and CTpv (p < 0.001). SNR and CNR calculations were highest at 40 keV MEI+ followed by 55 keV and CTpv with significant differences to high keV MEI+ (85-100). CONCLUSIONS Computed MEI+ at low keV levels allow for improved vessel contrast and visualisation of incidental pulmonary embolism in patients with portal-venous phase CT scans by substantially increasing CNR and SNR.
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Affiliation(s)
- Jakob Weiss
- Department of Diagnostic and Interventional Radiology, Eberhard Karls University Tuebingen, Hoppe-Seyler-Straße 3, 72076, Tübingen, Germany.
| | - Mike Notohamiprodjo
- Department of Diagnostic and Interventional Radiology, Eberhard Karls University Tuebingen, Hoppe-Seyler-Straße 3, 72076, Tübingen, Germany
| | - Malte Bongers
- Department of Diagnostic and Interventional Radiology, Eberhard Karls University Tuebingen, Hoppe-Seyler-Straße 3, 72076, Tübingen, Germany
| | - Christoph Schabel
- Department of Diagnostic and Interventional Radiology, Eberhard Karls University Tuebingen, Hoppe-Seyler-Straße 3, 72076, Tübingen, Germany
| | - Stefanie Mangold
- Department of Diagnostic and Interventional Radiology, Eberhard Karls University Tuebingen, Hoppe-Seyler-Straße 3, 72076, Tübingen, Germany
| | - Konstantin Nikolaou
- Department of Diagnostic and Interventional Radiology, Eberhard Karls University Tuebingen, Hoppe-Seyler-Straße 3, 72076, Tübingen, Germany
| | - Fabian Bamberg
- Department of Diagnostic and Interventional Radiology, Eberhard Karls University Tuebingen, Hoppe-Seyler-Straße 3, 72076, Tübingen, Germany
| | - Ahmed E Othman
- Department of Diagnostic and Interventional Radiology, Eberhard Karls University Tuebingen, Hoppe-Seyler-Straße 3, 72076, Tübingen, Germany
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Varga-Szemes A, van der Geest RJ, Schoepf UJ, Spottiswoode BS, De Cecco CN, Muscogiuri G, Wichmann JL, Mangold S, Fuller SR, Maurovich-Horvat P, Merkely B, Litwin SE, Vliegenthart R, Suranyi P. Effect of inversion time on the precision of myocardial late gadolinium enhancement quantification evaluated with synthetic inversion recovery MR imaging. Eur Radiol 2017; 27:3235-3243. [PMID: 28050692 DOI: 10.1007/s00330-016-4665-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Revised: 08/24/2016] [Accepted: 11/17/2016] [Indexed: 11/28/2022]
Abstract
OBJECTIVES To evaluate the influence of inversion time (TI) on the precision of myocardial late gadolinium enhancement (LGE) quantification using synthetic inversion recovery (IR) imaging in patients with myocardial infarction (MI). METHODS Fifty-three patients with suspected prior MI underwent 1.5-T cardiac MRI with conventional magnitude (MagIR) and phase-sensitive IR (PSIR) LGE imaging and T1 mapping at 15 min post-contrast. T1-based synthetic MagIR and PSIR images were calculated with a TI ranging from -100 to +150 ms at 5-ms intervals relative to the optimal TI (TI0). LGE was quantified using a five standard deviation (5SD) and full width at half-maximum (FWHM) thresholds. Measurements were compared using one-way analysis of variance. RESULTS The MagIRsy technique provided precise assessment of LGE area at TIs ≥ TI0, while precision was decreased below TI0. The LGE area showed significant differences at ≤ -25 ms compared to TI0 using 5SD (P < 0.001) and at ≤ -65 ms using the FWHM approach (P < 0.001). LGE measurements did not show significant difference over the analysed TI range in the PSIRsy images using either of the quantification methods. CONCLUSIONS T1 map-based PSIRsy images provide precise quantification of MI independent of TI at the investigated time point post-contrast. MagIRsy-based MI quantification is precise at TI0 and at longer TIs while showing decreased precision at TI values below TI0. KEY POINTS • Synthetic IR imaging retrospectively generates LGE images at any theoretical TI • Synthetic IR imaging can simulate the effect of TI on LGE quantification • Fifteen minutes post-contrast MagIR sy accurately quantifies infarcts from TI 0 to TI 0 + 150 ms • Fifteen minutes post-contrast PSIR sy provides precise infarct size independent of TI • Synthetic IR imaging has further advantages in reducing operator dependence.
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Affiliation(s)
- Akos Varga-Szemes
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Ashley River Tower, 25 Courtenay Drive, Charleston, SC, 29425-2260, USA
| | - Rob J van der Geest
- Department of Radiology, Leiden University Medical Center, Leiden, The Netherlands
| | - U Joseph Schoepf
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Ashley River Tower, 25 Courtenay Drive, Charleston, SC, 29425-2260, USA.
| | | | - Carlo N De Cecco
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Ashley River Tower, 25 Courtenay Drive, Charleston, SC, 29425-2260, USA
| | - Giuseppe Muscogiuri
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Ashley River Tower, 25 Courtenay Drive, Charleston, SC, 29425-2260, USA
- Department of Imaging, Bambino Gesu Children's Hospital IRCCS, Rome, Italy
| | - Julian L Wichmann
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Ashley River Tower, 25 Courtenay Drive, Charleston, SC, 29425-2260, USA
- Department of Diagnostic and Interventional Radiology, University Hospital Frankfurt, Frankfurt, Germany
| | - Stefanie Mangold
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Ashley River Tower, 25 Courtenay Drive, Charleston, SC, 29425-2260, USA
- Department of Diagnostic and Interventional Radiology, Eberhard-Karls University Tuebingen, Tuebingen, Germany
| | - Stephen R Fuller
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Ashley River Tower, 25 Courtenay Drive, Charleston, SC, 29425-2260, USA
| | - Pal Maurovich-Horvat
- MTA-SE Cardiovascular Imaging Research Group, Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Bela Merkely
- MTA-SE Cardiovascular Imaging Research Group, Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Sheldon E Litwin
- Division of Cardiology, Department of Medicine, Medical University of South Carolina, Charleston, SC, USA
| | - Rozemarijn Vliegenthart
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Ashley River Tower, 25 Courtenay Drive, Charleston, SC, 29425-2260, USA
- Center for Medical Imaging-North East Netherlands, Department of Radiology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Pal Suranyi
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Ashley River Tower, 25 Courtenay Drive, Charleston, SC, 29425-2260, USA
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11
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Mangold S, De Cecco CN, Schoepf UJ, Kuhlman TS, Varga-Szemes A, Caruso D, Duguay TM, Tesche C, Vogl TJ, Nikolaou K, Steinberg DH, Wichmann JL. CT angiography for planning transcatheter aortic valve replacement using automated tube voltage selection: Image quality and radiation exposure. Eur J Radiol 2017; 86:276-283. [DOI: 10.1016/j.ejrad.2016.11.023] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2016] [Revised: 09/19/2016] [Accepted: 11/22/2016] [Indexed: 11/30/2022]
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12
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Muscogiuri G, Rehwald WG, Schoepf UJ, Suranyi P, Litwin SE, De Cecco CN, Wichmann JL, Mangold S, Caruso D, Fuller SR, Bayer Nd RR, Varga-Szemes A. T(Rho) and magnetization transfer and INvErsion recovery (TRAMINER)-prepared imaging: A novel contrast-enhanced flow-independent dark-blood technique for the evaluation of myocardial late gadolinium enhancement in patients with myocardial infarction. J Magn Reson Imaging 2016; 45:1429-1437. [PMID: 27690324 DOI: 10.1002/jmri.25498] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Accepted: 09/14/2016] [Indexed: 11/11/2022] Open
Abstract
PURPOSE To evaluate a new dark-blood late gadolinium enhancement (LGE) technique called "T(Rho) And Magnetization transfer and INvErsion Recovery" (TRAMINER) for the ability to detect myocardial LGE versus standard "bright-blood" inversion recovery (SIR) imaging. MATERIALS AND METHODS This Institutional Review Board (IRB)-approved, Health Insurance Portability and Accountability Act (HIPAA)-compliant prospective study included 40 patients (62 ± 14 years [mean ± standard deviation (SD)], 29 males) with suspected myocardial infarction (MI) referred for the assessment of myocardial viability. The patients underwent a 1.5T cardiac magnetic resonance imaging (MRI) including postcontrast SIR and TRAMINER acquisitions. Normalized images were evaluated by two readers. Subjective (3-point Likert scale) and objective image qualities were compared using Mann-Whitney U-test and paired t-test, respectively. Interobserver agreement, LGE detection rate, and level of certainty were compared using Cohen's kappa, Wilcoxon-test, and Mann-Whitney U-test, respectively. Results are reported as mean ± SD or mean [95% confidence interval]. RESULTS Overall, image quality was rated similar between TRAMINER and SIR; however, TRAMINER performed better on a visual assessment of the ability to differentiate LGE from blood (Likert scale: 3.0 [3.0-3.0] vs. 2.0 [1.7-2.2], P < 0.0001). TRAMINER provided significantly higher signal intensity range (69.8 ± 10.2 vs. 9.6 ± 7.6, P < 0.0001) and a 4-fold higher signal intensity ratio (4.2 ± 1.9 vs. 1.1 ± 0.1, P < 0.0001) between LGE and blood signals. TRAMINER detected more patients (19/40 vs. 17/40) and segments (91/649 vs. 79/649) with LGE with higher level of certainty (2.9 [2.8-3.0] vs. 2.7 [2.5-2.8], P = 0.0185). Interobserver agreement was good to excellent for LGE detection. CONCLUSION TRAMINER provides better contrast between LGE and blood and consequently may have increased ability to discriminate thin subendocardial and papillary muscle enhancement from the blood signal, which can have an indistinct appearance using SIR. LEVEL OF EVIDENCE 2 J. MAGN. RESON. IMAGING 2017;45:1429-1437.
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Affiliation(s)
- Giuseppe Muscogiuri
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Charleston, South Carolina, USA.,Department of Imaging, Bambino Gesu Children's Hospital IRCCS, Rome, Italy
| | - Wolfgang G Rehwald
- Siemens Medical Solutions, Chicago, Illinois, USA.,Cardiovascular MR Center, Duke University Medical Center, Durham, North Carolina, USA
| | - U Joseph Schoepf
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Pal Suranyi
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Sheldon E Litwin
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Charleston, South Carolina, USA.,Division of Cardiology, Department of Medicine, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Carlo N De Cecco
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Julian L Wichmann
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Charleston, South Carolina, USA.,Department of Diagnostic and Interventional Radiology, University Hospital Frankfurt, Frankfurt, Germany
| | - Stefanie Mangold
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Charleston, South Carolina, USA.,Department of Diagnostic and Interventional Radiology, Eberhard-Karls University Tuebingen, Tuebingen, Germany
| | - Damiano Caruso
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Charleston, South Carolina, USA.,Department of Radiological, Oncological and Pathological Sciences, University of Rome "Sapienza", Rome, Italy
| | - Stephen R Fuller
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Richard R Bayer Nd
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Charleston, South Carolina, USA.,Division of Cardiology, Department of Medicine, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Akos Varga-Szemes
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Charleston, South Carolina, USA
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13
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Mangold S, Wichmann JL, Schoepf UJ, Caruso D, Tesche C, Steinberg DH, Varga-Szemes A, Stubenrauch AC, Bayer RR, Biancalana M, Nikolaou K, De Cecco CN. Diagnostic accuracy of coronary CT angiography using 3 rd-generation dual-source CT and automated tube voltage selection: Clinical application in a non-obese and obese patient population. Eur Radiol 2016; 27:2298-2308. [PMID: 27682312 DOI: 10.1007/s00330-016-4601-2] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Revised: 08/15/2016] [Accepted: 09/07/2016] [Indexed: 12/19/2022]
Abstract
PURPOSE To investigate diagnostic accuracy of 3rd-generation dual-source CT (DSCT) coronary angiography in obese and non-obese patients. METHODS We retrospectively analyzed 76 patients who underwent coronary CT angiography (CCTA) and invasive coronary angiography. Prospectively ECG-triggered acquisition was performed with automated tube voltage selection (ATVS). Patients were dichotomized based on body mass index in groups A (<30 kg/m2, n = 37) and B (≥30 kg/m2, n = 39) and based on tube voltage in groups C (<120 kV, n = 46) and D (120 kV, n = 30). Coronary arteries were assessed for significant stenoses (≥50 % luminal narrowing) and diagnostic accuracy was calculated. RESULTS Per-patient overall sensitivity, specificity, positive predictive value, negative predictive value (NPV) and accuracy were 96.9 %, 95.5 %, 93.9 %, 97.7 % and 96.1 %, respectively. Sensitivity and NPV were lower in groups B and D compared to groups A and C, but no statistically significant differences were observed (group A vs. B: sensitivity, 100.0 % vs. 93.3 %, p = 0.9493; NPV, 100 % vs. 95.5 %, p = 0.9812; group C vs. D: sensitivity, 100.0 % vs. 92.3 %, p = 0.8462; NPV, 100.0 % vs. 94.1 %, p = 0.8285). CONCLUSION CCTA using 3rd-generation DSCT and (ATVS) provides high diagnostic accuracy in both non-obese and obese patients. KEY POINTS • Coronary CTA provides high diagnostic accuracy in non-obese and obese patients. • Diagnostic accuracy between obese and non-obese patients showed no significant difference. • <120 kV studies were performed in 44 % of obese patients. • Current radiation dose-saving approaches can be applied independent of body habitus.
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Affiliation(s)
- Stefanie Mangold
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Ashley River Tower, 25 Courtenay Drive, Charleston, SC, 29425-2260, USA.,Department of Diagnostic and Interventional Radiology, Eberhard-Karls University Tuebingen, Tuebingen, Germany
| | - Julian L Wichmann
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Ashley River Tower, 25 Courtenay Drive, Charleston, SC, 29425-2260, USA.,Department of Diagnostic and Interventional Radiology, University Hospital Frankfurt, Frankfurt, Germany
| | - U Joseph Schoepf
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Ashley River Tower, 25 Courtenay Drive, Charleston, SC, 29425-2260, USA. .,Division of Cardiology, Department of Medicine, Medical University of South Carolina, Charleston, SC, USA.
| | - Damiano Caruso
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Ashley River Tower, 25 Courtenay Drive, Charleston, SC, 29425-2260, USA.,Department of Radiological Sciences, Oncology and Pathology, University of Rome "Sapienza", Rome, Italy
| | - Christian Tesche
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Ashley River Tower, 25 Courtenay Drive, Charleston, SC, 29425-2260, USA.,Department of Cardiology, Heart Centre Munich-Bogenhausen, Munich, Germany
| | - Daniel H Steinberg
- Division of Cardiology, Department of Medicine, Medical University of South Carolina, Charleston, SC, USA
| | - Akos Varga-Szemes
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Ashley River Tower, 25 Courtenay Drive, Charleston, SC, 29425-2260, USA
| | - Andrew C Stubenrauch
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Ashley River Tower, 25 Courtenay Drive, Charleston, SC, 29425-2260, USA
| | - Richard R Bayer
- Division of Cardiology, Department of Medicine, Medical University of South Carolina, Charleston, SC, USA
| | - Matthew Biancalana
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Ashley River Tower, 25 Courtenay Drive, Charleston, SC, 29425-2260, USA
| | - Konstantin Nikolaou
- Department of Diagnostic and Interventional Radiology, Eberhard-Karls University Tuebingen, Tuebingen, Germany
| | - Carlo N De Cecco
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Ashley River Tower, 25 Courtenay Drive, Charleston, SC, 29425-2260, USA
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14
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Caruso D, Eid M, Schoepf UJ, Jin KN, Varga-Szemes A, Tesche C, Mangold S, Spandorfer A, Laghi A, De Cecco CN. Dynamic CT myocardial perfusion imaging. Eur J Radiol 2016; 85:1893-1899. [PMID: 27510361 DOI: 10.1016/j.ejrad.2016.07.017] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Revised: 07/21/2016] [Accepted: 07/24/2016] [Indexed: 10/21/2022]
Abstract
Non-invasive cardiac imaging has rapidly evolved during the last decade due to advancements in CT based technologies. Coronary CT angiography has been shown to reliably assess coronary anatomy and detect high risk coronary artery disease. However, this technique is limited to anatomical assessment, thus non-invasive techniques for functional assessment of the heart are necessary. CT myocardial perfusion is a new CT based technique that provides functional assessment of the myocardium and allows for a comprehensive assessment of coronary artery disease with a single modality when combined with CTA. This review aims to discuss dynamic CT myocardial perfusion as a new technique in the assessment of CAD.
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Affiliation(s)
- Damiano Caruso
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Charleston, SC, United States; Department of Radiological Sciences, Oncological and Pathological Sciences, University of Rome "Sapienza", Latina, Italy
| | - Marwen Eid
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Charleston, SC, United States
| | - U Joseph Schoepf
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Charleston, SC, United States; Division of Cardiology, Department of Medicine, Medical University of South Carolina, Charleston, SC, United States.
| | - Kwang Nam Jin
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Charleston, SC, United States; Department of Radiology, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, Seoul, Republic of Korea
| | - Akos Varga-Szemes
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Charleston, SC, United States
| | - Christian Tesche
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Charleston, SC, United States; Department of Cardiology and Intensive Care Medicine, Heart Center Munich-Bogenhausen, Munich, Germany
| | - Stefanie Mangold
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Charleston, SC, United States; Department of Diagnostic and Interventional Radiology, University Hospital of Tuebingen, Tuebingen, Germany
| | - Adam Spandorfer
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Charleston, SC, United States
| | - Andrea Laghi
- Department of Radiological Sciences, Oncological and Pathological Sciences, University of Rome "Sapienza", Latina, Italy
| | - Carlo N De Cecco
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Charleston, SC, United States
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Batchelor D, Aygül U, Dettinger U, Ivanovic M, Tournebize A, Mangold S, Forster M, Scherf U, Peisert H, Chassé T. Insight into the orientation of LBG polymer films by XANES experiment and calculation. Eur Polym J 2016. [DOI: 10.1016/j.eurpolymj.2016.04.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Zimina A, Dardenne K, Denecke MA, Grunwaldt JD, Huttel E, Lichtenberg H, Mangold S, Pruessmann T, Rothe J, Steininger R, Vitova T. The CAT-ACT Beamline at ANKA: A new high energy X-ray spectroscopy facility for CATalysis and ACTinide research. ACTA ACUST UNITED AC 2016. [DOI: 10.1088/1742-6596/712/1/012019] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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17
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Mangold S. Funktionsdiagnostik und Auswertungsstrategien. ROFO-FORTSCHR RONTG 2016. [DOI: 10.1055/s-0036-1581351] [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: 10/22/2022]
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18
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Tesche C, De Cecco CN, Caruso D, Baumann S, Renker M, Mangold S, Dyer KT, Varga-Szemes A, Baquet M, Jochheim D, Ebersberger U, Bayer RR, Hoffmann E, Steinberg DH, Schoepf UJ. Coronary CT angiography derived morphological and functional quantitative plaque markers correlated with invasive fractional flow reserve for detecting hemodynamically significant stenosis. J Cardiovasc Comput Tomogr 2016; 10:199-206. [PMID: 26993434 DOI: 10.1016/j.jcct.2016.03.002] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2016] [Revised: 02/26/2016] [Accepted: 03/05/2016] [Indexed: 12/15/2022]
Abstract
OBJECTIVE Compare morphological and functional coronary plaque markers derived from coronary CT angiography (CCTA) for their ability to detect lesion-specific ischemia. MATERIALS AND METHODS Data of patients who had undergone both dual-source CCTA and invasive fractional flow reserve (FFR) measurement within 3 months were retrospectively analyzed. Various quantitative stenosis markers were derived from CCTA: Corrected coronary opacification (CCO), transluminal attenuation gradient (TAG), remodeling index (RI), computational FFR (cFFR), lesion length (LL), vessel volume (VV), total plaque volume (TPV), and calcified and non-calcified plaque volume (CPV and NCPV). Discriminatory power of these markers for flow-limiting versus non-significant coronary stenosis was assessed against invasive FFR as the reference standard. RESULTS The cohort included 37 patients (61 ± 12 years, 68% male). Among 37 lesions, 11 were hemodynamically significant by FFR. On a per-lesion level, sensitivity and specificity of TPV, CPV, and NCPV for hemodynamically significant stenosis detection were 88% and 74%, 67% and 53%, and 92% and 81%, respectively. For CCO, TAG, RI, and cFFR these were 64% and 86%, 35% and 56%, 82% and 54%, and 100% and 90%, respectively. At ROC analysis, only TPV (0.78, p = 0.013), NCPV (0.79, p = 0.009), cFFR (0.85, p = 0.003), and CCO (0.82, p = 0.0003) showed discriminatory power for detecting hemodynamically significant stenosis. CONCLUSION TPV, NCPV, CCO, and cFFR derived from CCTA can aid detecting hemodynamically significant coronary lesions with cFFR showing the greatest discriminatory ability.
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Affiliation(s)
- Christian Tesche
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Charleston, SC, USA; Department of Cardiology and Intensive Care Medicine, Heart Center Munich-Bogenhausen, Munich, Germany
| | - Carlo N De Cecco
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Charleston, SC, USA; Department of Radiological Sciences, Oncology and Pathology, University of Rome "Sapienza", Rome, Italy
| | - Damiano Caruso
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Charleston, SC, USA; Department of Radiological Sciences, Oncology and Pathology, University of Rome "Sapienza", Rome, Italy
| | - Stefan Baumann
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Charleston, SC, USA; First Department of Medicine, Faculty of Medicine Mannheim, University Medical Centre Mannheim (UMM), University of Heidelberg, Mannheim, Germany
| | - Matthias Renker
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Charleston, SC, USA; Department of Internal Medicine I, Cardiology/Angiology, Giessen University, Giessen, Germany
| | - Stefanie Mangold
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Charleston, SC, USA; Department of Diagnostic and Interventional Radiology, Eberhard-Karls University, Tuebingen, Tuebingen, Germany
| | - Kevin T Dyer
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Charleston, SC, USA
| | - Akos Varga-Szemes
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Charleston, SC, USA
| | - Moritz Baquet
- Department of Cardiology, Hospital of the Ludwig-Maximilians-University, Munich, Germany
| | - David Jochheim
- Department of Cardiology, Hospital of the Ludwig-Maximilians-University, Munich, Germany
| | - Ullrich Ebersberger
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Charleston, SC, USA; Department of Cardiology and Intensive Care Medicine, Heart Center Munich-Bogenhausen, Munich, Germany
| | - Richard R Bayer
- Division of Cardiology, Department of Medicine, Medical University of South Carolina, Charleston, SC, USA
| | - Ellen Hoffmann
- Department of Cardiology and Intensive Care Medicine, Heart Center Munich-Bogenhausen, Munich, Germany
| | - Daniel H Steinberg
- Division of Cardiology, Department of Medicine, Medical University of South Carolina, Charleston, SC, USA
| | - U Joseph Schoepf
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Charleston, SC, USA; Division of Cardiology, Department of Medicine, Medical University of South Carolina, Charleston, SC, USA.
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Mangold S, De Cecco CN, Schoepf UJ, Yamada RT, Varga-Szemes A, Stubenrauch AC, Caruso D, Fuller SR, Vogl TJ, Nikolaou K, Todoran TM, Wichmann JL. A noise-optimized virtual monochromatic reconstruction algorithm improves stent visualization and diagnostic accuracy for detection of in-stent re-stenosis in lower extremity run-off CT angiography. Eur Radiol 2016; 26:4380-4389. [DOI: 10.1007/s00330-016-4304-8] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2015] [Revised: 12/14/2015] [Accepted: 02/23/2016] [Indexed: 11/30/2022]
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Eid M, De Cecco CN, Schoepf UJ, Mangold S, Tesche C, Varga-Szemes A, Suranyi P, Stalcup S, Ball BD, Caruso D. The Role of MRI and CT in the Diagnosis of Atherosclerosis in an Aging Population. Curr Radiol Rep 2016. [DOI: 10.1007/s40134-016-0141-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Varga-Szemes A, Muscogiuri G, Wichmann JL, Cannao PM, Mangold S, Suranyi P, Litwin SE, De Cecco CN, Fuller SR, Giri S, Schoepf UJ, Todoran TM. Accuracy of Non-contrast-enhanced Quiescent Interval Single-Shot (QISS) Lower Extremity MRA for the Diagnosis of Peripheral Artery Disease: Comparison with CTA and Digital Subtraction Angiography. J Cardiovasc Magn Reson 2016. [PMCID: PMC5032228 DOI: 10.1186/1532-429x-18-s1-p225] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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22
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Varga-Szemes A, Muscogiuri G, Rehwald WG, Schoepf UJ, Litwin SE, De Cecco CN, Wichmann JL, Mangold S, Caruso D, Fuller SR, Suranyi P. Accuracy of a prototype dark blood late gadolinium enhancement technique for the detection and quantification of myocardial infarction. J Cardiovasc Magn Reson 2016. [PMCID: PMC5032723 DOI: 10.1186/1532-429x-18-s1-q65] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
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Caruso D, Rosenberg RD, De Cecco CN, Mangold S, Wichmann JL, Varga-Szemes A, Steinberg DH, Laghi A, Schoepf UJ. Vascular Imaging Before Transcatheter Aortic Valve Replacement (TAVR): Why and How? Curr Cardiol Rep 2016; 18:14. [DOI: 10.1007/s11886-015-0694-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Köppel G, Preidel V, Mangold S, Rudigier-Voigt E, Hývl M, Fejfar A, Rech B, Becker C. Nanoimprint-textured Glass Superstrates for Light Trapping in Crystalline Silicon thin-film Solar Cells. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.egypro.2015.12.304] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Tepluchin M, Kureti S, Casapu M, Ogel E, Mangold S, Grunwaldt JD. Study on the hydrothermal and SO2 stability of Al2O3-supported manganese and iron oxide catalysts for lean CO oxidation. Catal Today 2015. [DOI: 10.1016/j.cattod.2015.01.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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26
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Varga-Szemes A, Muscogiuri G, Schoepf UJ, De Cecco CN, Wichmann JL, Mangold S, Caruso D, Fuller SR, Spottiswoode BS, van der Geest RJ, Suranyi P. Overview of Myocardial T1 Mapping Applications. Curr Radiol Rep 2015. [DOI: 10.1007/s40134-015-0114-z] [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: 11/24/2022]
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Varga-Szemes A, Muscogiuri G, Schoepf UJ, Wichmann JL, Suranyi P, De Cecco CN, Cannaò PM, Renker M, Mangold S, Fox MA, Ruzsics B. Clinical feasibility of a myocardial signal intensity threshold-based semi-automated cardiac magnetic resonance segmentation method. Eur Radiol 2015; 26:1503-11. [PMID: 26267520 DOI: 10.1007/s00330-015-3952-4] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Revised: 07/15/2015] [Accepted: 07/28/2015] [Indexed: 11/29/2022]
Abstract
OBJECTIVES To assess the accuracy and efficiency of a threshold-based, semi-automated cardiac MRI segmentation algorithm in comparison with conventional contour-based segmentation and aortic flow measurements. METHODS Short-axis cine images of 148 patients (55 ± 18 years, 81 men) were used to evaluate left ventricular (LV) volumes and mass (LVM) using conventional and threshold-based segmentations. Phase-contrast images were used to independently measure stroke volume (SV). LV parameters were evaluated by two independent readers. RESULTS Evaluation times using the conventional and threshold-based methods were 8.4 ± 1.9 and 4.2 ± 1.3 min, respectively (P < 0.0001). LV parameters measured by the conventional and threshold-based methods, respectively, were end-diastolic volume (EDV) 146 ± 59 and 134 ± 53 ml; end-systolic volume (ESV) 64 ± 47 and 59 ± 46 ml; SV 82 ± 29 and 74 ± 28 ml (flow-based 74 ± 30 ml); ejection fraction (EF) 59 ± 16 and 58 ± 17%; and LVM 141 ± 55 and 159 ± 58 g. Significant differences between the conventional and threshold-based methods were observed in EDV, ESV, and LVM mesurements; SV from threshold-based and flow-based measurements were in agreement (P > 0.05) but were significantly different from conventional analysis (P < 0.05). Excellent inter-observer agreement was observed. CONCLUSIONS Threshold-based LV segmentation provides improved accuracy and faster assessment compared to conventional contour-based methods. KEY POINTS • Threshold-based left ventricular segmentation provides time-efficient assessment of left ventricular parameters • The threshold-based method can discriminate between blood and papillary muscles • This method provides improved accuracy compared to aortic flow measurements as a reference.
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Affiliation(s)
- Akos Varga-Szemes
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Ashley River Tower, 25 Courtenay Drive, Charleston, SC, 29425-2260, USA
| | - Giuseppe Muscogiuri
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Ashley River Tower, 25 Courtenay Drive, Charleston, SC, 29425-2260, USA.,Department of Medical-Surgical Sciences and Translational Medicine, University of Rome "Sapienza", Rome, Italy
| | - U Joseph Schoepf
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Ashley River Tower, 25 Courtenay Drive, Charleston, SC, 29425-2260, USA.
| | - Julian L Wichmann
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Ashley River Tower, 25 Courtenay Drive, Charleston, SC, 29425-2260, USA.,Department of Diagnostic and Interventional Radiology, University Hospital Frankfurt, Frankfurt, Germany
| | - Pal Suranyi
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Ashley River Tower, 25 Courtenay Drive, Charleston, SC, 29425-2260, USA
| | - Carlo N De Cecco
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Ashley River Tower, 25 Courtenay Drive, Charleston, SC, 29425-2260, USA
| | - Paola M Cannaò
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Ashley River Tower, 25 Courtenay Drive, Charleston, SC, 29425-2260, USA.,Scuola di Specializzazione in Radiodiagnostica, University of Milan, Milan, Italy
| | - Matthias Renker
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Ashley River Tower, 25 Courtenay Drive, Charleston, SC, 29425-2260, USA.,Kerckhoff Heart and Thorax Center, Bad Nauheim, Germany
| | - Stefanie Mangold
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Ashley River Tower, 25 Courtenay Drive, Charleston, SC, 29425-2260, USA.,Department of Diagnostic and Interventional Radiology, Eberhard-Karls University Tuebingen, Tuebingen, Germany
| | - Mary A Fox
- Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Ashley River Tower, 25 Courtenay Drive, Charleston, SC, 29425-2260, USA
| | - Balazs Ruzsics
- Department of Cardiology, Royal Liverpool and Broadgreen University Hospitals, Liverpool, UK
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Klumpp B, Bretschneider C, Krumm P, Mangold S, Gawaz M, Nikolaou K, Kramer U. Klinisch stumme Myokardinfarkte in der MRT bei Patienten mit Koronarer Herzerkrankung. ROFO-FORTSCHR RONTG 2015. [DOI: 10.1055/s-0035-1551003] [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: 10/23/2022]
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Bongers M, Schabel C, Homann G, Mangold S, Tsiflikas I, Ketelsen D, Nikolaou K, Thomas C. Das Potential von Gadolinium als Kontrastmittel in der Dual-Energy Computertomografie – eine ex vivo Phantom-Studie. ROFO-FORTSCHR RONTG 2015. [DOI: 10.1055/s-0035-1550858] [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: 10/23/2022]
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Mangold S. Untersuchungsprotokolle und Bildanalyse. ROFO-FORTSCHR RONTG 2015. [DOI: 10.1055/s-0035-1550985] [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: 10/23/2022]
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Mangold S. Funktionsdiagnostik und Auswertungsstrategien. ROFO-FORTSCHR RONTG 2015. [DOI: 10.1055/s-0035-1550939] [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: 10/23/2022]
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Zitzelsberger T, Kramer U, Bamberg F, Hornung A, Nikolaou K, Ruff C, Krumm P, Klumpp B, Mangold S, Bretschneider C, Sieverding L. Kardiale Real-time Magnetresonanztomografie zur Beurteilung der Ventrikelvolumina und Funktion bei pädiatrischen Patienten mit angeborenem Herzfehler: Technische Machbarkeit. ROFO-FORTSCHR RONTG 2015. [DOI: 10.1055/s-0035-1550958] [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: 10/23/2022]
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Tsiflikas I, Thomas C, Fallmann C, Schabel C, Mangold S, Ketelsen D, Claussen C, Axmann D, Schroeder S, Burgstahler C. Prevalence of Subclinical Coronary Artery Disease in Middle-Aged, Male Marathon Runners Detected by Cardiac CT. ROFO-FORTSCHR RONTG 2015; 187:561-8. [DOI: 10.1055/s-0034-1399221] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- I. Tsiflikas
- Diagnostic and Interventional Radiology, University Hospital of Tuebingen, Germany
| | - C. Thomas
- Diagnostic and Interventional Radiology, University Hospital of Tuebingen, Germany
| | - C. Fallmann
- Sports Medicine, University Hospital of Tuebingen, Germany
| | - C. Schabel
- Diagnostic and Interventional Radiology, University Hospital of Tuebingen, Germany
| | - S. Mangold
- Diagnostic and Interventional Radiology, University Hospital of Tuebingen, Germany
| | - D. Ketelsen
- Diagnostic and Interventional Radiology, University Hospital of Tuebingen, Germany
| | - C. Claussen
- Diagnostic and Interventional Radiology, University Hospital of Tuebingen, Germany
| | - D. Axmann
- Center of Dentistry Oral Medicine and Maxillofacial Surgery, University Hospital of Tuebingen, Germany
| | - S. Schroeder
- Internal Medicine, Klinikum am Eichert, Goeppingen, Germany
| | - C. Burgstahler
- Center of Dentistry Oral Medicine and Maxillofacial Surgery, University Hospital of Tuebingen, Germany
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Bongers MN, Schabel C, Krauss B, Tsiflikas I, Ketelsen D, Mangold S, Claussen CD, Nikolaou K, Thomas C. Noise-optimized virtual monoenergetic images and iodine maps for the detection of venous thrombosis in second-generation dual-energy CT (DECT): an ex vivo phantom study. Eur Radiol 2014; 25:1655-64. [PMID: 25528670 DOI: 10.1007/s00330-014-3544-8] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2014] [Revised: 10/15/2014] [Accepted: 11/25/2014] [Indexed: 12/25/2022]
Abstract
AIMS AND OBJECTIVES Deep venous thrombosis (DVT) can be difficult to detect using CT due to poor and heterogeneous contrast. Dual-energy CT (DECT) allows iodine contrast optimization using noise-optimized monoenergetic extrapolations (MEIs) and iodine maps (IMs). Our aim was to assess whether MEI and IM could improve the delineation of thrombotic material within iodine-enhanced blood compared to single-energy CT (SECT). MATERIALS AND METHODS Six vessel phantoms, including human thrombus and contrast media-enhanced blood and one phantom without contrast, were placed in an attenuation phantom and scanned with DECT 100/140 kV and SECT 120 kV. IM, virtual non-contrast images (VNC), mixed images, and MEI were calculated. Attenuation of thrombi and blood were measured. Contrast and contrast-to-noise-ratios (CNRs) were calculated and compared among IM, VNC, mixed images, MEI, and SECT using paired t tests. RESULTS MEI40keV and IM showed significantly higher contrast and CNR than SE120kV from high to intermediate iodine concentrations (contrast:pMEI40keV < 0.002,pIM < 0.005;CNR:pMEI40keV < 0.002,pIM < 0.004). At low iodine concentrations, MEI190keV and VNC images showed significantly higher contrast and CNR than SE120kV with inverted contrasts (contrast:pMEI190keV < 0.008,pVNC < 0.002;CNR:pMEI190keV < 0.003,pVNC < 0.002). CONCLUSIONS Noise-optimized MEI and IM provide significantly higher contrast and CNR in the delineation of thrombosis compared to SECT, which may facilitate the detection of DVT in difficult cases. KEY POINTS • Poor contrast makes it difficult to detect thrombosis in CT. • Dual-energy-CT allows contrast optimization using monoenergetic extrapolations (MEI) and iodine maps (IM). • Noise-optimized-MEI and IM are significantly superior to single-energy-CT in delineation of thrombosis. • Noise-optimized-MEI and IM may facilitate the detection of deep vein thrombosis.
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Affiliation(s)
- Malte N Bongers
- Department of Diagnostic and Interventional Radiology, University Hospital of Tübingen, Hoppe-Seyler-Strasse 3, 72076, Tübingen, Germany
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Mangold S, Gatidis S, Schabel C, Bongers M, Luz O, Claussen CD, Thomas C. Monoenergetische Bildgebung mittels Single-Source Dual Energy CT: Einsatz zur Reduktion von Metallartefakten. ROFO-FORTSCHR RONTG 2014. [DOI: 10.1055/s-0034-1372739] [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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Schabel C, Bongers M, Mangold S, Grosse U, Schick F, Claussen C, Thomas C. Voll integrierte CT Detektortechnologie: Evaluation des Dosiseinsparpotentials. ROFO-FORTSCHR RONTG 2014. [DOI: 10.1055/s-0034-1372721] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [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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Krumm P, Martirosian P, Zitzelsberger T, Mangold S, Bretschneider C, Klumpp BD, Claussen CD, Schick F, Kramer U. Multi Echo Turbospinecho T2 mapping in der kardialen MRT zum Ödemnachweis bei Myokardinfarkt. ROFO-FORTSCHR RONTG 2014. [DOI: 10.1055/s-0034-1373579] [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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Schabel C, Bongers M, Sedlmair M, Korn A, Grosse U, Mangold S, Claussen CD, Thomas C. Assessment of the hepatic veins in poor contrast conditions using dual energy CT: evaluation of a novel monoenergetic extrapolation software algorithm. ROFO-FORTSCHR RONTG 2014; 186:591-7. [PMID: 24756426 DOI: 10.1055/s-0034-1366423] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [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 To evaluate a novel monoenergetic post-processing algorithm (MEI+) in patients with poor intrahepatic contrast enhancement. MATERIALS AND METHODS 25 patients were retrospectively included in this study. Late-phase imaging of the upper abdomen, which was acquired in dual-energy mode (100/140 kV), was used as a model for poor intrahepatic contrast enhancement. Traditional monoenergetic images (MEI), linearly weighted mixed images with different mixing ratios (MI), sole 100 and 140 kV and MEI+ images were calculated. MEI+ is a novel technique which applies frequency-based mixing of the low keV images and an image of optimal keV from a noise perspective to combine the benefits of both image stacks. The signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) of the intrahepatic vasculature (IHV) and liver parenchyma (LP) were objectively measured and depiction of IHV was subjectively rated and correlated with portal venous imaging by two readers in consensus. RESULTS MEI+ was able to increase the SNR of the IHV (5.7 ± 0.4 at 40keV) and LP (4.9 ± 1.0 at 90keV) and CNR (2.1 ± 0.6 at 40keV) greatly compared to MEI (5.1 ± 1.1 at 80keV, 4.7 ± 1.0 at 80keV, 1.0 ± 0.4 at 70keV), MI (5.2 ± 1.1 M5:5, 4.8 ± 1.0 M5:5, 1.0 ± 3.5 M9:1), sole 100 kV images (4.4 ± 1.0, 3.7 ± 0.8, 1.0 ± 0.3) and 140 kV images (2.8 ± 0.5, 3.1 ± 0.6, 0.1 ± 0.2). Subjective assessment rated MEI+ of virtual 40 keV superior to all other images. CONCLUSION MEI+ is a very promising algorithm for monoenergetic extrapolation which is able to overcome noise limitations associated with traditional monoenergetic techniques at low virtual keV levels and consequently does not suffer from a decline of SNR and CNR at low keV values. This algorithm allows an improvement of IHV depiction in the presence of poor contrast. KEY POINTS • The evaluated new image-based algorithm for virtual monoenergetic imaging allows calculating low virtual keV images from dual energy datasets with significantly improved contrast-to-noise ratios. • The image based novel monoenergetic extrapolation algorithm applies frequency-based mixing of the low keV images and an image of optimal keV from a noise perspective to combine the benefits of both image stacks.• When compared to traditional monoenergetic images, the novel monoenergetic algorithm has improved contrast-to-noise ratios for both low and high virtual keV images.• Contrast-enhanced dual energy images with poor contrast conditions can be significantly improved, e.g. late phase imaging of the liver.
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Affiliation(s)
- C Schabel
- Department of Diagnostic and Interventional Radiology, University Hospital of Tuebingen
| | - M Bongers
- Department of Diagnostic and Interventional Radiology, University Hospital of Tuebingen
| | | | - A Korn
- Department of Diagnostic and Interventional Neuroradiology, University Hospital of Tuebingen
| | - U Grosse
- Department of Diagnostic and Interventional Radiology, University Hospital of Tuebingen
| | - S Mangold
- Department of Diagnostic and Interventional Radiology, University Hospital of Tuebingen
| | - C D Claussen
- Department of Diagnostic and Interventional Radiology, University Hospital of Tuebingen
| | - C Thomas
- Department of Diagnostic and Interventional Radiology, University Hospital of Tuebingen
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Tsiflikas I, Thomas C, Schabel C, Fallmann C, Ketelsen D, Mangold S, Claussen CD, Burgstahler C. Prävalenz subklinischer Koronarer Herzkrankheit bei asymptomatischen Marathonläufern: Detektion mittels koronarer CT-Angiografie. ROFO-FORTSCHR RONTG 2014. [DOI: 10.1055/s-0034-1372895] [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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Kramer U, May AE, Mangold S, Krumm P, Claussen CD. [Cardiac magnetic resonance tomography in the diagnostics of restrictive and unclassified cardiopathies]. Radiologe 2013; 53:45-53. [PMID: 23160570 DOI: 10.1007/s00117-012-2384-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
CLINICAL/METHODICAL ISSUE Besides ischemic heart disease cardiomyopathies are common causes of heart failure and sudden cardiac death. STANDARD RADIOLOGICAL METHODS The diagnostic spectrum in cardiomyopathies comprises non-invasive and invasive examination techniques. METHODICAL INNOVATIONS The exact verification of certain cardiomyopathies necessitates knowledge of the latest classification of cardiomyopathies as well as dedicated examination protocols. PERFORMANCE Modern imaging modalities, such as echocardiography and cardiac magnetic resonance imaging (MRI) have emerged as useful imaging tools in the investigation of patients suspected of having many different types of cardiomyopathies. ACHIEVEMENTS Based on a better understanding of the underlying pathophysiology several diagnostic criteria have been defined using cardiac MRI. In particular there is an increasing importance of cardiac MRI in the description of patients with restrictive and unclassified cardiomyopathies. PRACTICAL RECOMMENDATIONS Echocardiography still remains the modality of choice in the diagnostics of unclear left ventricular heart failure. Further diagnostic work-up should include cardiac MRI in case of any lack of clarity.
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Affiliation(s)
- U Kramer
- Abteilung für Diagnostische und Interventionelle Radiologie, Radiologische Klinik, Universität Tübingen, Deutschland.
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Mangold S, Kramer U, Franzen E, Erz G, Bretschneider C, Seeger A, Claussen CD, Niess AM, Burgstahler C. Detection of cardiovascular disease in elite athletes using cardiac magnetic resonance imaging. ROFO-FORTSCHR RONTG 2013; 185:1167-74. [PMID: 23897528 DOI: 10.1055/s-0033-1350130] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
PURPOSE Sudden cardiac death [SCD] in competitive athletes is caused by a diverse set of cardiovascular diseases such as hypertrophic and dilated cardiomyopathy [HCM/DCM], myocarditis, coronary anomalies or even coronary artery disease. In order to identify potential risk factors responsible for SCD, elite athletes underwent cardiac magnetic resonance [CMR] imaging. MATERIALS AND METHODS 73 male [M] and 22 female [F] athletes (mean age 35.2 ± 11.4 years) underwent CMR imaging. ECG-gated breath-hold cine SSFP sequences were used for the evaluation of wall motion abnormalities and myocardial hypertrophy as well as for quantitative analysis (left and right ventricular [LV, RV] end-diastolic and end-systolic volume [EDV, ESV], stroke volume [SV], ejection fraction [EF] and myocardial mass [MM]). Furthermore, left and right atrial sizes were assessed by planimetry and delayed enhancement imaging was performed 10 minutes after the application of contrast agent. Coronary arteries were depicted using free-breathing Flash-3 D MR angiography. RESULTS The quantitative analyses showed eccentric hypertrophy of the left ventricle (remodeling index [MM/LV-EDV]: M 0.75, F 0.665), enlargement of the RV volumes (RV-EDV: M 122.6 ± 19.0 ml/m², F 99.9 ± 7.2 ml/m²) and an increased SV (LV-SV: M 64.7 ± 10.0 ml/m², F 56.5 ± 5.7 ml/m²; RV-SV; M 66.7 ± 10.4 ml/m², F 54.2 ± 7.1 ml/m²). Abnormal findings were detected in 6 athletes (6.3 %) including one benign variant of coronary anomaly and abnormal late gadolinium enhancement in 2 cases. None of the athletes showed wall motion abnormalities or signs of myocardial ischemia. CONCLUSION CMR imaging of endurance athletes revealed abnormal findings in more than 5 % of the athletes. However, the prognostic significance remains unclear. Thus, cardiac MRI cannot be recommended as a routine examination in the care of athletes.
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Affiliation(s)
- S Mangold
- Department of Diagnostic and Interventional Radiology, University of Tuebingen
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Krumm P, Zürn CS, Wurster TH, Seeger A, Mangold S, Bretschneider C, Klumpp B, May AE, Claussen CD, Kramer U. Prä- und postinterventionelle Analyse des Myokardialen Strains mittels KardioMRT bei Patienten mit Mitralklappen-Clipping. ROFO-FORTSCHR RONTG 2013. [DOI: 10.1055/s-0033-1346296] [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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Mangold S. Funktionsdiagnostik & Auswertungsstrategien. ROFO-FORTSCHR RONTG 2013. [DOI: 10.1055/s-0033-1346056] [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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Kaempf M, Ketelsen D, Syha R, Sixt S, Mangold S, Thomas C, Claussen CD, Heuschmid M, Brechtel K. CT angiography of various superficial femoral artery stents: An in vitro phantom study. Eur J Radiol 2012; 81:1584-8. [PMID: 21546182 DOI: 10.1016/j.ejrad.2011.04.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2011] [Accepted: 04/06/2011] [Indexed: 11/16/2022]
Affiliation(s)
- Michael Kaempf
- Department of Diagnostic and Interventional Radiology, Eberhard-Karls-University, Hoppe-Seyler-Str. 3, 72076 Tübingen, Germany
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Mangold S, Thomas C, Fenchel M, Vuust M, Krauss B, Ketelsen D, Tsiflikas I, Claussen CD, Heuschmid M. Virtual Nonenhanced Dual-Energy CT Urography with Tin-Filter Technology: Determinants of Detection of Urinary Calculi in the Renal Collecting System. Radiology 2012; 264:119-25. [PMID: 22570506 DOI: 10.1148/radiol.12110851] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Stefanie Mangold
- Department of Diagnostic and Interventional Radiology, Eberhard-Karls-University Tuebingen, Hoppe-Seyler-Str. 3, 72076 Tuebingen, Germany
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Erz G, Mangold S, Franzen E, Claussen CD, Niess AM, Burgstahler C, Kramer U. Correlation between ECG abnormalities and cardiac parameters in highly trained asymptomatic male endurance athletes: evaluation using cardiac magnetic resonance imaging. Int J Cardiovasc Imaging 2012; 29:325-34. [DOI: 10.1007/s10554-012-0082-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2012] [Accepted: 06/08/2012] [Indexed: 01/23/2023]
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Mangold S. Funktionsdiagnostik & Auswertungsstrategien. ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0032-1310857] [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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Seeger A, Mangold S, Bretschneider C, Krumm P, Klumpp B, Claussen CD, Kramer U. Extrakranielle Anwendungen der zeitlich hochaufgelösten MR-Angiographie. ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0032-1311483] [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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Seeger A, Dörnberger V, Krumm P, Mangold S, Bretschneider C, Gawaz M, Claussen CD, Miller S, Kramer U. Darstellung von SM- und ICD-Sondenplatzierungen. ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0031-1300861] [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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Mangold S, Bretschneider C, Seeger A, Fenchel M, Klumpp B, Krumm P, Claussen CD, Kramer U. Kardiale MRT zur Risikostratifizierung bei Leistungssportlern im Hinblick auf nicht-ischämische Kardiomyopathien. ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0031-1300874] [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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