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Narula J, Chandrashekhar Y, Ahmadi A, Abbara S, Berman DS, Blankstein R, Leipsic J, Newby D, Nicol ED, Nieman K, Shaw L, Villines TC, Williams M, Hecht HS. SCCT 2021 Expert Consensus Document on Coronary Computed Tomographic Angiography: A Report of the Society of Cardiovascular Computed Tomography. J Cardiovasc Comput Tomogr 2021; 15:192-217. [PMID: 33303384 PMCID: PMC8713482 DOI: 10.1016/j.jcct.2020.11.001] [Citation(s) in RCA: 141] [Impact Index Per Article: 47.0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Jagat Narula
- Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Y Chandrashekhar
- University of Minnesota and VA Medical Center, Minneapolis, MN, USA
| | - Amir Ahmadi
- Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Suhny Abbara
- University of Texas Southwestern Medical Center, Dallas, TX, USA
| | | | - Ron Blankstein
- Harvard Medical School, Brigham and Women's Hospital, Boston, MA, USA
| | | | - David Newby
- University of Edinburgh/British Heart Foundation Centre for Cardiovascular Science, Edinburgh, United Kingdom
| | - Edward D Nicol
- National Heart and Lung Institute, Imperial College, London, United Kingdom
| | | | - Leslee Shaw
- New York-Presbyterian Hospital and Weill Cornell Medicine, New York, NY, USA
| | - Todd C Villines
- University of Virginia Health System, Charlottesville, VA, USA
| | - Michelle Williams
- University of Edinburgh/British Heart Foundation Centre for Cardiovascular Science, Edinburgh, United Kingdom
| | - Harvey S Hecht
- Icahn School of Medicine at Mount Sinai, New York, NY, USA.
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Berecova Z, Juskanic D, Simkova J, Simkova I. Dual-energy Computed Tomography Delayed Myocardial Enhancement in the Diagnostic Dilemma of True versus False Left Ventricular Aneurysm - A Case Report. J Clin Imaging Sci 2021; 11:20. [PMID: 33948336 PMCID: PMC8088475 DOI: 10.25259/jcis_28_2021] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Accepted: 03/24/2021] [Indexed: 12/16/2022] Open
Abstract
The aim of this case report is to show the capability of cardiac computed tomography (CT) in combination with dual-energy CT (DECT) delayed myocardial enhancement to support diagnostic decision making in the complicated differential diagnosis of true versus false left ventricle (LV) aneurysm, as well as provide additional information that can influence overall patient outcome. We present a 71-year-old obese patient with metabolic syndrome, stable chronic coronary syndrome with three-vessel disease, and recent chest discomfort. His coronary angiogram showed no significant coronary artery stenosis, but suspicion of LV apical pseudoaneurysm was expressed. Neither transthoracic nor transesophageal echocardiography was able to dismiss this suspicion. Consequently, coronary CT angiography (CCTA) followed by DECT delayed myocardial enhancement was performed. Findings on CCTA and DECT confirmed the diagnosis of a true aneurysm. Moreover, fibrotic changes within the hypertrophic myocardium were visualized. This finding will influence further patient therapy as well as the outcome. DECT delayed myocardial enhancement can be an important complementary tool for distinguishing true versus false LV aneurysms. Moreover, it can provide additional information for making complex diagnose. Adding DECT delayed myocardial enhancement to CCTA can replace cardiac magnetic resonance imaging evaluation in certain settings.
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Affiliation(s)
- Zuzana Berecova
- Radiodiagnostic Clinic, University Hospital - Slovak Medical University and St. Michal Hospital, Bratislava, Slovakia, Europe
| | | | - Jana Simkova
- Institute of Diagnostic Imaging, Trnava, , Slovakia, Europe
| | - Iveta Simkova
- Department of Cardiology and Angiology, National Institute for Cardiovascular Diseases, Bratislava, Slovakia, Europe
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Rodriguez-Granillo GA, Cirio JJ, Ciardi C, Caballero ML, Diluca P, Castrillon R, Ceron M, Scrivano E, Lylyk P. Cardiovascular thrombotic complications in acute ischemic stroke assessed by chest spectral computed tomography during COVID-19. Minerva Cardiol Angiol 2021; 69:606-618. [PMID: 33703860 DOI: 10.23736/s2724-5683.21.05547-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
During the pandemic context, diagnostic algorithms had to be adapted considering the decimated medical personnel, local technical resources, and the likelihood of contamination. Given the higher probability of thrombotic complications related to COVID-19 and the availability of a dual-layer spectral computed tomography (CT) scanner, we have recently adopted the use of low-dose, non-gated, chest CT scans performed five minutes after contrast administration among patients admitted with acute ischemic stroke (AIS) undergoing cerebrovascular CT angiography. Dual-layer spectral CT comprises a single X-ray source and two-layer detector with different photon-absorption capabilities. In addition to conventional images, the two distinct energy datasets obtained enable multiparametric spectral analysis without need to change the original scanning protocol. The two spectral features that emerge as most useful for patients with AIS are virtual monoenergetic imaging and iodine-based results. Aside from the evaluation of lung parenchyma, this novel strategy enables ruling out cardioembolic sources and simultaneously providing evidence of pulmonary and myocardial injury in a single session and immediately after CT cerebrovascular angiography. Furthermore, it involves a non-invasive, seemingly accurate, unsophisticated, safer (very low radiation dose and no contrast administration), and cheaper tool for ruling out cardioembolic sources compared to transesophageal echocardiogram and cardiac CT. Accordingly, we sought to standardize the technical aspects and overview the usefulness of delayed-phase, low-dose chest spectral CT in patients admitted with AIS.
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Affiliation(s)
- Gaston A Rodriguez-Granillo
- Department of Cardiovascular Imaging, ENERI Medical Institute, La Sagrada Familia Clinic, Buenos Aires, Argentina - .,National Council of Scientific and Technical Investigations - Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET), Buenos Aires, Argentina -
| | - Juan J Cirio
- Stroke Unit, ENERI Medical Institute, La Sagrada Familia Clinic, Buenos Aires, Argentina
| | - Celina Ciardi
- Stroke Unit, ENERI Medical Institute, La Sagrada Familia Clinic, Buenos Aires, Argentina
| | - Maria L Caballero
- Stroke Unit, ENERI Medical Institute, La Sagrada Familia Clinic, Buenos Aires, Argentina
| | - Pablo Diluca
- Department of Radiology, ENERI Medical Institute, La Sagrada Familia Clinic, Buenos Aires, Argentina
| | - Ricardo Castrillon
- Department of Radiology, ENERI Medical Institute, La Sagrada Familia Clinic, Buenos Aires, Argentina
| | - Marcos Ceron
- Department of Cardiovascular Imaging, ENERI Medical Institute, La Sagrada Familia Clinic, Buenos Aires, Argentina
| | - Esteban Scrivano
- Department of Interventional Radiology, ENERI Medical Institute, La Sagrada Familia Clinic, Buenos Aires, Argentina
| | - Pedro Lylyk
- Department of Interventional Radiology, ENERI Medical Institute, La Sagrada Familia Clinic, Buenos Aires, Argentina
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Utility of Iodine Density Perfusion Maps From Dual-Energy Spectral Detector CT in Evaluating Cardiothoracic Conditions: A Primer for the Radiologist. AJR Am J Roentgenol 2020; 214:775-785. [PMID: 32045305 DOI: 10.2214/ajr.19.21818] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
OBJECTIVE. The purpose of this article is to outline the utility of iodine density maps for evaluating cardiothoracic disease and abnormalities. Multiple studies have shown that the variety of images generated from dual-energy spectral detector CT (SDCT) improve identification of cardiothoracic conditions. CONCLUSION. Understanding the technique of SDCT and being familiar with the features of different cardiothoracic conditions on iodine density map images help the radiologist make a better diagnosis.
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Rodriguez-Granillo GA, Deviggiano A, Capunay C, De Zan M, Fernandez-Pereira C, Carrascosa P. Role of Iterative Reconstruction Algorithm for the Assessment of Myocardial Infarction with Dual Energy Computed Tomography. Acad Radiol 2019; 26:e260-e266. [PMID: 30442492 DOI: 10.1016/j.acra.2018.10.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2018] [Revised: 10/23/2018] [Accepted: 10/25/2018] [Indexed: 11/29/2022]
Abstract
RATIONALE AND OBJECTIVES Low monochromatic energy levels (40 keV) derived from delayed enhancement dual energy cardiac computed tomography (DE-DECT) allow the evaluation of myocardial infarcts (MI) among stable patients, although at the expense of high image noise. We explored whether the application of adaptive statistical iterative reconstruction (ASIR) to 40-keV DE-DECT (unavailable with previous software versions) might improve image quality and detection of MI in stable patients. MATERIALS AND METHODS We prospectively enrolled patients with a history of previous MI, and performed delayed-enhancement cardiac magnetic resonance (DE-CMR) and DE-DECT within the same week. DE-DECT images were reconstructed with 0% and 60% ASIR. RESULTS MI was identified in 18 (80%) patients with both DE-CMR and DE-DECT. On a per segment basis, we did not identify significant differences regarding the diagnostic performance of DE-DECT with and without ASIR [area under receiver operating characteristic curve 0.86 vs. 0.83, p = 0.10]. The application of ASIR improved the signal-to-noise ratio of DE-DECT with 0% ASIR compared to DE-DECT with 60% ASIR (6.07 ± 2.1 vs. 11.1 ± 4.5, p < 0.0001). However, qualitative assessment of MI image quality (3.35 ± 1.2, vs. 3.55 ± 1.1, p = 0.10) and diagnostic confidence (4.40 ± 0.9 vs. 4.60 ± 0.8, p = 0.10) were not significantly improved. Using DE-DECT with 60% ASIR, a threshold over 199 HU showed a sensitivity of 67% and a specificity of 92% for the detection of segments with MI. CONCLUSION In this study, DE-DECT allowed accurate detection of MI among stable patients compared with DE-CMR, and the application of ASIR improved signal-to-noise ratio of DE-DECT, although the diagnostic performance showed only non-significant improvements.
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Affiliation(s)
- Gaston A Rodriguez-Granillo
- Department of Cardiovascular Imaging, Diagnóstico Maipú, Av Maipú 1668, Vicente López (B1602ABQ) Buenos Aires, Argentina.
| | - Alejandro Deviggiano
- Department of Cardiovascular Imaging, Diagnóstico Maipú, Av Maipú 1668, Vicente López (B1602ABQ) Buenos Aires, Argentina
| | - Carlos Capunay
- Department of Cardiovascular Imaging, Diagnóstico Maipú, Av Maipú 1668, Vicente López (B1602ABQ) Buenos Aires, Argentina
| | - Macarena De Zan
- Department of Cardiovascular Imaging, Diagnóstico Maipú, Av Maipú 1668, Vicente López (B1602ABQ) Buenos Aires, Argentina
| | | | - Patricia Carrascosa
- Department of Cardiovascular Imaging, Diagnóstico Maipú, Av Maipú 1668, Vicente López (B1602ABQ) Buenos Aires, Argentina
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Abstract
This article reviews the imaging manifestations of acute myocardial infarction (MI) on computed tomography (CT) accompanied by case examples and illustrations. This is preceded by a review of the pathophysiology of MI (acute and chronic), a summary of its clinical presentation, and a brief synopsis of the technical aspects of cardiac CT. Several examples of the appearance of acute MI and its complications are shown on routine and cardiac tailored CT, and a sample of the latest advances in imaging technique, including dual-energy CT, are introduced.
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Affiliation(s)
- Alastair Moore
- Department of Radiology, Cardiothoracic Imaging, UT Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390-8896, USA.
| | - Harold Goerne
- Department of Radiology, Cardiovascular Imaging Service, IMSS Western National Medical Center, Belisario Dominguez 1000, Guadalajara, Jalisco 44340, Mexico; Cardiovascular Imaging Service, Imaging and Diagnosis Center (CID), Av. Americas 2016, Guadalajara, Jalisco 44610, Mexico
| | - Prabhakar Rajiah
- Department of Radiology, Cardiothoracic Imaging, UT Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390-8896, USA
| | - Yuki Tanabe
- Department of Radiology, Cardiothoracic Imaging, UT Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390-8896, USA
| | - Sachin Saboo
- Department of Radiology, Cardiothoracic Imaging, UT Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390-8896, USA
| | - Suhny Abbara
- Department of Radiology, Cardiothoracic Imaging, UT Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390-8896, USA
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Non-contrast estimation of diffuse myocardial fibrosis with dual energy CT: A phantom study. J Cardiovasc Comput Tomogr 2017; 12:74-80. [PMID: 29242134 DOI: 10.1016/j.jcct.2017.12.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Accepted: 12/03/2017] [Indexed: 12/25/2022]
Abstract
BACKGROUND Estimation of diffuse myocardial fibrosis, substrate for adverse events such as heart failure and arrhythmias in patients with various cardiac disorders, is presently done by histopathology or cardiac magnetic resonance. We sought to develop a non-contrast method to estimate the amount of diffuse myocardial fibrosis leveraging dual energy computed tomography (DECT) in phantoms and a suitable small animal model. METHODS AND RESULTS Phantoms consisted of homogenized bovine myocardium with varying amounts of Type 1 collagen. Fifteen mice underwent sham surgery, no procedure, or transverse aortic constriction (TAC) for 5 or 8 weeks to produce moderate or severe fibrosis, respectively. Phantoms and ex vivo mouse hearts were imaged on a single source, DECT scanner equipped with kVp switching. Monochromatic images were reconstructed at 40-140 keV. Linear discriminant analysis (LDA) was performed on mean myocardial CT numbers derived from single energy (70 keV) images as well as images reconstructed across multiple energies. Classification of myocardial fibrosis severity as low, moderate or severe was more often correct using the multi-energy CT/LDA approach vs. single energy CT/LDA in both phantoms (80.0% vs. 70.0%) and mice (93.3% vs. 33.3%). CONCLUSIONS DECT myocardial imaging with multi-energy analysis better classifies myocardial fibrosis severity compared to a single energy-based approach. Non-contrast DECT can accurately and non-invasively estimate the extent of diffuse myocardial fibrosis in phantom and animal models. These data support further evaluation of this approach for in vivo myocardial fibrosis estimation.
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