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Ha S, Jung S, Park HB, Shin S, Arsanjani R, Hong Y, Lee BK, Jang Y, Jeon B, Park SI, Shim H, Chang HJ. Assessment of Image Quality for Selective Intracoronary Contrast-Injected CT Angiography in a Hybrid Angio-CT System: A Feasibility Study in Swine. Yonsei Med J 2021; 62:200-208. [PMID: 33635009 PMCID: PMC7934100 DOI: 10.3349/ymj.2021.62.3.200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 12/03/2020] [Accepted: 12/14/2020] [Indexed: 11/27/2022] Open
Abstract
PURPOSE To compare image quality in selective intracoronary contrast-injected computed tomography angiography (Selective-CTA) with that in conventional intravenous contrast-injected CTA (IV-CTA). MATERIALS AND METHODS Six pigs (35 to 40 kg) underwent both IV-CTA using an intravenous injection (60 mL) and Selective-CTA using an intracoronary injection (20 mL) through a guide-wire during/after percutaneous coronary intervention. Images of the common coronary artery were acquired. Scans were performed using a combined machine comprising an invasive coronary angiography suite and a 320-channel multi-slice CT scanner. Quantitative image quality parameters of CT attenuation, image noise, signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR), mean lumen diameter (MLD), and mean lumen area (MLA) were measured and compared. Qualitative analysis was performed using intraclass correlation coefficient (ICC), which was calculated for analysis of interobserver agreement. RESULTS Quantitative image quality, determined by assessing the uniformity of CT attenuation (399.06 vs. 330.21, p<0.001), image noise (24.93 vs. 18.43, p<0.001), SNR (16.43 vs. 18.52, p=0.005), and CNR (11.56 vs. 13.46, p=0.002), differed significantly between IV-CTA and Selective-CTA. MLD and MLA showed no significant difference overall (2.38 vs. 2.44, p=0.068, 4.72 vs. 4.95, p=0.078). The density of contrast agent was significantly lower for selective-CTA (13.13 mg/mL) than for IV-CTA (400 mg/mL). Agreement between observers was acceptable (ICC=0.79±0.08). CONCLUSION Our feasibility study in swine showed that compared to IV-CTA, Selective-CTA provides better image quality and requires less iodine contrast medium.
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Affiliation(s)
- Seongmin Ha
- Graduate School of Biomedical Engineering, Yonsei University College of Medicine, Seoul, Korea
- CONNECT-AI R&D Center, Yonsei University College of Medicine, Seoul, Korea
| | - Sunghee Jung
- CONNECT-AI R&D Center, Yonsei University College of Medicine, Seoul, Korea
- Brain Korea 21 PLUS Project for Medical Science, Yonsei University, Seoul, Korea
| | - Hyung Bok Park
- Division of Cardiology, Cardiovascular Center, Myongji Hospital, Seonam University College of Medicine, Goyang, Korea
| | - Sanghoon Shin
- Division of Cardiology, National Health Insurance Corporation Ilsan Hospital, Goyang, Korea
| | - Reza Arsanjani
- Cardiovascular Center, Mayo Clinic Scottsdale, Scottsdale, Arizona, USA
| | - Youngtaek Hong
- CONNECT-AI R&D Center, Yonsei University College of Medicine, Seoul, Korea
| | - Byoung Kwon Lee
- Division of Cardiology, Department of Internal Medicine, Heart Center, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Yeonggul Jang
- CONNECT-AI R&D Center, Yonsei University College of Medicine, Seoul, Korea
| | - Byunghwan Jeon
- CONNECT-AI R&D Center, Yonsei University College of Medicine, Seoul, Korea
| | - Se Il Park
- Cardiovascular Product Evaluation Center, Yonsei University College of Medicine, Seoul, Korea
| | - Hackjoon Shim
- Cardiovascular Research Institute, Yonsei University College of Medicine, Seoul, Korea
| | - Hyuk Jae Chang
- CONNECT-AI R&D Center, Yonsei University College of Medicine, Seoul, Korea
- Division of Cardiology, Severance Cardiovascular Hospital, Yonsei University Health System, Seoul, Korea.
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Vulnerable Plaques Producing an Acute Coronary Syndrome Exhibit a Different CT Phenotype than Those That Remain Silent. JOURNAL OF CARDIOVASCULAR EMERGENCIES 2020. [DOI: 10.2478/jce-2020-0008] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Abstract
Background: All plaques that trigger acute coronary syndromes (ACS) present various characteristics of vulnerability. However, not all vulnerable plaques (VP) lead to an ACS. This raises the question as to which of the established CT vulnerability features hold the highest probability of developing ACS.
Aim: To identify the distinct phenotype of VP that exposes the unstable atheromatous plaque to a higher risk of rupture.
Material and Methods: In total, 20 patients in whom cardiac computed tomographic angiography (CCTA) identified the presence of a vulnerable plaque and who developed an ACS within 6 months after CCTA examination were enrolled in the study, and compared to 20 age- and gender-matched subjects with VPs who did not develop an ACS. All included patients presented VPs at baseline, defined as the presence of minimum 50% degree of stenosis and at least one CT marker of vulnerability (low attenuation plaques [LAP], napkin-ring sign [NRS], positive remodeling [PR], spotty calcifications [SCs]).
Results: The two groups were not different in regards to age, gender, cardiovascular risk factors, and comorbidities. Patients who developed an ACS at six months presented higher volumes of lipid-rich (p = 0.01) and calcified plaques (p = 0.01), while subjects in the control group presented plaques with a larger fibrotic content (p = 0.0005). The most frequent vulnerability markers within VPs that had triggered ACS were LAPs (p <0.0001) and PR (p <0.0001). Multivariate analysis identified LAP as the strongest independent predictor of ACS at 6 months in our study population (OR 8.18 [1.23-95.08], p = 0.04).
Conclusions: VPs producing an ACS exhibit a different phenotype compared to VPs that remain silent. The CCTA profile of VPs producing an ACS includes the presence of low attenuation, positive remodeling, and lipid-rich atheroma. The presence of these features in VPs identifies very high-risk patients, who can benefit from adapted therapeutic strategies in order to prevent an ACS.
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From CT to artificial intelligence for complex assessment of plaque-associated risk. Int J Cardiovasc Imaging 2020; 36:2403-2427. [PMID: 32617720 DOI: 10.1007/s10554-020-01926-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2020] [Accepted: 06/25/2020] [Indexed: 02/07/2023]
Abstract
The recent technological developments in the field of cardiac imaging have established coronary computed tomography angiography (CCTA) as a first-line diagnostic tool in patients with suspected coronary artery disease (CAD). CCTA offers robust information on the overall coronary circulation and luminal stenosis, also providing the ability to assess the composition, morphology, and vulnerability of atherosclerotic plaques. In addition, the perivascular adipose tissue (PVAT) has recently emerged as a marker of increased cardiovascular risk. The addition of PVAT quantification to standard CCTA imaging may provide the ability to extract information on local inflammation, for an individualized approach in coronary risk stratification. The development of image post-processing tools over the past several years allowed CCTA to provide a significant amount of data that can be incorporated into machine learning (ML) applications. ML algorithms that use radiomic features extracted from CCTA are still at an early stage. However, the recent development of artificial intelligence will probably bring major changes in the way we integrate clinical, biological, and imaging information, for a complex risk stratification and individualized therapeutic decision making in patients with CAD. This review aims to present the current evidence on the complex role of CCTA in the detection and quantification of vulnerable plaques and the associated coronary inflammation, also describing the most recent developments in the radiomics-based machine learning approach for complex assessment of plaque-associated risk.
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Stepniak K, Ursani A, Paul N, Naguib H. Novel 3D printing technology for CT phantom coronary arteries with high geometrical accuracy for biomedical imaging applications. ACTA ACUST UNITED AC 2020. [DOI: 10.1016/j.bprint.2020.e00074] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Matsumoto H, Watanabe S, Kyo E, Tsuji T, Ando Y, Eisenberg E, Otaki Y, Manabe O, Cadet S, Slomka PJ, Tamarappoo BK, Berman DS, Dey D. Improved Evaluation of Lipid-Rich Plaque at Coronary CT Angiography: Head-to-Head Comparison with Intravascular US. Radiol Cardiothorac Imaging 2019; 1:e190069. [PMID: 32076671 DOI: 10.1148/ryct.2019190069] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Revised: 08/23/2019] [Accepted: 09/04/2019] [Indexed: 01/01/2023]
Abstract
Purpose To improve the evaluation of low-attenuation plaque (LAP) by using semiautomated software and to assess whether the use of a proposed automated function (LAP editor) that excludes voxels adjacent to the outer vessel wall improves the relationship between LAP and the presence and size of the lipid-rich component (LRC) verified at intravascular US. At coronary CT angiography, quantification of LAP can improve risk stratification. Plaque, defined as the area between the vessel and the lumen wall, is prone to partial volume effects from the surrounding pericoronary adipose tissue. Materials and Methods The percentage of LAP (%LAP), defined as the percentage of noncalcified plaque with an attenuation value lower than 30 HU (LAP/total plaque volume) at greater than or equal to 0 mm (%LAP0), greater than or equal to 0.1 mm (%LAP0.1), greater than or equal to 0.3 mm (%LAP0.3), greater than or equal to 0.5 mm (%LAP0.5), and greater than or equal to 0.7 mm (%LAP0.7) inward from the vessel wall boundaries, were quantified in 155 plaques in 90 patients who underwent coronary CT angiography before intravascular US. At intravascular US, the LRC was identified by using echo attenuation, and its size was measured by using the attenuation score (summed score/analysis length) based on the attenuation arc (1 = < 90°, 2 = 90° to < 180°, 3 = 180° to < 270°, 4 = 270°-360°) for every 1 mm. Results Use of LAP editing improved the ability for discriminating LRC (areas under receiver operating characteristic curve: 0.667 with %LAP0, 0.713 with %LAP0.1 [P < .001 for comparison with %LAP0]), 0.778 with %LAP0.3 [P < .001], 0.825 with %LAP0.5 [P < .001], 0.802 with %LAP0.7 [P = .002]). %LAP0.5 had the strongest correlation (r = 0.612, P < .001) with LRC size, whereas %LAP0 resulted in the weakest correlation (r = 0.307; P < .001). Conclusion Evaluation of LAP at coronary CT angiography can be significantly improved by excluding voxels that are adjacent to the vessel wall boundaries by 0.5 mm.Supplemental material is available for this article.© RSNA, 2019.
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Affiliation(s)
- Hidenari Matsumoto
- Department of Imaging (H.M., E.E., Y.O., O.M., S.C., P.J.S., B.K.T., D.S.B.), Heart Institute (B.K.T., D.S.B.), and Biomedical Imaging Research Institute (D.D.), Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA 90048, and Department of Cardiology, Kusatsu Heart Center, Kusatsu, Shiga, Japan (S.W., E.K., T.T., Y.A.)
| | - Satoshi Watanabe
- Department of Imaging (H.M., E.E., Y.O., O.M., S.C., P.J.S., B.K.T., D.S.B.), Heart Institute (B.K.T., D.S.B.), and Biomedical Imaging Research Institute (D.D.), Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA 90048, and Department of Cardiology, Kusatsu Heart Center, Kusatsu, Shiga, Japan (S.W., E.K., T.T., Y.A.)
| | - Eisho Kyo
- Department of Imaging (H.M., E.E., Y.O., O.M., S.C., P.J.S., B.K.T., D.S.B.), Heart Institute (B.K.T., D.S.B.), and Biomedical Imaging Research Institute (D.D.), Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA 90048, and Department of Cardiology, Kusatsu Heart Center, Kusatsu, Shiga, Japan (S.W., E.K., T.T., Y.A.)
| | - Takafumi Tsuji
- Department of Imaging (H.M., E.E., Y.O., O.M., S.C., P.J.S., B.K.T., D.S.B.), Heart Institute (B.K.T., D.S.B.), and Biomedical Imaging Research Institute (D.D.), Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA 90048, and Department of Cardiology, Kusatsu Heart Center, Kusatsu, Shiga, Japan (S.W., E.K., T.T., Y.A.)
| | - Yosuke Ando
- Department of Imaging (H.M., E.E., Y.O., O.M., S.C., P.J.S., B.K.T., D.S.B.), Heart Institute (B.K.T., D.S.B.), and Biomedical Imaging Research Institute (D.D.), Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA 90048, and Department of Cardiology, Kusatsu Heart Center, Kusatsu, Shiga, Japan (S.W., E.K., T.T., Y.A.)
| | - Evann Eisenberg
- Department of Imaging (H.M., E.E., Y.O., O.M., S.C., P.J.S., B.K.T., D.S.B.), Heart Institute (B.K.T., D.S.B.), and Biomedical Imaging Research Institute (D.D.), Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA 90048, and Department of Cardiology, Kusatsu Heart Center, Kusatsu, Shiga, Japan (S.W., E.K., T.T., Y.A.)
| | - Yuka Otaki
- Department of Imaging (H.M., E.E., Y.O., O.M., S.C., P.J.S., B.K.T., D.S.B.), Heart Institute (B.K.T., D.S.B.), and Biomedical Imaging Research Institute (D.D.), Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA 90048, and Department of Cardiology, Kusatsu Heart Center, Kusatsu, Shiga, Japan (S.W., E.K., T.T., Y.A.)
| | - Osamu Manabe
- Department of Imaging (H.M., E.E., Y.O., O.M., S.C., P.J.S., B.K.T., D.S.B.), Heart Institute (B.K.T., D.S.B.), and Biomedical Imaging Research Institute (D.D.), Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA 90048, and Department of Cardiology, Kusatsu Heart Center, Kusatsu, Shiga, Japan (S.W., E.K., T.T., Y.A.)
| | - Sebastien Cadet
- Department of Imaging (H.M., E.E., Y.O., O.M., S.C., P.J.S., B.K.T., D.S.B.), Heart Institute (B.K.T., D.S.B.), and Biomedical Imaging Research Institute (D.D.), Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA 90048, and Department of Cardiology, Kusatsu Heart Center, Kusatsu, Shiga, Japan (S.W., E.K., T.T., Y.A.)
| | - Piotr J Slomka
- Department of Imaging (H.M., E.E., Y.O., O.M., S.C., P.J.S., B.K.T., D.S.B.), Heart Institute (B.K.T., D.S.B.), and Biomedical Imaging Research Institute (D.D.), Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA 90048, and Department of Cardiology, Kusatsu Heart Center, Kusatsu, Shiga, Japan (S.W., E.K., T.T., Y.A.)
| | - Balaji K Tamarappoo
- Department of Imaging (H.M., E.E., Y.O., O.M., S.C., P.J.S., B.K.T., D.S.B.), Heart Institute (B.K.T., D.S.B.), and Biomedical Imaging Research Institute (D.D.), Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA 90048, and Department of Cardiology, Kusatsu Heart Center, Kusatsu, Shiga, Japan (S.W., E.K., T.T., Y.A.)
| | - Daniel S Berman
- Department of Imaging (H.M., E.E., Y.O., O.M., S.C., P.J.S., B.K.T., D.S.B.), Heart Institute (B.K.T., D.S.B.), and Biomedical Imaging Research Institute (D.D.), Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA 90048, and Department of Cardiology, Kusatsu Heart Center, Kusatsu, Shiga, Japan (S.W., E.K., T.T., Y.A.)
| | - Damini Dey
- Department of Imaging (H.M., E.E., Y.O., O.M., S.C., P.J.S., B.K.T., D.S.B.), Heart Institute (B.K.T., D.S.B.), and Biomedical Imaging Research Institute (D.D.), Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA 90048, and Department of Cardiology, Kusatsu Heart Center, Kusatsu, Shiga, Japan (S.W., E.K., T.T., Y.A.)
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Emerging Role of Coronary Computed Tomography Angiography in Lipid-Lowering Therapy: a Bridge to Image-Guided Personalized Medicine. Curr Cardiol Rep 2019; 21:72. [DOI: 10.1007/s11886-019-1170-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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Matsumoto H, Watanabe S, Kyo E, Tsuji T, Ando Y, Otaki Y, Cadet S, Gransar H, Berman DS, Slomka P, Tamarappoo BK, Dey D. Standardized volumetric plaque quantification and characterization from coronary CT angiography: a head-to-head comparison with invasive intravascular ultrasound. Eur Radiol 2019; 29:6129-6139. [PMID: 31028446 DOI: 10.1007/s00330-019-06219-3] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Revised: 03/29/2019] [Accepted: 04/03/2019] [Indexed: 12/19/2022]
Abstract
OBJECTIVES We sought to evaluate the accuracy of standardized total plaque volume (TPV) measurement and low-density non-calcified plaque (LDNCP) assessment from coronary CT angiography (CTA) in comparison with intravascular ultrasound (IVUS). METHODS We analyzed 118 plaques without extensive calcifications from 77 consecutive patients who underwent CTA prior to IVUS. CTA TPV was measured with semi-automated software comparing both scan-specific (automatically derived from scan) and fixed attenuation thresholds. From CTA, %LDNCP was calculated voxels below multiple LDNCP thresholds (30, 45, 60, 75, and 90 Hounsfield units [HU]) within the plaque. On IVUS, the lipid-rich component was identified by echo attenuation, and its size was measured using attenuation score (summed score ∕ analysis length) based on attenuation arc (1 = < 90°; 2 = 90-180°; 3 = 180-270°; 4 = 270-360°) every 1 mm. RESULTS TPV was highly correlated between CTA using scan-specific thresholds and IVUS (r = 0.943, p < 0.001), with no significant difference (2.6 mm3, p = 0.270). These relationships persisted for calcification patterns (maximal IVUS calcium arc of 0°, < 90°, or ≥ 90°). The fixed thresholds underestimated TPV (- 22.0 mm3, p < 0.001) and had an inferior correlation with IVUS (p < 0.001) compared with scan-specific thresholds. A 45-HU cutoff yielded the best diagnostic performance for identification of lipid-rich component, with an area under the curve of 0.878 vs. 0.840 for < 30 HU (p = 0.023), and corresponding %LDNCP resulted in the strongest correlation with the lipid-rich component size (r = 0.691, p < 0.001). CONCLUSIONS Standardized noninvasive plaque quantification from CTA using scan-specific thresholds correlates highly with IVUS. Use of a < 45-HU threshold for LDNCP quantification improves lipid-rich plaque assessment from CTA. KEY POINTS • Standardized scan-specific threshold-based plaque quantification from coronary CT angiography provides an accurate total plaque volume measurement compared with intravascular ultrasound. • Attenuation histogram-based low-density non-calcified plaque quantification can improve lipid-rich plaque assessment from coronary CT angiography.
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Affiliation(s)
- Hidenari Matsumoto
- Department of Imaging and Medicine, Cedars-Sinai Medical Center, 8700 Beverly Boulevard, Los Angeles, CA, 90048, USA.
| | - Satoshi Watanabe
- Department of Cardiology, Kusatsu Heart Center, Kusatsu, Shiga, Japan
| | - Eisho Kyo
- Department of Cardiology, Kusatsu Heart Center, Kusatsu, Shiga, Japan
| | - Takafumi Tsuji
- Department of Cardiology, Kusatsu Heart Center, Kusatsu, Shiga, Japan
| | - Yosuke Ando
- Department of Cardiology, Kusatsu Heart Center, Kusatsu, Shiga, Japan
| | - Yuka Otaki
- Department of Imaging and Medicine, Cedars-Sinai Medical Center, 8700 Beverly Boulevard, Los Angeles, CA, 90048, USA
| | - Sebastien Cadet
- Department of Imaging and Medicine, Cedars-Sinai Medical Center, 8700 Beverly Boulevard, Los Angeles, CA, 90048, USA
| | - Heidi Gransar
- Department of Imaging and Medicine, Cedars-Sinai Medical Center, 8700 Beverly Boulevard, Los Angeles, CA, 90048, USA
| | - Daniel S Berman
- Department of Imaging and Medicine, Cedars-Sinai Medical Center, 8700 Beverly Boulevard, Los Angeles, CA, 90048, USA
| | - Piotr Slomka
- Department of Imaging and Medicine, Cedars-Sinai Medical Center, 8700 Beverly Boulevard, Los Angeles, CA, 90048, USA
| | - Balaji K Tamarappoo
- Department of Imaging and Medicine, Cedars-Sinai Medical Center, 8700 Beverly Boulevard, Los Angeles, CA, 90048, USA
- The Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Damini Dey
- Biomedical Imaging Research Institute, Cedars-Sinai Medical Center, Los Angeles, CA, USA
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Prognostic Value and Therapeutic Perspectives of Coronary CT Angiography: A Literature Review. BIOMED RESEARCH INTERNATIONAL 2018; 2018:6528238. [PMID: 30306089 PMCID: PMC6165606 DOI: 10.1155/2018/6528238] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Accepted: 08/01/2018] [Indexed: 12/16/2022]
Abstract
Coronary stenosis severity is both a powerful and a still debated predictor of prognosis in coronary artery disease. Coronary computed tomographic angiography (CCTA) has emerged as a noninvasive technique that enables anatomic visualization of coronary artery disease (CAD). CCTA with newer applications, plaque characterization and physiologic/functional evaluation, allows a comprehensive diagnostic and prognostic assessment of otherwise low-intermediate subjects for primary prevention. CCTA measures the overall plaque burden, differentiates plaque subtypes, and identifies high-risk plaque with good reproducibility. Research in this field may also advance towards an era of personalized risk prediction and individualized medical therapy. It has been demonstrated that statins may delay plaque progression and change some plaque features. The potential effects on plaque modifications induced by other medical therapies have also been investigated. Although it is not currently possible to recommend routinely serial scans to monitor the therapeutic efficacy of medical interventions, the plaque modulation, as a part of risk modification, appears a feasible strategy. In this review we summarize the current evidence regarding vulnerable plaque and effects of lipid lowering therapy on morphological features of CAD. We also discuss the potential ability of CCTA to characterize coronary atherosclerosis, stratify prognosis of asymptomatic subjects, and guide medical therapy.
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Al-Mallah MH. Unlocking the secrets of high-risk lipid rich plaque: Are we there? Atherosclerosis 2018; 275:382-383. [PMID: 29961600 DOI: 10.1016/j.atherosclerosis.2018.06.873] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Accepted: 06/20/2018] [Indexed: 11/29/2022]
Affiliation(s)
- Mouaz H Al-Mallah
- Advanced Cardiac Imaging, King Abdulaziz Cardiac Center, Ministry of National Guard - Health Affairs, Riyadh, Saudi Arabia; King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia; King Abdullah International Medical Research Center, Riyadh, Saudi Arabia.
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Wang C, Liao Y, Chen H, Zhen X, Li J, Xu Y, Zhou L. Influence of tube potential on quantitative coronary plaque analyses by low radiation dose computed tomography: a phantom study. Int J Cardiovasc Imaging 2018; 34:1315-1322. [PMID: 29582238 DOI: 10.1007/s10554-018-1344-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/29/2017] [Accepted: 03/22/2018] [Indexed: 12/18/2022]
Abstract
Previous studies have shown that employing the low dose computed tomography (CT) technique based on low tube potential reduces the radiation dose required for the coronary artery examination protocol. However, low tube potential may adversely influence the CT number of plaque composition. Therefore, we aimed to determine whether quantitative atherosclerotic plaque analysis by a multi-slice, low radiation dose CT protocol using 80 kilovolts (kV) yields results comparable to those of the standard 120 kV protocol. Artificial plaque samples (n = 17) composed of three kinds of plaque were scanned at 120 and 80 kV. Relative low-density and medium-density plaque component volumes obtained by three protocols (80 kV, 60 Hounsfield units [HU] threshold; 120 kV, 60 HU threshold; and 80 kV, 82 HU threshold) were compared. Using the 60 HU threshold, relative volume of the low-density plaque component obtained at 80 kV was lower than that obtained at 120 kV (27 ± 3% vs. 51 ± 5%, P < 0.001), whereas relative volume of the medium-density plaque component obtained at 80 kV was higher than that obtained at 120 kV (73 ± 3% vs. 48 ± 5%, P < 0.001). By contrast, no significant difference in relative volume obtained at 80 kV (82 HU threshold) versus 120 kV (60 HU threshold) was observed for either low-density (52 ± 5% vs. 51 ± 5%) or medium-density (48 ± 5% vs. 48 ± 5%) plaque component. Low tube potential may affect the accuracy of quantitative atherosclerotic plaque analysis. For our phantom test, 82 HU was the optimal threshold for scanning at 80 kV.
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Affiliation(s)
- Chunhong Wang
- Department of Radiology, Xinyang Central Hospital, Xinyang, 464002, Henan, China
| | - Yuliang Liao
- Department of Biomedical Engineering, Southern Medical University, Guangzhou, 510515, Guangdong, China
| | - Haibin Chen
- Department of Biomedical Engineering, Southern Medical University, Guangzhou, 510515, Guangdong, China
| | - Xin Zhen
- Department of Biomedical Engineering, Southern Medical University, Guangzhou, 510515, Guangdong, China
| | - Jianhong Li
- Department of Radiology, Xinyang Central Hospital, Xinyang, 464002, Henan, China
| | - Yikai Xu
- Department of Medical Imaging Center, Nanfang Hospital, Southern Medical University, No. 1838 Guangzhou Avenue North, Guangzhou, 510515, Guangdong, China.
| | - Linghong Zhou
- Department of Biomedical Engineering, Southern Medical University, Guangzhou, 510515, Guangdong, China.
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Symons R, Choi Y, Cork TE, Ahlman MA, Mallek M, Bluemke DA, Sandfort V. Optimized energy of spectral coronary CT angiography for coronary plaque detection and quantification. J Cardiovasc Comput Tomogr 2018; 12:108-114. [DOI: 10.1016/j.jcct.2018.01.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Revised: 01/09/2018] [Accepted: 01/22/2018] [Indexed: 10/18/2022]
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Johnson JL, Merrilees M, Shragge J, van Wijk K. All-optical extravascular laser-ultrasound and photoacoustic imaging of calcified atherosclerotic plaque in excised carotid artery. PHOTOACOUSTICS 2018; 9:62-72. [PMID: 29707480 PMCID: PMC5914201 DOI: 10.1016/j.pacs.2018.01.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Revised: 12/05/2017] [Accepted: 01/16/2018] [Indexed: 05/16/2023]
Abstract
Photoacoustic (PA) imaging may be advantageous as a safe, non-invasive imaging modality to image the carotid artery. However, calcification that accompanies atherosclerotic plaque is difficult to detect with PA due to the non-distinct optical absorption spectrum of hydroxyapatite. We propose reflection-mode all-optical laser-ultrasound (LUS) imaging to obtain high-resolution, non-contact, non-ionizing images of the carotid artery wall and calcification. All-optical LUS allows for flexible acquisition geometry and user-dependent data acquisition for high repeatability. We apply all-optical techniques to image an excised human carotid artery. Internal layers of the artery wall, enlargement of the vessel, and calcification are observed with higher resolution and reduced artifacts with nonconfocal LUS compared to confocal LUS. Validation with histology and X-ray computed tomography (CT) demonstrates the potential for LUS as a method for non-invasive imaging in the carotid artery.
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Affiliation(s)
- Jami L. Johnson
- University of Auckland, Faculty of Science, Department of Physics, Dodd-Walls Centre for Photonic and Quantum Technologies, Private Bag 92019, Auckland 1010, New Zealand
- Corresponding author.
| | - Mervyn Merrilees
- University of Auckland, Faculty of Medical and Health Sciences, Department of Anatomy and Medical Imaging, Private Bag 92019, Auckland 1142, New Zealand
| | - Jeffrey Shragge
- Colorado School of Mines, Center for Wave Phenomena, Geophysics Department, Golden, CO, USA
| | - Kasper van Wijk
- University of Auckland, Faculty of Science, Department of Physics, Dodd-Walls Centre for Photonic and Quantum Technologies, Private Bag 92019, Auckland 1010, New Zealand
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Liu X, Wu G, Xu C, He Y, Shu L, Liu Y, Zhang N, Lin C. Prediction of coronary plaque progression using biomechanical factors and vascular characteristics based on computed tomography angiography. Comput Assist Surg (Abingdon) 2017; 22:286-294. [PMID: 29032716 DOI: 10.1080/24699322.2017.1389407] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
OBJECTIVES Coronary atherosclerotic plaques progress in a highly individual manner. Accurately predicting plaque progression will promote clinical management of atherosclerosis. The purpose of this study was to investigate the role of local biomechanics factors and vascular characteristics in coronary plaque progression and arterial remodeling. METHODS Computed tomography angiography-based three-dimensional reconstruction of the native right coronary artery was performed in vivo in twelve patients with acute coronary syndrome at baseline and 12-month follow-up. The reconstructed arteries were divided into sequential 3-mm-long segments. Wall shear stress (WSS) and von Mises stress (VMS) were computed in all segments at baseline by applying fluid-structure interaction simulations. RESULTS In total, 365 segments 3-mm long were analyzed. The decrease in minimal lumen area was independently predicted by low baseline VMS (-0.73 ± 0.13 mm2), increase in plaque burden was independently predicted by small minimal lumen area and low baseline WSS (6.28 ± 0.96%), and decrease in plaque volume was independently predicted by low baseline VMS (-0.99 ± 0.49 mm3). Negative remodeling was more likely to occur in low- (55%) and moderate-VMS (40%) segments, but expansive remodeling was more likely to occur in high-VMS (44%) segments. CONCLUSIONS Local von Mises stress, wall shear stress, minimal lumen area, and plaque burden provide independent and additive prediction in identifying coronary plaque progression and arterial remodeling.
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Affiliation(s)
- Xiujian Liu
- a Beijing Institute of Heart, Lung, and Blood Vessel Diseases , Beijing Anzhen Hospital, Capital Medical University , Beijing , China
| | - Guanghui Wu
- a Beijing Institute of Heart, Lung, and Blood Vessel Diseases , Beijing Anzhen Hospital, Capital Medical University , Beijing , China
| | - Chuangye Xu
- a Beijing Institute of Heart, Lung, and Blood Vessel Diseases , Beijing Anzhen Hospital, Capital Medical University , Beijing , China
| | - Yuna He
- a Beijing Institute of Heart, Lung, and Blood Vessel Diseases , Beijing Anzhen Hospital, Capital Medical University , Beijing , China
| | - Lixia Shu
- a Beijing Institute of Heart, Lung, and Blood Vessel Diseases , Beijing Anzhen Hospital, Capital Medical University , Beijing , China
| | - Yuyang Liu
- a Beijing Institute of Heart, Lung, and Blood Vessel Diseases , Beijing Anzhen Hospital, Capital Medical University , Beijing , China
| | - Nan Zhang
- a Beijing Institute of Heart, Lung, and Blood Vessel Diseases , Beijing Anzhen Hospital, Capital Medical University , Beijing , China
| | - Changyan Lin
- a Beijing Institute of Heart, Lung, and Blood Vessel Diseases , Beijing Anzhen Hospital, Capital Medical University , Beijing , China
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Iterative Image Reconstruction Improves the Accuracy of Automated Plaque Burden Assessment in Coronary CT Angiography: A Comparison With Intravascular Ultrasound. AJR Am J Roentgenol 2017; 208:777-784. [PMID: 28177655 DOI: 10.2214/ajr.16.17187] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
OBJECTIVE The purpose of this study was to determine whether use of iterative image reconstruction algorithms improves the accuracy of coronary CT angiography (CCTA) compared with intravascular ultrasound (IVUS) in semiautomated plaque burden assessment. MATERIALS AND METHODS CCTA and IVUS images of seven coronary arteries were acquired ex vivo. CT images were reconstructed with filtered back projection (FBP) and adaptive statistical (ASIR) and model-based (MBIR) iterative reconstruction algorithms. Cross-sectional images of the arteries were coregistered between CCTA and IVUS in 1-mm increments. In CCTA, fully automated (without manual corrections) and semiautomated (allowing manual corrections of vessel wall boundaries) plaque burden assessments were performed for each of the reconstruction algorithms with commercially available software. In IVUS, plaque burden was measured manually. Agreement between CCTA and IVUS was determined with Pearson correlation. RESULTS A total of 173 corresponding cross sections were included. The mean plaque burden measured with IVUS was 63.39% ± 10.63%. With CCTA and the fully automated technique, it was 54.90% ± 11.70% with FBP, 53.34% ± 13.11% with ASIR, and 55.35% ± 12.22% with MBIR. With CCTA and the semiautomated technique mean plaque burden was 54.90% ± 11.76%, 53.40% ± 12.85%, 57.09% ± 11.05%. Manual correction of the semiautomated assessments was performed in 39% of all cross sections and improved plaque burden correlation with the IVUS assessment independently of reconstruction algorithm (p < 0.0001). Furthermore, MBIR was superior to FBP and ASIR independently of assessment method (semiautomated, r = 0.59 for FBP, r = 0.52 for ASIR, r = 0.78 for MBIR, all p < 0.001; fully automated, r = 0.40 for FBP, r = 0.37 for ASIR, r = 0.53 for MBIR, all p < 0.001). CONCLUSION For the quantification of plaque burden with CCTA, MBIR led to better correlation with IVUS than did traditional reconstruction algorithms such as FBP, independently of the use of a fully automated or semiautomated assessment approach. The highest accuracy for quantifying plaque burden with CCTA can be achieved by using MBIR data with semiautomated assessment.
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15
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Abstract
Advances in cardiovascular computed tomography (CT) have resulted in an excellent ability to exclude coronary heart disease (CHD). Anatomical information, functional information, and spectral information can already be obtained with current CT technologies. Moreover, novel developments such as targeted nanoparticle contrast agents, photon-counting CT, and phase contrast CT will further enhance the diagnostic value of cardiovascular CT. This review provides an overview of current state of the art and future cardiovascular CT imaging.
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16
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Serial Coronary Imaging of Early Atherosclerosis Development in Fast-Food-Fed Diabetic and Nondiabetic Swine. JACC Basic Transl Sci 2016; 1:449-460. [PMID: 30167532 PMCID: PMC6113514 DOI: 10.1016/j.jacbts.2016.08.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2016] [Revised: 08/05/2016] [Accepted: 08/22/2016] [Indexed: 11/23/2022]
Abstract
Patients with diabetes mellitus (DM) are at increased risk for atherosclerosis-related events compared to non-DM (NDM) patients. With an expected worldwide epidemic of DM, early detection of anatomic and functional coronary atherosclerotic changes is gaining attention. To improve our understanding of early atherosclerosis development, we studied a swine model that gradually developed coronary atherosclerosis. Interestingly, optical coherence tomography, near-infrared spectroscopy (NIRS), vascular function, and histology demonstrated no differences between development of early atherosclerosis in fast-food-fed (FF) DM swine and that in FF-NDM swine. Coronary computed tomography angiography did not detect early atherosclerosis, but optical coherence tomography and near-infrared spectroscopy demonstrated coronary atherosclerosis development in FF-DM and FF-NDM swine.
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Key Words
- CCTA, coronary computed tomography angiography
- DM, diabetes mellitus
- FF, fast-food-fed
- FIT, fibrous intimal thickening
- LCP, lipid core plaque
- LL, lipid-laden
- NDM, no/non-diabetes mellitus
- NIRS, near-infrared spectroscopy
- OCT, optical coherence tomography
- QCA, quantitative coronary angiography
- SNAP, S-nitroso-N-acetylpenicillamine
- animal model
- coronary artery disease
- coronary computed tomography angiography
- diabetes mellitus
- near-infrared spectroscopy
- optical coherence tomography
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17
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Chinnaiyan KM, Raff GL. Coronary CT Angiography in the Emergency Department: Current Status. CURRENT TREATMENT OPTIONS IN CARDIOVASCULAR MEDICINE 2016; 18:62. [DOI: 10.1007/s11936-016-0484-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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18
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Andrews J, Puri R, Kataoka Y, Nicholls SJ, Psaltis PJ. Therapeutic modulation of the natural history of coronary atherosclerosis: lessons learned from serial imaging studies. Cardiovasc Diagn Ther 2016; 6:282-303. [PMID: 27500089 DOI: 10.21037/cdt.2015.10.02] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Despite advances in risk prediction, preventive and therapeutic strategies, atherosclerotic cardiovascular disease remains a major public health challenge worldwide, carrying considerable morbidity, mortality and health economic burden. There continues to be a need to better understand the natural history of this disease to guide the development of more effective treatment, integral to which is the rapidly evolving field of coronary artery imaging. Various imaging modalities have been refined to enable detailed visualization of the pathological substrate of atherosclerosis, providing accurate and reproducible measures of coronary plaque burden and composition, including the presence of high-risk characteristics. The serial application of such techniques, including coronary computed tomography angiography (CTA), intravascular ultrasound (IVUS) and optical coherence tomography (OCT) have uncovered important insights into the progression of coronary plaque over time in patients with stable and unstable coronary artery disease (CAD), and its responsiveness to therapeutic interventions. Here we review the use of different imaging modalities for the surveillance of coronary atherosclerosis and the lessons they have provided about the modulation of CAD by both traditional and experimental therapies.
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Affiliation(s)
- Jordan Andrews
- Vascular Research Centre, Heart Health Theme, South Australian Health and Medical Research Institute & School of Medicine, University of Adelaide, Adelaide, Australia
| | - Rishi Puri
- Québec Heart & Lung Institute (IUCPQ), Hospital Laval, Québec (Québec), Canada; ; Cleveland Clinic Coordinating Center for Clinical Research (C5R), Cleveland, Ohio, USA
| | - Yu Kataoka
- National Cerebral and Cardiovascular Center, Osaka, Japan
| | - Stephen J Nicholls
- Vascular Research Centre, Heart Health Theme, South Australian Health and Medical Research Institute & School of Medicine, University of Adelaide, Adelaide, Australia
| | - Peter J Psaltis
- Vascular Research Centre, Heart Health Theme, South Australian Health and Medical Research Institute & School of Medicine, University of Adelaide, Adelaide, Australia
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19
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Abstract
Advances in atherosclerosis imaging technology and research have provided a range of diagnostic tools to characterize high-risk plaque in vivo; however, these important vascular imaging methods additionally promise great scientific and translational applications beyond this quest. When combined with conventional anatomic- and hemodynamic-based assessments of disease severity, cross-sectional multimodal imaging incorporating molecular probes and other novel noninvasive techniques can add detailed interrogation of plaque composition, activity, and overall disease burden. In the catheterization laboratory, intravascular imaging provides unparalleled access to the world beneath the plaque surface, allowing tissue characterization and measurement of cap thickness with micrometer spatial resolution. Atherosclerosis imaging captures key data that reveal snapshots into underlying biology, which can test our understanding of fundamental research questions and shape our approach toward patient management. Imaging can also be used to quantify response to therapeutic interventions and ultimately help predict cardiovascular risk. Although there are undeniable barriers to clinical translation, many of these hold-ups might soon be surpassed by rapidly evolving innovations to improve image acquisition, coregistration, motion correction, and reduce radiation exposure. This article provides a comprehensive review of current and experimental atherosclerosis imaging methods and their uses in research and potential for translation to the clinic.
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Affiliation(s)
- Jason M Tarkin
- From the Division of Cardiovascular Medicine, University of Cambridge, Cambridge, UK (J.M.T., A.J.B., J.H.F.R.); Department of Clinical Neuroscience, University of Cambridge, Cambridge, UK (N.R.E.); Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, United Kingdom (M.R.D); Cardiac MR PET CT Program, Massachusetts General Hospital and Harvard Medical School, Boston, MA (R.A.P.T., A.T.); Imaging Sciences Laboratories, Translational and Molecular Imaging Institute, Icahn School of Medicine at Mount Sinai, NY (Z.A.F., M.R.D.); and Department of Cardiology, Zena and Michael A. Wiener Cardiovascular Institute, Icahn School of Medicine at Mount Sinai, NY (Z.A.F.)
| | - Marc R Dweck
- From the Division of Cardiovascular Medicine, University of Cambridge, Cambridge, UK (J.M.T., A.J.B., J.H.F.R.); Department of Clinical Neuroscience, University of Cambridge, Cambridge, UK (N.R.E.); Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, United Kingdom (M.R.D); Cardiac MR PET CT Program, Massachusetts General Hospital and Harvard Medical School, Boston, MA (R.A.P.T., A.T.); Imaging Sciences Laboratories, Translational and Molecular Imaging Institute, Icahn School of Medicine at Mount Sinai, NY (Z.A.F., M.R.D.); and Department of Cardiology, Zena and Michael A. Wiener Cardiovascular Institute, Icahn School of Medicine at Mount Sinai, NY (Z.A.F.)
| | - Nicholas R Evans
- From the Division of Cardiovascular Medicine, University of Cambridge, Cambridge, UK (J.M.T., A.J.B., J.H.F.R.); Department of Clinical Neuroscience, University of Cambridge, Cambridge, UK (N.R.E.); Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, United Kingdom (M.R.D); Cardiac MR PET CT Program, Massachusetts General Hospital and Harvard Medical School, Boston, MA (R.A.P.T., A.T.); Imaging Sciences Laboratories, Translational and Molecular Imaging Institute, Icahn School of Medicine at Mount Sinai, NY (Z.A.F., M.R.D.); and Department of Cardiology, Zena and Michael A. Wiener Cardiovascular Institute, Icahn School of Medicine at Mount Sinai, NY (Z.A.F.)
| | - Richard A P Takx
- From the Division of Cardiovascular Medicine, University of Cambridge, Cambridge, UK (J.M.T., A.J.B., J.H.F.R.); Department of Clinical Neuroscience, University of Cambridge, Cambridge, UK (N.R.E.); Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, United Kingdom (M.R.D); Cardiac MR PET CT Program, Massachusetts General Hospital and Harvard Medical School, Boston, MA (R.A.P.T., A.T.); Imaging Sciences Laboratories, Translational and Molecular Imaging Institute, Icahn School of Medicine at Mount Sinai, NY (Z.A.F., M.R.D.); and Department of Cardiology, Zena and Michael A. Wiener Cardiovascular Institute, Icahn School of Medicine at Mount Sinai, NY (Z.A.F.)
| | - Adam J Brown
- From the Division of Cardiovascular Medicine, University of Cambridge, Cambridge, UK (J.M.T., A.J.B., J.H.F.R.); Department of Clinical Neuroscience, University of Cambridge, Cambridge, UK (N.R.E.); Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, United Kingdom (M.R.D); Cardiac MR PET CT Program, Massachusetts General Hospital and Harvard Medical School, Boston, MA (R.A.P.T., A.T.); Imaging Sciences Laboratories, Translational and Molecular Imaging Institute, Icahn School of Medicine at Mount Sinai, NY (Z.A.F., M.R.D.); and Department of Cardiology, Zena and Michael A. Wiener Cardiovascular Institute, Icahn School of Medicine at Mount Sinai, NY (Z.A.F.)
| | - Ahmed Tawakol
- From the Division of Cardiovascular Medicine, University of Cambridge, Cambridge, UK (J.M.T., A.J.B., J.H.F.R.); Department of Clinical Neuroscience, University of Cambridge, Cambridge, UK (N.R.E.); Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, United Kingdom (M.R.D); Cardiac MR PET CT Program, Massachusetts General Hospital and Harvard Medical School, Boston, MA (R.A.P.T., A.T.); Imaging Sciences Laboratories, Translational and Molecular Imaging Institute, Icahn School of Medicine at Mount Sinai, NY (Z.A.F., M.R.D.); and Department of Cardiology, Zena and Michael A. Wiener Cardiovascular Institute, Icahn School of Medicine at Mount Sinai, NY (Z.A.F.)
| | - Zahi A Fayad
- From the Division of Cardiovascular Medicine, University of Cambridge, Cambridge, UK (J.M.T., A.J.B., J.H.F.R.); Department of Clinical Neuroscience, University of Cambridge, Cambridge, UK (N.R.E.); Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, United Kingdom (M.R.D); Cardiac MR PET CT Program, Massachusetts General Hospital and Harvard Medical School, Boston, MA (R.A.P.T., A.T.); Imaging Sciences Laboratories, Translational and Molecular Imaging Institute, Icahn School of Medicine at Mount Sinai, NY (Z.A.F., M.R.D.); and Department of Cardiology, Zena and Michael A. Wiener Cardiovascular Institute, Icahn School of Medicine at Mount Sinai, NY (Z.A.F.)
| | - James H F Rudd
- From the Division of Cardiovascular Medicine, University of Cambridge, Cambridge, UK (J.M.T., A.J.B., J.H.F.R.); Department of Clinical Neuroscience, University of Cambridge, Cambridge, UK (N.R.E.); Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, United Kingdom (M.R.D); Cardiac MR PET CT Program, Massachusetts General Hospital and Harvard Medical School, Boston, MA (R.A.P.T., A.T.); Imaging Sciences Laboratories, Translational and Molecular Imaging Institute, Icahn School of Medicine at Mount Sinai, NY (Z.A.F., M.R.D.); and Department of Cardiology, Zena and Michael A. Wiener Cardiovascular Institute, Icahn School of Medicine at Mount Sinai, NY (Z.A.F.).
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Aghayev A, Murphy DJ, Keraliya AR, Steigner ML. Recent developments in the use of computed tomography scanners in coronary artery imaging. Expert Rev Med Devices 2016; 13:545-53. [PMID: 27140944 DOI: 10.1080/17434440.2016.1184968] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
INTRODUCTION Within the past decade, substantial evolution of Coronary CT Angiography (CCTA) has affected evaluation and management of coronary artery disease. In particular, technical advancement of hardware technology and image reconstruction of CT scanners have played an important role in this context making it possible to acquire abundant data with excellent temporal and spatial resolution within a shorter scan time. In addition, a concern related to the high radiation exposure in the initial noninvasive coronary artery imaging has triggered improvement in dose reduction techniques. AREAS COVERED In this review article, we have focused on recent technological developments in CT scanners and the impact of these developments on CCTA parameters. Expert Commentary: CCTA plays an important role in coronary artery disease management, and technical development of the CT scanners can be expected to address and remedy technical limitations.
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Affiliation(s)
- Ayaz Aghayev
- a Department of Radiology , Brigham and Women's Hospital , Boston , MA , USA
| | - David J Murphy
- a Department of Radiology , Brigham and Women's Hospital , Boston , MA , USA
| | - Abhishek R Keraliya
- a Department of Radiology , Brigham and Women's Hospital , Boston , MA , USA
| | - Michael L Steigner
- a Department of Radiology , Brigham and Women's Hospital , Boston , MA , USA
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21
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Cardiovascular Imaging: The Past and the Future, Perspectives in Computed Tomography and Magnetic Resonance Imaging. Invest Radiol 2016; 50:557-70. [PMID: 25985464 DOI: 10.1097/rli.0000000000000164] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Today's noninvasive imaging of the cardiovascular system has revolutionized the approach to various diseases and has substantially affected prognostic information. Cardiovascular magnetic resonance (MR) and computed tomographic (CT) imaging are at center stage of these approaches, although 5 decades ago, these technologies were unheard of. Both modalities had their inception in the 1970s with a primary focus on noncardiovascular applications. The technical development of the various decades, however, substantially pushed the envelope for cardiovascular MR and CT applications. Within the past 10-15 years, MR and CT technologies have pushed each other in cardiac applications; and without the "rival" modality, neither one would likely not have reached its potential today. This view on the history of MR and CT in the field of cardiovascular applications provides insight into the story of success of applications that once have been ideas only but are at prime time today.
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22
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Celeng C, Takx RAP, Ferencik M, Maurovich-Horvat P. Non-invasive and invasive imaging of vulnerable coronary plaque. Trends Cardiovasc Med 2016; 26:538-47. [PMID: 27079893 DOI: 10.1016/j.tcm.2016.03.005] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/12/2015] [Revised: 02/28/2016] [Accepted: 03/10/2016] [Indexed: 12/20/2022]
Abstract
Vulnerable plaque is characterized by a large necrotic core and an overlying thin fibrous cap. Non-invasive imaging modalities such as computed tomography angiography (CTA) and magnetic resonance imaging (MRI) allow for the assessment of morphological plaque characteristics, while positron emission tomography (PET) enables the detection of metabolic activity within the atherosclerotic lesions. Invasive imaging modalities such as intravascular ultrasound (IVUS), optical-coherence tomography (OCT), and intravascular MRI (IV-MRI) display plaques at a high spatial resolution. Near-infrared spectroscopy (NIRS) allows for the detection of chemical components of atherosclerotic plaques. In this review, we describe state-of-the-art non-invasive and invasive imaging modalities and stress the combination of their advantages to identify vulnerable plaque features.
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Affiliation(s)
- Csilla Celeng
- MTA-SE Cardiovascular Imaging Research Group, Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Richard A P Takx
- Cardiac MR PET CT Program, Division of Cardiovascular Imaging, Massachusetts General Hospital and Harvard Medical School, Boston, MA; Department of Radiology, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Maros Ferencik
- Knight Cardiovascular Institute, Oregon Health and Science University, Portland, OR
| | - Pál Maurovich-Horvat
- MTA-SE Cardiovascular Imaging Research Group, Heart and Vascular Center, Semmelweis University, Budapest, Hungary.
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23
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Optimal boundary detection method and window settings for coronary atherosclerotic plaque volume analysis in coronary computed tomography angiography: comparison with intravascular ultrasound. Eur Radiol 2015; 26:3190-8. [DOI: 10.1007/s00330-015-4121-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2015] [Revised: 11/13/2015] [Accepted: 11/13/2015] [Indexed: 10/22/2022]
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24
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Jacob SS, Hassan M, Yacoub MH. Utility of mass spectrometry for the diagnosis of the unstable coronary plaque. Glob Cardiol Sci Pract 2015; 2015:25. [PMID: 26535224 PMCID: PMC4614337 DOI: 10.5339/gcsp.2015.25] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Accepted: 04/30/2015] [Indexed: 11/04/2022] Open
Abstract
Mass spectrometry is a powerful technique that is used to identify unknown compounds, to quantify known materials, and to elucidate the structure and chemical properties of molecules. Recent advances in the accuracy and speed of the technology have allowed data acquisition for the global analysis of lipids from complex samples such as blood plasma or serum. Here, mass spectrometry as a tool is described, its limitations explained and its application to biomarker discovery in coronary artery disease is considered. In particular an application of mass spectrometry for the discovery of lipid biomarkers that may indicate plaque morphology that could lead to myocardial infarction is elucidated.
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Affiliation(s)
| | | | - Magdi H Yacoub
- Qatar Cardiovascular Research Centre, Doha, Qatar ; Imperial College, London, United Kingdom
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25
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Maurovich-Horvat P, Tárnoki DL, Tárnoki ÁD, Horváth T, Jermendy ÁL, Kolossváry M, Szilveszter B, Voros V, Kovács A, Molnár AÁ, Littvay L, Lamb HJ, Voros S, Jermendy G, Merkely B. Rationale, Design, and Methodological Aspects of the BUDAPEST-GLOBAL Study (Burden of Atherosclerotic Plaques Study in Twins-Genetic Loci and the Burden of Atherosclerotic Lesions). Clin Cardiol 2015; 38:699-707. [PMID: 26492817 DOI: 10.1002/clc.22482] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Revised: 09/11/2015] [Indexed: 12/18/2022] Open
Abstract
The heritability of coronary atherosclerotic plaque burden, coronary geometry, and phenotypes associated with increased cardiometabolic risk are largely unknown. The primary aim of the Burden of Atherosclerotic Plaques Study in Twins-Genetic Loci and the Burden of Atherosclerotic Lesions (BUDAPEST-GLOBAL) study is to evaluate the influence of genetic and environmental factors on the burden of coronary artery disease. By design this is a prospective, single-center, classical twin study. In total, 202 twins (61 monozygotic pairs, 40 dizygotic same-sex pairs) were enrolled from the Hungarian Twin Registry database. All twins underwent non-contrast-enhanced computed tomography (CT) for the detection and quantification of coronary artery calcium and for the measurement of epicardial fat volumes. In addition, a single non-contrast-enhanced image slice was acquired at the level of L3-L4 to assess abdominal fat distribution. Coronary CT angiography was used for the detection and quantification of plaque, stenosis, and overall coronary artery disease burden. For the primary analysis, we will assess the presence and volume of atherosclerotic plaques. Furthermore, the 3-dimensional coronary geometry will be assessed based on the coronary CT angiography datasets. Additional phenotypic analyses will include per-patient epicardial and abdominal fat quantity measurements. Measurements obtained from monozygotic and dizygotic twin pairs will be compared to evaluate the genetic or environmental effects of the given phenotype. The BUDAPEST-GLOBAL study provides a unique framework to shed some light on the genetic and environmental influences of cardiometabolic disorders.
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Affiliation(s)
- Pál Maurovich-Horvat
- MTA-SE Cardiovascular Imaging Research Group, Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Dávid L Tárnoki
- Department of Radiology and Oncotherapy, Semmelweis University, Budapest, Hungary
| | - Ádám D Tárnoki
- Department of Radiology and Oncotherapy, Semmelweis University, Budapest, Hungary
| | - Tamás Horváth
- Department of Hydrodynamic Systems, Budapest University of Technology and Economics, Budapest, Hungary
| | - Ádám L Jermendy
- MTA-SE Cardiovascular Imaging Research Group, Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Márton Kolossváry
- MTA-SE Cardiovascular Imaging Research Group, Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Bálint Szilveszter
- MTA-SE Cardiovascular Imaging Research Group, Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Viktor Voros
- Scientific Affairs, Global Institute for Research, LLC, Richmond, Virginia
| | - Attila Kovács
- MTA-SE Cardiovascular Imaging Research Group, Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Andrea Á Molnár
- Department of Cardiology, Military Hospital, Budapest, Hungary
| | - Levente Littvay
- Department of Political Science, Central European University, Budapest, Hungary
| | - Hildo J Lamb
- Department of Radiology, Leiden University Medical Center, Leiden, The Netherlands
| | - Szilard Voros
- Scientific Affairs, Global Institute for Research, LLC, Richmond, Virginia
| | - György Jermendy
- Department of Internal Medicine, Bajcsy-Zsilinszky Hospital, Budapest, Hungary
| | - Béla Merkely
- MTA-SE Cardiovascular Imaging Research Group, Heart and Vascular Center, Semmelweis University, Budapest, Hungary
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Sandfort V, Lima JAC, Bluemke DA. Noninvasive Imaging of Atherosclerotic Plaque Progression: Status of Coronary Computed Tomography Angiography. Circ Cardiovasc Imaging 2015; 8:e003316. [PMID: 26156016 DOI: 10.1161/circimaging.115.003316] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The process of coronary artery disease progression is infrequently visualized. Intravascular ultrasound has been used to gain important insights but is invasive and therefore limited to high-risk patients. For low-to-moderate risk patients, noninvasive methods may be useful to quantitatively monitor plaque progression or regression and to understand and personalize atherosclerosis therapy. This review discusses the potential for coronary computed tomography angiography to evaluate the extent and subtypes of coronary plaque. Computed tomographic technology is evolving and image quality of the method approaches the level required for plaque progression monitoring. Methods to quantify plaque on computed tomography angiography are reviewed as well as a discussion of their use in clinical trials. Limitations of coronary computed tomography angiography compared with competing modalities include limited evaluation of plaque subcomponents and incomplete knowledge of the value of the method especially in patients with low-to-moderate cardiovascular risk.
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Affiliation(s)
- Veit Sandfort
- From the Radiology and Imaging Sciences, National Institutes of Health, Bethesda, MD (V.S., D.A.B.); and Department of Radiology (J.A.C.L.) and Cardiology Division, Department of Medicine (J.A.C.L.), Johns Hopkins University, Baltimore, MD
| | - Joao A C Lima
- From the Radiology and Imaging Sciences, National Institutes of Health, Bethesda, MD (V.S., D.A.B.); and Department of Radiology (J.A.C.L.) and Cardiology Division, Department of Medicine (J.A.C.L.), Johns Hopkins University, Baltimore, MD
| | - David A Bluemke
- From the Radiology and Imaging Sciences, National Institutes of Health, Bethesda, MD (V.S., D.A.B.); and Department of Radiology (J.A.C.L.) and Cardiology Division, Department of Medicine (J.A.C.L.), Johns Hopkins University, Baltimore, MD.
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Karády J, Drobni ZD, Kolossváry M, Maurovich-Horvat P. Non-invasive Assessment of Coronary Plaque Morphology. CURRENT RADIOLOGY REPORTS 2015. [DOI: 10.1007/s40134-015-0117-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Coronary computed tomography angiography for the assessment of chest pain: current status and future directions. Int J Cardiovasc Imaging 2015; 31 Suppl 2:125-43. [DOI: 10.1007/s10554-015-0698-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Accepted: 06/22/2015] [Indexed: 02/02/2023]
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Zhao L, Plank F, Kummann M, Burghard P, Klauser A, Dichtl W, Feuchtner G. Improved non-calcified plaque delineation on coronary CT angiography by sonogram-affirmed iterative reconstruction with different filter strength and relationship with BMI. Cardiovasc Diagn Ther 2015; 5:104-12. [PMID: 25984450 DOI: 10.3978/j.issn.2223-3652.2015.03.06] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Accepted: 03/13/2015] [Indexed: 01/25/2023]
Abstract
PURPOSE To prospectively compare non-calcified plaque delineation and image quality of coronary computed tomography angiography (CCTA) obtained with sinogram-affirmed iterative reconstruction (IR) with different filter strengths and filtered back projection (FBP). METHODS A total of 57 patients [28.1% females; body mass index (BMI) 29.2±6.5 kg/m(2)] were investigated. CCTA was performed using 128-slice dual-source CT. Images were reconstructed with standard FBP and sinogram-affirmed IR using different filter strength (IR-2, IR-3, IR-4) (SAFIRE, Siemens, Germany). Image quality of CCTA and a non-calcified plaque outer border delineation score were evaluated by using a 5-scale score: from 1= poor to 5= excellent. Image noise, contrast-to-noise ratio (CNR) of aortic root, left main (LM) and right coronary artery, and the non-calcified plaque delineation were quantified and compared among the 4 image reconstructions, and were compared between different BMI groups (BMI <28 and ≥28). Statistical analyses included one-way analysis of variance (ANOVA), least significant difference (LSD) and Kruskal-Wallis test. RESULTS There were 71.9% patients in FBP, 96.5% in IR-2, 96.5% in IR-3 and 98.2% in IR-4 who had overall CCTA image quality ≥3, and there were statistical differences in CCTA exam image quality score among those groups, respectively (P<0.001). Sixty-one non-calcified plaques were detected by IR-2 to IR-4, out of those 11 (18%) were missed by FBP. Plaque delineation score increased constantly from FBP (2.7±0.4) to IR-2 (3.2±0.3), to IR-3 (3.5±0.3) up to IR-4 (4.0±0.4), while CNRs of the non-calcifying plaque increased and image noise decreased, respectively. Similarly, CNR of aortic root, LM and right coronary artery improved and image noise declined from FBP to IR-2, IR-3 and IR-4. There were no significant differences of image quality and plaque delineation score between low and high BMI groups within same reconstruction (all P>0.05). Significant differences in image quality and plaque delineation scores among different image reconstructions both in low and high BMI groups (all P<0.001) were found. I4f revealed the highest image quality and plaque delineation score. CONCLUSIONS IR offers improved image quality and non-calcified plaque delineation as compared with FBP, especially if BMI is increasing. Importantly, 18% of non-calcified plaques were missed with FBP. IR-4 shows the best image quality score and plaque delineation score among the different IR-filter strength.
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Affiliation(s)
- Lei Zhao
- 1 Beijing Anzhen Hospital, Capital Medical University, Department of Radiology, Chaoyang District, Beijing 100029, China ; 2 Innsbruck Medical University, Department of Radiology, 3 Innsbruck Medical University, Department of Cardiology, Innrain 52, Christoph-Probst-Platz, 6020 Innsbruck, Tyrol, Austria
| | - Fabian Plank
- 1 Beijing Anzhen Hospital, Capital Medical University, Department of Radiology, Chaoyang District, Beijing 100029, China ; 2 Innsbruck Medical University, Department of Radiology, 3 Innsbruck Medical University, Department of Cardiology, Innrain 52, Christoph-Probst-Platz, 6020 Innsbruck, Tyrol, Austria
| | - Moritz Kummann
- 1 Beijing Anzhen Hospital, Capital Medical University, Department of Radiology, Chaoyang District, Beijing 100029, China ; 2 Innsbruck Medical University, Department of Radiology, 3 Innsbruck Medical University, Department of Cardiology, Innrain 52, Christoph-Probst-Platz, 6020 Innsbruck, Tyrol, Austria
| | - Philipp Burghard
- 1 Beijing Anzhen Hospital, Capital Medical University, Department of Radiology, Chaoyang District, Beijing 100029, China ; 2 Innsbruck Medical University, Department of Radiology, 3 Innsbruck Medical University, Department of Cardiology, Innrain 52, Christoph-Probst-Platz, 6020 Innsbruck, Tyrol, Austria
| | - Andrea Klauser
- 1 Beijing Anzhen Hospital, Capital Medical University, Department of Radiology, Chaoyang District, Beijing 100029, China ; 2 Innsbruck Medical University, Department of Radiology, 3 Innsbruck Medical University, Department of Cardiology, Innrain 52, Christoph-Probst-Platz, 6020 Innsbruck, Tyrol, Austria
| | - Wolfgang Dichtl
- 1 Beijing Anzhen Hospital, Capital Medical University, Department of Radiology, Chaoyang District, Beijing 100029, China ; 2 Innsbruck Medical University, Department of Radiology, 3 Innsbruck Medical University, Department of Cardiology, Innrain 52, Christoph-Probst-Platz, 6020 Innsbruck, Tyrol, Austria
| | - Gudrun Feuchtner
- 1 Beijing Anzhen Hospital, Capital Medical University, Department of Radiology, Chaoyang District, Beijing 100029, China ; 2 Innsbruck Medical University, Department of Radiology, 3 Innsbruck Medical University, Department of Cardiology, Innrain 52, Christoph-Probst-Platz, 6020 Innsbruck, Tyrol, Austria
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Schlett CL, Hoffmann U, Geisler T, Nikolaou K, Bamberg F. Cardiac computed tomography for the evaluation of the acute chest pain syndrome: state of the art. Radiol Clin North Am 2015; 53:297-305. [PMID: 25726995 DOI: 10.1016/j.rcl.2014.11.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Coronary computed tomography angiography (CCTA) is recommended for the triage of acute chest pain in patients with a low-to-intermediate likelihood for acute coronary syndrome. Absence of coronary artery disease (CAD) confirmed by CCTA allows rapid emergency department discharge. This article shows that CCTA-based triage is as safe as traditional triage, reduces the hospital length of stay, and may provide cost-effective or even cost-saving care.
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Affiliation(s)
- Christopher L Schlett
- Department of Diagnostic and Interventional Radiology, University Hospital Heidelberg, Im Neuenheimer Feld 110, Heidelberg 69120, Germany; Cardiac MR PET CT Program, Massachusetts General Hospital, Harvard Medical School, 165 Cambridge St, Suite 400, Boston, MA 02114, USA
| | - Udo Hoffmann
- Cardiac MR PET CT Program, Massachusetts General Hospital, Harvard Medical School, 165 Cambridge St, Suite 400, Boston, MA 02114, USA
| | - Tobias Geisler
- Department of Cardiology and Cardiovascular Medicine University Hospital of Tübingen, Hoppe-Seyler-Straβe 3, Tübingen 72076, Germany
| | - Konstantin Nikolaou
- Department of Diagnostic and Interventional Radiology, University Hospital of Tübingen, Hoppe-Seyler-Straβe 3, Tübingen 72076, Germany
| | - Fabian Bamberg
- Cardiac MR PET CT Program, Massachusetts General Hospital, Harvard Medical School, 165 Cambridge St, Suite 400, Boston, MA 02114, USA; Department of Diagnostic and Interventional Radiology, University Hospital of Tübingen, Hoppe-Seyler-Straβe 3, Tübingen 72076, Germany.
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Seifarth H, Schlett CL, Lehman SJ, Bamberg F, Donnelly P, Januzzi JL, Koenig W, Truong QA, Hoffmann U. Correlation of concentrations of high-sensitivity troponin T and high-sensitivity C-reactive protein with plaque progression as measured by CT coronary angiography. J Cardiovasc Comput Tomogr 2014; 8:452-8. [PMID: 25467832 PMCID: PMC4487607 DOI: 10.1016/j.jcct.2014.09.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2014] [Revised: 08/28/2014] [Accepted: 09/03/2014] [Indexed: 11/20/2022]
Abstract
BACKGROUND Elevated levels of inflammatory biomarkers are associated with increased cardiovascular morbidity and mortality. OBJECTIVE We sought to determine whether elevated concentrations of high-sensitivity troponin T (hs-TnT) and high-sensitivity C-reactive protein (hs-CRP) predict progression of coronary artery disease (CAD) as determined by coronary CT angiography (coronary CTA). METHODS Patients presenting to the emergency department with acute chest pain who initially showed no evidence of an acute coronary syndrome underwent baseline and follow-up coronary CTA (median follow-up, 23.9 months) using identical acquisition and reconstruction parameters. Coronary CTA data of each major coronary artery were co-registered. Cross-sections were assessed for the presence of calcified and noncalcified plaques. Progression of atherosclerotic plaque and change of plaque composition from noncalcified to calcified plaque was evaluated and correlated to levels of hs-TnT and hs-CRP at the time of the baseline CT. RESULTS Fifty-four patients (mean age, 54.1 years; 59% male) were included, and 6775 cross-sections were compared. CAD was detected in 12.2 ± 21.2 cross-sections per patient at baseline. Prevalence of calcified plaque increased by 1.5 ± 2.4 slices per patient (P < .0001) over the follow-up period. On average, 1.6 ± 3.6 slices with new noncalcified plaque were found per patient (P < .0001) and 0.7 ± 1.7 slices with pre-existing noncalcified plaque had progressed to calcified plaque (P < .0001). After multivariate adjustment, change of overall CAD burden was predicted by baseline hs-TnT and hs-CRP (r = 0.29; P = .039 and r = 0.40; P = .004). Change of plaque composition was associated with baseline hs-TnT (r = 0.29; P = .03). CONCLUSION Concentrations of hs-TnT and hs-CRP are weakly associated with a significant increase in CAD burden and change in plaque composition over 24 months independent of baseline risk factors.
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Affiliation(s)
- Harald Seifarth
- Cardiac MR PET CT Program, Massachusetts General Hospital and Harvard Medical School, 165 Cambridge Street, Boston, MA 02114, USA; Department of Diagnostic and Interventional Radiology, Esslingen Hospital, Esslingen, Germany
| | - Christopher L Schlett
- Cardiac MR PET CT Program, Massachusetts General Hospital and Harvard Medical School, 165 Cambridge Street, Boston, MA 02114, USA; Department of Diagnostic and Interventional Radiology, University Hospital Heidelberg, Germany
| | - Sam J Lehman
- Cardiac MR PET CT Program, Massachusetts General Hospital and Harvard Medical School, 165 Cambridge Street, Boston, MA 02114, USA
| | - Fabian Bamberg
- Cardiac MR PET CT Program, Massachusetts General Hospital and Harvard Medical School, 165 Cambridge Street, Boston, MA 02114, USA
| | - Patrick Donnelly
- Cardiac MR PET CT Program, Massachusetts General Hospital and Harvard Medical School, 165 Cambridge Street, Boston, MA 02114, USA
| | - James L Januzzi
- Division of Cardiology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
| | - Wolfgang Koenig
- Department of Internal Medicine II and Cardiology, University of Ulm Medical Center, Ulm, Germany
| | - Quynh A Truong
- Cardiac MR PET CT Program, Massachusetts General Hospital and Harvard Medical School, 165 Cambridge Street, Boston, MA 02114, USA; Division of Cardiology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
| | - Udo Hoffmann
- Cardiac MR PET CT Program, Massachusetts General Hospital and Harvard Medical School, 165 Cambridge Street, Boston, MA 02114, USA.
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Boussel L, Coulon P, Thran A, Roessl E, Martens G, Sigovan M, Douek P. Photon counting spectral CT component analysis of coronary artery atherosclerotic plaque samples. Br J Radiol 2014; 87:20130798. [PMID: 24874766 DOI: 10.1259/bjr.20130798] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVE To evaluate the capabilities of photon counting spectral CT to differentiate components of coronary atherosclerotic plaque based on differences in spectral attenuation and iodine-based contrast agent concentration. METHODS 10 calcified and 13 lipid-rich non-calcified histologically demonstrated atheromatous plaques from post-mortem human coronary arteries were scanned with a photon counting spectral CT scanner. Individual photons were counted and classified in one of six energy bins from 25 to 70 keV. Based on a maximum likelihood approach, maps of photoelectric absorption (PA), Compton scattering (CS) and iodine concentration (IC) were reconstructed. Intensity measurements were performed on each map in the vessel wall, the surrounding perivascular fat and the lipid-rich and the calcified plaques. PA and CS values are expressed relative to pure water values. A comparison between these different elements was performed using Kruskal-Wallis tests with pairwise post hoc Mann-Whitney U-tests and Sidak p-value adjustments. RESULTS RESULTS for vessel wall, surrounding perivascular fat and lipid-rich and calcified plaques were, respectively, 1.19 ± 0.09, 0.73 ± 0.05, 1.08 ± 0.14 and 17.79 ± 6.70 for PA; 0.96 ± 0.02, 0.83 ± 0.02, 0.91 ± 0.03 and 2.53 ± 0.63 for CS; and 83.3 ± 10.1, 37.6 ± 8.1, 55.2 ± 14.0 and 4.9 ± 20.0 mmol l(-1) for IC, with a significant difference between all tissues for PA, CS and IC (p < 0.012). CONCLUSION This study demonstrates the capability of energy-sensitive photon counting spectral CT to differentiate between calcifications and iodine-infused regions of human coronary artery atherosclerotic plaque samples by analysing differences in spectral attenuation and iodine-based contrast agent concentration. ADVANCES IN KNOWLEDGE Photon counting spectral CT is a promising technique to identify plaque components by analysing differences in iodine-based contrast agent concentration, photoelectric attenuation and Compton scattering.
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Affiliation(s)
- L Boussel
- 1 Department of Radiology, CREATIS, UMR CNRS 5515, INSERM U1044, Croix-Rousse Hospital, Lyon, France
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Maurovich-Horvat P, Ferencik M, Voros S, Merkely B, Hoffmann U. Comprehensive plaque assessment by coronary CT angiography. Nat Rev Cardiol 2014; 11:390-402. [PMID: 24755916 DOI: 10.1038/nrcardio.2014.60] [Citation(s) in RCA: 250] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Most acute coronary syndromes are caused by sudden luminal thrombosis due to atherosclerotic plaque rupture or erosion. Preventing such an event seems to be the only effective strategy to reduce mortality and morbidity of coronary heart disease. Coronary lesions prone to rupture have a distinct morphology compared with stable plaques, and provide a unique opportunity for noninvasive imaging to identify vulnerable plaques before they lead to clinical events. The submillimeter spatial resolution and excellent image quality of modern computed tomography (CT) scanners allow coronary atherosclerotic lesions to be detected, characterized, and quantified. Large plaque volume, low CT attenuation, napkin-ring sign, positive remodelling, and spotty calcification are all associated with a high risk of acute cardiovascular events in patients. Computation fluid dynamics allow the calculation of lesion-specific endothelial shear stress and fractional flow reserve, which add functional information to plaque assessment using CT. The combination of morphologic and functional characteristics of coronary plaques might enable noninvasive detection of vulnerable plaques in the future.
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Affiliation(s)
- Pál Maurovich-Horvat
- MTA-SE Lendület Cardiovascular Imaging Research Group, Heart and Vascular Centre, Semmelweis University, 68 Varosmajor ut, 1025 Budapest, Hungary
| | - Maros Ferencik
- Cardiac MR PET CT Program, Division of Cardiology and Department of Radiology, Massachusetts General Hospital, Harvard Medical School, 165 Cambridge Street, Suite 400, Boston, MA 02114. USA
| | - Szilard Voros
- Stony Brook University, 101 Nicolls Road, Stony Brook, NY 11794 USA
| | - Béla Merkely
- MTA-SE Lendület Cardiovascular Imaging Research Group, Heart and Vascular Centre, Semmelweis University, 68 Varosmajor ut, 1025 Budapest, Hungary
| | - Udo Hoffmann
- Cardiac MR PET CT Program, Division of Cardiology and Department of Radiology, Massachusetts General Hospital, Harvard Medical School, 165 Cambridge Street, Suite 400, Boston, MA 02114. USA
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Weininger M, Renker M, Rowe GW, Abro JA, Costello P, Schoepf UJ. Integrative computed tomographic imaging of coronary artery disease. Expert Rev Cardiovasc Ther 2014; 9:27-43. [DOI: 10.1586/erc.10.166] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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3D reconstruction techniques of human coronary bifurcations for shear stress computations. J Biomech 2013; 47:39-43. [PMID: 24215669 DOI: 10.1016/j.jbiomech.2013.10.021] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2013] [Accepted: 10/12/2013] [Indexed: 01/15/2023]
Abstract
BACKGROUND Heterogeneity in plaque composition in human coronary artery bifurcations is associated with blood flow induced shear stress. Shear stress is generally determined by combing 3D lumen data and computational fluid dynamics (CFD). We investigated two new procedures to generate 3D lumen reconstructions of coronary artery bifurcations for shear stress computations. METHODS We imaged 10 patients with multislice computer tomography (MSCT) and intravascular ultrasound (IVUS). The 3D reconstruction of the main branch was based on the fusion of MSCT and IVUS. The proximal part of side branch was reconstructed using IVUS data or MSCT data, resulting in two different reconstructions of the bifurcation region. The distal part of the side branch was based on MSCT data alone. The reconstructed lumen was combined with CFD to determine the shear stress. Low and high shear stress regions were defined and shear stress patterns in the bifurcation regions were investigated. RESULTS The 3D coronary bifurcations were successfully generated with both reconstruction procedures. The geometrical features of the bifurcation region for the two reconstruction procedures did not reveal appreciable differences. The shear stress maps showed a qualitative agreement, and the low and high shear stress regions were similar in size and average shear stress values were identical. The low and high shear stress regions showed an overlap of approximately 75%. CONCLUSION Reconstruction of the side branch with MSCT data alone is an adequate technique to study shear stress and wall thickness in the bifurcation region. The reconstruction procedure can be applied to further investigate the effect of shear stress on atherosclerosis in coronary bifurcations.
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Stenosis quantification of coronary arteries in coronary vessel phantoms with second-generation dual-source CT: influence of measurement parameters and limitations. AJR Am J Roentgenol 2013; 201:W227-34. [PMID: 23883237 DOI: 10.2214/ajr.12.9453] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
OBJECTIVE The purpose of this study was to use second-generation dual-source CT to assess the influence of size, degree of stenosis, luminal contrast attenuation, and plaque geometry on stenosis quantification in a coronary artery phantom. MATERIALS AND METHODS Six vessel phantoms with three outer diameters (2, 3, and 4 mm), each containing three radiolucent plaques (72.2 HU) that simulated eccentric and concentric 43.8%, 75%, and 93.8% stenoses were made with a 3D printer system. These phantoms were filled with an iodine-saline solution mixture at luminal attenuations of 150, 200, 250, 300, and 350 HU and were attached to a cardiac motion simulator. Dual-source CT was performed with a standardized ECG-gated protocol (120 kV, 360 mAs per rotation) at a simulated heart rate of 70 beats/min. Two independent readers quantified the degree of stenosis using area-based measurements. RESULTS All measurements were highly reproducible (intraclass correlation, ≥ 0.791; p < 0.001). The mean measured degree of stenosis for a phantom with a 3-mm outer diameter at 250-HU luminal attenuation was 49.0% ± 10.0% for 43.8% stenosis, 71.7% ± 9.6% for 75.0% stenosis, and 85.4% ± 5.9% for 93.8% stenosis. With decreasing phantom size, measurement error increased for all degrees of stenosis. The absolute error increased for measurements at a low luminal attenuation of 150 HU (p < 0.001) and for low-grade stenoses compared with medium-and high-grade stenoses (p < 0.001). CONCLUSION The results are an overview of factors that influence stenosis quantification in simulated coronary arteries. Dual-source CT is highly reproducible and accurate for quantification of low-density stenosis in vessels with a diameter of 3 mm and attenuation of at least 200 HU for different degrees of stenosis and plaque geometry.
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Schlett CL, Ferencik M, Celeng C, Maurovich-Horvat P, Scheffel H, Stolzmann P, Do S, Kauczor HU, Alkadhi H, Bamberg F, Hoffmann U. How to assess non-calcified plaque in CT angiography: delineation methods affect diagnostic accuracy of low-attenuation plaque by CT for lipid-core plaque in histology. Eur Heart J Cardiovasc Imaging 2013; 14:1099-105. [PMID: 23671211 DOI: 10.1093/ehjci/jet030] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
AIMS To compare the accuracy of two plaque delineation methods for coronary computed tomographic angiography (CTA) to identify lipid-core plaque (LCP) using histology as the reference standard. METHODS AND RESULTS Five ex vivo hearts were analysed by CTA and histology. LCP was defined by histology as fibroatheroma with core diameter/circumference >200 μm/>60° and cap thickness <450 μm. In CTA, plaque was manually delineated either as the difference between the inner and outer vessel walls (Method A) or as a direct tracing of plaque (Method B). Low-attenuation plaque was defined as an area with <90 Hounsfield units. Of 446 co-registered cross-sections, 55 (12%) contained LCP. In CTA, low-attenuation plaque area was larger as assessed with Method A compared with Method B (difference: 120 ± 60%). Although low-attenuation plaque was associated with the presence of LCP, the delineation Method B yielded higher diagnostic accuracy than Method A [area under the curve (AUC): 0.831 vs. 0.780, respectively, P = 0.005]. After excluding 'normal' cross-sections by CTA (n = 117), AUC for detecting LCP became similar between both methods (0.767 vs. 0.729, P = 0.07, respectively). CONCLUSION Low-attenuation plaque in CTA is a diagnostic tool for LCP but prone to error if plaque is defined as the area between the inner and outer vessel walls and normal cross-sections are included in the assessment.
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Affiliation(s)
- Christopher L Schlett
- Cardiac MR PET CT Program, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
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Schlett CL, Truong QA, Ahmed W, Blankstein R, Ferencik M, Uthamalingam S, Bamberg F, Koenig W, Januzzi JL, Hoffmann U. High-sensitivity troponin T and C-reactive protein to identify patients without cardiac structural and functional abnormalities as assessed by cardiac CT and SPECT imaging: can biomarkers predict cardiac health? Int J Cardiovasc Imaging 2013; 29:865-73. [PMID: 23274882 PMCID: PMC7034792 DOI: 10.1007/s10554-012-0164-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/23/2012] [Accepted: 11/27/2012] [Indexed: 01/01/2023]
Abstract
While high-sensitivity troponin-T (hsTnT) and C-reactive protein (hsCRP) are associated with structural heart disease, we thought to determine whether biomarkers can predict which heart is healthy based on multimodality imaging. Patients from the emergency department with acute chest pain suggestive of acute coronary syndrome undergoing contrast enhanced cardiac CT and stress single photon emission computed tomography (SPECT) myocardial perfusion imaging were included. HsTnT and hsCRP were assessed at time of CT. Imaging data were assessed for coronary atherosclerosis, left ventricular hypertrophy/dysfunction and myocardial perfusion abnormalities. Patients were stratified into those with or without any cardiac findings, who were considered as cardiac healthy. For biomarkers, low cut-off corresponding to good specificity and high cut-off corresponding to good sensitivity for cardiac health were derived. Among 117 patients (52 years, 55 % male), 42 (36 %) were cardiac healthy based on cardiac CT and SPECT imaging. These patients had significantly lower hsTnT and hsCRP levels as compared to those with functional or structural abnormalities (3.58 vs. 5.63 ng/L, p = 0.002; 0.82 vs. 1.93 mg/L, p = 0.0005; respectively). Patients with both low hsTnT (<3.00 ng/L) and hsCRP (<0.45 mg/L) had a probability of 85 % for being cardiac healthy. In contrast, patients with high hsTnT (>7.00 ng/L) and hsCRP (>2.00 mg/L) had 8 % probability for being cardiac healthy. Discriminative capacity of a dual-biomarker strategy was significantly improved as compared to hsTnT or hsCRP alone or to Framingham Risk score (AUC: 0.781 vs. 0.691; vs. 0.678; vs. 0.649; all p ≤ 0.02, respectively). A dual-biomarker strategy of hsTnT and hsCRP is highly discriminative for patients with normal cardiac structure and function and provides incremental value beyond the Framingham risk score.
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Affiliation(s)
- Christopher L Schlett
- Cardiac MR PET CT Program, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, 165 Cambridge Street, Suite 400, Boston, MA 02114, USA.
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Gijsen F, van der Giessen A, van der Steen A, Wentzel J. Shear stress and advanced atherosclerosis in human coronary arteries. J Biomech 2013; 46:240-7. [DOI: 10.1016/j.jbiomech.2012.11.006] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2012] [Accepted: 11/01/2012] [Indexed: 12/15/2022]
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Weininger M, Schoepf UJ, Ramachandra A, Fink C, Rowe GW, Costello P, Henzler T. Adenosine-stress dynamic real-time myocardial perfusion CT and adenosine-stress first-pass dual-energy myocardial perfusion CT for the assessment of acute chest pain: Initial results. Eur J Radiol 2012; 81:3703-10. [PMID: 21194865 DOI: 10.1016/j.ejrad.2010.11.022] [Citation(s) in RCA: 101] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2010] [Accepted: 11/17/2010] [Indexed: 11/17/2022]
Affiliation(s)
- Markus Weininger
- Medical University of South Carolina, Department of Radiology and Radiological Science, Charleston, SC, USA
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Maurovich-Horvat P, Schlett CL, Alkadhi H, Nakano M, Stolzmann P, Vorpahl M, Scheffel H, Tanaka A, Warger WC, Maehara A, Ma S, Kriegel MF, Kaple RK, Seifarth H, Bamberg F, Mintz GS, Tearney GJ, Virmani R, Hoffmann U. Differentiation of early from advanced coronary atherosclerotic lesions: systematic comparison of CT, intravascular US, and optical frequency domain imaging with histopathologic examination in ex vivo human hearts. Radiology 2012; 265:393-401. [PMID: 23012461 DOI: 10.1148/radiol.12111891] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
PURPOSE To establish an ex vivo experimental setup for imaging coronary atherosclerosis with coronary computed tomographic (CT) angiography, intravascular ultrasonography (US), and optical frequency domain imaging (OFDI) and to investigate their ability to help differentiate early from advanced coronary plaques. MATERIALS AND METHODS All procedures were performed in accordance with local and federal regulations and the Declaration of Helsinki. Approval of the local Ethics Committee was obtained. Overall, 379 histologic cuts from nine coronary arteries from three donor hearts were acquired, coregistered among modalities, and assessed for the presence and composition of atherosclerotic plaque. To assess the discriminatory capacity of the different modalities in the detection of advanced lesions, c statistic analysis was used. Interobserver agreement was assessed with the Cohen κ statistic. RESULTS Cross sections without plaque at coronary CT angiography and with fibrous plaque at OFDI almost never showed advanced lesions at histopathologic examination (odds ratio [OR]: 0.02 and 0.06, respectively; both P<.0001), while mixed plaque at coronary CT angiography, calcified plaque at intravascular US, and lipid-rich plaque at OFDI were associated with advanced lesions (OR: 2.49, P=.0003; OR: 2.60, P=.002; and OR: 31.2, P<.0001, respectively). OFDI had higher accuracy for discriminating early from advanced lesions than intravascular US and coronary CT angiography (area under the receiver operating characteristic curve: 0.858 [95% confidence interval {CI}: 0.802, 0.913], 0.631 [95% CI: 0.554, 0.709], and 0.679 [95% CI: 0.618, 0.740]; respectively, P<.0001). Interobserver agreement was excellent for OFDI and coronary CT angiography (κ=0.87 and 0.85, respectively) and was good for intravascular US (κ=0.66). CONCLUSION Systematic and standardized comparison between invasive and noninvasive modalities for coronary plaque characterization in ex vivo specimens demonstrated that coronary CT angiography and intravascular US are reasonably associated with plaque composition and lesion grading according to histopathologic findings, while OFDI was strongly associated. These data may help to develop initial concepts of sequential imaging strategies to identify patients with advanced coronary plaques.
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Affiliation(s)
- Pál Maurovich-Horvat
- Cardiac MR PET CT Program of the Department of Radiology, Cardiology Division, and Wellman Center for Photomedicine, Massachusetts General Hospital and Harvard Medical School, 165 Cambridge St, Suite 400, Boston, MA 02114, USA
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Stolzmann P, Schlett CL, Maurovich-Horvat P, Maehara A, Ma S, Scheffel H, Engel LC, Károlyi M, Mintz GS, Hoffmann U. Variability and accuracy of coronary CT angiography including use of iterative reconstruction algorithms for plaque burden assessment as compared with intravascular ultrasound—an ex vivo study. Eur Radiol 2012; 22:2067-75. [DOI: 10.1007/s00330-012-2464-8] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2011] [Revised: 02/27/2012] [Accepted: 03/08/2012] [Indexed: 11/30/2022]
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Schuhbäck A, Marwan M, Gauss S, Muschiol G, Ropers D, Schneider C, Lell M, Rixe J, Hamm C, Daniel WG, Achenbach S. Interobserver agreement for the detection of atherosclerotic plaque in coronary CT angiography: comparison of two low-dose image acquisition protocols with standard retrospectively ECG-gated reconstruction. Eur Radiol 2012; 22:1529-36. [DOI: 10.1007/s00330-012-2389-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2011] [Revised: 12/11/2011] [Accepted: 12/24/2011] [Indexed: 01/09/2023]
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Stolzmann P, Subramanian S, Abdelbaky A, Maurovich-Horvat P, Scheffel H, Tawakol A, Hoffmann U. Complementary Value of Cardiac FDG PET and CT for the Characterization of Atherosclerotic Disease. Radiographics 2011; 31:1255-69. [DOI: 10.1148/rg.315115028] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Detection and quantification of coronary atherosclerotic plaque by 64-slice multidetector CT: a systematic head-to-head comparison with intravascular ultrasound. Atherosclerosis 2011; 219:163-70. [PMID: 21802687 DOI: 10.1016/j.atherosclerosis.2011.07.005] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2011] [Revised: 06/08/2011] [Accepted: 07/02/2011] [Indexed: 11/23/2022]
Abstract
OBJECTIVE We evaluated the ability of 64-slice multidetector computed tomography (MDCT)-derived plaque parameters to detect and quantify coronary atherosclerosis, using intravascular ultrasound (IVUS) as the reference standard. METHODS In 32 patients, IVUS and 64-MDCT was performed. The MDCT and IVUS datasets of 44 coronary arteries were co-registered using a newly developed fusion technique and quantitative parameters were derived from both imaging modalities. The threshold of >0.5 mm of maximum wall thickness was used to establish plaque presence on MDCT and IVUS. RESULTS We analyzed 1364 coregistered 1-mm coronary cross-sections and 255 segments of 5-mm length. Compared with IVUS, 64-MDCT enabled correct detection in 957 of 1109 cross-sections containing plaque (sensitivity 86%). In 180 of 255 cross-sections atherosclerosis was correctly excluded (specificity 71%). On the segmental level, MDCT detected 213 of 220 segments with any atherosclerotic plaque (sensitivity 96%), whereas the presence of any plaque was correctly ruled out in 28 of 32 segments (specificity 88%). Interobserver agreement for the detection of atherosclerotic cross-sections was moderate (Cohen's kappa coefficient K=0.51), but excellent for the atherosclerotic segments (K=1.0). Pearson's correlation coefficient for vessel plaque volumes measured by MDCT and IVUS was r=0.91 (p<0.001). Bland-Altman analysis showed a slight non-significant underestimation of any plaque volume by MDCT (p=0.5), with a trend to underestimate noncalcified and overestimate mixed/calcified plaque volumes (p=0.22 and p=0.87 respectively). CONCLUSION MDCT is able to detect and quantify atherosclerotic plaque. Further improvement in CT resolution is necessary for more reliable assessment of very small and distal coronary plaques.
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Young VEL, Degnan AJ, Gillard JH. Advances in contrast media for vascular imaging of atherosclerosis. ACTA ACUST UNITED AC 2011. [DOI: 10.2217/iim.11.23] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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