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Markus R, Tandon A, Fares M, Dillenbeck J, Greil GF, Batsis M, Greer J, Potersnak A, Zhang S, Hussain T, Avula S. Velocity encoded mitral valve inflow cine: A novel and more reproducible method to determine cardiac rest periods during coronary magnetic resonance angiography. JRSM Cardiovasc Dis 2022; 11:20480040221087556. [PMID: 35342625 PMCID: PMC8943306 DOI: 10.1177/20480040221087556] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 02/23/2022] [Accepted: 02/24/2022] [Indexed: 11/15/2022] Open
Abstract
A high temporal resolution, 4-chamber (4CH) cine is the standard method for determining cardiac rest periods during whole heart coronary magnetic resonance angiography (CMRA). We evaluated the image quality and reproducibility between the 4CH cine method and a novel approach using a velocity encoded mitral valve inflow cine (MVI). The goal of this study was to compare the quality of CMRAs utilizing MVI versus 4CH methods. Sharpness and vessel length for the LCA and RCA using each method were determined using Soap Bubble and two blinded observers independently assessed coronary image quality. Offline analysis on a separate, retrospective cohort (n = 25) was used to compare MVI and 4CH reproducibility. In the prospectively evaluated cohort there was no difference in overall vessel sharpness (4CH vs MVI mean ± SD) (31.0 ± 5.5% vs 30.5 ± 5.7%, p = .63), LCA vessel sharpness (30.0 ± 5.4% vs 31.1 ± 8.2%, p = .44), LCA length (4.7 ± 1.4 cm vs 4.6 ± 1.6 cm, p = .66), RCA vessel sharpness (32.1 ± 6.9% vs 31.1 ± 7.7%, p = .55), RCA length (5.51 ± 2.6 cm vs 5.95 ± 2.4 cm, p = .38), or image quality rating (2.66 vs 2.62, p = .80) between methods. In the retrospective cohort, the MVI method had 5.4% lower inter-observer variability (95% CI 3.7,7.2%, p < .0001) and 3.9% lower intra-observer variability (95% CI 2.4,5.4%, p < .0001) than the 4CH method. MVI is a technically feasible and more reproducible method to determine cardiac rest periods compared to 4CH while preserving vessel sharpness, vessel length & image quality.
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Affiliation(s)
- Richard Markus
- Department of Pediatrics, University of Texas Southwestern Medical Center, Dallas, Texas, USA
- Division of Pediatric Cardiology, Children’s Medical Center Dallas, Dallas, Texas, USA
| | - Animesh Tandon
- Department of Pediatric Cardiology and Director of Cardiovascular Innovation, Cleveland Clinic Children’s Hospital, Cleveland, Ohio, USA
| | - Munes Fares
- Department of Pediatrics, University of Texas Southwestern Medical Center, Dallas, Texas, USA
- Division of Pediatric Cardiology, Children’s Medical Center Dallas, Dallas, Texas, USA
| | - Jeanne Dillenbeck
- Departments of Radiology and Biomedical Engineering, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Gerald F. Greil
- Department of Pediatrics, University of Texas Southwestern Medical Center, Dallas, Texas, USA
- Division of Pediatric Cardiology, Children’s Medical Center Dallas, Dallas, Texas, USA
- Departments of Radiology and Biomedical Engineering, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Maria Batsis
- Department of Pediatrics, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Joshua Greer
- Department of Pediatrics, University of Texas Southwestern Medical Center, Dallas, Texas, USA
- Division of Pediatric Cardiology, Children’s Medical Center Dallas, Dallas, Texas, USA
- Departments of Radiology and Biomedical Engineering, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | | | - Song Zhang
- Department of Clinical Sciences, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Tarique Hussain
- Department of Pediatrics, University of Texas Southwestern Medical Center, Dallas, Texas, USA
- Division of Pediatric Cardiology, Children’s Medical Center Dallas, Dallas, Texas, USA
- Departments of Radiology and Biomedical Engineering, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Sravani Avula
- Department of Pediatrics, University of Texas Southwestern Medical Center, Dallas, Texas, USA
- Division of Pediatric Cardiology, Children’s Medical Center Dallas, Dallas, Texas, USA
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Yoon AJ, Do HP, Cen S, Fong MW, Saremi F, Barr ML, Nayak KS. Assessment of segmental myocardial blood flow and myocardial perfusion reserve by adenosine-stress myocardial arterial spin labeling perfusion imaging. J Magn Reson Imaging 2017; 46:413-420. [DOI: 10.1002/jmri.25604] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Accepted: 12/05/2016] [Indexed: 01/19/2023] Open
Affiliation(s)
- Andrew J. Yoon
- Department of Medicine, Division of Cardiology, Keck School of Medicine of USC; University of Southern California; Los Angeles California USA
| | - Hung Phi Do
- Department of Physics and Astronomy; University of Southern California; Los Angeles California USA
| | - Steven Cen
- Department of Radiology, Keck School of Medicine of USC; University of Southern California; Los Angeles California USA
| | - Michael W. Fong
- Department of Medicine, Division of Cardiology, Keck School of Medicine of USC; University of Southern California; Los Angeles California USA
| | - Farhood Saremi
- Department of Radiology, Keck School of Medicine of USC; University of Southern California; Los Angeles California USA
| | - Mark L. Barr
- Department of Cardiothoracic Surgery, Keck School of Medicine of USC; University of Southern California; Los Angeles California USA
| | - Krishna S. Nayak
- Ming Hsieh Department of Electrical Engineering; University of Southern California; Los Angeles California USA
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Gillis K, Bala G, Roosens B, Remory I, Hernot S, Droogmans S, Cosyns B. Quantification of Calcium Amount in a New Experimental Model: A Comparison between Ultrasound and Computed Tomography. PLoS One 2016; 11:e0148904. [PMID: 26859304 PMCID: PMC4747484 DOI: 10.1371/journal.pone.0148904] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2015] [Accepted: 01/24/2016] [Indexed: 11/18/2022] Open
Abstract
Purpose Calcification is an important prognostic factor in aortic valve stenosis. However, there is no ultrasound (US) method available to accurately quantify calcification in this setting to date. We aimed to validate a new US method for measuring the amount of calcium in an in vitro model, and compare it to computed tomography (CT), the current imaging gold standard. Materials and Methods An agar phantom (2% agar) was made, containing 9 different amounts of calcium-hydroxyapatite Ca5(PO4)3OH (2 to 50mg). The phantoms were imaged with micro-CT and US (10 MHz probe). The calcium area (areacalcium) and its maximum pixel value (PVmax) were obtained. These values were summed to calculate CT and US calcium scores (∑(areacalcium × PVmax)) and volumes (∑areacalcium). Both US- and CT-calcium scores were compared with the calcium amounts, and with each other. Results Both calcium scores correlated significantly with the calcium amount (R2 = 0.9788, p<0.0001 and R2 = 0.8154, p<0.0001 for CT and US respectively). Furthermore, there was a significant correlation between US and CT for calcium volumes (R2 = 0.7392, p<0.0001) and scores (R2 = 0.7391, p<0.0001). Conclusion We developed a new US method that accurately quantifies the amount of calcium in an in vitro model. Moreover it is strongly correlated with CT.
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Affiliation(s)
- Kris Gillis
- In vivo Cellular and Molecular Imaging (ICMI) laboratory, Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel (VUB), Brussels, Belgium
- Centrum voor Hart- en Vaatziekten (CHVZ), Department of Cardiology, Universitair Ziekenhuis Brussel (UZ Brussel), Brussel, Belgium
- * E-mail:
| | - Gezim Bala
- In vivo Cellular and Molecular Imaging (ICMI) laboratory, Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel (VUB), Brussels, Belgium
- Centrum voor Hart- en Vaatziekten (CHVZ), Department of Cardiology, Universitair Ziekenhuis Brussel (UZ Brussel), Brussel, Belgium
| | - Bram Roosens
- In vivo Cellular and Molecular Imaging (ICMI) laboratory, Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel (VUB), Brussels, Belgium
- Centrum voor Hart- en Vaatziekten (CHVZ), Department of Cardiology, Universitair Ziekenhuis Brussel (UZ Brussel), Brussel, Belgium
| | - Isabel Remory
- In vivo Cellular and Molecular Imaging (ICMI) laboratory, Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | - Sophie Hernot
- In vivo Cellular and Molecular Imaging (ICMI) laboratory, Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | - Steven Droogmans
- In vivo Cellular and Molecular Imaging (ICMI) laboratory, Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel (VUB), Brussels, Belgium
- Centrum voor Hart- en Vaatziekten (CHVZ), Department of Cardiology, Universitair Ziekenhuis Brussel (UZ Brussel), Brussel, Belgium
| | - Bernard Cosyns
- In vivo Cellular and Molecular Imaging (ICMI) laboratory, Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel (VUB), Brussels, Belgium
- Centrum voor Hart- en Vaatziekten (CHVZ), Department of Cardiology, Universitair Ziekenhuis Brussel (UZ Brussel), Brussel, Belgium
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Carrascosa P, Deviggiano A, Capunay C, De Zan MC, Goldsmit A, Rodriguez-Granillo GA. Effect of intracycle motion correction algorithm on image quality and diagnostic performance of computed tomography coronary angiography in patients with suspected coronary artery disease. Acad Radiol 2015; 22:81-6. [PMID: 25281361 DOI: 10.1016/j.acra.2014.07.016] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2014] [Revised: 07/23/2014] [Accepted: 07/23/2014] [Indexed: 11/30/2022]
Abstract
RATIONALE AND OBJECTIVES We sought to explore the impact of intracycle motion correction algorithms (MCA) in the interpretability and diagnostic accuracy of computed tomography coronary angiography (CTCA) performed in patients suspected of coronary artery disease (CAD) referred to invasive coronary angiography. MATERIALS AND METHODS Patients with suspected CAD referred to invasive coronary angiography previously underwent CTCA. Patients under rate-control medications were advised to withhold for the previous 24 hours. The primary end point of the study was to evaluate image interpretability and diagnostic performance of MCA compared to conventional reconstructions in patients referred to invasive angiography because of suspected CAD. RESULTS Thirty-five patients were prospectively included in the study protocol. The mean age was 61.4 ± 9.4 years. Twenty-seven (77%) patients were men. A total of 533 coronary segments were evaluated using conventional and MCA reconstructions. MCA reconstructions were associated to higher interpretability rates (525 of 533, 98.5% vs. 515 of 533, 96.6 %; P < .001) and image quality scores (3.88 ± 0.54 vs. 3.78 ± 0.76; P < .0001) compared to conventional reconstructions. Although only mild, a significant difference was observed regarding the diagnostic performance between reconstruction modes, with an area under the curve of 0.90 (0.87-0.92) versus 0.89 (0.86-0.92), respectively, for MCA and conventional reconstructions (P = .0447). CONCLUSIONS In this pilot investigation, MCA reconstructions performed in patients with suspected CAD were associated to higher interpretability rates and image quality scores compared to conventional reconstructions, although only mild differences were observed regarding the diagnostic performance between reconstruction modes.
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Affiliation(s)
- Patricia Carrascosa
- Department of Cardiovascular Imaging, Diagnóstico Maipú, Av Maipú 1668, Vicente López, B1602ABQ Buenos Aires, Argentina; Department of Interventional Cardiology, Sanatorio Guemes, Buenos Aires, Argentina.
| | - Alejandro Deviggiano
- Department of Cardiovascular Imaging, Diagnóstico Maipú, Av Maipú 1668, Vicente López, B1602ABQ Buenos Aires, Argentina; Department of Interventional Cardiology, Sanatorio Guemes, Buenos Aires, Argentina
| | - Carlos Capunay
- Department of Cardiovascular Imaging, Diagnóstico Maipú, Av Maipú 1668, Vicente López, B1602ABQ Buenos Aires, Argentina; Department of Interventional Cardiology, Sanatorio Guemes, Buenos Aires, Argentina
| | - Macarena C De Zan
- Department of Cardiovascular Imaging, Diagnóstico Maipú, Av Maipú 1668, Vicente López, B1602ABQ Buenos Aires, Argentina; Department of Interventional Cardiology, Sanatorio Guemes, Buenos Aires, Argentina
| | - Alejandro Goldsmit
- Department of Cardiovascular Imaging, Diagnóstico Maipú, Av Maipú 1668, Vicente López, B1602ABQ Buenos Aires, Argentina; Department of Interventional Cardiology, Sanatorio Guemes, Buenos Aires, Argentina
| | - Gaston A Rodriguez-Granillo
- Department of Cardiovascular Imaging, Diagnóstico Maipú, Av Maipú 1668, Vicente López, B1602ABQ Buenos Aires, Argentina; Department of Interventional Cardiology, Sanatorio Guemes, Buenos Aires, Argentina
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Do HP, Jao TR, Nayak KS. Myocardial arterial spin labeling perfusion imaging with improved sensitivity. J Cardiovasc Magn Reson 2014; 16:15. [PMID: 24467918 PMCID: PMC3913326 DOI: 10.1186/1532-429x-16-15] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2013] [Accepted: 01/22/2014] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Myocardial arterial spin labeling (ASL) is a noninvasive MRI based technique that is capable of measuring myocardial blood flow (MBF) in humans. It suffers from poor sensitivity to MBF due to high physiological noise (PN). This study aims to determine if the sensitivity of myocardial ASL to MBF can be improved by reducing image acquisition time, via parallel imaging. METHODS Myocardial ASL scans were performed in 7 healthy subjects at rest using flow-sensitive alternating inversion recovery (FAIR) tagging and balanced steady state free precession (SSFP) imaging. Sensitivity encoding (SENSE) with a reduction factor of 2 was used to shorten each image acquisition from roughly 300 ms per heartbeat to roughly 150 ms per heartbeat. A paired Student's t-test was performed to compare measurements of myocardial blood flow (MBF) and physiological noise (PN) from the reference and accelerated methods. RESULTS The measured PN (mean ± standard deviation) was 0.20 ± 0.08 ml/g/min for the reference method and 0.08 ± 0.05 ml/g/min for the accelerated method, corresponding to a 60% reduction. PN measured from the accelerated method was found to be significantly lower than that of the reference method (p=0.0059). There was no significant difference between MBF measured from the accelerated and reference ASL methods (p=0.7297). CONCLUSIONS In this study, significant PN reduction was achieved by shortening the acquisition window using parallel imaging with no significant impact on the measured MBF. This indicates an improvement in sensitivity to MBF and may also enable the imaging of subjects with higher heart rates and imaging during systole.
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Affiliation(s)
- Hung Phi Do
- Department of Physics and Astronomy, University of Southern California, 3740 McClintock Ave, EEB 400, Los Angeles, CA 90089-2564, USA
| | - Terrence R Jao
- Department of Biomedical Engineering, University of Southern California, Los Angeles, CA, USA
| | - Krishna S Nayak
- Ming Hsieh Department of Electrical Engineering, University of Southern California, Los Angeles, CA, USA
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