MR Flow Measurement in the Internal Mammary Artery–to–Coronary Artery Bypass Graft: Comparison with Graft Stenosis at Radiographic Angiography

Ishida, Nobuhiro; Sakuma, Hajime; Cruz, Bayard P.; Shimono, Takatsugu; Tokui, Toshiya; Yada, Isao; Takeda, Kan; Higgins, Charles B.

doi:10.1148/radiology.220.2.r01au16441

Cited by 33 publications

(26 citation statements)

References 24 publications

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“…Excellent correlations in average peak velocity (r ϭ 0.99, P Ͻ .001) and diastolic peak velocity (r ϭ 0.99, P Ͻ .001) were demonstrated in vitro between MR and Doppler flow measurements, with less than 5% interstudy variability. In order to validate the accuracy of MR flow quantification of the coronary artery bypass grafts in patients, the maximal diastolic blood flow velocity in the bypass graft was compared with the diastolic peak velocity measured by using a Doppler guidewire (76). The diastolic peak velocity measured with MRI showed a significant linear correlation with the diastolic peak velocity obtained by using the Doppler guidewire, with a correlation coefficient of 0.78 and slope of 0.85 (P Ͻ .05).…”

Section: Mr Flow Measurement In Coronary Circulationmentioning

confidence: 99%

Magnetic resonance imaging for ischemic heart disease

Sakuma

2007

Magnetic Resonance Imaging

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Cardiac MRI has long been recognized as an accurate and reliable means of evaluating cardiac anatomy and ventricular function. Considerable progress has been made in the field of cardiac MRI, and cardiac MRI can provide accurate evaluation of myocardial ischemia and infarction (MI). Late gadolinium (Gd)-enhanced MRI can clearly delineate subendocardial infarction, and the assessment of transmural extent of infarction on late enhanced MRI has been shown to be useful in predicting functional recovery of dysfunctional myocardium in patients after MI. Stress first-pass contrast-enhanced (CE) myocardial perfusion MRI can be used to detect subendocardial ischemia, and recent studies have demonstrated the high diagnostic accuracy of stress myocardial perfusion MRI for detecting significant coronary artery disease (CAD). Free-breathing, whole-heart coronary MR angiography (MRA) was recently introduced as a method that can provide visualization of all three major coronary arteries within a single three-dimensional (3D) acquisition. With further improvements in MRI techniques and the establishment of a standardized study protocol, cardiac MRI will play a pivotal role in managing patients with ischemic heart disease.

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Section: Mr Flow Measurement In Coronary Circulationmentioning

confidence: 99%

Magnetic resonance imaging for ischemic heart disease

Sakuma

2007

Magnetic Resonance Imaging

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“…This has not been previously described, but however, flow volumes in the coronary artery before and after administration of dipyridamole; 7 and flow quantification in internal mammary artery to coronary artery bypass graft have been performed perpendicular to the vessel with velocity-encoded cine MR sequences. 8 …”

Section: ;13:317-321mentioning

confidence: 99%

Coronary Artery Fistula in a Patient with Pulmonary Atresia and Tricuspid Atresia

Puvaneswary

Warner

Pressley

et al. 2004

Heart, Lung and Circulation

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“…The development of higher-speed approaches that acquire images are based on either standard or spiral techniques, each with its advantages and disadvantages. At the present time, clinical application has been useful for the imaging of bypass graft patency and of congenitally anomalous coronary arteries (38)(39)(40). Recent work from Kim et al (41) described an international multicenter trial that demonstrated the present value of coronary artery imaging.…”

Section: Coronary Angiographymentioning

confidence: 99%

Cardiovascular nuclear magnetic resonance: basic and clinical applications

Forder¹,

Pohost²

2003

J. Clin. Invest.

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Felix Bloch (1) at Stanford University and Edward Purcell and his colleagues (2) at Harvard University reported the phenomenon of NMR independently in 1946. As a result, Bloch and Purcell shared the 1952 Nobel Prize in Physics. Between 1950 and 1970, NMR spectroscopy was developed and used to analyze chemical and physical molecular structure. In 1971, Raymond Damadian reported that the NMR relaxation times of tumors differed from those of normal tissue, suggesting for the first time that magnetic resonance (MR) might be used for the detection of disease (3). In 1973, Paul Lauterbur was the first to report that images could be generated by NMR using small test tube samples of water and oil (4). Rather than creating a homogeneous magnet field by adjusting the "shimming" magnets to minimize field inhomogeneity, Lauterbur applied a magnetic field gradient to induce inhomogeneity in a planned way, providing a method to encode different parts of the substance to be imaged. He generated images using a technique analogous to that employed in x-ray computed tomography, known as back-projection-reconstruction. Two years later, Richard Ernst and colleagues proposed using the mathematical operation of Fourier transformation to create a spatial image from the frequencies generated by radiowave excitation within a magnetic field (5). It was an additional five years before Ernst and colleagues' ideas were applied, and they quickly formed the basis of most modern imaging techniques. Supposedly to avoid confusion with nuclear medicine, the clinical NMR imaging tool became known as magnetic resonance imaging (MRI) in the late 1970s. In 1977, Damadian and colleagues demonstrated MRI of the whole body (6). In this same year, Peter Mansfield developed the echo-planar imaging (EPI) technique for high-speed imaging (7). Also in that year, both Jacobus and colleagues (8) and Garlick and associates (9) published the first NMR phosphorus spectra from isolated perfused rat hearts, which paved the way for numerous publications on myocardial high-energy phosphate metabolism in the heart. In 1980 Goldman and his colleagues described the potential applications of NMR imaging in the assessment of the cardiovascular system (10). Many of the predictions made in that paper have gradually approached fruition. Despite the considerably more frequent use of cardiovascular MR (CMR) imaging compared with CMR spectroscopy, currently, there is significant clinical information to be ascertained from molecules in the myocardium that can be detected by clinical spectroscopy. This article will describe the state-of-the-art of imaging and spectroscopy and provide a framework for suggesting the future applications of this formidable technology. NMR spectroscopy and imaging techniquesThere are many approaches available, related to the sequence of radiofrequency pulses and magnetic field gradients, for the generation of clinical images and spectra by NMR. The trend has been toward faster imaging sequences and the reduction of artifacts, while spectroscopy develo...

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MR Flow Measurement in the Internal Mammary Artery–to–Coronary Artery Bypass Graft: Comparison with Graft Stenosis at Radiographic Angiography

Abstract: Fast MR blood flow measurement at baseline is highly useful for predicting significant stenosis in internal mammary arterial grafts.

Cited by 33 publications

References 24 publications

Magnetic resonance imaging for ischemic heart disease

Magnetic resonance imaging for ischemic heart disease

Coronary Artery Fistula in a Patient with Pulmonary Atresia and Tricuspid Atresia

Cardiovascular nuclear magnetic resonance: basic and clinical applications

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