Adaptive correction of imaging plane position in segmented K‐space cine cardiac MRI

Chuang, Michael L; Chen, Ming Hui; Khasgiwala, Vaibhav C.; McConnell, Michael V.; Edelman, Robert R.; Manning, Warren J.

doi:10.1002/jmri.1880070507

Cited by 28 publications

(17 citation statements)

References 10 publications

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“…In a previous study where a prospective navigator slice correction approach was used to compensate for differences of the diaphragmatic (and cardiac) position between serial breath-holds (Chuang et al, 1997), a significant underestimation of the LV EDV was found. While retrospective ECG-gating may allow decreasing the initial delay of the first phase from the QRS to a minimum, this is not applicable to prospectively ECGgated sequences that implement a trigger delay.…”

Section: Discussionmentioning

confidence: 93%

Relationship of Number of Phases per Cardiac Cycle and Accuracy of Measurement of Left Ventricular Volumes, Ejection Fraction, and Mass

Roussakis

Baras

Seimenis

et al. 2004

J Cardiovasc Magn Reson

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In cine cardiac magnetic resonance imaging (MRI) studies, for any preset imaging parameters the number of phases per cardiac cycle for a single slice is proportional to breath-hold duration. We investigated the relationship between the accuracy of measurement of left ventricular (LV) end-diastolic and end-systolic volumes (EDV and ESV, respectively), mass and ejection fraction (EF), and the number of phases acquired per cardiac cycle. Twelve adult volunteers underwent cardiac MRI and five complete LV functional studies were obtained with 8, 11, 14, 17, and 20 phases per cardiac cycle. We calculated LV volumes, EF, and mass for each acquisition, and compared them using the 20-phase acquisition as the reference standard. The scan duration was proportional to the number of phases acquired. There was a systematic underestimation of LV, EDV, and EF, with decreasing number of phases. Differences from the reference standard became significant for the 8-phase acquisition (p<0.05). Subgroup analysis showed that only those with slower heart rates (<65/min) had significant differences in EDV, but not in EF, for the 8-phase acquisition. For those with faster heart rates, no differences were detected between the different acquisitions. There were no significant differences between all acquisitions for the LV ESV and mass. We conclude that at least 11 phases per cardiac cycle are needed to maintain accuracy for cine cardiac MRI studies. Decreasing the number of phases per cardiac cycle beyond this cutoff may introduce significant error of measurement, particularly for the left ventricular EDV and EF and especially for those with bradycardia, and should be avoided.

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Section: Discussionmentioning

confidence: 93%

Relationship of Number of Phases per Cardiac Cycle and Accuracy of Measurement of Left Ventricular Volumes, Ejection Fraction, and Mass

Roussakis

Baras

Seimenis

et al. 2004

J Cardiovasc Magn Reson

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“…In the in vivo part of this study, the measurements were taken at a location where the throughplane velocity-encoded measurements may be affected by cardiac and respiratory motion. Correction procedures have lately been proposed (22), and this could improve the accuracy of these measurements. However, this study focused on the precision of PVM.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of the Precision of Magnetic Resonance Phase Velocity Mapping for Blood Flow Measurements

Chatzimavroudis

Oshinski

Franch

et al. 2001

Journal of Cardiovascular Magnetic Resonance

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“…Still, diaphragmatic drift during prolonged periods of sustained respiration has been reported [16] and could be a limiting factor. Hereby, the combination of C S P A M M myocardial tagging with prospective real-time navigator tracking could be a valuable enhancement [17] of the present methodology. However, this remains to be further investigated.…”

Section: Discussionmentioning

confidence: 99%

Single breath-hold slice-following CSPAMM myocardial tagging

Stuber

1999

Magnetic Resonance Materials in Biology, Physics, and Medicine

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Myocardial tagging has shown to be a useful magnetic resonance modality for the assessment and quantification of local myocardial function. Many myocardial tagging techniques suffer from a rapid fading of the tags, restricting their application mainly to systolic phases of the cardiac cycle. However, left ventricular diastolic dysfunction has been increasingly appreciated as a major cause of heart failure. Subtraction based slice-following CSPAMM myocardial tagging has shown to overcome limitations such as fading of the tags. Remaining impediments to this technique, however, are extensive scanning times (~ 10 min), the requirement of repeated breath-holds using a coached breathing pattern, and the enhanced sensitivity to artifacts related to poor patient compliance or inconsistent depths of end-expiratory breath-holds. We therefore propose a combination of slice-following CSPAMM myocardial tagging with a segmented EPI imaging sequence. Together with an optimized RF excitation scheme, this enables to acquire as many as 20 systolic and diastolic grid-tagged images per cardiac cycle with a high tagging contrast during a short period of sustained respiration. 9

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Adaptive correction of imaging plane position in segmented K‐space cine cardiac MRI

Cited by 28 publications

References 10 publications

Relationship of Number of Phases per Cardiac Cycle and Accuracy of Measurement of Left Ventricular Volumes, Ejection Fraction, and Mass

Relationship of Number of Phases per Cardiac Cycle and Accuracy of Measurement of Left Ventricular Volumes, Ejection Fraction, and Mass

Evaluation of the Precision of Magnetic Resonance Phase Velocity Mapping for Blood Flow Measurements

Single breath-hold slice-following CSPAMM myocardial tagging

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