- Oral presentation
- Open Access
k-t SENSE accelerated stress myocardial perfusion MRI at 3 Tesla
Journal of Cardiovascular Magnetic Resonance volume 11, Article number: O35 (2009)
The purpose of this study was to evaluate the feasibility and diagnostic accuracy of high spatial resolution stress myocardial perfusion MRI acquired at every heartbeat by using k-t SENSE and 3 Tesla MR imager.
High spatial and temporal resolutions are required for the accurate assessment of myocardial ischemia using stress perfusion MRI.
Thirty-three patients with suspected coronary artery disease were studied. High spatial resolution (<2 mm) first-pass contrast enhanced MR images were obtained at rest and during stress by using a 3.0 T MR imager (Achieva) and k-t SENSE acceleration factor of 5. Saturation recovery TFE images were acquired with TR/TE of 2.9 ms/1.5 ms, FOV = 40 × 30 cm, matrix = 256 × 192, slice thickness = 8 mm. Three short-axis sections of the left ventricle were imaged at every heart beat. Two observers determined the image quality score (1:poor – 4:excellent) and recorded the presence or absence of respiratory artifacts and endocardial dark rim artifacts using a 16-segment model.
All studies were successfully completed, with the averaged image quality score of 3.8 ± 0.4. Endocardial dark rim artifacts were observed in 17 (3.2%) of 528 segments, but there were no cases in which dark-rim artifacts influenced the diagnosis. Respiratory artifacts were found in 11 (2.1%) of 528 segments. In 14 patients who underwent coronary angiography within 2 weeks from MR study, stress-rest perfusion MRI demonstrated the sensitivity, specificity, positive and negative predictive values and accuracy of were 90.9%(10/11), 96.7%(30/31), 90.9%(10/11), 96.7%(30/31) and 95.2%(40/42) for detecting significant coronary artery disease. Figures 1 and 2.
Perfusion MR images with high spatial resolution can be acquired at every heart beat by using a 3 T MR imager and k-t SENSE acceleration. This approach can substantially reduce endocardial dark rim artifacts and allows for an accurate detection of myocardial ischemia in patients with flow-limiting coronary artery disease.
Rights and permissions
Open Access This article is published under license to BioMed Central Ltd. This is an Open Access article is distributed under the terms of the Creative Commons Attribution 2.0 International License (https://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
About this article
Cite this article
Kato, S., Sakuma, H., Nagata, M. et al. k-t SENSE accelerated stress myocardial perfusion MRI at 3 Tesla. J Cardiovasc Magn Reson 11 (Suppl 1), O35 (2009). https://doi.org/10.1186/1532-429X-11-S1-O35
- High Spatial Resolution
- Heart Beat
- Significant Coronary Artery Disease
- Suspected Coronary Artery Disease
- Image Quality Score