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0.3-second flash mri of the human heart

✍ Scribed by J. Frahm; K. D. Merboldt; H. Bruhn; M. L. Gyngell; W. Hänicke; D. Chien

Publisher
John Wiley and Sons
Year
1990
Tongue
English
Weight
536 KB
Volume
13
Category
Article
ISSN
0740-3194

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✦ Synopsis

Abstract

Flow‐suppressed FLASH MR images of the human heart have been recorded within a measuring time of 0.3 s using a 2.0‐T whole‐body research system (Siemens Magnetom) equipped with a conventional 10 mT m^−1^ gradient system. Subsecond imaging times have been achieved by reducing the repetition time to TR = 4.8 ms and by lowering the spatial resolution to 64 × 128 measured data points. The flip angle of the slice‐selective radiofrequency (rf) pulses was adjusted to 10^o^. Cardiac chambers, ventricular walls, and valves are well delineated in images from a single cardiac cycle using a field of view of 250 mm and a slice thickness of 8 mm. No motion artifacts were observed as a consequence of the short echo time of TE = 2.8 ms. Distinction between flowing blood and solid structures has been achieved by spatial presaturation of adjacent slices using two slice‐selective 90° rf pulses preceding the entire imaging sequence.

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