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Preliminary experience with a new double-echo half-Fourier single-shot turbo spin echo acquisition in the characterization of liver lesions

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Abstract

A new double-echo half-Fourier single-shot turbo spin echo technique has been implemented in which two images are obtained per excitation pulse, one with an echo time (TE) of 60 ms and another with a TE of 438 ms. The acquisition window per image is 380 ms and is determined by the echo spacing of 4.3 ms and the echo train length of 88 for images with resolution of 160×256. No breath holding was performed. The aim of the study was to test whether the additional information of the late TE image improves the characterization of liver lesions. Twenty-eight patients with 39 focal liver lesions (9 cysts, 11 hemangiomas, and 19 solid lesions) were imaged with the new technique, and signal intensity (SI) ratios of lesion and liver were obtained. At-test analysis showed that in the TE 60 ms image, SI ratios of cysts and hemangiomas were not significantly different, whereas in the TE 438 ms images the two types of lesions can be classified. Signal intensity ratios of solid lesions were in both images clearly lower than those of cysts and hemangiomas. The technique, therefore, seems a promising and straightforward new tool for the characterization of liver lesions.

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Authors and Affiliations

  1. Department of Radiology, University Hospitals K.U. Leuven, Herestraat 49, B-3000, Leuven, Belgium

    Hilde Bosmans, Stefaan Gryspeerdt, Lieven Van Hoe, Sylvie Van Oostende, Tom De Jaegere, Albert L. Baert & Guy Marchal

  2. Siemens AG, Erlangen, Germany

    Berthold Kiefer

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  1. Hilde Bosmans
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  2. Stefaan Gryspeerdt
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  3. Lieven Van Hoe
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  4. Sylvie Van Oostende
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  5. Tom De Jaegere
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  6. Berthold Kiefer
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  7. Albert L. Baert
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  8. Guy Marchal
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Bosmans, H., Gryspeerdt, S., Van Hoe, L. et al. Preliminary experience with a new double-echo half-Fourier single-shot turbo spin echo acquisition in the characterization of liver lesions. MAGMA 5, 79–84 (1997). https://doi.org/10.1007/BF02592270

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  • DOI: https://doi.org/10.1007/BF02592270

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