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EFFICIENT PULSE SEQUENCE FOR MULTISECTION DUAL REPETITION TIME MR IMAGE ACQUISITION

EFFICIENT PULSE SEQUENCE FOR MULTISECTION DUAL REPETITION TIME MR IMAGE ACQUISITION RADIOLOGY Farzaneh, F., Riederer, S. J., DJANG, W. T., Curnes, J. T., Herfkens, R. J. 1988; 167 (2): 541-546

Abstract

A magnetic resonance imaging pulse sequence was developed in which multisection spin-echo image data are simultaneously acquired for two repetition time (TR) intervals (TR1 and TR2) in one imaging sequence. In a conventional multisection image at a single TR, the number of sections is limited to TR/TS, where TS is the readout time. With this new sequence, the number of sections that can be imaged at both TRs in one acquisition is equal to (TR1 + TR2)/(TS1 + TS2), where TS1 and TS2 may be different for the two TRs. Imaging time is equal to that for a single image at a TR of TR1 + TR2. Clinical images were obtained with the new sequence from 15 patients and compared with images acquired at the same TR/TE by means of standard multisection single-TR methods. Relative image quality was assessed by three radiologists in 37 comparisons. In general, the dual-TR results at the long TR were judged equivalent to those from a single-TR image. Dual-TR results at the short TR had a modest reduction in contrast, but in none of 15 cases were any pathologic features missed.

View details for Web of Science ID A1988N010900057

View details for PubMedID 3357969