Upper abdominal phase-contrast MR angiography: comparison of cine and non-cine techniques.

Autor:	Burkart DJ; Department of Diagnostic Radiology, Mayo Clinic and Foundation, Rochester, MN 55905., Johnson CD
Jazyk:	angličtina
Zdroj:	Radiology [Radiology] 1995 Apr; Vol. 195 (1), pp. 101-5.
DOI:	10.1148/radiology.195.1.7892447
Abstrakt:	Purpose: To evaluate image quality, vessel conspicuity, and signal-to-noise ratio (S/N) of four two-dimensional magnetic resonance (MR) phase-contrast techniques: cine phase-contrast with respiratory compensation (CPC-R), cine phase-contrast without respiratory compensation (CPC), phase-contrast with two signals acquired (PC-2), and phase-contrast with eight signals acquired (PC-8). Materials and Methods: MR angiographic images of the portal vein were obtained in 14 patients. Results: Overall image quality was rated excellent in 10 of 14 patients (CPC-R), in one of 14 patients (CPC), in none of 14 patients (PC-2), and in one of 14 patients (PC-8). Views of 10 upper abdominal vessels were evaluated with each technique. The mean (+/- standard deviation) number of well-imaged vessels was 6 +/- 2 (CPC-R), 3 +/- 2 (CPC), 2 +/- 2 (PC-2), and 3 +/- 2 (PC-8). CPC-R images were significantly better in overall image quality and number of vessels seen (P < .01). Mean S/Ns were 10.8 +/- 3.4 (CPC-R), 6.8 +/- 2.7 (CPC), 4.5 +/- 1.7 (PC-2), and 6.4 +/- 2.1 (PC-8). S/N with CPC-R was significantly greater than with CPC, PC-2, or PC-8. Conclusion: CPC-R provided consistently higher quality angiographic images than were obtained with the other sequences studied.
Databáze:	MEDLINE
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