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Inversion‐recovery‐prepared dixon bSSFP: Initial clinical experience with a novel pulse sequence for renal MRA within a breathhold
Author(s) -
Worters Pauline W.,
Saranathan Manojkumar,
Xu Alan,
Vasanawala Shreyas S.
Publication year - 2012
Publication title -
journal of magnetic resonance imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.563
H-Index - 160
eISSN - 1522-2586
pISSN - 1053-1807
DOI - 10.1002/jmri.23503
Subject(s) - medicine , radiology , contrast enhancement , contrast (vision) , nuclear medicine , magnetic resonance angiography , magnetic resonance imaging , computer science , artificial intelligence
Purpose: To evaluate the capability of a new breathhold non–contrast‐enhanced MRA method (Non‐contrast Outer Radial Inner Square k ‐space Scheme, NORISKS) to visualize renal arteries by comparing the method with a routine clinical but significantly longer non–contrast‐enhanced (non‐CE) MRA technique. Materials and Methods: Eighteen subjects referred for abdominal MRI were examined with NORISKS and a routine non–contrast‐enhanced MRA technique. Two versions of NORISKS were evaluated: with and without ECG gating. The images were then scored independently and in blinded manner by two radiologists on 5‐point scales for visualization of the proximal and distal renal arteries and quality of fat suppression. Results: No statistically significant difference was detected between NORISKS and routine clinical non‐CE MRA in all categories except for visualization of the distal renal arteries where ungated NORISKS performed poorer than the routine non‐CE MRA ( P < 10 −4 ). Conclusion: We have demonstrated a promising non‐CE MRA method for acquiring renal angiograms within a breathhold without any compromise in spatial resolution or coverage. ECG‐gated NORISKS is able to acquire renal angiograms that are comparable to a routine clinical non‐CE MRA method (Inhance IFIR, GE Healthcare), which requires approximately seven times the scan time of NORISKS. J. Magn. Reson. Imaging 2012;35:875–881. © 2011 Wiley Periodicals, Inc.