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.
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.
Authors: G Boudewijn C Vasbinder; Jeffrey H Maki; Robbert J Nijenhuis; Tim Leiner; Gregory J Wilson; Alfons G H Kessels; Etienne E L E Lemaire; Dave W Kaandorp; Kai Yiu J A M Ho; Jos M A van Engelshoven; Etienne E L E Lemarie Journal: J Magn Reson Imaging Date: 2002-12 Impact factor: 4.813
Authors: Kenneth L Coenegrachts; Romhild M Hoogeveen; Johan A Vaninbroukx; Hilde T Bosmans; Didier J Bielen; Geert Maleux; Frederik Maes; Pascal Hamaekers; Raymond H Oyen; Guy J Marchal Journal: Radiology Date: 2004-02-27 Impact factor: 11.105
Authors: Houchun Harry Hu; Peter Börnert; Diego Hernando; Peter Kellman; Jingfei Ma; Scott Reeder; Claude Sirlin Journal: Magn Reson Med Date: 2012-06-12 Impact factor: 4.668