PURPOSE: To evaluate differences in velocity and flow measurements in the aorta between accelerated phase-contrast (PC) magnetic resonance imaging (MRI) using SENSE and k-t BLAST and in peak velocity to Doppler ultrasound. MATERIALS AND METHODS: Two-dimensional PC-MRI perpendicular to the ascending and descending aorta was performed in 11 volunteers using SENSE (R = 2) and k-t BLAST (2-, 4-, 6-, and 8-fold). Peak velocity, mean velocity, and stroke volume of the accelerated PC-MRI experiments were correlated. Peak velocities were compared to Doppler ultrasound. RESULTS: All acceleration techniques showed significant correlations for peak velocity with Doppler ultrasound. However, k-t BLAST 6 and 8 showed a significant underestimation. Strong correlations between SENSE and k-t BLAST were found for all three parameters. Significant differences in peak velocity were found between SENSE and all k-t BLAST experiments, but not for 2-fold k-t BLAST in the ascending aorta, and 2- and 4-fold k-t BLAST in the descending aorta. For mean velocity no significant differences were found. Stroke volume showed significant differences for all k-t BLAST experiments in the ascending and for 6- and 8-fold k-t BLAST in the descending aorta. CONCLUSION: Peak velocity of accelerated PC-MRI correlated with CW Doppler measurements, but high k-t BLAST acceleration factors lead to a significant underestimation. SENSE with R = 2 and 2-fold k-t BLAST are most highly correlated in phase-contrast flow measurements.
PURPOSE: To evaluate differences in velocity and flow measurements in the aorta between accelerated phase-contrast (PC) magnetic resonance imaging (MRI) using SENSE and k-t BLAST and in peak velocity to Doppler ultrasound. MATERIALS AND METHODS: Two-dimensional PC-MRI perpendicular to the ascending and descending aorta was performed in 11 volunteers using SENSE (R = 2) and k-t BLAST (2-, 4-, 6-, and 8-fold). Peak velocity, mean velocity, and stroke volume of the accelerated PC-MRI experiments were correlated. Peak velocities were compared to Doppler ultrasound. RESULTS: All acceleration techniques showed significant correlations for peak velocity with Doppler ultrasound. However, k-t BLAST 6 and 8 showed a significant underestimation. Strong correlations between SENSE and k-t BLAST were found for all three parameters. Significant differences in peak velocity were found between SENSE and all k-t BLAST experiments, but not for 2-fold k-t BLAST in the ascending aorta, and 2- and 4-fold k-t BLAST in the descending aorta. For mean velocity no significant differences were found. Stroke volume showed significant differences for all k-t BLAST experiments in the ascending and for 6- and 8-fold k-t BLAST in the descending aorta. CONCLUSION: Peak velocity of accelerated PC-MRI correlated with CW Doppler measurements, but high k-t BLAST acceleration factors lead to a significant underestimation. SENSE with R = 2 and 2-fold k-t BLAST are most highly correlated in phase-contrast flow measurements.
Authors: Bjoern P Schoennagel; Chressen C Remus; Jin Yamamura; Fabian Kording; Manuela Tavares de Sousa; Manuela Tavares de Sousa; Kurt Hecher; Roland Fischer; Friedrich Ueberle; Matthias Boehme; Gerhard Adam; Hendrik Kooijman; Ulrike Wedegaertner Journal: MAGMA Date: 2013-08-10 Impact factor: 2.310
Authors: B P Schoennagel; J Yamamura; F Kording; R Fischer; P Bannas; G Adam; H Kooijman; C Ruprecht; K Fehrs; M Tavares de Sousa Journal: Eur Radiol Date: 2019-01-07 Impact factor: 5.315
Authors: Pim van Ooij; Annetje Guédon; Henk A Marquering; Joppe J Schneiders; Charles B Majoie; Ed van Bavel; Aart J Nederveen Journal: MAGMA Date: 2012-09-07 Impact factor: 2.310
Authors: Zoran Stankovic; Jury Fink; Jeremy D Collins; Edouard Semaan; Maximilian F Russe; James C Carr; Michael Markl; Mathias Langer; Bernd Jung Journal: MAGMA Date: 2014-08-07 Impact factor: 2.310
Authors: Jingfeng Jiang; Charles Strother; Kevin Johnson; Sara Baker; Dan Consigny; Oliver Wieben; James Zagzebski Journal: Phys Med Biol Date: 2011-02-23 Impact factor: 3.609
Authors: W Chang; B Landgraf; K M Johnson; S Kecskemeti; Y Wu; J Velikina; H Rowley; O Wieben; C Mistretta; P Turski Journal: AJNR Am J Neuroradiol Date: 2010-10-14 Impact factor: 3.825
Authors: Jordan P Hulet; Andreas Greiser; Jason K Mendes; Chris McGann; Gerald Treiman; Dennis L Parker Journal: J Magn Reson Imaging Date: 2013-04-30 Impact factor: 4.813