Juliane Goebel1, Felix Nensa2, Bettina Bomas2, Haemi P Schemuth2, Stefan Maderwald3, Marcel Gratz3,4, Harald H Quick3,4, Thomas Schlosser2, Kai Nassenstein2. 1. Department of Diagnostic and Interventional Radiology and Neuroradiology, University Hospital Essen, Hufelandstrasse 55, 45122, Essen, Germany. juliane.goebel@uk-essen.de. 2. Department of Diagnostic and Interventional Radiology and Neuroradiology, University Hospital Essen, Hufelandstrasse 55, 45122, Essen, Germany. 3. Erwin L. Hahn Institute for Magnetic Resonance Imaging, University of Duisburg-Essen, Essen, Germany. 4. High Field and Hybrid MR Imaging, University Hospital Essen, Essen, Germany.
Abstract
OBJECTIVES: Improved real-time cardiac magnetic resonance (CMR) sequences have currently been introduced, but so far only limited practical experience exists. This study aimed at image reconstruction optimization and clinical validation of a new highly accelerated real-time cine SPARSE-SENSE sequence. METHODS: Left ventricular (LV) short-axis stacks of a real-time free-breathing SPARSE-SENSE sequence with high spatiotemporal resolution and of a standard segmented cine SSFP sequence were acquired at 1.5 T in 11 volunteers and 15 patients. To determine the optimal iterations, all volunteers' SPARSE-SENSE images were reconstructed using 10-200 iterations, and contrast ratios, image entropies, and reconstruction times were assessed. Subsequently, the patients' SPARSE-SENSE images were reconstructed with the clinically optimal iterations. LV volumetric values were evaluated and compared between both sequences. RESULTS: Sufficient image quality and acceptable reconstruction times were achieved when using 80 iterations. Bland-Altman plots and Passing-Bablok regression showed good agreement for all volumetric parameters. CONCLUSIONS: 80 iterations are recommended for iterative SPARSE-SENSE image reconstruction in clinical routine. Real-time cine SPARSE-SENSE yielded comparable volumetric results as the current standard SSFP sequence. Due to its intrinsic low image acquisition times, real-time cine SPARSE-SENSE imaging with iterative image reconstruction seems to be an attractive alternative for LV function analysis. KEY POINTS: • A highly accelerated real-time CMR sequence using SPARSE-SENSE was evaluated. • SPARSE-SENSE allows free breathing in real-time cardiac cine imaging. • For clinically optimal SPARSE-SENSE image reconstruction, 80 iterations are recommended. • Real-time SPARSE-SENSE imaging yielded comparable volumetric results as the reference SSFP sequence. • The fast SPARSE-SENSE sequence is an attractive alternative to standard SSFP sequences.
OBJECTIVES: Improved real-time cardiac magnetic resonance (CMR) sequences have currently been introduced, but so far only limited practical experience exists. This study aimed at image reconstruction optimization and clinical validation of a new highly accelerated real-time cine SPARSE-SENSE sequence. METHODS: Left ventricular (LV) short-axis stacks of a real-time free-breathing SPARSE-SENSE sequence with high spatiotemporal resolution and of a standard segmented cine SSFP sequence were acquired at 1.5 T in 11 volunteers and 15 patients. To determine the optimal iterations, all volunteers' SPARSE-SENSE images were reconstructed using 10-200 iterations, and contrast ratios, image entropies, and reconstruction times were assessed. Subsequently, the patients' SPARSE-SENSE images were reconstructed with the clinically optimal iterations. LV volumetric values were evaluated and compared between both sequences. RESULTS: Sufficient image quality and acceptable reconstruction times were achieved when using 80 iterations. Bland-Altman plots and Passing-Bablok regression showed good agreement for all volumetric parameters. CONCLUSIONS: 80 iterations are recommended for iterative SPARSE-SENSE image reconstruction in clinical routine. Real-time cine SPARSE-SENSE yielded comparable volumetric results as the current standard SSFP sequence. Due to its intrinsic low image acquisition times, real-time cine SPARSE-SENSE imaging with iterative image reconstruction seems to be an attractive alternative for LV function analysis. KEY POINTS: • A highly accelerated real-time CMR sequence using SPARSE-SENSE was evaluated. • SPARSE-SENSE allows free breathing in real-time cardiac cine imaging. • For clinically optimal SPARSE-SENSE image reconstruction, 80 iterations are recommended. • Real-time SPARSE-SENSE imaging yielded comparable volumetric results as the reference SSFP sequence. • The fast SPARSE-SENSE sequence is an attractive alternative to standard SSFP sequences.
Entities:
Keywords:
Iterative reconstruction; Left ventricular volumetry; Real-time imaging; SPARSE sampling; SPARSE-SENSE cine imaging
Authors: Holger C Eberle; Kai Nassenstein; Christoph J Jensen; Thomas Schlosser; Georg V Sabin; Christoph K Naber; Oliver Bruder Journal: Eur Radiol Date: 2009-07-25 Impact factor: 5.315
Authors: Aurelien F Stalder; Michaela Schmidt; Harald H Quick; Marc Schlamann; Stefan Maderwald; Peter Schmitt; Qiu Wang; Mariappan S Nadar; Michael O Zenge Journal: Magn Reson Med Date: 2014-12-17 Impact factor: 4.668
Authors: Li Feng; Monvadi B Srichai; Ruth P Lim; Alexis Harrison; Wilson King; Ganesh Adluru; Edward V R Dibella; Daniel K Sodickson; Ricardo Otazo; Daniel Kim Journal: Magn Reson Med Date: 2012-08-06 Impact factor: 4.668
Authors: Bradley D Allen; Maria L Carr; Michael Markl; Michael O Zenge; Michaela Schmidt; Mariappan S Nadar; Bruce Spottiswoode; Jeremy D Collins; James C Carr Journal: Eur Radiol Date: 2018-01-30 Impact factor: 5.315
Authors: Yu Y Li; Pengyue Zhang; Shams Rashid; Yang J Cheng; Wenhui Li; William Schapiro; Kathleen Gliganic; Ann-Marie Yamashita; Marie Grgas; Elizabeth Haag; J Jane Cao Journal: Magn Reson Imaging Date: 2020-10-21 Impact factor: 2.546