Andra-Iza Iuga1, Nuran Abdullayev2, Kilian Weiss3, Stefan Haneder2, Lisa Brüggemann-Bratke4, David Maintz2, Robert Rau5, Grischa Bratke2. 1. Institute of Diagnostic and Interventional Radiology, Faculty of Medicine and University Hospital Cologne, University of Cologne, Kerpener Str. 62, 50937, Cologne, Germany. Electronic address: andra.iuga@uk-koeln.de. 2. Institute of Diagnostic and Interventional Radiology, Faculty of Medicine and University Hospital Cologne, University of Cologne, Kerpener Str. 62, 50937, Cologne, Germany. 3. Philips GmbH, Röntgen Str. 22, 22335, Hamburg, Germany. 4. Department of Orthopaedics, Trauma and Hand Surgery, Vinzenz Pallotti Hospital, Vinzenz-Pallotti Str. 20-24, 51429, Bergisch-Gladbach, Germany. 5. Department of Radiology, Kantonsspital Graubünden, Loes Str. 170, 7000, Chur, Switzerland.
Abstract
PURPOSE: To evaluate potential clinical acceleration factors of Compressed SENSE (CS)1 in direct comparison with SENSE for fat saturated (fs)2, proton density-weighted (PD)3 2D and 3D sequences of the knee. METHOD: Twenty healthy volunteers were scanned with a 3 T scanner, all receiving a standard, fs 2D PD, three CS (CS 2, CS 3, CS 5) as well as time-equivalent SENSE accelerations (S 2, S 3, S 5). The fs 3D PD sequence was acquired with four CS (CS 6, CS 8, CS 10, CS 15) and equivalent SENSE (S 5.72, S 7.69, S 9.57, S 14) factors. Three independent readers rated the images. Signal-to-noise, contrast-to-noise, root-mean-square error and structural similarity index were analyzed for objective evaluation. RESULTS: Scan time decreased with increasing CS factor (2D CS 2: 145 s, 2D CS 3: 95 s, 2D CS 5: 57 s, 3D CS 6: 293 s, 3D CS 8: 220 s, 3D CS 10: 176 s, 3D CS 15: 119 s). The 2D standard sequence was rated best for diagnostic certainty and overall image impression with an average of 4.97 ± 0.10 and 4.80 ± 0.24 (all p < 0.05), except for 2D CS 2 and 2D S 2. For the 3D sequences, the standard sequence performed better for both parameters for CS 15, S 9.57 and S 4, as well as S 7.69 for overall image impression while CS 8 was non-inferior for all tested criteria and CS 10 only inferior for delineation of the anterior cruciate ligament, both outperforming the time-equivalent SENSE accelerations. CONCLUSION: Compressed SENSE can significantly decrease (34.39 % for 2D CS 2 and 54.17 % for 3D CS 10) scan time in knee imaging with unchanged diagnostic certainty and overall image impression compared to the clinical reference.
PURPOSE: To evaluate potential clinical acceleration factors of Compressed SENSE (CS)1 in direct comparison with SENSE for fat saturated (fs)2, proton density-weighted (PD)3 2D and 3D sequences of the knee. METHOD: Twenty healthy volunteers were scanned with a 3 T scanner, all receiving a standard, fs 2D PD, three CS (CS 2, CS 3, CS 5) as well as time-equivalent SENSE accelerations (S 2, S 3, S 5). The fs 3D PD sequence was acquired with four CS (CS 6, CS 8, CS 10, CS 15) and equivalent SENSE (S 5.72, S 7.69, S 9.57, S 14) factors. Three independent readers rated the images. Signal-to-noise, contrast-to-noise, root-mean-square error and structural similarity index were analyzed for objective evaluation. RESULTS: Scan time decreased with increasing CS factor (2D CS 2: 145 s, 2D CS 3: 95 s, 2D CS 5: 57 s, 3D CS 6: 293 s, 3D CS 8: 220 s, 3D CS 10: 176 s, 3D CS 15: 119 s). The 2D standard sequence was rated best for diagnostic certainty and overall image impression with an average of 4.97 ± 0.10 and 4.80 ± 0.24 (all p < 0.05), except for 2D CS 2 and 2D S 2. For the 3D sequences, the standard sequence performed better for both parameters for CS 15, S 9.57 and S 4, as well as S 7.69 for overall image impression while CS 8 was non-inferior for all tested criteria and CS 10 only inferior for delineation of the anterior cruciate ligament, both outperforming the time-equivalent SENSE accelerations. CONCLUSION: Compressed SENSE can significantly decrease (34.39 % for 2D CS 2 and 54.17 % for 3D CS 10) scan time in knee imaging with unchanged diagnostic certainty and overall image impression compared to the clinical reference.
Authors: Judith Herrmann; Gabriel Keller; Sebastian Gassenmaier; Dominik Nickel; Gregor Koerzdoerfer; Mahmoud Mostapha; Haidara Almansour; Saif Afat; Ahmed E Othman Journal: Eur Radiol Date: 2022-04-07 Impact factor: 7.034