Influence of motion correction on the visual analysis of cardiac magnetic resonance stress perfusion imaging

Knobelsdorff-Brenkenhoff, Florian von; Reiter, Stephanie; Menini, Anne; Janich, Martin A.; Schunke, Tobias; Ziegler, Karl; Scheck, Roland; Höfling, Berthold und Pilz, Guenter (2021): Influence of motion correction on the visual analysis of cardiac magnetic resonance stress perfusion imaging. In: Magnetic Resonance Materials in Physics Biology and Medicine, Bd. 34, Nr. 5: S. 757-766

Abstract

Objective Image post-processing corrects for cardiac and respiratory motion (MoCo) during cardiovascular magnetic resonance (CMR) stress perfusion. The study analyzed its influence on visual image evaluation. Materials and methods Sixty-two patients with (suspected) coronary artery disease underwent a standard CMR stress perfusion exam during free-breathing. Image post-processing was performed without (non-MoCo) and with MoCo (image intensity normalization;motion extraction with iterative non-rigid registration;motion warping with the combined displacement field). Images were evaluated regarding the perfusion pattern (perfusion deficit, dark rim artifact, uncertain signal loss, and normal perfusion), the general image quality (non-diagnostic, imperfect, good, and excellent), and the reader's subjective confidence to assess the images (not confident, confident, very confident). Results Fifty-three (non-MoCo) and 52 (MoCo) myocardial segments were rated as 'perfusion deficit', 113 vs. 109 as 'dark rim artifacts', 9 vs. 7 as 'uncertain signal loss', and 817 vs. 824 as 'normal'. Agreement between non-MoCo and MoCo was high with no diagnostic difference per-patient. The image quality of MoCo was rated more often as 'good' or 'excellent' (92 vs. 63%), and the diagnostic confidence more often as very confident (71 vs. 45%) compared to non-MoCo. Conclusions The comparison of perfusion images acquired during free-breathing and post-processed with and without motion correction demonstrated that both methods led to a consistent evaluation of the perfusion pattern, while the image quality and the reader's subjective confidence to assess the images were rated more favorably for MoCo.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Medizin
• Themengebiete: 600 Technik, Medizin, angewandte Wissenschaften > 610 Medizin und Gesundheit
• ISSN: 0968-5243
• Sprache: Englisch