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Defining the optimal temporal and spatial resolution for cardiovascular magnetic resonance imaging feature tracking
Journal of Cardiovascular Magnetic Resonance ( IF 6.4 ) Pub Date : 2021-05-17 , DOI: 10.1186/s12968-021-00740-5
Sören J Backhaus 1, 2 , Georg Metschies 1, 2 , Marcus Billing 1, 2 , Jonas Schmidt-Rimpler 1, 2 , Johannes T Kowallick 2, 3 , Roman J Gertz 1, 2 , Tomas Lapinskas 4, 5, 6 , Elisabeth Pieske-Kraigher 4 , Burkert Pieske 4 , Joachim Lotz 2, 3 , Boris Bigalke 7 , Shelby Kutty 8 , Gerd Hasenfuß 1, 2 , Sebastian Kelle 4, 5 , Andreas Schuster 1, 2
Affiliation  

Myocardial deformation analyses using cardiovascular magnetic resonance (CMR) feature tracking (CMR-FT) have incremental value in the assessment of cardiac function beyond volumetric analyses. Since guidelines do not recommend specific imaging parameters, we aimed to define optimal spatial and temporal resolutions for CMR cine images to enable reliable post-processing. Intra- and inter-observer reproducibility was assessed in 12 healthy subjects and 9 heart failure (HF) patients. Cine images were acquired with different temporal (20, 30, 40 and 50 frames/cardiac cycle) and spatial resolutions (high in-plane 1.5 × 1.5 mm through-plane 5 mm, standard 1.8 × 1.8 x 8mm and low 3.0 × 3.0 x 10mm). CMR-FT comprised left ventricular (LV) global and segmental longitudinal/circumferential strain (GLS/GCS) and associated systolic strain rates (SR), and right ventricular (RV) GLS. Temporal but not spatial resolution did impact absolute strain and SR. Maximum absolute changes between lowest and highest temporal resolution were as follows: 1.8% and 0.3%/s for LV GLS and SR, 2.5% and 0.6%/s for GCS and SR as well as 1.4% for RV GLS. Changes of strain values occurred comparing 20 and 30 frames/cardiac cycle including LV and RV GLS and GCS (p < 0.001–0.046). In contrast, SR values (LV GLS/GCS SR) changed significantly comparing all successive temporal resolutions (p < 0.001–0.013). LV strain and SR reproducibility was not affected by either temporal or spatial resolution, whilst RV strain variability decreased with augmentation of temporal resolution. Temporal but not spatial resolution significantly affects strain and SR in CMR-FT deformation analyses. Strain analyses require lower temporal resolution and 30 frames/cardiac cycle offer consistent strain assessments, whilst SR measurements gain from further increases in temporal resolution.

中文翻译:

定义心血管磁共振成像特征跟踪的最佳时间和空间分辨率

使用心血管磁共振 (CMR) 特征跟踪 (CMR-FT) 的心肌变形分析在评估心脏功能方面具有超越体积分析的增量价值。由于指南不推荐特定的成像参数,我们旨在为 CMR 电影图像定义最佳的空间和时间分辨率,以实现可靠的后处理。在 12 名健康受试者和 9 名心力衰竭 (HF) 患者中评估了观察者内和观察者间的可重复性。使用不同的时间(20、30、40 和 50 帧/心脏周期)和空间分辨率(高平面内 1.5 × 1.5 毫米通过平面 5 毫米,标准 1.8 × 1.8 x 8 毫米和低 3.0 × 3.0 x 10 毫米)。CMR-FT 包括左心室 (LV) 整体和节段纵向/周向应变 (GLS/GCS) 和相关的收缩应变率 (SR),和右心室 (RV) GLS。时间而非空间分辨率确实会影响绝对应变和 SR。最低和最高时间分辨率之间的最大绝对变化如下:LV GLS 和 SR 为 1.8% 和 0.3%/s,GCS 和 SR 为 2.5% 和 0.6%/s,RV GLS 为 1.4%。比较 20 和 30 帧/心脏周期,包括 LV 和 RV GLS 和 GCS,应变值发生了变化(p < 0.001–0.046)。相比之下,与所有连续的时间分辨率相比,SR 值(LV GLS/GCS SR)发生了显着变化(p < 0.001–0.013)。LV 应变和 SR 再现性不受时间或空间分辨率的影响,而 RV 应变变异性随着时间分辨率的增加而降低。时间而非空间分辨率显着影响 CMR-FT 变形分析中的应变和 SR。
更新日期:2021-05-18
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