Single-Shot Coronary Quiescent-Interval Slice-Selective Magnetic Resonance Angiography Using Compressed Sensing: A Feasibility Study in Patients With Congenital Heart Disease

Shen, D.; Edelman, R. R.; Robinson, J. D.; Haji-Valizadeh, H.; Messina, M.; Giri, S.; Koktzoglou, I.; Rigsby, C. K.; Kim, D.

J Comput Assist Tomogr. 2018 Jun 30

Abstract

OBJECTIVE: The aim of this study was to determine whether it is feasible to visualize the coronary origins in patients with congenital heart disease (CHD) using single-shot coronary quiescent-interval slice-selective (QISS) magnetic resonance angiography (MRA) with compressed sensing (CS). METHODS: This retrospective study leveraged a parent study, which aimed to compare breath-hold, 2.1-fold accelerated, 2-shot coronary QISS MRA and clinical standard contrast-enhanced (CE) MRA in 14 patients with CHD (mean age, 17.0 +/- 8.6 years, 6 females and 8 males). We evaluated the feasibility of single-shot coronary QISS MRA by retrospectively undersampling the 2-shot data set by an additional factor of 2, performing CS reconstruction, and comparing the retrospectively derived single-shot QISS MRA to 2-shot coronary QISS MRA and clinical standard CE MRA. For quantitative analysis, structural similarity index and normalized root mean square error were calculated. For qualitative analysis, 2 experienced readers scored the conspicuity of coronary origins on a 5-point Likert scale (1 = nondiagnostic, 2 = poor, 3 = clinically acceptable, 4 = good, 5 = excellent). RESULTS: Compared with 2-shot QISS, single-shot QISS produced normalized root mean square error of 5.8% +/- 0.8% and structural similarity index of 95.4% +/- 1.6%, suggesting high data fidelity by CS reconstruction. Compared with the mean conspicuity scores for clinical CE MRA (4.2 +/- 0.5 and 4.1 +/- 0.6 for right and left coronary origins, respectively), the mean conspicuity scores were not significantly different (P > 0.3) for 2-shot QISS (4.4 +/- 0.9 and 4.2 +/- 1.1, respectively) and single-shot QISS with CS (4.3 +/- 1.1 and 3.8 +/- 1.3, respectively) and deemed clinically acceptable to good (scores >/=3.0). CONCLUSIONS: This study shows that it is feasible to visualize the coronary origins in patients with CHD with clinically acceptable to good image quality using single-shot coronary QISS MRA with CS.

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