A new five-dimensional MRI technique is making heart imaging faster and easier for patients with congenital heart disease. The gadolinium-enhanced 5D scan completed in just over 6 minutes — beating standard 2D and 3D protocols — while 98% of its images were rated diagnostically useful by blinded reviewers. The catch? Reconstruction currently takes over 8 hours, but AI-based tools may soon close that gap.
A new five-dimensional (5D) MRI technique could transform cardiac imaging for patients with congenital heart disease (CHD), offering faster scans without sacrificing diagnostic quality. In a retrospective study of 45 CHD patients, the gadolinium-enhanced 5D fast-interrupted steady-state (FISS) sequence captured whole-heart images — covering both cardiac and respiratory motion — without requiring breath-holding, simplifying the experience for patients.
The 5D scan clocked in at just 6 minutes 18 seconds, outpacing both standard 2D (7 min 16 sec) and 3D (6 min 55 sec) protocols. Ventricular volume measurements showed strong correlations between 5D and 2D imaging, and an impressive 98% of 5D images were rated diagnostically useful by three independent blinded reviewers, compared to only 78–87% of standard 3D images.
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Why it matters: For CHD patients who often require repeated cardiac imaging over a lifetime, a faster and simpler MRI protocol is a meaningful win. While lengthy reconstruction times remain a hurdle, advances in deep-learning reconstruction could soon make 5D MRI a practical clinical tool.
