A theoretical framework for retrospective correction to the arterial input function in quantitative myocardial perfusion MRI.

Purpose: To develop and evaluate a flexible, Bloch-equation based framework for retrospective correction to the arterial input function (AIF) obtained with quantitative cardiac perfusion pulse sequences.

Methods: Our framework initially calculates the gadolinium concentration [Gd] based on T measurements alone. Next, is estimated from this initial calculation of [Gd] while assuming fast water exchange and using the literature native T and static magnetic field variation (ΔB ) values.

Highly Accelerated Real-Time Free-Breathing Cine CMR for Patients With a Cardiac Implantable Electronic Device.

Rationale And Objectives: To develop a 16-fold accelerated real-time, free-breathing cine cardiovascular magnetic resonance (CMR) pulse sequence with compressed sensing reconstruction and test whether it is capable of producing clinically acceptable summed visual scores (SVS) and accurate left ventricular ejection fraction (LVEF) in patients with a cardiac implantable electronic device (CIED).

Materials And Methods: A 16-fold accelerated real-time cine CMR pulse sequence was developed using gradient echo readout, Cartesian k-space sampling, and compressed sensing. We scanned 13 CIED patients (mean age = 59 years; 9/4 males/females) using clinical standard, breath-hold cine and real-time, free-breathing cine.