Three-Dimensional Phase-Sensitive Inversion-Recovery Turbo FLASH Sequence for the Evaluation of Left Ventricular Myocardial Scar

Abstract

Free-breathing 3D PSIR turbo FLASH imaging is a promising technique for the assessment of left ventricular scar particularly for scar quantification and the detection of small nonischemic scars in the myocardium.

Integration of 3D Electroanatomic Maps and Magnetic Resonance Scar Characterization Into the Navigation System to Guide Ventricular Tachycardia Ablation

“…Seven minutes after intravenous administration of gadodiamide-DTPA (Omniscan, Amersham Health) at a dose of 0.2 mmol/kg, a whole-heart, high spatial resolution, delayed-enhanced study was conducted using a commercially available free-breathing, navigatorgated, 3D inversion-recovery, gradient echo technique. 11,12 The 3D slab was acquired in the transaxial direction, with a 256ϫ256 pixels matrix size and minimized field of view. A Cartesian trajectory was used to fill the k-space and the phase-encoding (y) direction was anteroposterior.…”

Head‐to‐head comparison of eight late gadolinium‐enhanced cardiac MR (LGE CMR) sequences at 1.5 tesla: From bench to bedside

“…CNR values were also obtained for non-PSIR sequences. Side-by-side quantitative clinical comparison between all sequences was also based on %SE, because background noise is intrinsically modified by signal normalization and the PSIR reconstruction process, preventing CNR measurement on PSIR-reconstructed images, as previously reported (36).…”

“…CNR values were also obtained for non-PSIR sequences. Because background noise is intrinsically modified by signal normalization and the PSIR reconstruction process, CNR measurement could not be achieved on PSIR-reconstructed images, as previously shown (36). Therefore, as in vivo studies, side-by-side quantitative clinical comparison between all sequences was also based on %SE.…”

“…Parallel imaging was not used in the present study, but is available for all the sequences, including 3D techniques, and requires only a very reasonable breathhold duration of approximately 15 s for full LV coverage in short-axis acquisition (full LV coverage in 4-mm slices, <20 s). True isotropic and also 3D PSIR acquisition can now be obtained on free-breathing protocols synchronized to the patient's respiration using navigators (36). These last two options were either intentionally not tested in our patients for ethical and time reasons (free-breathing acquisition using respiratory synchronization based on navigator-echoes Figure 4.…”

Three-dimensional phase-sensitive inversion recovery sequencing in the evaluation of left ventricular myocardial scars in ischemic and non-ischemic cardiomyopathy: Comparison to three-dimensional inversion recovery sequencing

“…The 3D PSIR technique is widely expected to provide operator-independent reproducible images with high spatial resolution [20,21]. It is also expected to ensure accurate lesion detection as well as reliable quantification of myocardial fibrosis [22][23][24]. The purpose of this study was to compare a free-breathing 3D PSIR sequence to an established breath-held 3D IR sequence with regard to image quality and the detectability of LGE in patients suspected of ischemic cardiac disease or non-ischemic cardiomyopathy.…”