PURPOSE To quantitatively assess the performance and reproducibility of 3D spiral coronary artery wall imaging with beat-to-beat respiratory-motion-correction (B2B-RMC) compared to navigator gated 2D spiral and turbo-spin-echo (TSE) acquisitions. MATERIALS AND METHODS High-resolution (0.7 × 0.7 mm) cross-sectional right coronary wall acquisitions were performed in 10 subjects using four techn...

During human pregnancy, natural killer (NK) cells accumulate in the maternal decidua, but their specific roles remain to be determined. Decidual NK (dNK) cells are present during trophoblast invasion and uterine spiral artery remodelling. These events are crucial for successful placentation and the provision of an adequate blood supply to the developing fetus. Remodelling of spiral arteries is ...

PURPOSE To demonstrate the feasibility of retrospective beat-to-beat correction of respiratory motion, without the need for a respiratory motion model. MATERIALS AND METHODS A high-resolution three-dimensional (3D) spiral black-blood scan of the right coronary artery (RCA) of six healthy volunteers was acquired over 160 cardiac cycles without respiratory gating. One spiral interleaf was acqui...

The large and multiple spontaneous coronary artery dissections of a 54-year-old man Coronary angiography demonstrated spiral dissection of right coronary artery (RCA) and of proximal and second diagonal branch the left descending coronary artery (LAD) (Figs. 1 and 2), and significant obstruction of the proximal segment of LAD. Revascularization was performed with LIMA to LAD and saphenous vein ...

Regulation of cochlear blood flow is critical for hearing due to its exquisite sensitivity to ischemia and oxidative stress. Many forms of hearing loss such as sensorineural hearing loss and presbyacusis may involve or be aggravated by blood flow disorders. Animal experiments and clinical outcomes further suggest that there is a gender preference in hearing loss, with males being more susceptib...

Background First-pass perfusion imaging using CMR is an important tool for diagnosing coronary artery disease (CAD), but most clinical techniques are limited in their spatial coverage. While compressed-sensing (CS) holds promise for highly accelerated perfusion spiral imaging, CS techniques suffer from blurring artifacts in the setting of respiratory motion. Spiral pulse sequences have multiple...

OBJECTIVES The great arteries are in a non-spiral relationship in their transposition, even after arterial switch operation (ASO) with the Lecompte manoeuvre. We aim to restore the natural spiral great arteries and compare such ASO with conventional ASO with the Lecompte manoeuvre to clarify the functional implications of the spiral great arteries. METHODS The early survivors of ASO (n=130) w...

Navigator-echo controlled interleaved spiral cine coronary-artery velocity maps were acquired in eight free-breathing volunteers. Good quality data were achieved in all subjects with phasic flow being clearly demonstrated. The improved efficiency of spiral k-space coverage compared to that of more conventional spin-warp techniques resulted in a mean scan time for 256 x 256 pixel-matrix studies ...

T he first observations that placental bed defects were potentially linked to clinical outcomes such as pre-eclampsia (PE) were made nearly 50 years ago. 1 This study followed prior findings that the placental clearance of radio-labeled saline was significantly decreased in women with hypertensive gestations. 2 Histological examination of pla-centas and placental bed biopsies obtained from comp...