PROspective MOtion correction (PROMO) can prevent motion artefacts. The aim of this study was to determine whether brain structure measurements of motion-corrected images with PROMO were reliable and equivalent to conventional images without motion artefacts. The following T1-weighted images were obtained in healthy subjects: (A) resting scans with and without PROMO and (B) two types of motion scans (“side-to-side” and “nodding” motions) with and without PROMO. The total gray matter volumes and cortical thicknesses were significantly decreased in motion scans without PROMO as compared to the resting scans without PROMO (p < 0.05). Conversely, Bland–Altman analysis indicated no bias between motion scans with PROMO, which have good image quality, and resting scans without PROMO. In addition, there was no bias between resting scans with and without PROMO. The use of PROMO facilitated more reliable brain structure measurements in subjects moving during data acquisition.
Reaction of RuH2(CO)(PPh3)3 (1) with thiophene in the presence of styrene gives the novel
diruthenium complex (Ph3P)(OC)Ru(μ-(1Z,3Z)-PhCHCHCHCHS)(μ-PPh2)Ru(CO)(PPh3)
(2) with a unique bridging 4-phenyl-1,3-butadienethiolato moiety made up of the 1-thiapenta-2,4-dien-1,5-diyl and phenyl groups, which are derived from the thiophene and triphenylphosphine, respectively. Treatment of 2 on a preparative thin-layer chromatography plate
of alumina or silica gel causes Z−E isomerization of the bridging moiety to give (Ph3P)(OC)Ru(μ-(1Z,3E)-PhCHCHCHCHS)(μ-PPh2)Ru(CO)(PPh3) (5). The molecular structures
of 2 and 5 have been determined by X-ray structure analyses.
• Motion artifacts pose significant problems for VBM analyses. • PROMO correction can reduce the motion artifacts in high-resolution 3D T1WI. • The use of PROMO may improve the precision of VBM analyses.
Zero echo time (ZTE) sequence is recent advanced magnetic resonance technique that utilizes ultrafast readouts to capture signals from short‐T2 tissues. This sequence enables T2‐ and T2* weighted imaging of tissues with short intrinsic relaxation times by using an extremely short TE, and are increasingly used in the musculoskeletal system. We review the imaging physics of these sequences, practical limitations, and image reconstruction, and then discuss the clinical utilities in various disorders of the musculoskeletal system. ZTE can be readily incorporated into the clinical workflow, and is a promising technique to avoid unnecessary radiation exposure, cost, and time‐consuming by computed tomography in some cases.Level of Evidence4Technical EfficacyStage 1
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