pre-saturation

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pre-saturation

A specialised MRI technique that uses repeated radio frequency excitation of structures adjacent to the region of interest to reduce or eliminate phase-effect artefacts.
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1,7,9) MRI findings include a synovial mass, fat signal intensity on all sequences, suppression of signal with fat-selective presaturation, joint effusion, and absence of MRI supporting hemosiderin.
Role of spectral presaturation attenuated inversion-recovery fat-suppressed T2-weighted MR imaging in active inflammatory bowel disease.
1]H NMR spectra were acquired at 300K using the Carr-Purcell-Meiboom-Gill (CPMG) spin-echo pulse sequence with presaturation, with a total spin-echo delay (2n[tau]) of 100 msec to attenuate broad signals from proteins and lipoproteins.
T2 spectral presaturation inversion recovery" (SPIR) teknigi ile yapilan bir calismada PMR'li hastalarda ekstrakapsuler degisiklikler RA hastalarina gore daha sik izlenirken, sinovit, tenosinovit ve bursit olanlari benzer bulunmustur (43).
This scan sequence is typically a 30-40 mm-thick single shot, turbo spin echo, with long TR (8 000 msec) and long TE (1 000 msec) and spectral presaturation inversion recovery (SPIR) fat suppression.
This approach is adopted by methods such as presaturation [32], jump-return [33], and other binomial sequences for spin excitation [34-36].
A 1-dimensional longitudinal eddy current bipolar gradient pulse presaturation with 2 stimulated echoes, diffusion-edited NMR experiment was performed with a diffusion time of 0.
A presaturation experiment was applied to decrease an intense signal and observe the baseline in detail.
Because both sexes disperse and risk of inbreeding does not varying with population density, presaturation dispersal in roe deer most likely is caused by mate competition in males and resource competition in females.
Also, the chemicals used in the presaturation solution must conform to certain purity requirements such as reagent, semiconductor or USP grade.
In a soil humic acid sample, they discovered some peaks attributed to methyl and methene that were invisible in normal 1-dimensional spectra because of presaturation.
1]H pulse with a selective presaturation pulse applied during the relaxation decay to the HDO resonance.