Course on Field-Noise Effects in NMR

Field-Noise Effects in NMR

A Course on the Effects of Magnetic Field Noise on Various NMR Signals.
If you are interested in this course/talk, please, contact us.

For a poster about this topic, click here.

Relator: S.Sykora. Duration: Course 5-10 hours; seminar 60-120 minutes.

I. What is field noise
- Field noise sources
- Field noise characteristics:
  - White, periodic and quasi-periodic field noise
  - Autocorrelation function
  - Amplitude and correlation time
- Expected field noise in various NMR fields:
  - (HR, LR Relaxometry, MRI, FFC, Mouse)
II. Effects of field-noise on FID's and on 1D spectra
- Single scan effects
- Effects on accumulated data:
  - FID weighing due to field-noise
  - Lineshape convolution functions
  - Accumulation efficiency impairment
  - Experimental assessment of the field noise
III. Effects of field-noise on spin echos
- Impairment of the refocussing efficiency of Hahn-echo
- Effects on multiple refocusing echos
- Negative effects on PFGSE
- 'Resonant' effects on CPMG
IV. Effects of field-noise on 2D and 3D spectra
- Explanation of t1 noise
- Quantitative characteristics of t1 noise
V. Field-noise effects in NMR relaxometry
- Near absence of effects on T₁ estimates
- Impact on T₂ and T_1ρ estimates: bias and errors
- Fighting large-amplitude field-noise in fast-field-cycling (FFC) NMR relaxometry
VI. Field-noise in magnetic resonance imaging (MRI)
- Effects on MRI images

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