Construct · 1 fields · 1 citations

shim: a standalone construct

One name. One construct. A landmark on the map.

● anchor · a standalone construct Nearest construct by meaning·not indexed
shim1 CONSTRUCTField shimGOLAY · 1958

A single standalone construct; nearby constructs are located against it in the Collider. Tap a field for its definition, unit, and measures.

Magnetic resonance

making a magnetic-resonance instrument's static field uniform across the sample by adjusting currents in correction coils.

In magnetic-resonance instrumentation, to shim is to make the static magnetic field uniform across the sample by adjusting the currents in a set of correction coils (the shim coils) that cancel the field's spatial variations. Golay (1958) designed such field-homogenizing coils for nuclear-spin-resonance instruments, giving the term its technical meaning. The referent is the correction of magnetic-field inhomogeneity (originally by physical metal shims on the magnet, now mostly by coil currents that bear the same name), unrelated to an alignment spacer or a lock tool beyond the idea of a small correction that makes things line up.[1]

Unit
The uniformity of the static magnetic field across the sample
Recovery means
Not applicable
Measured by
Assessed by field homogeneity, such as resonance linewidth, as shim-coil currents are tuned

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Nearby constructs

alignment6 fields · 12 citationsjingle · one name, six constructsassembly1 fields · 1 citationsanchor · a standalone constructcancel1 fields · 1 citationsanchor · a standalone construct

References

  1. Golay, M. J. E. (1958). Field homogenizing coils for nuclear spin resonance instrumentation. Review of Scientific Instruments, 29(4), 313–315. https://doi.org/10.1063/1.1716184

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