Abstract
A general-purpose method for the simulation of a spin- 1 2 response to a multipulse train is presented. This is used to calculate the results of tune-up sequences often used in spectrometer calibration and characterization. The method is capable of including effects arising from RF and magnetic field inhomogeneities, finite amplitude and duration of pulses, and spin relaxation for T1 = T2. The pulses may also be of arbitrary shape in amplitude and phase, allowing for the inclusion of phase glitch and finite rise-time effects. Results are presented for the usual tune-up sequences and in particular for the Haubenreisser-Schnabel sequence for tuning the transmitter phase. The effects of symmetric and asymmetric phase glitch, field inhomogeneities, etc., are illustrated by Fourier transforming the data array. This procedure produces an antiphase doublet with a splitting proportional to the transmitter phase. The accuracy of this technique in measuring small-angle phase shifts is discussed.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 188-194 |
| Number of pages | 7 |
| Journal | Journal of Magnetic Resonance, Series A |
| Volume | 106 |
| Issue number | 2 |
| DOIs | |
| State | Published - Feb 1994 |
| Externally published | Yes |
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Simulation of Multipulse Tune-up Sequences. / Barbara, Thomas.
In: Journal of Magnetic Resonance, Series A, Vol. 106, No. 2, 02.1994, p. 188-194.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Simulation of Multipulse Tune-up Sequences
AU - Barbara, Thomas
PY - 1994/2
Y1 - 1994/2
N2 - A general-purpose method for the simulation of a spin- 1 2 response to a multipulse train is presented. This is used to calculate the results of tune-up sequences often used in spectrometer calibration and characterization. The method is capable of including effects arising from RF and magnetic field inhomogeneities, finite amplitude and duration of pulses, and spin relaxation for T1 = T2. The pulses may also be of arbitrary shape in amplitude and phase, allowing for the inclusion of phase glitch and finite rise-time effects. Results are presented for the usual tune-up sequences and in particular for the Haubenreisser-Schnabel sequence for tuning the transmitter phase. The effects of symmetric and asymmetric phase glitch, field inhomogeneities, etc., are illustrated by Fourier transforming the data array. This procedure produces an antiphase doublet with a splitting proportional to the transmitter phase. The accuracy of this technique in measuring small-angle phase shifts is discussed.
AB - A general-purpose method for the simulation of a spin- 1 2 response to a multipulse train is presented. This is used to calculate the results of tune-up sequences often used in spectrometer calibration and characterization. The method is capable of including effects arising from RF and magnetic field inhomogeneities, finite amplitude and duration of pulses, and spin relaxation for T1 = T2. The pulses may also be of arbitrary shape in amplitude and phase, allowing for the inclusion of phase glitch and finite rise-time effects. Results are presented for the usual tune-up sequences and in particular for the Haubenreisser-Schnabel sequence for tuning the transmitter phase. The effects of symmetric and asymmetric phase glitch, field inhomogeneities, etc., are illustrated by Fourier transforming the data array. This procedure produces an antiphase doublet with a splitting proportional to the transmitter phase. The accuracy of this technique in measuring small-angle phase shifts is discussed.
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U2 - 10.1006/jmra.1994.1023
DO - 10.1006/jmra.1994.1023
M3 - Article
VL - 106
SP - 188
EP - 194
JO - Journal of Magnetic Resonance
JF - Journal of Magnetic Resonance
SN - 1090-7807
IS - 2
ER -