DIGGER pulse

A relatively successful pulse of this kind is the DIGGER pulse (Digger is a colloquial term originating from World War I activities of the Australian infantry in digging trenches) [Dodl]. It is obtained by straightforward Fourier transformation of the B frequency profile depicted in Fig. 5.3.8(a). The longitudinal magnetization of the sample... 

Fig. 5.3.8 The DIGGER pulse, (a) Frequency profile. The quantities a and b are defined in (5.3.14), and dsuce is the slice thickness [Dodl]. (b) Radio-fi uency amplitude and gradient modulation for slice selection.

Fig, 3.3.9 INil 1) SPREAD pulses for saturation of longitudinal magnetization, (a) Saturation profile. Magnetization in the selected slice is to be preserved, (b) Efficiency of the DIGGER pulse. The response to a nonselcctive pulse applied in a c gradient is. shown as well as the same response preceded by a DIGGER pulse, (c) Time-domain profile of SPREAD pulse. 

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