An introduction to NMR imaging: From the Bloch equation to the imaging equation

Methodology of magnetic resonance imaging

“…The sensitive line or multiple sensitive-point (MSP) technique, suggested by Hinshaw (Hinshaw, 1983;Andrew et al 1977), is a straightforward extension of the sensitive-point method. Instead of three time-varying gradients, only two time-varying gradients are used and a static-field gradient is applied along the 2-axis as shown in Fig.…”

Triple-quantum filtered NMR imaging of sodium in the human brain

“…When the magnetic field gradient is removed, the phases of the nuclear spins are distributed in a helical fashion. The spatial frequency of the helical distribution is tighter for larger gradients or A magnetic field gradient following a RF pulse and 'preceding the NMR sampl~ng is referred to as a phase encode gradient [58], see An advantage of using phase encode gradients in NMR imaging is that the NMR signal at each k-space point is frequency encoded only with spectroscopic information. This fact is the basis for chemical-shift imaging: A disadvantage of using phase encode gradients for NMR imaging is that· only one k-space point is collected with each FID.…”

“…This kind of gradient is called a read-out gradient [58], see Figure 5.5. When using a read-out gradient a dephasing gradient is applied after the RF pulse and before the sampling.…”

Interactive reconstruction via geometric probing

“…Since sound needs matter to travel though, there are strong interactions with physical properties of the tissue to measure. Nuclear magnetic resonance [40] or NMR immerses patients in a magnetic field and measures variations in the field resulting from molecular interactions. These interactions depend upon the molecular properties of the material.…”