A 1.5T MRI chamber has a linear slice select gradient of 430 Gauss/cm centred in the middle of the chamber, and you would like to image a person's Thyroid with 90 image slices (slice 45 is at z=0). Gyromagnetic ratio (g/2p = 42.58MHz/T) If the applied RF pulses have a bandwidth of 70kHz: a) What is the slice thickness? b) What is the "z" location of slice 18 relative to slice 45 (z=0)? c) What is RF pulse frequency of slice 18