MRI EQUIPMENT Essentials

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• Three sets required for x,y,z directions • z - direction of main field •Helmholtz configuration Gradient Coils • x and y direction • Golay or saddle coils Gradient Coils 10
Radiofrequency (RF) coils • Essential to put radiowaves into patient and to detect signal from precessing protons • Should only excite protons within volume of interest • Ideally in close proximity to maximise signal detection • May be transmit/receive or receive only • RF amplifiers - 20kW Radiofrequency (RF) coils • Built-in body coil • Anatomy specific coils - better SNR, less heating –Head –Neck –Extremity –Spine –Breast 11
Page 1 and 2: MRI EQUIPMENT SG 2002 • Room Esse
Page 3 and 4: Not essential but nice to have •
Page 5 and 6: Static magnetic field • Main fiel
Page 7 and 8: • Superconducting (
Page 9: Magnet isocentre 0.98T 1.0T 1.02T G
Page 13 and 14: Phased Array Coils • Array of sur
Page 15 and 16: Field homogeneity • Uniformity of
Page 17: References • Boddy J (1999) High

MRI EQUIPMENT Essentials

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