Magnetic resonance spectroscopy and breast cancer

The magnetic resonance (MR) experiment involves the excitation of a nuclear spin system. After excitation the system returns to equilibrium and depending on the type of experiment, several types of phenomena can be measured providing chemical and/or spatial information. Different nuclei can be examined (e.g. ³¹P, ¹H and ¹³C) but the vast majority of medical MR applications observe the proton (¹H) nucleus..