Final answer:
In an MRI scan, the receiver coil collects signal data and stores it in k-space. The reception of reemitted radio waves as a function of frequency provides position information, and the intensity of the radio waves is proportional to the concentration of the nuclear type being flipped.
Step-by-step explanation:
In an MRI scan, radio waves are used to create images of the body. The receiver coil collects the signal data and stores it in k-space. The process begins by varying the magnetic field, causing the resonant frequency of protons in the body to vary with position. Radio frequencies are then swept over the body, and the protons absorb and reemit them only if they are in a magnetic field with the correct strength.
The imaging receiver gathers information point by point, building up a tissue map. The reception of reemitted radio waves as a function of frequency provides position information, and the intensity of the radio waves is proportional to the concentration of the nuclear type being flipped. This information is stored in k-space, which is a mathematical representation of the raw data collected.