Which of the following is true of magnetic resonance imaging (MRI)?
a. MRIs give the same spatial resolution as CT scans.
b. MRIs only show grey matter.
c. A variation of MRI techniques, called diffusion tensor imaging (DTI), allows visualization of brain vasculature.
d. Protons in hydrogen atoms in tissue absorb and then release energy during the MRI procedure.
e. Most clinical MR scanners have field strengths of 3 tesla.
