MRI take home point (5)

• T1-weithted SE images are achieved with TR set near the T1 values of tissues of interest, with very short TE values to minimize T2-weithting.
• T2-weighted SE images are achieved by setting TR very long to minimize T1-weighting and setting TE near the T2 values of tissues of interest.
• Spin-density-weighted SE images are achieved by setting TR long and TE very short.
• Dual-echo pulse sequence can be used to produce Spin-density and T2-weighted images from the first and second echoes during the same TR, respectively.
• K-space is the best way to descript how MRI data are sampled.