What does short t 1 short t2 signal shadow mean?

In magnetic resonance imaging, short T 1 short T2 signal shadow is generally close to water, so it is considered as local edema or cystic change. Magnetic resonance imaging has a good resolution for soft tissues.

The examination of bladder, rectum, uterus, vagina, bones, joints and muscles is better than CT. But the examination of lung is not superior to X-ray or CT, and the examination of liver, pancreas, adrenal gland and prostate is not superior to CT.

Extended data:

T 1T2 weighting:

The so-called weighting is "protrusion", T 1 weighted imaging (T 1WI)- protruding tissue t 1 relaxation (longitudinal relaxation) difference; T2-weighted imaging (T2WI)-Highlight the T2 relaxation (transverse relaxation) difference of tissues.

Image characteristics of 1 and T 1: The shorter the tissue T 1, the faster the recovery and the stronger the signal; The longer the tissue T 1, the slower the recovery and the weaker the signal. Characteristics of T2 image: The longer the tissue T2, the slower the recovery and the stronger the signal; The shorter T2, the faster recovery and the weaker signal.

2.T 1 is a good anatomical structure; T2 showed that the tissue lesions were good, sensitive to bleeding, with relatively few artifacts (but patients were easy to exercise because of the long imaging time), and the imaging speed was slow. Long T 1 is black and short T 1 is white; The long T2 is white and the short T2 is black.

References:

Baidu Encyclopedia-Weighted Pictures