Which MRI parameter set would produce a T2 weighted image?

Which MRI parameter set would produce a T2 weighted image?

• A. TE: 60 TR: 600
• B. TE: 200 TR: 500
• C. TE: 170 TR: 1250
• D. TE: 25 TR: 1750

Answer: (C)

T2 weighting comes from using a long echo time and a long repetition time, which makes the image contrast reflect differences in T2 decay rather than T1 recovery or proton density. The set with TE of 170 ms and TR of 1250 ms uses a relatively long TE and a long TR, so T2 differences between tissues dominate the signal while T1 contributions are minimized. The other options either use a short TE (which reduces T2 contrast), or a short TR (which keeps T1 effects strong), or a long TR with a short TE (which leans toward proton density weighting). So this combination best emphasizes T2 differences.

T2 weighting comes from using a long echo time and a long repetition time, which makes the image contrast reflect differences in T2 decay rather than T1 recovery or proton density. The set with TE of 170 ms and TR of 1250 ms uses a relatively long TE and a long TR, so T2 differences between tissues dominate the signal while T1 contributions are minimized. The other options either use a short TE (which reduces T2 contrast), or a short TR (which keeps T1 effects strong), or a long TR with a short TE (which leans toward proton density weighting). So this combination best emphasizes T2 differences.