Which parameter set would produce a T2 weighted image?

Which parameter set would produce a T2 weighted image?

• A. TE: 60 TR: 600
• B. TE: 25 TR: 1500
• C. TE: 100 TR: 800
• D. TE: 200 TR: 2000

Answer: (D)

T2 weighting is achieved by letting transverse relaxation differences dominate, which happens when both the echo time and the repetition time are long. A long TE allows more T2 decay to influence the signal, making tissues with longer T2 appear brighter, while a long TR minimizes T1 effects so the contrast reflects T2 properties more than T1. Among the options, the set with the longest TE and the longest TR yields the strongest T2 weighting. A TE of 200 ms and a TR of 2000 ms provide ample T2 decay contribution and reduce T1 influence, producing a clear T2-weighted image. The other sets have shorter TE and/or TR, so they emphasize T1 or proton density more than T2.

T2 weighting is achieved by letting transverse relaxation differences dominate, which happens when both the echo time and the repetition time are long. A long TE allows more T2 decay to influence the signal, making tissues with longer T2 appear brighter, while a long TR minimizes T1 effects so the contrast reflects T2 properties more than T1.

Among the options, the set with the longest TE and the longest TR yields the strongest T2 weighting. A TE of 200 ms and a TR of 2000 ms provide ample T2 decay contribution and reduce T1 influence, producing a clear T2-weighted image. The other sets have shorter TE and/or TR, so they emphasize T1 or proton density more than T2.