What are standard parameters for a T1 weighted axial brain spin echo sequence?

The standard parameters for a T1 weighted axial brain spin echo sequence are characterized by a relatively short echo time (TE) and a short repetition time (TR). In T1-weighted imaging, the goal is to differentiate tissues based on their relaxation times, which is effectively achieved by using shorter TR and TE values.

The selected parameters of TE: 11.4ms and TR: 500ms indicate that the sequence is optimized for enhancing the contrast between various brain tissues, particularly to visualize structures such as gray matter, white matter, and pathologies. Short TR values allow for the full recovery of longitudinal magnetization, leading to better T1 contrast, while the short TE ensures that the data collected represent the T1 relaxation time effectively.

The other options either have too long a TR or TE, which may not provide the optimal tissue contrast expected in a T1-weighted sequence, making them less suitable. Thus, the combination of a short TE and TR in option B underscores the effectiveness of this sequence for T1-weighted imaging in the brain.