Proteinaceous material is which signal intensity on T2?

Proteinaceous material is which signal intensity on T2?

• A. Dark
• B. Isointense
• C. Very bright
• D. Bright

Answer: (D)

On T2-weighted MRI, signal intensity tracks how long protons keep their transverse magnetization. Fluids with high water content and mobile protons—like edema or simple fluid—have a long T2 and appear bright. Proteinaceous material contains water and mobile protons too, so its T2 is relatively long and it tends to show bright signal compared with surrounding brain tissue. It isn’t typically as dark as certain solids or as uniformly intense as CSF, but the usual description is bright. This is why the correct choice is Bright.

On T2-weighted MRI, signal intensity tracks how long protons keep their transverse magnetization. Fluids with high water content and mobile protons—like edema or simple fluid—have a long T2 and appear bright. Proteinaceous material contains water and mobile protons too, so its T2 is relatively long and it tends to show bright signal compared with surrounding brain tissue. It isn’t typically as dark as certain solids or as uniformly intense as CSF, but the usual description is bright. This is why the correct choice is Bright.