MRI exhibits _______ low contrast images than CT

MRI exhibits _______ low contrast images than CT

• A. Worse
• B. The same
• C. Nonexistent
• D. Better

Answer: (D)

Contrast resolution determines how well an imaging modality can separate tissues that have only small differences in signal or density. MRI relies on the magnetic properties of hydrogen protons and various weighting sequences that emphasize differences in water content, fat, and tissue microstructure, giving much higher soft-tissue contrast than CT. Because of this, subtle differences between tissues that CT might blur become clearly visible on MRI. So MRI indeed provides better low-contrast imaging than CT. The other options don’t fit because they imply MRI is worse, the same, or lacking in contrast capability, whereas the physics of MRI gives superior differentiation of tissues with low inherent contrast.

Contrast resolution determines how well an imaging modality can separate tissues that have only small differences in signal or density. MRI relies on the magnetic properties of hydrogen protons and various weighting sequences that emphasize differences in water content, fat, and tissue microstructure, giving much higher soft-tissue contrast than CT. Because of this, subtle differences between tissues that CT might blur become clearly visible on MRI. So MRI indeed provides better low-contrast imaging than CT. The other options don’t fit because they imply MRI is worse, the same, or lacking in contrast capability, whereas the physics of MRI gives superior differentiation of tissues with low inherent contrast.