What do higher values in the modulation transfer function (MTF) suggest about an imaging system?

Higher values in the modulation transfer function (MTF) indicate that an imaging system is capable of accurately transferring detail from the object being imaged to the final image. The MTF is a measure of the system's ability to reproduce contrast at different spatial frequencies, which directly correlates with image sharpness. When the MTF value is high, it means that the imaging system can maintain contrast for fine details, leading to clearer and sharper images.

Improved image sharpness is essential in many imaging applications, as it allows for better visualization of small structures and features. This characteristic is particularly important in fields like radiology, where precise diagnosis relies on the clarity of the images. Therefore, a high MTF signifies that the system is effectively preserving detail and contrast, ultimately enhancing the overall quality of the images produced.