What does the abbreviation MTF stand for in radiography?

In radiography, MTF stands for Modulation Transfer Function. This term is essential in evaluating the performance of imaging systems, including digital radiography. The Modulation Transfer Function describes how well a system can reproduce the contrast of various spatial frequencies present in an image. In simple terms, it indicates how accurately the system can transfer the details from the object being imaged to the output image.

The MTF is particularly important because it reflects the ability of the system to depict fine details versus coarse details. A high MTF value at a certain spatial frequency indicates that the imaging system can reproduce those details effectively, which is critical for diagnostic accuracy. This function is often plotted as a curve, showing the MTF values across a range of spatial frequencies, helping radiographers understand the imaging system's capabilities.

The other options, while they contain various related terms, do not accurately describe the established concept used in radiography related to image quality and resolution assessment. Hence, the selection of Modulation Transfer Function as the correct answer is justified given its relevance and significance in the field of imaging.