Which aspect of an image receptor system is evaluated using a line-pairs pattern?

Which aspect of an image receptor system is evaluated using a line-pairs pattern?

• A. Detector calibration
• B. Reader calibration
• C. Spatial resolution
• D. Plate uniformity

Answer: (C)

Line-pair patterns test spatial resolution—the system’s ability to distinguish fine, closely spaced details. The pattern consists of alternating dark and light lines; as the number of line pairs per millimeter increases, the image receptor must resolve finer detail. If the lines blur together, the spatial resolution is limited, showing the receptor’s true ability to depict small structures. This is why the line-pair pattern is used to evaluate spatial resolution, rather than detector calibration, reader calibration, or plate uniformity, which relate to dose response, digitizer accuracy, or uniform image response, respectively.

Line-pair patterns test spatial resolution—the system’s ability to distinguish fine, closely spaced details. The pattern consists of alternating dark and light lines; as the number of line pairs per millimeter increases, the image receptor must resolve finer detail. If the lines blur together, the spatial resolution is limited, showing the receptor’s true ability to depict small structures. This is why the line-pair pattern is used to evaluate spatial resolution, rather than detector calibration, reader calibration, or plate uniformity, which relate to dose response, digitizer accuracy, or uniform image response, respectively.