Define detective quantum efficiency (DQE) and its impact on dose efficiency.

Define detective quantum efficiency (DQE) and its impact on dose efficiency.

• A. DQE quantifies how efficiently a detector converts incoming X-ray energy into a usable image signal.
• B. DQE measures the speed at which a detector can capture successive frames.
• C. DQE quantifies how effectively a detector converts incident X-ray energy into a usable image signal; higher DQE enables better image quality at lower dose.
• D. DQE is a measure of the detector's physical size.

Answer: (C)

DQE describes how efficiently a detector converts incident X-ray energy into a usable image signal, and the practical impact is that higher DQE enables better image quality at a lower dose. In other words, when a detector has a high DQE, you get more useful signal for the same amount of radiation, so you can either improve the image quality without increasing dose or achieve the same image quality with less exposure. DQE isn’t constant across all image details; it varies with spatial frequency, meaning performance can be better at some image scales than others, which is important for understanding how dose savings translate to sharper, clearer images.

DQE describes how efficiently a detector converts incident X-ray energy into a usable image signal, and the practical impact is that higher DQE enables better image quality at a lower dose. In other words, when a detector has a high DQE, you get more useful signal for the same amount of radiation, so you can either improve the image quality without increasing dose or achieve the same image quality with less exposure. DQE isn’t constant across all image details; it varies with spatial frequency, meaning performance can be better at some image scales than others, which is important for understanding how dose savings translate to sharper, clearer images.