The increase in effective brightness from output image size reduction is known as?

Minification gain refers to the increase in effective brightness that occurs when the output image size of a fluoroscopic system is reduced while keeping the input image size constant. This technique maximizes the amount of light that reaches the image receptor by reducing the area over which the light is spread.

When the size of the output image decreases compared to the input image, the number of photons per unit area increases, which enhances the brightness of the image. This principle is essential in fluoroscopy, where obtaining clear, bright images is critical for accurate diagnosis and analysis during procedures.

This effective brightness increase is a key factor in improving image quality while minimizing radiation exposure to patients. The other terms like output gain, total gain, and electronic gain describe different aspects of imaging systems but do not specifically pertain to the phenomenon of size reduction leading to increased image brightness, making minification gain the correct answer.