RADIOLOGY LECTURE 5 ~~~~~ ANKI

In X-ray imaging, overexposure results in an image that appears too dark.

In X-ray imaging, underexposure results in an image that appears too light.

Digital images allow for post-processing to adjust brightness and contrast, fixing exposure errors without a retake.

A measure of the image's ability to distinguish fine details.

Digital X-ray images are composed of tiny picture elements called pixels.

Uses silver halide crystals that darken when exposed to X-rays. Requires processing in darkroom or automated processors.

Uses sensors (e.g., CCD, CMOS) to create digital images directly. Can be solid-state or phosphor plate.

Real-time, direct digital imaging using sensors (like CCD or CMOS). Connected directly to a computer.

Indirect digital imaging; X-rays store as a latent image in a phosphor plate, then the reader converts it to a digital image.

Rapid image availability, no processing, lower radiation dose compared to film and potentially lower cost (if not considering initial sensor price).

Flexible, reusable, lower initial cost.

Requires a developing process, and therefore, a reader, after exposure, slower.

Lower radiation dose, no chemical processing, fast image production, image post-processing, easy sharing and storage.