Question

Fluoroscopy based on X-ray image intensifiers is currently being superseded by two types of digital radiographybased detectors. Compare all three types of image receptor in terms of their construction and operation.

Answer 1

The X-ray image intensifier is an electronic device that converts the X-ray beam intensity pattern into a visible image suitable for capture by a video camera and displayed on a video display monitor.

Image receptor is a device that changes an x-ray beam into a visible image. An image receptor may be a radiographic film and cassette, a phosphorescent screen (used in fluoroscopy or computed radiography), or a special detector placed in a table or a bucky (used in direct digital radiography)

Sensors are the receptors for the digital image, instead of using traditional x-ray film. There are two types of digital image receptors or sensors. They include direct solid-state and indirect photo-stimulable phosphor plates (PSP) that are similar to flexible radiographic film .The solid-state technology uses different semi-conductor-based detectors 1) CCD, 2) CMOS, and 3) flat panel.