Fluoroscopy is an important and interventional imaging tool or equipment, which is used to view dynamic images or moving internal strvaes. It gives real time imaging.Basic Principle of Fluoroscopy :The erm Fluoroscopy implies the uses of Fluoroscopy screen which fluorse when irradiated by x-ray on it.

When a patient is placed between on source of x-ray and screen, the x-ray image becomes visible light image and can be observed directly on the Fluoroscent screen or by the IITV system.

Types:

1.Direct Fluoroscopy

2. Fluoroscopy with IITV system.

In  Direct Fluoroscopy the operator faces the Fluoroscent screen itself and makes immediate observation of the images created on the screen by attenuation of x-ray beam through the patient.

The phosphors is coated upon the underlying stratum of suitably prepared sheet of cardboard or plastic.

The paxalin is attached behind the cardboard base for mechanical support. Over the front of the screen lead glass is put to prevent irradiation of as observer by primary radiation.

Disadvantages:

Less bright images

More radiation does to patient and operator

Lack of sharpness

Needs red goggles to adopt eye in dark upto 20-30 minutes.

Dark adaption is required.

Because of these drawback of Direct Fluoroscopy, image intensifiers T.V. monitoring system was invented in 1950.

Image Intensifier :In the image intensifiers  Fluoroscopy intensifying tube is associated which eleotrically and optically process the immediate  Fluoroscent image inorder to bright light.

Images intensifies is the forming electronic device that receives the image forming x-ray beams and converts it into the Visible light image of high quality.

Components:

1.Input phosphor

2.Photocathode

3.Electrostatio focusing lens

4.output phosphor

5.Anode

6.enclosure