Conventional Fluoroscopy

History of Fluoroscopy

Fluoroscopy was invented by Thomas C. Edison, with the first commercial fluoroscope available in 1896, producing faint images and requiring dark adaptation.

Image Intensification

A process involving several components: input phosphor, photocathode, electrostatic focusing lenses, and output phosphor, which collectively enhance the brightness and clarity of the imaging.

Electrostatic Focusing Lenses

Charged plates in the image intensifier that repel electrons and focus them toward the output phosphor using electrostatic repulsion.

Output Phosphor

The final component of the image intensifier that absorbs electrons and emits multiple light photons, greatly increasing image brightness compared to the input phosphor.

Camera Tube

A device attached to the image intensifier that converts the light signal from the output phosphor into an electronic signal for processing and display.

Minimum Source-to-Skin Distance

The requirement that the distance between the x-ray tube and the patient’s skin must not be less than 30 cm to ensure patient safety.

Fluoroscopic Mode vs. Radiographic Mode

In fluoroscopic mode, low mA (2-5 mA) is used for real-time imaging, whereas in radiographic mode, high mA (100-1200 mA) is utilized for capturing static images.

Photospot Camera

A device that allows radiologists to view and record images while they are being recorded, improving accuracy and quality of assessment.