Fluoroscopy – RAD SCI 1 Vocabulary

Vocabulary flashcards covering the major concepts, components, and performance terms from the Fluoroscopy (RAD SCI 1) lecture.

Fluoroscopy

A real-time, dynamic x-ray imaging procedure that allows visualization of anatomy in motion.

xray tube. I.i, recording system and a viewing system

what are the four parts of fluoro chain?

Fluoro chain

The four main components of a fluoroscopic system: x-ray tube, image intensifier, recording system, and viewing system.

Rods

Retinal photoreceptors that respond to low light levels and enable night (scotopic) vision.

Cones

Retinal photoreceptors that function in bright light, enabling daylight (photopic) vision and color perception.

mA range (fluoro)

Typical tube current used in fluoroscopy, approximately 0.5–5 mA.

Automatic Brightness Control (ABC)

Fluoroscopic feature that automatically adjusts kV and mA to maintain image brightness based on patient thickness.

Time

The fluoro operator is controlling

Image intensifier

Is a complex electronic Device that is a vacuum tub that converts x-rays into visible light

Input phosphor, photo cathode, electrostatic lens anode output Phosphor

5 basic parts of ii

Input phosphor

Cesium iodide layer of the I.I. that converts incident x-ray photons to visible light.

Photocathode

Cesium-antimony layer that converts light from the input phosphor into electrons.

Anode (in I.I.)

Positively charged disk with a central opening that accelerates electrons toward the output phosphor.

Output phosphor

Layer that converts the focused electrons back into visible light for display or capture.

Flux gain= Number of output light photon / number input X Ray photon

Flux gain equation

Minification gain

(Di)² ÷ (Do)².

Brightness gain

= flux gain × minification gain (typically 5,000–30,000).

= output phosphor illumination/ input exposure rate

Conversion factor equation

= Size of the input phosphor/the size used during magnification

Magnification equation

Pin Cushion and vignette

The two causes of image distortion

Pin cushion distortion

The shape distortion of the pixels at the edges of the image

Vignetting

Loss of brightness and contrast at the periphery of the fluoroscopic image, also related to the curved I.I.

Camera tube and television

The most common type of viewing system until the advent of digital flouro

Vidicon and plumbicon

2 types of camera tubes

Spot film

a 9 × 9 cm film cassette.

Cine film

70 mm or 105 mm motion-picture film used to record sequences of fluoroscopic images.