Another Quiz Film Edition Flashcards
It displays the radiographic density.
• Photosensitive, or capable of responding to exposure by photons
• Sensitive to the wavelengths and energies that comprise most of the electromagnetic spectrum of both light and x-rays
Film
Hard gelatin
• Protects emulsion from scratches, pressure, and contamination during handling, processing, and storage.
• Designed to be antistatic
Overcoat
—— coating is designed to glue the emulsion to the base and prevent bubbles or other distortion when the film is bent during processing or handling, or when it is wet and heated during development.
2 answers
Adhesive, substratum coating
Film base characteristics/properties:
4 answers
Flexible and tough
Stable (Dimensional Stability)
Rigid
Uniformly lucent
During manufacturing, dye is added to the base of most radiographic film to slightly tint the film ——
whyy?
Blue, this coloring reduces eyestrain and fatigue,
enhancing radiologists diagnostic efficiency and accuracy
Heart of radiographic film
Othe material with which x-rays or light photons interact.
Emulsion
Emulsion contents and its measurements?
Consists of a homogeneous mixture of gelatin and silver halide crystals.
3 to 5 um thick.
Active ingredient of emulsion?
Silver Halide Crystals
Contents of silver halide crystals, % as well
98% Silver bromide, 2% Silver iodide
interaction of x-ray and ——with these high-Z atoms ultimately results in the formation of a —— on the radiograph.
light photons, latent image
silver halide crystals may have tabular, cubic,octahedral, polyhedral, or irregular shapes.
Just remember okie
Film that uses intensifying screen
• Uses light to create image
Screen film
Direct exposure to x-rays
• Single emulsion film
• Double emulsion film
Direct exposure/Non exposure film
Silver sulfide is also known as your? this is also known as the contaminant in the silver halide crystals
Sensitivity Center
Device that converts the energy of the x ray beam into visible light
Intensifying Screen
Active ingredient of film
Silver halide crystals
Active ingredient for Intensifying screen
Phosphor
Intensifying Screen has different components, give the sequence
Protective coating-Phosphor-Reflective Layer
-Closest to the Radiographic film
-Make screen resistant to the abrasion and damage caused by handling
- Helps eliminate the build up of static electricity
-Transparent to light
Protective coating
-Active layer of the radiographic intensifying screen
——- (?)converts the x ray beam into light
Phosphor layer, Phosphor
Favorable properties of radiographic intensifying screen phosphor layer
-High atomic number
-High conversion efficiency
-Appropriate spectral matching
-minimal phosphoresence
-Not affected by heat, humidity or other environmental conditions
In the intensifying screen, what do you call the process where light is produced
Luminescence
2 types of luminescnece
Fluorescence and Phosphorescence
Difference between Phosphorescence and Luminescence
Phosphorescence is when it is during and after the stimulation, it’ll still glow
Luminescence needs the stimulation of x ray, that’s the fluorescence
-Between phosphor and base
-it effective doubles the number of light photons
Reflective layer
Reflective layer material made
Magnesium oxide and titanium dioxide
rare elements used in phosphor now, what was used before? who introduced it?
Gadolinium, Lanthanum, Yttrium
Made up of polyester
-Fartest from the radiographic film, opposite of protective coating, pinakalabas
Base
