Film Construction Flashcards
is composed of multiple layers, each playing a crucial role in capturing and preserving an x-ray image.
Radiographic Film
The layers or Radiograph Film work together to ensure ____,____,____ during exposure, processing, and storage.
image quality, durability, and stability
is a multi-layered structure designed for high-quality imaging, durability, and efficient processing.
Radographic Film
plays a vital role in ensuring that x-ray films produce sharp, detailed, and long-lasting images.
supercoat, emulsion, adhesive layer, and base
is the outermost layer of a radiographic film. It is made of a thin, hard gelatin covering that encloses and protects the emulsion layer beneath it.
SUPERCOAT / OVERCOAT / PROTECTIVE LAYER
Purpose and Function of SUPERCOAT / OVERCOAT / PROTECTIVE LAYER
- Protects the emulsion from damage
o Prevents scratches, pressure marks, and contamination during handling, processing, and storage. - Allows rough handling before exposure
o The film can be handled without damaging the sensitive emulsion. - Prevents physical and chemical damage to the emulsion caused by:
o Scratches from improper handling.
o Abrasions from stacking multiple films.
o Skin oils that can transfer from hands to the film surface.
Prevents physical and chemical damage to the emulsion caused by:
Scratches from improper handling.
Abrasions from stacking multiple films. Skin oils that can transfer from hands to the film surface.
The ___ plays a critical role in ensuring the _____ of radiographic films by ____ from ____ This allows for ____while ensuring that the film withstands ___
supercoat layer
durability and longevity
protecting the delicate emulsion
physical and chemical damage
reliable image quality
handling, storage, and processing conditions.
is the core component of radiographic film, responsible for capturing the latent image during exposure to x-rays or light. This layer’s composition and structure are pivotal in determining the film’s sensitivity, contrast, and resolution.
EMULSION LAYER
Serves as a suspension medium for silver halide crystals, ensuring their even distribution.
Gelatin
is clear, allowing unobstructed passage of light, and porous, permitting processing chemicals to reach the crystals during development.
Gelatin
Its flexibility ensures the film can bend without image distortion.
Gelatin
These are the photosensitive agents within the emulsion. Upon exposure to radiation, they undergo chemical changes, forming the latent image
Silver Halide Crystals
are typically composed of silver bromide (AgBr) and silver iodide (AgI), with modern emulsions containing approximately 95-98% silver bromide and 2-5% silver iodide.
Silver Halide Crystals
The size and shape of these crystals influence the film’s speed and image quality.
Silver Halide Crystals
ensures optimal interaction between the x-rays or light photons and the silver halide crystals, balancing image resolution and film sensitivity.
Thickness of Emulsion
Types of Emulsion Film
Single Emulsion Film
Double Emulsion Film
Caoting: one side
Design: single intensifying screen
Identification: notch lower left corner emulsion side
Appearance: dull shiny
Applications: duplication mammography
Single Emulsion Film
Coating: both side
Design: enhance imaging speed
Processing: flat after processing
Applications: extremity examination
Double Emulsion Film
Gelatin is not merely a passive medium; it plays several critical roles:
Mechanical Support
Chemical Permeability
Optical Clarity
Flexibility
