radiographic film n.
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Radiographic Film. Film. X-ray films are generally mad of an emulsion-gelatin containing radiation sensitive silver halide . with a flexible, blue tented base X-ray films are sensitive to light Emulsion layers are thin so developing, fixing and drying time can be reasonable

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slide2
Film

X-ray films are generally mad of an emulsion-gelatin containing radiation sensitive silver halide.

with a flexible, blue tented base

X-ray films are sensitive to light

Emulsion layers are thin so developing, fixing and drying time can be reasonable

When gamma rays or light strike the silver halide, changes take place

selection of film
Selection of Film
  • Selection depends on a number of factors:
  • Composition, shape & size of part being examined
  • Weight and location of part being examined
  • Type of radiation used
  • Intensity of the gamma radiation; kilovoltage
  • Relative importance of high detail or quick & economical results
film packaging
Film Packaging

Radiographic film comes in most basic form as individual sheets in a box

Each sheet must be loaded into a cassette or film holder in the darkroom to protect from light exposure

Available in a variety of sizes

film packaging1
Film Packaging

Industrial X-ray films also available in an each sheet form

Sheets are in individual wrapped sheets; help prevent fingerprints and damage

film packaging2
Film Packaging
  • Packaged film is also available in rolls
  • Allows radiographer to cut the film to any length
  • Advantages?
  • Longer joints/limbs
  • Offer economic advantage
film handling
Film Handling
  • Should always be handled carefully to avoid physical strains:
  • Pressure
  • Creasing
  • Buckling
  • Friction
  • Make sure pressure is uniform
exposure vaults cabinets
Exposure Vaults & Cabinets

Self-contained units with integrated x-ray equipment

Typically shielded with steel and lead to absorb x-ray radiation

Equipped with emergency “kill buttons” that allow radiographers to shut down he system

film processing
Film Processing
  • A strict science governed by rigid rules
  • Involving:
  • Chemical concentration
  • Temperature
  • Time
  • Physical movement
  • Require high degrees of consistency and quality control
  • Can be processed by hand or machine
processing darkrooms
Processing & Darkrooms
  • An ideal radiographic image should be an accurate portrayal of the area under examination
  • Must ensure that there is:
  • Minimal image distortion
  • Contrast
  • Magnification
  • Distortion
  • Accurate positioning
exposure faults
Exposure Faults
  • Exposure chart is a useful guide
  • Try to keep patient in same position while developing film
  • Underexposure
  • Overexposure
  • Fogging
  • Lacks Contrast
  • Screen Marks
viewing radiographs
Viewing Radiographs
  • Radiographs should always be labeled with correct anatomical markers
  • Patients details and date of exam
  • Generally viewed on a light box
  • Becoming more common to digitize radiographs to be viewed on a monitor
  • Area should be clean
  • Tools (masking aids/film markers) close at hand
  • Gloves should be worn
  • Light level should be low