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Radiographic Film

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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Radiographic Film

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  1. Radiographic Film

  2. 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

  3. 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

  4. 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

  5. Film Packaging Industrial X-ray films also available in an each sheet form Sheets are in individual wrapped sheets; help prevent fingerprints and damage

  6. 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

  7. Film Handling • Should always be handled carefully to avoid physical strains: • Pressure • Creasing • Buckling • Friction • Make sure pressure is uniform

  8. 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

  9. 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

  10. 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

  11. 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

  12. 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

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