Radiographic Film - Mukwonago Area School District
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Transcript Radiographic Film - Mukwonago Area School District
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
-
-
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
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
Industrial
X-ray films also available in an
each sheet form
Sheets are in individual wrapped sheets;
help prevent fingerprints and damage
Packaged
film is also available in rolls
Allows radiographer to cut the film to any
length
Advantages?
- Longer joints/limbs
- Offer economic advantage
Should
always be handled carefully to
avoid physical strains:
- Pressure
- Creasing
- Buckling
- Friction
Make sure pressure is uniform
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
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
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
chart is a useful guide
Try to keep patient in same position
while developing film
- Underexposure
- Overexposure
- Fogging
- Lacks Contrast
- Screen Marks
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