qaqc p1

quality assurance

deals with people

QUALITY CONTROL

• deals with instrumentation and equipment

➢ more tangible and obvious than QA

➢ designed to ensure that the Radiologist is provided with an optimal image produce through good equipment performance and resulting in minimal patient dose

DARK ROOM

primary function is to protect the film from white

light and ionizing radiation during handling and

processing

8X6 ft (2.6 X 2 m)

ideally with a floor area of not less than

40 TO 60 %

humidity must be maintained within

65 TO 75 DEGREES

temp must be maintained within

10

the ventilation system should include a source of fresh air

and yield __ air changes per hour

SAFELIGHT

should provide adequate illumination without

risk of exposure to film.

✓Amber safelight filters (WRATTEN 6B)

can be used with blue‐violet‐sensitive film.

Pure red filters (GBX)

must be used with ortho film.

AMBER FILTER

transmits light with wavelengths of 550nm and

longer

RED FILTER

• transmits light with wavelengths above 600nm

• both green and blue sensitive film

40%

Static artifacts possible when humidity dips below__

EXPOSURE

Latent image created

DEVELOPMENT

Converts latent image to black

metallic silver.

WASH

Removes excess developer

LATENT IMAGE FORMATION

formed by deposits of free ( ioinized) Ag ions.

FIXING

Dissolves out unexposed silver halide crystals.

WASHING

Removes products of processing

DRY

Removes water.

RETICULATION

uneven expansion and contractions of the emulsion layer.