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Date: 23 May 2012
Time: 17:01
Display screen and film processing quality assurance instruments
Densitometers
Densitometers are calibrated against a traceable Kodak step tablet which conforms to the American National Standards Diffuse Transmission Density - ANSI PH2.19-1986 and ISO 5/2-1985. If your own reference step wedge is included, we also measure and state the diffuse density measurements for this. Densitometers can be adjusted to conform to manufacturer's specification.
Sensitometers
Sensitometers - sensitometric strips are produced with typical radiographic film and manual processing under controlled conditions. The resulting film densities are measured on a traceably calibrated transmission densitometer (Type DT1405 with 3 mm aperture). A consistency check to confirm the strips are reproducible is also carried out.
Photometers
Photometers (luminance meters and illuminance, or Lux meters) are used as an essential part of image display screen quality assurance, e.g. to check conformance with the DICOM standard (GSDF). The photometers can be calibrated to a wide range of values, traceable to national standards. Luminance values offered are ~1-10,000cd.m-2 and illuminance values from ~2–17,000 lux both maintaining a colour temperature as close as possible to 2856K.
For further information, please contact:
- Tracie Such (general enquiries)
- Peter Austin (technical enquiries)
- Denise Delahunty (technical enquiries)
RRPPS
63 Melchett Road
Kings Norton Business Centre
Birmingham, B30 3HP
Telephone: 0121 627 2090/1
Fax: 0121 627 2057
Email: rrpps@uhb.nhs.uk
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