SecurView DX Workstation V12.0 Quality Control Manual
Chapter 1: Introduction
MAN-09466 Revision 001 Page 3
1.4 Terms and Definitions
Table 1: Terms and Definitions
cd/m
2
Candela per square meter (cd/m
2
), the standard unit of luminance. It
represents a luminous intensity of one candela radiating from a surface
whose area is one square meter. Luminance is used to specify the
brightness of computer displays.
DICOM
Digital Imaging and Communications in Medicine – an international
standard for the exchange of imaging and related information.
GSDF
Grayscale Standard Display Function, a mathematical function that
adjusts pixel brightness in order to compensate for the nonlinearity of
human visual perception. DICOM GSDF improves conspicuity of
findings in the extremes of luminance and provides a mechanism to
standardize the appearance of images on displays of different inherent
brightness and with different response curves.
LCD
Liquid Crystal Display. The technology used for displays in notebook and
other computers. Like light-emitting diode (LED) technology, LCDs allow
displays to be much thinner than cathode ray tube (CRT) technology.
Luminance
Luminance is a photometric measure of the luminous intensity per unit
area of light travelling in a given direction. It describes the amount of
light that passes through or is emitted from a particular area and falls
within a given solid angle. The International System of Units (SI) for
luminance is candela per square meter (cd/m
2
).
MQSA
Mammography Quality Standards Act. Created by the U.S. Food and Drug
Administration (FDA) and approved by the U.S. Congress in 1994, MQSA
establishes quality standards for mammography facilities. MQSA requires
mammography facilities to be accredited by the FDA or an FDA-approved
accreditation body, be certified by the FDA or the State, receive annual
MQSA inspections, and display its FDA certification in a prominent area.
QA
Quality Assurance. Generally used to describe a program of policies,
procedures, and practices intended to ensure that quality standards are
developed, maintained, and adhered to.
QC
Quality Control. Refers to one or more procedures intended to ensure that
a manufactured product or performed service complies with a defined set
of quality criteria and meets the requirements of the client or customer.
USB
Universal Serial Bus. A specification to establish communication between
devices and a host controller such as a computer. This interface can
connect a computer and add-on devices, such as media players,
keyboards, flash drives, and printers.
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