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A.3 Example of barcode symbologies
The barcode samples shown here are for illustration purposes only. If printed out, they can be
used to check the barcode scanner. However, they are not meant to be used as a reference for
size or resolution of real patient or operator ID barcodes. When creating patient or operator bar-
codes always refer to the relevant standards ISO/IEC 15416 and 15415 for size and resolution
requirements and to the specification listed below.
WARNING
Avoidance of incorrect EAN 13 and Interleaved 2/5 barcode
readings
EAN 13 and Interleaved 2/5 barcodes, although widely used, are not
recommended for patient/operator barcodes.
If an EAN 13 or Interleaved 2/5 barcode is read incorrectly, this may lead
to patient misidentification and therefore to inappropriate therapy
decisions. If used nonetheless:
■ make sure that the very highest quality standards of barcode creation
and reproduction are applied
■ for EAN13: do not use the start sequences 978 (ISBN) and 979 (ISMN)
as they will be ignored as a part of any ID code
Recommended Specification Remarks
Print resolution 300 dpi preferred
200 dpi minimum
At 200 dpi issues with the wide-to-
narrow ratio may exist.
Reflective contrast 70% or greater Matte finish is preferred over gloss
finish.
Symbol grade Grade C or above
Grade B is preferred
Symbol grades are A-F based on
analysis of several quality elements.
Depending on quality grade
parameters for a specific bar code,
grade C may not be sufficient
when motion, reflection, or poor
lighting occur.
Module width
(minimum)
0.16 mm (linear barcodes)
0.20 mm (2D barcodes)
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