When correctly calibrated, gray value levels of medical images reflect physical properties. In dental X-ray imaging radioopacity of the scanned material is measured through the attenuation of the beam. The measurements are performed with an increasing resolution and bit depth. The human eye though has limited perception capabilities. Therefore, it is not possible for a human being to explore all information represented in the images. Transforming gray value levels as stipulated in the DICOM standard is designed to optimize the representation for human sight. The gray values are altered to transform gray value differences into Just Noticeable Differences (JND) when represented on high quality calibrated medical displays. In this study we explored the eye sight of dental practitioners. A variety of sight patterns detecting gray value differences was observed. Although extremely useful, a transformation such as DICOM cannot optimize the representation for all practitioners, it may even worsen the representation. Transformation of gray value levels should be made dependent on the eyesight of the practitioner.
Original languageEnglish
Title of host publicationXIV Mediterranean Conference on Medical and Biological Engineering and Computing 2016
PublisherSpringer
Pages399-402
Number of pages5
Volume57
Edition1
ISBN (Electronic)978-3-319-32703-7
ISBN (Print) 978-3-319-32701-3
StatePublished - 17 Sep 2016
EventMEDICON 2016 - Paphos, Cyprus

Conference

ConferenceMEDICON 2016
CountryCyprus
CityPaphos
Period31/03/162/04/16

    Research areas

  • Display – Representation – Gray value – DICOM – JND

ID: 28803783