Energy dependence in dental imaging with Medipix2

• The possibility to achieve better contrast in dental images by selecting specific X-ray energies is investigated. By applying both the low and the high photon counting energy threshold of the Medipix2 chip only a narrow interval of the spectrum of a 60 keV standard dental source used is selected. The relative contrast between the parts of the tooth with the highest respectively lowest absorption increases 18 % when the energy spread of the X-rays is narrowed from the full spectrum to a 4 keV window centered around 36 keV. The small tail of high energy photons from the full source spectrum lowers the achieved relative contrast significantly. This result can be used in development of X-ray sources or in consideration of energy weighting.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)

Nyckelord

Dental diagnosis; X-ray; Image quality; Pixel detector; Medipix

Energy weighting

Electrical engineering, electronics and photonics

Elektroteknik, elektronik och fotonik

Publikations- och innehållstyp

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art (ämneskategori)