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Oral Surg Oral Med Oral Pathol Oral Radiol. 2013 Jun;115(6):e55-61. doi: 10.1016/j.oooo.2013.03.007.

Contrast curves of five different intraoral X-ray sensors: a technical note.

Author information

1
Department of Oral Surgery, University Medical Center, Mainz, Germany. bruellmd@uni-mainz.de

Abstract

OBJECTIVES:

The aim of this article is to compare the contrast and resolution properties of five different sensors using a known technical target.

METHODS:

Stripe patterns with defined amounts of line pairs per mm (2.5-20 LP/mm) were recorded using five commercial digital sensors. Image data were analyzed using ImageJ and MatLab to calculate different contrast curves using logistic regression.

RESULTS:

The Dexis Platinum Sensor reached a calculated 10% contrast at 29.52 LP/mm. The Duerr VistaRay 6 Sensor reached a 10% contrast at 9.9 LP/mm. The 10% contrast was found at 18.8 LP/mm for the Duerr VistaRay 7. The Sirona Xios+ Sensor reached a calculated 10% contrast at 13.9 LP/mm. The Sirona Fullsize charge-coupled device (CCD) Sensor exhibited 10% contrast at 10.3 LP/mm.

CONCLUSIONS:

The contrast transfer function assessment used in the study confirmed that the spatial frequency at 10% contrast was much lower than the theoretical resolution computed from the pixel size.

PMID:
23706925
DOI:
10.1016/j.oooo.2013.03.007
[Indexed for MEDLINE]

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