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Radiology Research and Practice
Volume 2014 (2014), Article ID 543524, 7 pages
Research Article

Low Dose X-Ray Sources and High Quantum Efficiency Sensors: The Next Challenge in Dental Digital Imaging?

1Department of Endodontology, Temple University Kornberg School of Dentistry, 3223 North Broad Street, Philadelphia, PA 19140, USA
2Oral and Maxillofacial Radiology Department, Temple University Kornberg School of Dentistry, 3223 North Broad Street, Philadelphia, PA 19140, USA
3E3 Medical, Inc., 941 Garfield Avenue, Louisville, CO 80027, USA

Received 21 August 2014; Revised 10 November 2014; Accepted 17 November 2014; Published 10 December 2014

Academic Editor: Sotirios Bisdas

Copyright © 2014 Arnav R. Mistry et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Objective(s). The major challenge encountered to decrease the milliamperes (mA) level in X-ray imaging systems is the quantum noise phenomena. This investigation evaluated dose exposure and image resolution of a low dose X-ray imaging (LDXI) prototype comprising a low mA X-ray source and a novel microlens-based sensor relative to current imaging technologies. Study Design. A LDXI in static (group 1) and dynamic (group 2) modes was compared to medical fluoroscopy (group 3), digital intraoral radiography (group 4), and CBCT scan (group 5) using a dental phantom. Results. The Mann-Whitney test showed no statistical significance in dose exposure between groups 1 and 3 and 1 and 4 and timing exposure (seconds) between groups 1 and 5 and 2 and 3. Image resolution test showed group 1 > group 4 > group 2 > group 3 > group 5. Conclusions. The LDXI proved the concept for obtaining a high definition image resolution for static and dynamic radiography at lower or similar dose exposure and smaller pixel size, respectively, when compared to current imaging technologies. Lower mA at the X-ray source and high QE at the detector level principles with microlens could be applied to current imaging technologies to considerably reduce dose exposure without compromising image resolution in the near future.