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Optical Engineering

X-ray digital intra-oral tomosynthesis for quasi-three-dimensional imaging: system, reconstruction algorithm, and experiments
Author(s): Liang Li; Zhiqiang Chen; Ziran Zhao; Dufan Wu
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Paper Abstract

At present, there are mainly three x-ray imaging modalities for dental clinical diagnosis: radiography, panorama and computed tomography (CT). We develop a new x-ray digital intra-oral tomosynthesis (IDT) system for quasi-three-dimensional dental imaging which can be seen as an intermediate modality between traditional radiography and CT. In addition to normal x-ray tube and digital sensor used in intra-oral radiography, IDT has a specially designed mechanical device to complete the tomosynthesis data acquisition. During the scanning, the measurement geometry is such that the sensor is stationary inside the patient’s mouth and the x-ray tube moves along an arc trajectory with respect to the intra-oral sensor. Therefore, the projection geometry can be obtained without any other reference objects, which makes it be easily accepted in clinical applications. We also present a compressed sensing-based iterative reconstruction algorithm for this kind of intra-oral tomosynthesis. Finally, simulation and experiment were both carried out to evaluate this intra-oral imaging modality and algorithm. The results show that IDT has its potentiality to become a new tool for dental clinical diagnosis.

Paper Details

Date Published: 7 January 2013
PDF: 9 pages
Opt. Eng. 52(1) 013201 doi: 10.1117/1.OE.52.1.013201
Published in: Optical Engineering Volume 52, Issue 1
Show Author Affiliations
Liang Li, Tsinghua Univ. (China)
Zhiqiang Chen, Tsinghua Univ. (China)
Ziran Zhao, Tsinghua Univ. (China)
Dufan Wu, Tsinghua Univ. (China)

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