Journal of Northeastern University Natural Science ›› 2015, Vol. 36 ›› Issue (5): 636-640.DOI: 10.12068/j.issn.1005-3026.2015.05.007

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QCT Method Based on Liquid Phantoms for Jaw Bone Density Measurement Using Oral CT

CHEN Xiao-zhao1, FU Quan-hai1, SUN Zhi-yong2, KANG Yan1   

  1. 1. School of Sino-Dutch Biomedical & Information Engineering, Northeastern University, Shenyang 110819, China; 2. Liaoning Medical Device Test Institute, Shenyang 110179, China.
  • Received:2014-04-04 Revised:2014-04-04 Online:2015-05-15 Published:2014-11-07
  • Contact: KANG Yan
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Abstract: The current four most commonly used methods to evaluate the jaw bone mineral density was summarized, and the shortage of these methods was analyzed. Quantitative computed tomography (QCT) method was proposed and used for oral cone beam CT (CBCT) based on K2HPO4 liquid phantoms, and specific measurement method was described. Meanwhile the K2HPO4 liquid phantoms uniformity, the linearity, and the stability were tested, and were contrasted with the solid phantoms. The test results showed that the CBCT bone density measurement results based on K2HPO4 liquid phantoms were equivalent with the results of the conventional CT based on solid phantoms. Meanwhile, in view of the low production costs, convenient and flexible configuration, this method was worthy of clinical promotion and application.

Key words: CBCT, QCT method, jaw bone mineral density, K2HPO4 liquid phantoms, Ca5OH(PO)4 solid phantoms

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