Automatic matching of computed tomography and stereolithography data.
COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE 2019;
175:215-222. [PMID:
31104709 DOI:
10.1016/j.cmpb.2019.04.003]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2018] [Revised: 03/10/2019] [Accepted: 04/02/2019] [Indexed: 06/09/2023]
Abstract
BACKGROUND AND OBJECTIVE
Computed tomography (CT) is one of the most frequently used medical imaging methods. An important application area of CT is dental implants, which require precise inspection and analysis of oral structures. Since CT provides a precise 3D model of the teeth, bones and nerves, it can be used as a surgical guide for dental implants. Along with CT, optical 3D images called stereolithography (STL) have also been widely used. STL images obtained from optical 3D images can be used to show the 3D surfaces of oral structures. Since CT data and STL data deploy different technologies to obtain dental information, we can obtain more accurate dental implants by combining the two datasets. Since the two datasets are acquired by using different sensors, the datasets need to be registered.
METHODS
An automatic matching algorithm is proposed for CT and STL image registration, which is based on depth maps and maximum intensity projection. Then, fine tuning was performed based on volume matching.
RESULTS
When applied to real-world databases, the proposed method provided an average matching error of 2.7 mm for the upper jaw and 2.3 mm for the lower jaw with an average processing time of about 19 s.
CONCLUSIONS
The proposed method performs accurate registration of CT and STL.
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