Download COMPARATIVE ANALYSIS OF CON BEAM COMPUTER

COMPARATIVE ANALYSIS OF CON BEAM COMPUTER TOMOGRAF 3D
MEDICAL AND INDUSTRIAL X-RAY FOR DENTAL IMAGING (excerpta)
Assist. Prof. CORINA CÎRCEI, MD, PhD, Titu Maiorescu University Bucharest, Str. Dâmbovnicului,
nr. 22, Sector 4, Bucureşti, Phone: +40722168141, E-mail: [email protected]
Prof. Eng. CIPRIAN RĂCUCIU, PhD, Titu Maiorescu University Bucharest, Str. Dâmbovnicului, nr.
22, Sector 4, Bucureşti, Phone:072., E-mail: [email protected]
Eng. ION TISEANU, PhD, Head of Plasma Physics and Nuclear Fusion Laboratory National Institute
for Lasers, Plasma and Radiation Physics (INFLPR), Atomistilor Str. 409, P.O. Box. MG-36, 077125,
Bucharest-Măgurele, ROMANIA, Phone: +4021-4574051, Fax : +4021-4574243,
E-mail:
[email protected]; Web: http://tomography.inflpr.ro
Eng. ADRIAN SIMA, Plasma Physics and Nuclear Fusion Laboratory National Institute for Lasers,
Plasma and Radiation Physics (INFLPR), Atomistilor Str. 409, P.O. Box. MG-36, 077125, BucharestMăgurele, ROMANIA, Phone: +4021-4574051, Fax : +4021-4574243, E-mail: [email protected]
THE OBJECTIVE OF THE STUDY
The primary endpoint of this study is the assesment of the medical radiology in relation to the
actual morphology of three-dimensional root canal system (endodontic space).
To achieve its primary objective, the study will be organized around two main tasks:
a) Obtain radiological images of endodontic space by a conventional medical Cone Beam
Computer Tomograph and by means of an Industrial X-Ray microtomograph
b) Comparison of the relevant images obtained by the two means.
DESCRIPTION OF THE EXPERIMENTAL RESEARCH
Through this study we intend to investigate the ability of the medical imaging methods to accurately
reveal details of the human teeth endodontic space.
MATERIALS AND METHOD
1. We chose a real case of a patient M.O. with definite indication for the extraction of the
third molar in the quadrant I - 18, due to malposition eruption and occlusal trauma cause.
2. The area of intervention has underwent a clinical and imagistic evaluation by Con Beam Computer
Tomograph Planmeca 2011.
3. After the extraction the third molar was preserved in formalin for further investigations.
It woth noting that the tooth show no coronary or root cavities or fillings.
4. We chose an industial X-ray microtomograph developed in the National Institute for Laser, Plasma and
Radiation Physics - Măgurele to obtain highly accurate 3D reconstructions of the endodontic space.
X-ray microtomography scanning of the extracted tooth and image data processing with 3D X-Ray
Industrial Microtomograph
• This reconstruction was performed with the cone-beam Filtered Backprojection algorithm (FDK
Method).
• Reconstructed volumes of 1024 x 1024 x 1024 voxels allow visualization and measurement of
the minimum dimensions of 0.0146 mm on any axis.
• The image processing protocol to obtain the 3D images of the root canal space is based on
thresholding and segmenting the reconstructed volume and was performed with the VGStudio
MAX software, version 2.2. (http://www.volumegraphics.com/en/products/vgstudio-max )
• In the radiological images obtained with the medical tomograph the voxel size is 320 µm while
the industrial microtomograph images are resolved to a voxel size of 14.6 µm, i.e.
approximatively 20 times smaller
CONCLUSIONS
1. Advanced X-Ray microtomography combined with powerfull data processing software made it
possible to obtain superior images with enhanced resolution of about 20 times over those obtained
through conventional medical imaging. At the same time the microtomographic scanner were able
to provide realistic 3D images of the actual morphology of the endodontic space.
2. The medical Con Beam Computer Tomograph does not have the capacity to allow viewing
certain details, unlike a scan with the industrial microtomograph.
3. Comparing the imagings results, with radiation doses involved in the investigation, imposes the
need to explore other methods of dental imaging investigations.