Transcript Dental Cone Beam CT - Research Imaging Institute

Dental Cone Beam CT
Frank Goerner
Graduate Student
UT-Health Science Center San Antonio
1
/7
How CBCT Works
Similar to current
CT technology
Uses cone shaped
x-ray beam
2-D flat panel
detector
Gives volumetric
data
2 /7
Advantages in Dental Imaging
Lower dose than helical CT
Compact design
Superior images to Panoramic
Low cost
Low heat load
Dose:
Panoramic: 6-20 µSv
CBCT: 20-70 µSv
Conventional CT: 314 µSv
3 /7
CBCT vs. Panoramic
Cephalometric CBCT
image
Cephalometric Panoramic
image
The i-Cat CBCT
4 /7
Shortcomings
Metal artifacts?
Worse low contrast detectability
Long scan times = motion artifacts
Slightly Inferior quality to conventional CT
CBCT
Periodontal ligament spaces easily recognizable in the
dental CT but not satisfactory in the CBCT
5 /7
Applications of CBCT
Great for pre-planning for implant surgery
Virtual Surgery
Conventional CT diagnosis at 1/5 the dose
Tumor detection
Airway visualization
6 /7
Conclusions
CBCT offers less dose than conventional CT
CBCT offers superior images and diagnosis to
panoramic
More practical than a conventional CT
7 /7
References
Jaffray DA, Siewerdsen JH. Cone-beam computed tomography with a flat-panel imager: initial performance characterization. Med Phys
2000;27:1311-23
Sukovic P. Cone beam computed tomography in craniofacial imaging.Orthod. Craniofacial Res. 6 (Suppl. 1), 2003; 31-36
Holberg C, Steinhauser S, Phillip G, Rudzki-Janson I. Cone-Beam Computed Tomography in Orthodontics: Benefits and Limitations. J
Orofac Orthop 2005;66:434-44
Guerrero ME, Jacobs R, Loubele M, Schutyser F, Suetens P, van Steenberghe D. State-of-the-art on cone beam CT imaging for
preoperative planning of implant placement. Clin Oral Invest (2006) 10:1-7
Zhang Y, Zhang L, Zhu XR, Lee AK, Chambers M, Dong L. Reducing Metal Artifacts in Cone-Beam CT Images by Preprocessing
Projection Data. Int. J. Radiation Oncology Biol. Phy., Vol. 67,No. 3, pp. 924-932, 2007
Tsurumachi T, Honda K. A new cone beam computerized tomography system for use in endodontic surgery. International Endodontic
Journal, 40, 224-232, 2007
Mozzo P, Procacci C, Tacconi A, Martini PT, Andreis IAB. Eur. Radiol. 8, 1558-1564 (1998)
Winter AA, Pollack AS, Frommer HH, Koenig L. Cone Beam Volumetric Tomography vs. Medical CT Scanners. NYSDJ 2005 June/July
28-33
Questions?
8 /7