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Dental Cone Beam CT

Dental Cone Beam CT. Frank Goerner Graduate Student UT-Health Science Center San Antonio. How CBCT Works. Similar to current CT technology Uses cone shaped x-ray beam 2-D flat panel detector Gives volumetric data. Advantages in Dental Imaging. Lower dose than helical CT Compact design

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Dental Cone Beam CT

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  1. Dental Cone Beam CT Frank Goerner Graduate Student UT-Health Science Center San Antonio /7

  2. How CBCT Works • Similar to current CT technology • Uses cone shaped x-ray beam • 2-D flat panel detector • Gives volumetric data /7

  3. 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 /7

  4. CBCT vs. Panoramic Cephalometric CBCT image Cephalometric Panoramic image The i-Cat CBCT /7

  5. Periodontal ligament spaces easily recognizable in the dental CT but not satisfactory in the CBCT CBCT Shortcomings • Metal artifacts? • Worse low contrast detectability • Long scan times = motion artifacts • Slightly Inferior quality to conventional CT /7

  6. Applications of CBCT • Great for pre-planning for implant surgery • Virtual Surgery • Conventional CT diagnosis at 1/5 the dose • Tumor detection • Airway visualization /7

  7. Conclusions • CBCT offers less dose than conventional CT • CBCT offers superior images and diagnosis to panoramic • More practical than a conventional CT /7

  8. 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? /7

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