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Dental Cone Beam CTDental Cone Beam CTFrank GoernerFrank Goerner

Graduate StudentGraduate Student

UT-Health Science Center San AntonioUT-Health Science Center San Antonio

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How CBCT WorksHow CBCT Works

Similar to current Similar to current CT technologyCT technology

Uses cone shaped Uses cone shaped x-ray beamx-ray beam

2-D flat panel 2-D flat panel detectordetector

Gives volumetric Gives volumetric datadata

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Advantages in Dental ImagingAdvantages in Dental Imaging

Lower dose than helical CTLower dose than helical CT

Compact designCompact design

Superior images to PanoramicSuperior images to Panoramic

Low cost Low cost

Low heat loadLow heat loadDose:

Panoramic: 6-20 µSv

CBCT: 20-70 µSv

Conventional CT: 314 µSv

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CBCT vs. PanoramicCBCT vs. Panoramic

The i-Cat CBCT

Cephalometric CBCT image

Cephalometric Panoramic image

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ShortcomingsShortcomings

Metal artifacts?Metal artifacts?

Worse low contrast detectability Worse low contrast detectability

Long scan times = motion artifactsLong scan times = motion artifacts

Slightly Inferior quality to conventional CTSlightly Inferior quality to conventional CT

Periodontal ligament spaces easily recognizable in the dental CT but not satisfactory in the CBCT

CBCT

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Applications of CBCTApplications of CBCT

Great for pre-planning for implant surgeryGreat for pre-planning for implant surgery

Virtual SurgeryVirtual Surgery

Conventional CT diagnosis at 1/5 the doseConventional CT diagnosis at 1/5 the dose

Tumor detectionTumor detection

Airway visualizationAirway visualization

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ConclusionsConclusions

CBCT offers less dose than conventional CTCBCT offers less dose than conventional CT

CBCT offers superior images and diagnosis to CBCT offers superior images and diagnosis to panoramicpanoramic

More practical than a conventional CTMore practical than a conventional CT

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ReferencesReferencesJaffray DA, Siewerdsen JH. Cone-beam computed tomography with a flat-panel imager: initial performance characterization. Med Phys Jaffray DA, Siewerdsen JH. Cone-beam computed tomography with a flat-panel imager: initial performance characterization. Med Phys 2000;27:1311-232000;27:1311-23Sukovic P. Cone beam computed tomography in craniofacial imaging.Orthod. Craniofacial Res. 6 (Suppl. 1), 2003; 31-36Sukovic P. Cone beam computed tomography in craniofacial imaging.Orthod. Craniofacial Res. 6 (Suppl. 1), 2003; 31-36Holberg C, Steinhauser S, Phillip G, Rudzki-Janson I. Cone-Beam Computed Tomography in Orthodontics: Benefits and Limitations. J Holberg C, Steinhauser S, Phillip G, Rudzki-Janson I. Cone-Beam Computed Tomography in Orthodontics: Benefits and Limitations. J Orofac Orthop 2005;66:434-44Orofac Orthop 2005;66:434-44Guerrero ME, Jacobs R, Loubele M, Schutyser F, Suetens P, van Steenberghe D. State-of-the-art on cone beam CT imaging for 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) 10:1-7preoperative planning of implant placement. Clin Oral Invest (2006) 10:1-7Zhang Y, Zhang L, Zhu XR, Lee AK, Chambers M, Dong L. Reducing Metal Artifacts in Cone-Beam CT Images by Preprocessing 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, 2007Projection Data. Int. J. Radiation Oncology Biol. Phy., Vol. 67,No. 3, pp. 924-932, 2007Tsurumachi T, Honda K. A new cone beam computerized tomography system for use in endodontic surgery. International Endodontic Tsurumachi T, Honda K. A new cone beam computerized tomography system for use in endodontic surgery. International Endodontic Journal, 40, 224-232, 2007Journal, 40, 224-232, 2007Mozzo P, Procacci C, Tacconi A, Martini PT, Andreis IAB. Eur. Radiol. 8, 1558-1564 (1998)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 Winter AA, Pollack AS, Frommer HH, Koenig L. Cone Beam Volumetric Tomography vs. Medical CT Scanners. NYSDJ 2005 June/July 28-3328-33

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