Intraoral radiograph, panoramic radiograph, and cone beam CT (CBCT) are most important imaging modalities in dentistry. The development of arm-type CBCT has paved the way for the general dentist to own CT. Moreover, clinical application of surgical simulation and navigation system with 3D CT imaging is getting popular.
However in compare with medical whole-body CT, dental CBCT has several disadvantages in the accuracy of CT value. These are projection data discontinuity related artifact, x-ray beam hardening phenomenon, halation of x-ray detector, scattered x-ray and so on.
The highly sensitive photon-counting x-ray detector will provide new functions to panoramic radiography, such as the tomosynthesis technique and energy quantitative radiography. Tomosynthesis imaging enables clear depiction of teeth without blurry. This image may take place of intraoral radiograph. Energy quantitation may enable the image-based quantity and quality analysis of hard tissue anatomy and/or restorative dental materials in vivo. In addition, coordinating application of computer-aided detection/diagnosis (CAD) and teleradiology will enhance the diagnostic capabilities of dental practitioners.
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