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Development of a compact computed tomographic apparatus for dental use
1Department of Radiology, Nihon University School of Dentistry, Tokyo, Japan.
Dento Maxillo Facial Radiology
|August 24, 1999
Summary
A new dental computed tomographic apparatus, Ortho-CT, offers excellent 3D imaging quality for dental applications. This compact device provides clear visualization of dental structures at a low radiation dose.
Area of Science:
- Dental Imaging
- Computed Tomography
- Medical Device Technology
Background:
- Traditional dental imaging methods have limitations in providing detailed 3D visualization.
- Advancements in computed tomography (CT) technology offer potential for improved diagnostic capabilities in dentistry.
Purpose of the Study:
- To introduce and describe the Ortho-CT, a novel compact computed tomographic apparatus designed for dental practice.
- To evaluate the imaging performance and radiation dose of the Ortho-CT system.
Main Methods:
- The Ortho-CT utilizes a cone-beam CT approach with an X-ray imaging intensifier.
- Image reconstruction is performed on a personal computer, with a scan time comparable to panoramic radiography.
- The apparatus features a 32 mm height and 38 mm diameter reconstruction region with a 0.136-mm voxel size.
Main Results:
- The Ortho-CT achieved a resolution limit of approximately 2.0 lp mm-1.
- Excellent image quality was demonstrated, clearly visualizing dental structures like roots, periodontal ligament space, lamina dura, and cancellous bone.
- The skin entrance dose was measured at a low 0.62 mGy.
Conclusions:
- The Ortho-CT system delivers high-quality three-dimensional dental images.
- Its compact design and low entrance dose make it suitable for routine dental use.
- This technology represents a significant advancement in dental diagnostic imaging.