Development of a compact computed tomographic apparatus for dental use

被引：465

作者：

Arai, Y ^{[1
]}

Tammisalo, E ^{[1
]}

Iwai, K ^{[1
]}

Hashimoto, K ^{[1
]}

Shinoda, K ^{[1
]}

机构：

[1] Nihon Univ, Sch Dent, Dept Radiol, Chiyoda Ku, Tokyo 101, Japan

来源：

DENTOMAXILLOFACIAL RADIOLOGY | 1999年 / 28卷 / 04期

关键词：

tomography; X-ray computed; radiography; dental;

D O I：

10.1038/sj.dmfr.4600448

中图分类号：

R78 [口腔科学];

学科分类号：

1003 ;

摘要：

Objective: To describe a compact computed tomographic apparatus (Ortho-CT) for use in dental practice. Methods: Ortho-CT is a cone-beam-type of CT apparatus consisting of a multifunctional maxillofacial imaging machine (Scanora(R), Soredex, Helsinki, Finland) in which the film is replaced with an X-ray imaging intensifier (Hamamatsu Photonics, Hamamatsu, Japan). The region of image reconstruction is a cylinder 32 mm in height and 38 mm in diameter and the voxel is a 0.136-mm cube. Scanning is at 85 kV and 10 mA with a 1 mm Cu filter. The scan time is 17 s comparable with that required for rotational panoramic radiography. A single scan collects 512 sets of projection data through 360 degrees and the image is reconstructed by a personal computer. The time required for image reconstruction is about 10 min. Results: The resolution limit was about 2.0 lp mm(-1) and the skin entrance dose 0.62 mGy. Excellent image quality was obtained with a tissue-equivalent skull phantom, roots, periodontal ligament space, lamina dura, and cancellous bone were clearly visualized. Conclusion: Ortho-CT provides three-dimensional images of excellent quality for dental use at a low entrance dose.

引用

页码：245 / 248

页数：4

共 17 条

[11] SPIRAL VOLUMETRIC CT WITH SINGLE-BREATH-HOLD TECHNIQUE, CONTINUOUS TRANSPORT, AND CONTINUOUS SCANNER ROTATION [J].

KALENDER, WA ;

SEISSLER, W ;

KLOTZ, E ;

VOCK, P .

RADIOLOGY, 1990, 176 (01) :181-183

[12]

Kanda S, 1986, ORAL RADIOL, V2, P9

[13] 3-DIMENSIONAL RECONSTRUCTION FROM RADIOGRAPHS AND ELECTRON MICROGRAPHS - APPLICATION OF CONVOLUTIONS INSTEAD OF FOURIER TRANSFORMS [J].

RAMACHANDRAN, GN ;

LAKSHMINARAYANAN, AV .

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 1971, 68 (09) :2236-+

[14]

TOYOFUKU F, 1986, MED IMAGE TECH, V4, P189

[15]

TOYOFUKU F, 1986, DENT RADIOLOGY, V26, P282

[16]

TOYOFUKU F, 1987, MED IMAGE TECH, V5, P335

[17] Three-dimensional dental imaging by spiral CT - A progress report [J].

Vannier, MW ;

Hildebolt, CF ;

Conover, G ;

Knapp, RH ;

YokoyamaCrothers, N ;

Wang, G .

ORAL SURGERY ORAL MEDICINE ORAL PATHOLOGY ORAL RADIOLOGY AND ENDODONTICS, 1997, 84 (05) :561-570

← 1 2 →