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1.
Monogr Oral Sci ; 17: 32-55, 2000.
Article in English | MEDLINE | ID: mdl-10949834

ABSTRACT

Optical coherence tomography is a new method for noninvasively imaging internal tooth and soft tissue microstructure. The intensity of backscattered light is measured as a function of depth in the tissue. Low coherence interferometry is used to selectively remove the component of backscattered signal that has undergone multiple scattering events, resulting in very high resolution images (< 15 microns). Lateral scanning of the probe beam across the biological tissue is then used to generate a 2-D intensity plot, similar to ultrasound images. This imaging method provides information that is currently unobtainable by any other means, making possible such diverse applications as diagnosis of periodontal disease, caries detection, and evaluation of restoration integrity. This chapter presents an overview of this exciting new imaging technique and its current application to dental diagnosis.


Subject(s)
Light , Mouth/anatomy & histology , Tomography/methods , Tooth/anatomy & histology , Dental Caries/diagnosis , Dental Restoration, Permanent , Humans , Image Enhancement/methods , Interferometry , Lasers , Optics and Photonics , Periodontal Diseases/diagnosis , Scattering, Radiation , Surface Properties
2.
Science ; 265(5171): 514-7, 1994 Jul 22.
Article in English | MEDLINE | ID: mdl-17781311

ABSTRACT

A soft x-ray laser (wavelength lambda = 15.5 nanometers) was used to create a moiré deflectogram of a high-density, laser-produced plasma. The use of deflectometry at this short wavelength permits measurement of the density spatial profile in a long-scalelength (3 millimeters), high-density plasma. A peak density of 3.2 x 10(21) per cubic centimeter was recorded.

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