Optical technique whereby computerized images are produced from photons reflected back from light passing through tissue, with each tissue creating a unique spectral signature. Present studies indicate accuracy is limited to depths of 4 mm, but represents a significant improvement in diagnostic capability over surface viewing as is presently obtained in standard endoscopies. Future studies may include the use of dyes and fluorescent markers for visualization and differentiation between benign and malignant tissues. Source: Reuters as reported by Stanford University.
An in vivo imaging technique that sends out femtosecond infrared pulses and uses optical interference to sense reflections from tissue inhomogeneities.
A method of imaging that, in ophthalmology, uses light waves to provide cross-sectional views of interior eye structures. Also known as OCT.
This is a diagnostic imaging device a doctor can use to aid in the detection of glaucoma. At the present time it should not be relied upon for making a diagnosis of glaucoma in the absence of other clinical evidence.
Optical coherence tomography (OCT) is an interferometric, non-invasive optical tomographic imaging technique offering millimeter penetration (approximately 2--3 mm in tissue) with sub-micrometre axial and lateral resolution. The technique was first demonstrated in 1991 with ~30µm axial resolution. Since then, OCT has achieved sub-micrometre resolution in 2001 due to introduction of wide bandwidth light sources (sources emitting wavelengths over a ~100 nm range).