Biomedical subjects

Pierre Lane

Publications and source records attributed to Pierre Lane.

4 recordsLinked to original sources

PubMed2007

Direct fluorescence visualization of clinically occult high-risk oral premalignant disease using a simple hand-held device.

BACKGROUND: A considerable proportion of oral cancer and precancer is not clinically apparent and could contribute significantly to the late diagnosis and high mortality of oral cancer. A simple method to identify such occult change is needed. METHODS: Patients in the Oral Dysplasia Clinics at British Columbia are currently being examined with a simple hand-held device that permits the direct visualization of alterations to autofluorescence in the oral cavity. Tissue showing loss of autofluorescence is biopsied. RESULTS: We present 3 representative cases in which occult lesions were identified with fluorescence visualization during longitudinal follow-up, resulting in the diagnosis of a primary dysplasia in case 1, a second primary cancer in case 2, and cancer recurrence in case 3. CONCLUSIONS: This is the first report of the diagnosis of occult oral disease using a simple noninvasive device. These early examples indicate the potential value of this technology to guide the management of patients with oral lesions, facilitating the detection of high-risk changes not apparent with white-light visualization.

Adult↗

PubMed2005

Spectrally programmable light engine for in vitro or in vivo molecular imaging and spectroscopy.

A spectrally and temporally programmable light engine can create any spectral profile for hyperspectral, fluorescence, or principal-component imaging or with medical photonics devices employing spectroscopy, microscopy, and endoscopy. Multispectral imaging feasibility was demonstrated by capturing nine images at wavelengths from 450 to 650 mm (25-nm FWHM) with a CCD-camera-equipped bronchoscope coupled to the light engine. Selected wavelength regions were combined to produce a color endoscopy image.

Bronchoscopes↗

PubMed2004

In vivo pathology: microendoscopy as a new endoscopic imaging modality.

Confocal microendoscopy permits direct observation of pathologic change at the microscopic level rather than traditional inference based on indirect changes at the macroscopic (cell) level. The main benefit includes earlier detection of precancerous and cancer conditions through improved biopsy selection and examination and more cost-effective solutions to screening and surveillance. Numerous outstanding research and commercial groups with varying approaches to confocal microendoscopy are allocating significant efforts to making the technology commercially available. The initial instruments will likely be geared toward screening for and surveillance of esophageal and colon-related conditions. Future developments related to greater functionality, improved ease of use, and automated analysis are likely to facilitate adoption and use of the technology. Clinical gastroenterologists should look forward to the potential of confocal microendoscopy as a logical and needed modality to advance the field of gastroenterology.

Animals↗

PubMed2004

Optical computed-tomographic microscope for three-dimensional quantitative histology.

A novel optical computed-tomographic microscope has been developed allowing quantitative three-dimensional (3D) imaging and analysis of fixed pathological material. Rather than a conventional two-dimensional (2D) image, the instrument produces a 3D representation of fixed absorption-stained material, from which quantitative histopathological features can be measured more accurately. The accurate quantification of these features is critically important in disease diagnosis and the clinical classification of cancer. The system consists of two high NA objective lenses, a light source, a digital spatial light modulator (DMD, by Texas Instrument), an x-y stage, and a CCD detector. The DMD, positioned at the back pupil-plane of the illumination objective, is employed to illuminate the specimen with parallel rays at any desired angle. The system uses a modification of the convolution backprojection algorithm for reconstruction. In contrast to fluorescent images acquired by a confocal microscope, this instrument produces 3D images of absorption stained material. Microscopic 3D volume reconstructions of absorption-stained cells have been demonstrated. Reconstructed 3D images of individual cells and tissue can be cut virtually with the distance between the axial slices less than 0.5 microm.

Algorithms↗