Other

Accelr8 Technology Corporation

Ddx, Inc.

H John Hanlin

Timothy W Starzl

David W Nunnery

MaryBeth Robinson

David C Amundson

A system for detecting a specific substance or analyte of interest is provided that includes one or more sensing units and an instrument for analyzing the sensing units. Each sensing unit preferably includes a substrate, an attachment layer and at least one capture layer that includes a ligand layer. In one embodiment, the attachment layer is tripartite and includes a lower binding surface held to the substrate and an upper binding surface that holds the ligand layer, together with an insulating layer disposed between these two surfaces. The lower binding surface provides a durable and stable attachment to the substrate. The upper binding surface holds the ligand layer and does not jeopardize the integrity or viability thereof. The insulating layer prevents any unwanted interaction between the lower and upper binding surfaces. Each sensing unit is supported on a test piece received by the instrument. The instrument controllably positions the test piece using marks and/or codes on the test piece. The instrument measures a difference in mass in the sensing unit in connection with determining whether or not the analyte of interest is present. A light beam is used in making this measurement. In one embodiment, multiple reflections of the light beam on the same sensing unit are utilized to improve the sensitivity of the instrument. Mass enhancement techniques are also preferably utilized to effectively amplify the detected signal that is indicative of the analyte's presence. The system can also include a device for heating, humidifying and mixing materials of the sensing units, as well as preventing cross-contamination of the sensing units.

Method for specific substance and molecule detection

A device and method for imaging an object that is situated within a fluid environment having suspended particles uses infrared illumination. In a representative application, a catheter having fiber optics is inserted into the vasculature of a patient. The fiber optics transmits infrared light to an optical head at a distal end of the catheter, which transmits the light into a bloody environment to an object to be imaged. Light reflecting from the object is collected and transmitted throughout the fiber optic to an infrared camera, so that an image is formed. Proper selection of the wavelength of infrared illumination allows objects to be imaged through what would otherwise be an opaque liquid. The invention has particular utility in the field of medical imaging.

Infrared endoscopic imaging in a liquid with suspended particles: method and apparatus

Sensing system for specific substance and molecule detection

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Louisville, CO, United States of America

H John Hanlin