摘要:
A Raman spectrum is measured inside animal tissue, such us human skin tissue, at a selected depth from a surface the tissue. A pH value is computed using a function that assigns a pH value as a function of the measured Raman spectrum. The computation may involve computing a number representing a ratio of concentrations of a protonated and a deprotonated version of a chemical substance from the Raman spectrum and generating pH information on the basis of said number. The chemical substance is for example a form of Urocanic acid (UCA). UV exposure is measured from the weight of the spectrum of cis-UCA.
摘要:
The present invention describes the provision of an internal control in analytical techniques involving labeling of analytes, such as SERRS, for detection of an analyte, particularly a biomolecule in a sample, with improved accuracy.
摘要:
The present invention relates to a spectroscopic apparatus for non-invasive in vivo analysis of blood and to a corresponding analysis method, in particular for direct determination of the pH value of the blood. From a Raman signal detected from an excited target region containing blood at least one predetermined pH sensitive signal portion is determined, from which the pH value of the blood in the target region by use of a relationship between pH value and one or more band parameters of pH sensitive vibrations of at least one molecule or part of a molecule present in blood, in particular heme vibrations of hemoglobin, is determined.
摘要:
The present application relates to a puncture system for inserting a cannula or a needle into a blood vessel of a person or an animal. The puncture system (100) has location determination means (108) for determining at least one location of the blood vessel. The location determination means are mechanically flexible such that their shape is adaptable to the shape of a body part of the person or animal. Furthermore, the system comprises processing means (112) for determining a puncture location (124) of the blood vessel depending on the output of the location determination means.
摘要:
An analysis apparatus, in particular a spectroscopic analysis apparatus, comprises an excitation system (exs) for emitting an excitation beam (exb) to excite a target region during an excitation period. A monitoring system (lso) is provided for emitting a monitoring beam (irb) to image the target region during a monitoring period. The monitoring period and the excitation period being substantially overlap, so that monitoring the target region is maintained during excitation. The analysis apparatus is provided with a tracking system (osc, dcu) to control the excitation system to direct the excitation beam onto the target region.
摘要:
The present invention relates to an apparatus, a method and a computer program for determining a lipid-water ratio and a scattering parameter of a sample. In particular, the invention relates to an apparatus comprising a light source and a detector arranged to measure an optical parameter at various wavelengths, where the wavelengths are selected so that at two of the wavelengths the absorption coefficients for both water and lipids are substantially identical. This enables determination of a scattering parameter. A further measurement at a third wavelength enables determination of a water-lipid ratio. According to a specific embodiment, the light source and the detector are arranged in relation to an interventional device, so as to be able to examine a tissue in terms of lipid-water ratio and scattering during an intervention.
摘要:
A spectroscopic apparatus for determining a concentration and/or spatial gradient of an analyte of a bodily fluid that provides determination of a position of a capillary vessel within a biological sample in order to focus spectroscopic excitation radiation to a volume that is in close proximity to the capillary vessel but does not overlap with the capillary vessel. The provided apparatus exploits the permeability of the vessel wall with respect to an analyte that is subject to analyte concentration determination. By means of biological transport processes, the concentration of an analyte of a bodily fluid located in the capillary vessel influences the concentration in the surrounding of the capillary vessel. Spectroscopic analysis of a volume outside the capillary vessel can therefore serve for a precise and reliable analyte concentration determination inside the capillary vessel.
摘要:
The invention relates to a method for quantitative measurement of glycated hemoglobin (HbAIc) in a blood sample containing hemoglobin molecules. In this method, the hemoglobin molecules are extracted from the blood sample, adsorbed onto a roughened metal surface and subjected to a Surface Enhanced Raman Scattering (SERS) measurement. The invention provides a universal method for the measurement of the HbAIc concentration in blood.
摘要:
The invention relates to an apparatus (20) for depth-resolved measurements of properties of tissue (114). The apparatus comprises illumination means (112) adapted to illuminate the tissue (114) with light, collector means (115) for collecting light which has not been absorbed by the tissue (114), determination means (108) for determining properties of the tissue (114) in different depths from the collected light, and a casing (121), in which at least a part of the illumination means and the collector means are located, for advancing into a hollow object. The illumination means (112) and the collector means (115) are adapted to collect light depth-resolved, and the determination means (108) is adapted to determine depth-resolved properties of the tissue (114) from the light, which has been collected depth-resolved.
摘要:
A system (10, 100, 300, 400) is provided for identifying certain targeted cells or tissues in a body. The system (10, 100, 300, 400) preferably includes at least one ingestible capsule that accommodates or supports (20) at least one of an illuminating module (30, 114, 322, 422, 452), a detecting module (40, 124, 324, 424, 434, 454), an imaging module (50, 326, 432, 456), a control module (60), or a reservoir (70, 132, 312, 412, 442) suitable for retaining and releasing one or more nanoshells. A method (200) is also provided for employing the system (10, 100, 300, 400) to detect, image or otherwise interact with diseased or abnormal cells and/or tissues in a body. The system (10, 100, 300, 400) and method (200) provided allow for improved diagnosing, treating and imaging techniques and for increased sensitivity and specificity in efficiently distinguishing targeted diseased or abnormal cells or tissue from surrounding healthy cells or tissue.