摘要:
A method and apparatus for assessing bone tissue comprises the steps of and means for: exposing a sample to nonionizing radiation; detecting nonionizing radiation after transit in the bone tissue; measuring optical properties from the detected nonionizing radiation to characterize bone tissue across an entire selected spectral range using a continuous wave model, a frequency domain model or a combination of both wave model and frequency domain models; and determining composition, structure, physiology or a combination thereof of bone tissue from the measured optical properties.
摘要:
A method for noninvasively determining deep tissue temperature comprises measuring data relating to spectral shifts of chromophore absorption in tissue using broadband diffuse optical spectroscopy and generating a temperature reading corresponding to the spectral shift of an absorption peak of the chromophore. A bound water correction is made to the spectral shift. A frequency domain measurement at multiple wavelengths is made to determine the absolute absorption and scattering values between 600 and 1050 nm. The measurement of an absolute absorption comprises measuring an absolute absorption coefficient of selected tissue and further comprising deducing concentrations of tissue composition including lipids, deducing information related to heterogeneity and integrity of tissue matrix, and deducing temperature heterogeneity related to vulnerable plaque in vascular tissue. The measurement comprises making a measurement in the range of 600-1100 nm to interrogate a vessel wall in the presence of blood.
摘要:
A diffuse optical spectroscopy system comprises a laser breast scanner, a handheld probe connected to the laser breast scanner for scanning a breast, and a tracking device coupled to the handheld probe, wherein the tracking device determines locations of the handheld probe relative to the breast. The tracking device comprises a magnetic tracking device, an optical tracking device or a laser tracking device.
摘要:
A diffuse optical spectroscopy system comprises a laser breast scanner, a handheld probe connected to the laser breast scanner for scanning a breast, and a tracking device coupled to the handheld probe, wherein the tracking device determines locations of the handheld probe relative to the breast. The tracking device comprises a magnetic tracking device, an optical tracking device or a laser tracking device.
摘要:
A device and method utilizes a broadband diffuse optical spectroscopy (DOS) system to dynamically calculate the concentrations of multiple chromophores in vivo using a non-invasive probe. The device and method permit dynamic monitoring of multiple in vivo tissue chromophores non-invasively with sensitivities necessary for effective therapeutic monitoring. The device includes a probe containing first and second source optical fibers as well as first and second detector optical fibers. The probe is placed adjacent to a sample of interest and detects reflected light which is passed to a proximally located detector and spectrometer. The concentrations of multiple chromophores are determined in real time. In a preferred embodiment, the multiple tissue chromophores include at least two of methemoglobin (MetHb), deoxyhemoglobin (Hb-R), oxyhemoglobin (Hb-O2), water (H2O), and methylene blue (MB). The device and method can be used quantify and monitor methemoglobin formation in subjects suffering from methemoglobinemia.
摘要:
The illustrated embodiment is an improvement in a method of optically analyzing tissue in vivo in an individual to obtain a unique spectrum for the tissue of the individual, the improvement including the steps of optically measuring the tissue of the individual to obtain a spectrum of an optical parameter, and identifying a spectral signature specific to a metabolic or physiologic state in the tissue of the individual with a unique spectrum for the tissue by considering only the spectral differences between a first metabolic or physiologic state of the tissue of the individual and one or more other metabolic or physiologic states of the tissue of the individual such that identification of the spectral signature is self-referencing with respect to intra-individual metabolic or physiologic variations. The method also includes separating benign and malignant lesions only using the shape or a characteristic of the spectrum.