摘要:
A system and method is disclosed for measurement of pulse wave velocity of a vessel. An intravascular device comprises a first and a second marker provided at different locations along the length of the intravascular device of which positions are localizable by a tracking apparatus. The intravascular device provides plurality of measurements along the length of the vessel, while the intravascular device is moved from a first position to a second position, corresponding to a first and a second time. At the second time the position of the first marker in the vessel corresponds to the position of the second marker at the first time. The pulse wave velocity value of the vessel is ascertained based on measurements associated for the first time and the second time from the plurality of measurements and based on the distance between the locations of the two markers along the length of the intravascular device.
摘要:
The present invention relates to a device for determining information relating to a suspected occluding structure. It is described to provide (210) a spectral resolving unit with at least one broadband radiation. The at least one broadband radiation comprises a first broadband radiation acquired from a region of interest within a vascular structure. An occluding structure is suspected to be located within the region of interest and wherein the first broadband radiation is associated with the suspected occluding structure. At least one spectrally resolved data set is determined (220) on the basis of the at least one broadband radiation, wherein the at least one spectrally resolved data set comprises a first spectrally resolved data set determined on the basis of the first broadband radiation. A processing unit is provided (230) with the at least one spectrally resolved data set on the basis of the at least one broadband radiation. The processing unit determines (240) information relating to the suspected occluding structure, comprising utilisation of the first spectrally resolved data set.
摘要:
A medical imaging system for identifying a target structure (TS), e.g. a tumor, in a biological tissue. A hyperspectral camera system is used for imaging a surface area (A1) of the tissue (BT), e.g. with a limited spectral resolution, but enough to allow identification of suspicious areas where the target structure (TS) may be, e.g. such areas can be visually indicated on a display to the operator. A probe (PR), e.g. an optical surface probe, is used to provide probe measurement of a smaller surface area (A2) of the tissue, but with more information indicative of the target structure. The probe is selected to provide a higher specificity with respect to identification of the target structure than the hyperspectral camera (HSC). The hyperspectral processing algorithm (PP) is then calibrated based on probe measurement data performed within the suspicious areas, thus providing a calibrated hyperspectral processing algorithm resulting in images with an enhanced sensitivity to identify the target structure. Only few probe measurements are required to significantly improve the resulting image, thereby providing a reliable and fast target structure (TS) identification.
摘要:
The present invention relates to determining a treatment response index. In order to improve and facilitate hypertension treatment procedures, a device (10) for determining a treatment response index is provided that comprises a data input (12), a data processor (14) and a data output (16). The data input is configured to receive a value (18) of at least one first measurement of a physiological parameter of a subjects vasculature under a first condition; and to provide a value (20) of at least one second measurement of the physiological parameter of the vasculature under a second condition. In the second condition, a pre-determined stimulation is provided, and the first condition is non-stimulated or at least differently stimulated. The data processor is configured to generate a treatment response index. In an example, the data output is configured to provide a classification of the subject into one of at least two groups of subjects, based on the treatment response index.
摘要:
The invention relates to a detection apparatus (30) for determining a state of tissue. The detection apparatus (30) comprises a fluorescence spectrum providing unit (2, 3) for providing a fluorescence spectrum of the tissue, a differentiation unit (4) for generating a derivative of the fluorescence spectrum, and a tissue state determination unit (5) for determining the state of the tissue from the derivative. This allows determining the state of the tissue, even if characteristics, which are related to the state of the tissue, are only hardly visible or not visible at all in the fluorescence spectrum. The reliability of determining the state of the tissue, for instance, whether the tissue is cancerous or not, can therefore be improved.
摘要:
A monitoring system comprises an intra-vascular support device and a sensor mounted to the support device and projecting into the vessel. The sensor generates a signal which is dependent on the level of deformation of a free end. The sensor signal is interpreted to enable detection of changes in the length of a deformable part of the sensor thereby to determine a level of bio-layer formation and also determine a level of flow. The sensor remains able to detect flow even when a bio-layer is formed and it can also detect the presence (and thickness) of the bio-layer, because part of the sensor becomes rigid when constrained by the bio-layer.
摘要:
The present invention relates to a system (10) for guiding an instrument (12, 100, 100A, 100B, 112) in a body (14). The system (10) records an image where the instrument (12, 100, 100A,100B, 112) is identifiable and the instrument (12, 100, 100A, 100B, 112) records signals indicative of the type of tissue at the instrument (12, 100, 100A, 100B, 112). The system (10) determines the tissue type based on a signal from the instrument (12, 100, 100A, 100B, 112). The system (10) displays an image being a combined image of the body (14) and instrument (12, 100, 100A, 100B, 112) and an indication of tissue type at a position where the tissue type was determined. The present invention further relates to a method of displaying an image comprising tissue-type and instrument position in a body. The present invention further relates to an instrument and a software implemented method for being executed on a digital processor.
摘要:
A medical imaging system for identifying a target structure (TS), e.g. a tumor, in a biological tissue. A hyperspectral camera system is used for imaging a surface area (A1) of the tissue (BT), e.g. with a limited spectral resolution, but enough to allow identification of suspicious areas where the target structure (TS) may be, e.g. such areas can be visually indicated on a display to the operator. A probe (PR), e.g. an optical surface probe, is used to provide probe measurement of a smaller surface area (A2) of the tissue, but with more information indicative of the target structure. The probe is selected to provide a higher specificity with respect to identification of the target structure than the hyperspectral camera (HSC). The hyperspectral processing algorithm (PP) is then calibrated based on probe measurement data performed within the suspicious areas, thus providing a calibrated hyperspectral processing algorithm resulting in images with an enhanced sensitivity to identify the target structure. Only few probe measurements are required to significantly improve the resulting image, thereby providing a reliable and fast target structure (TS) identification.
摘要:
The present invention relates to a system (10) for guiding an instrument (12, 100, 100A, 100B, 112) in a body (14). The system (10) records an image where the instrument (12, 100, 100A,100B, 112) is identifiable and the instrument (12, 100, 100A, 100B, 112) records signals indicative of the type of tissue at the instrument (12, 100, 100A, 100B, 112). The system (10) determines the tissue type based on a signal from the instrument (12, 100, 100A, 100B, 112). The system (10) displays an image being a combined image of the body (14) and instrument (12, 100, 100A, 100B, 112) and an indication of tissue type at a position where the tissue type was determined. The present invention further relates to a method of displaying an image comprising tissue-type and instrument position in a body. The present invention further relates to an instrument and a software implemented method for being executed on a digital processor.
摘要:
A catheter (12) has an image sensing system (S1-S5) for imaging the interior wall of a passageway in which the catheter is to be located. The catheter has a radial imaging system comprising a light source arrangement for generating a light output radially around the catheter and an image sensor for receiving the generally radial light after the light has been scattered back by the interior wall. The catheter is positioned within the passageway with a known position and orientation, for example a known angle with respect to the anterior-posterior plane along the length of the catheter, so that it is known where along the catheter length, and at which angular position around the catheter, it is close to the passageway wall. The light output has a different intensity at different radial directions and/or the catheter comprises a light transmission arrangement which gives rise to different transmission of the light output at different radial directions. These provide alternative measures to reduce the light received by the image sensor, thereby to prevent blooming in the captured image.