140 results about "Vascular imaging" patented technology

In order to provide an individual identification device for enabling good blood-vessel imaging even in a noncontact way and using an identifying method suitable for noncontact imaging, the device comprises an imaging device for imaging blood vessels of a hand of the user in a noncontact way including a position/direction/shape instructing unit for instructing the user to hold up his hand, one or more irradiating units for irradiating the hand with near infrared radiation, and one or more imaging units for producing an image by near infrared radiation; a blood-vessel image extracting unit for extracting the blood-vessel image from the produced image; a blood-vessel image storage unit for storing the hand blood-vessel image of each user; and an identifying unit for identifying the user by comparing the extracted blood-vessel image with the registered blood-vessel image.

The invention provides methods and systems for imaging vessels in a subject. In certain embodiments the vessels may be associated with a solid organ transplant.

Embodiments of the present invention include a laser catheter that includes a catheter body, a light guide, and a distal tip that extends beyond the exit aperture of the light guide. In some embodiments, an imaging device is disposed on the distal tip such that the imaging device is distal relative to the exit aperture of the light guide. In some embodiments, the imaging device can be gated to record images during and/or slightly beyond periods when the laser catheter is not activated.

The present invention is a guide wire imaging device for vascular or non-vascular imaging utilizing optic acoustical methods, which device has a profile of less than 1 mm in diameter. The ultrasound imaging device of the invention comprises a single mode optical fiber with at least one Bragg grating, and a piezoelectric or piezo-ceramic jacket, which device may achieve omnidirectional (360°) imaging. The imaging guide wire of the invention can function as a guide wire for vascular interventions, can enable real time imaging during balloon inflation, and stent deployment, thus will provide clinical information that is not available when catheter-based imaging systems are used. The device of the invention may enable shortened total procedure times, including the fluoroscopy time, will also reduce radiation exposure to the patient and to the operator.

A procedure and apparatus are provided which allow rapid positional change in the patient centering in order to facilitate the imaging of blood vessels in a series of different views. This procedure and apparatus can also facilitate the imaging of other tissues of the body at different spatial locations as well. The procedure and apparatus reduce the time required for obtaining the necessary images for a medical imaging examination using a single injection of an MRI or iodinated contrast agent.

The present invention relates to a device, system and a method for blood vessel imaging, detection, and marking and in particular, to such a device, system and method in which an optical enhancers are utilized to increase the accuracy and quality of the process for detecting a blood vessel.

A compound comprises a donor and an acceptor, wherein at least one donor ( "D" ) and at least one acceptor ( "A" ) may be arranged in an order of D-A; D-A-D; A-D-A; D-D-A-D-D; A-A-D-A-A; D-A-D-A-D; and A-D-A-D-A. The compound may be selected from the group consisting of: MTPE-TP, MTPE-TT, TPE-TPA-TT, PTZ-BT-TPA, NPB-TQ, TPE-TQ-A, MTPE-BTSe, DCDPP-2TPA, DCDPP-2TPA4M, DCDP-2TPA, DCDP-2TPA4M, TTS, ROpen-DTE-TPECM, and RClosed-DTE-TPECM. The compound may be used as a probe and may be functionalized with special targeted groups to image biological species. As non-limiting examples, the compound maybe used in cellular cytoplasms or tissue imaging, blood vessel imaging, in vivo fluorescence imaging, brain vascular imaging, sentinel lymph node mapping, and tumor imaging, and the compound may be used as a photoacoustic agent.

The invention belongs to the technical field of surgical navigation, and particularly relates to an extension ultrasound vascular imaging device and method based on a catheter path. The extension ultrasound vascular imaging device comprises a three-dimensional ultrasound instrument, a set of electromagnetic positioning equipment, an interventional catheter and a computer, wherein the three-dimensional ultrasound instrument scans a vessel through an ultrasound probe to obtain a three-dimensional image. The electromagnetic positioning equipment comprises a magnetic field generator and two positioning sensors with six degrees of freedom, wherein the magnetic field generator defines a space coordinate system, one positioning sensor with six degrees of freedom is installed on the ultrasound probe to obtain the space coordinate of the ultrasound image, and the other positioning sensor with six degrees of freedom is embedded in an inflexible portion at the front end of the catheter to obtain the space coordinate of the front end of the catheter. The three-dimensional ultrasound instrument and the electromagnetic positioning equipment are both connected with the computer, and the obtained three-dimensional ultrasound image and the obtained catheter path are rebuilt in the same coordinate system through the computer. The extension ultrasound vascular imaging device can position branches of the vessel after the vessel of an area deforms, wherein ultrasound imaging cannot be conducted on the area.

DIR imaging of blood vessels by administering a series of DIR preparation pulse modules at a repetition interval short enough that at least two DIR preparation pulse modules generally occur within each RR interval, and by acquiring image data for a plurality of slices following each DIR module.

The present invention relates to real-time monitoring of photodynamic tumor treating effect, and the photoacoustic blood vessel imaging method is that during laser irradiation of tumor tissue for photodynamic treatment, the photoacoustic chromatographic images of the tumor tissue before and after photodynamic action are compared and the blood vessel diameter change is reflected with the positive and negative peak-to-peak width of the photoacoustic blood vessel signals. The equipment for the real-time monitoring of photodynamic tumor treating effect includes laser generator assembly, acoustic signal acquiring assembly and computer successively connected electrically, as well as rotating scan mechanism connected electrically to the computer, sample fixing assembly and connected acoustic assembly. The present invention is sensitive and quick in real-time monitoring of photodynamic tumor treating effect.

Cone Beam Breast CT (CBBCT) is a three-dimensional breast imaging modality with high soft tissue contrast, high spatial resolution and no tissue overlap. CBBCT-based computer aided diagnosis (CBBCT-CAD) technology is a clinically useful tool for breast cancer detection and diagnosis that will help radiologists to make more efficient and accurate decisions. The CBBCT-CAD is able to: 1) use 3D algorithms for image artifact correction, mass and calcification detection and characterization, duct imaging and segmentation, vessel imaging and segmentation, and breast density measurement, 2) present composite information of the breast including mass and calcifications, duct structure, vascular structure and breast density to the radiologists to aid them in determining the probability of malignancy of a breast lesion.

Embodiments of the invention disclose a vascular imaging method and device. The method includes: scanning an area of blood vessels to be detected to obtain a plain scan image and an enhanced image, and subtracting the enhanced image according to a skeletal area in the plain scan image to obtain a subtracted image; detecting a vascular area of the blood vessels to be detected, in the enhanced image; fusing the vascular area of the blood vessels to be detected, in the subtracted image to obtain an image of the blood vessels to be detected. Therefore, by the use of the vascular imaging method and device, the blood vessels passing skeleton can be retained in the subtracted image.

The invention discloses an angiography method. The angiography method comprises the following steps: 1, obtaining a reinforced image and a plain scanned image, and limiting a sub graph of the reinforced image and a sub graph of the plain scanned image; 2, obtaining a bone reticle mask of the sub graph of the plain scanned image; 3, conducting registering on the sub graph of the reinforced image and the sub graph of the plain scanned image,, so that the spatial alternation relation between the corresponding sub graphs of the plain scanned image and the reinforced image is obtained, and positioning bone tissues on the sub graph of the reinforced image, so that a bone reticle mask of the sub graph of the plan scanned image; 4, combining the bone reticle mask of the sub graph of the reinforced image and the sub graph of the reinforced image, so that a blood vessel image is obtained. Through the arrangement, the blood vessel imaging effect and efficiency can be greatly improved, and the method facilitates disease diagnosis and treatment.

The invention relates to an angiography method applied to optical coherence tomography and an OCT system. Based on the frequency division thought, OCT interference fringes are decomposed into multiple wave number bands, and noise generated when shot tissue moves is lowered. After intensity images obtained after frequency division are acquired, an improved CM method is further adopted, the change degree of the intensity, calculated through the Pearson correlation coefficient, between adjacent continuously scanned cross-sectional images is calculated, and signals of blood vessels are enhanced. In combination with information of points adjacent to detection points, sensitivity to blood vessel detection is improved, sensitivity to eye movement is reduced, and the method is suitable for angiography of biological tissue with high scattering. The method can be used for angiography of anterior segment sclera or irises or other tissue in ophthalmology and can be applied to microvascular imaging of other portions of the human body.

The invention discloses a tumor microvascular imaging instrument and a tumor microvascular imaging method. The tumor microvascular imaging instrument comprises an infrared confocal imaging part and a control part, wherein the infrared confocal imaging part comprises a near-infrared laser, a dichroscope, a two-dimensional scanning galvanometer, a scanning lens system, an imaging objective, a near-infrared fluorescence filter, a convergent lens, a pinhole and a detector; the scanning lens system is composed of a field lens and a cylindrical lens; the control part comprises a two-dimensional scanning control module which is used for controlling the two-dimensional scanning galvanometer, a signal amplification and acquisition module and a data processing and image displaying module; near-infrared quantum dots that a fluorescence excitation spectrum ranges from 1000nm to 1350nm and a fluorescence emission spectrum ranges from 1350nm to 1500nm are injected to blood vessels of a to-be-observed living body; and then a tumor part of the living body is observed under the tumor microvascular imaging instrument. According to the tumor microvascular imaging instrument and the tumor microvascular imaging method provided by the invention, complete three-dimensional imaging of tumor microvessels of the living body can be implemented with a high resolution.

An open peripheral vascular coil and method of providing peripheral vascular imaging are provided. The peripheral vascular coil includes a base coil section having a plurality of coil elements and a plurality of coil sections configured for removable attachment to the base coil section. Each of the plurality of coil sections includes a plurality of coil elements.

Systems and methods are provided for non-invasive detection of blood vessels. The systems and methods cool uniformly a tissue volume below a skin region for a specified cooling period and then image vessel thermal footprints of vessels below the skin as they heat up the skin region. The systems comprise a thermal imaging device configured to image the skin region after the cooling period, an image processor arranged to identify, in images captured by the thermal imaging device, which arise on the skin region after discontinuation of the cooling, and displaying means configured to present the identified vessel thermal footprints. The system and methods may analyze the spatio-temporal patterns of the natural heating of the skin surface to derive data on the location of the vessels under the skin. Three dimensional (3D) imaging optics and techniques may further enhance the vessel imaging.

The invention discloses intelligent visual vascular imaging spectacles equipment which comprises a pair of spectacles, a camera shooting module, a multi-light-source module, a micro-display module and a digital processing module. The pair of spectacles comprises a spectacles frame and lenses. The spectacles frame is internally provided with the camera shooting module and the multi-light-source module. The multi-light-source module is used for lighting the body surface. The camera shooting module is used for shooting images lightened by the multi-light-source module. The shot images are transmitted to the micro-display module after being enhanced by the digital processing module to be observed by medical staff. The micro-display module is provided with a miniature LCD display module. The camera shooting module and the micro-display module are driven by the digital processing module. The intelligent visual vascular imaging spectacles equipment, serving as a wearable device, has the advantage of being convenient to carry. Meanwhile, the micro-display module based on total internal reflection is designed, the optical path is increased through total internal reflection, and the field of view of the micro-display module is increased.

A method for producing an image of a blood vessel in a patient utilizing temperature sensitive MRI measurement. The method includes introducing a fluid in a blood vessel, obtaining magnetic resonance information from the blood vessel, and determining a magnetic resonance parameter using the magnetic resonance information. The method further includes using the magnetic resonance parameter to determine a temperature differential in the blood vessel and producing an image of the blood vessel based on the temperature differential. Systems for producing an image of a blood vessel in a patient using temperature sensitive MRI measurements are also provided.

The invention provides an apparatus (10) and method (24) for determining vascular characteristics for early detection of cardiovascular disease comprising: an ultrasonic signal source (32) directing ultrasound signals (30) at an artery (27); an ultrasonic signal receiver (34) receiving ultrasound signals (36) reflected from or transmitted through the artery (27); means for analysing signals (40) received by ultrasonic signal receiver (34) to extract arterial displacement data (42); means for acquiring blood pressure data (48); signal processing means (44) for adjusting said arterial displacement data (46) using the blood pressure data (48); and means for analysing the adjusted arterial displacement data (51) to characterise vascular function (28).