33 results about "Blood vessel visualization" patented technology

A method and apparatus for whole body bone removal and vasculature visualization in medical image data, such as computed tomography angiography (CTA) scans, is disclosed. Bone structures are segmented in the a 3D medical image, resulting in a bone mask of the 3D medical image. Vessel structures are segmented in the 3D medical image, resulting in a vessel mask of the 3D medical image. The bone mask and the vessel mask are refined by fusing information from the bone mask and the vessel mask. Bone voxels are removed from the 3D medical image using the refined bone mask, in order to generate a visualization of the vessel structures in the 3D medical image.

A method for visualizing a vascular structure includes obtaining an image dataset (step 20), selecting a vascular central axis (VCA) and a vector of interest (VOI) (step 21), forming a plurality of cross sections perpendicular to the vascular central axis, forming a convex hull to enclose each cross section (step 22), wherein the convex hull is oriented by the vector of interest and determined by the shape of the cross section, and connecting each convex hull to form a biconvex slab (step 23). The biconvex slab comprises two curved surfaces that enclose a 3D volume including the vascular structure 21 of interest. The volume within the biconvex slab can rendered to obtain a 3D view of the entire vascular structure (step 24). Since the biconvex slab is a 3D volume, volume rendering techniques can be used to render the 3D information and generate a resulting image of the vascular structure in a flattened plane having precise 3D spatial information.

An image data subtraction system enhances visualization of vessels subject to movement using an imaging system. The imaging system acquires data representing first and second anatomical image sets comprising multiple temporally sequential individual mask (without contrast agent) and fill images (with contrast agent) of vessels respectively, during multiple heart cycles. An image data processor automatically identifies temporally corresponding pairs of images comprising a mask image and a contrast enhanced image and for the corresponding pairs, automatically determines a shift of a contrast enhanced image relative to a mask image to compensate for motion induced image mis-alignment. The image data processor automatically shifts a contrast enhanced image relative to a mask image in response to the determined shift. The image data processor subtracts data representing a mask image of a corresponding pair from a shifted contrast enhanced image of the corresponding pair, to provide multiple subtracted images showing enhanced visualization of vessels.

The invention provides methods and systems for correcting translational distortion in a medical image of a lumen of a biological structure. The method facilitates vessel visualization in intravascular images (e.g. IVUS, OCT) used to evaluate the cardiovascular health of a patient. Using the methods and systems described herein it is simpler for a provider to evaluate vascular imaging data, which is typically distorted due to cardiac vessel-catheter motion while the image was acquired.

A method for visualizing branches of a lumen includes inserting (402) a fiber optic shape sensing device into a lumen and determining (404)changes in the lumen based upon strain induced in the fiber optic shape sensing device by flow in the lumen. Locations of branches are indicated (410) on a rendering of the lumen. An instrument is guided (414) to the locations of branches indicated on the rendering.

A blood vessel display device includes: a detection unit that scans body tissue with laser light for detection and detects reflected light from an irradiated part of the body tissue to which the laser light for detection has been irradiated; an image data generating unit that detects a surface shape of the irradiated part and the arrangement of blood vessels, which are present in a superficial layer of the irradiated part, on the basis of a detection result of the detection unit and generates image data of an image for visualizing the blood vessels displayed on the irradiated part; and a display unit that displays an image for visualizing the blood vessels on the irradiated part by scanning the irradiated part with laser light for display on the basis of the image data generated by the image data generating unit.

The invention discloses a three-dimensional blood vessel segmentation method based on a symmetric matching filter group and regional growth. Firstly, a basic matching filter template of a tubular structure with the satisfaction of a shape characteristic and a gray distribution characteristic of a three-dimensional blood vessel is designed, and two orthogonal planes are used to equally divide a basic matching filter into four quadrants. Then a matching filter group whose direction and scale can be changed is designed, the spatial convolution with a medical image to be enhanced is carried out, the obtainment of a maximum convolution response value is determined as a fusion rule, the blood vessel enhancement of a multi-scale and multi-direction matching filter group is realized, an enhanced image is obtained, and finally the regional growth is used to extract a three-dimensional blood vessel for the enhanced image. According to the method disclosed by the invention, a blood vessel visual effect can be effectively enhanced, the method has a good enhancement effect for a small branch peripheral blood vessel and a blood supply artery close to a lesion tumor especially, at the same time the to suppression of the limbic cortex and other impurities is obvious, thus the contrast of a vessel and a background significantly enhanced, and a solid base is laid for the extraction of a final vessel.

An image data subtraction system suitable for use in Angiography or other medical procedure enhances vessel visualization. The system comprises an imaging system for acquiring, during a medical procedure, data representing multiple temporally sequential individual images of vessels of a portion of patient anatomy. The sequential individual images encompass introduction of a contrast agent. An image processor automatically processes the data representing the multiple temporally sequential individual images to identify a first image indicating presence of the contrast agent and a second image preceding the first image by comparing a difference between measures representative of luminance content of the first and second image, with a threshold. The second image is substantially exclusive of an indication of presence of the contrast agent. The image processor, in response to the difference exceeding the threshold, automatically selects the second image as a mask image and subtracts data representing the mask image from data representing images of the temporally sequential individual images to remove background image detail and emphasize vessel structure in providing processed image data for display. A user interface presents the processed image data for display while the patient is undergoing the medical procedure.

A system provides a roadmap image displaying a vessel structure using an imaging system to acquire data representing multiple temporally sequential individual images of vessels of a region of interest of patient anatomy in the presence of a contrast agent. An image data processor generates multiple sequential cumulative images corresponding to the individual images and an individual current cumulative image corresponds to a current image of the individual images. The current cumulative image comprises cumulative pixel luminance values and an individual cumulative pixel luminance value is generated from luminance values of pixels, spatially corresponding to the individual cumulative pixel and present in images comprising a subset of the individual images. The subset comprises contiguous images of the temporally sequential individual images acquired preceding the current image and including the current image. An output processor provides the multiple sequential cumulative images to a destination.

A blood vessel display device includes: a detection unit that scans body tissue with laser light for detection and detects reflected light from an irradiated part of the body tissue to which the laser light for detection has been irradiated; an image data generating unit that detects a surface shape of the irradiated part and the arrangement of blood vessels, which are present in a superficial layer of the irradiated part, on the basis of a detection result of the detection unit and generates image data of an image for visualizing the blood vessels displayed on the irradiated part; and a display unit that displays an image for visualizing the blood vessels on the irradiated part by scanning the irradiated part with laser light for display on the basis of the image data generated by the image data generating unit.

Oily paclitaxel composition and formulation for chemoembolization and preparation method thereof solubilizing paclitaxel in an oily contrast medium. The composition of the present invention solubilizes paclitaxel and has an advantage of delivering anticancer drug to the target cells by chemoembolization since it is possible to visualize the blood vessel during the chemoembolization process. The present invention also relates to oily paclitaxel composition and formulation additionally comprising chemicals that prevent paclitaxel precipitation for prolonged preservation and the preparation method thereof. Since the composition of the present invention solubilize paclitaxel effectively and can be visualized during chemoembolization, it can be used for TACE to treat hepatoma and other solid tumors.

An image data subtraction system suitable for use in Angiography or other medical procedure enhances vessel visualization. An imaging system subtracts data representing a first mask image from data representing temporally sequential individual images of patient vessels to provide first digitally subtracted images. The sequential individual images encompass introduction of a contrast agent. An image processor automatically, processes the data representing the first digitally subtracted images to identify a first image indicating presence of the contrast agent and a second image preceding the first image by determining a measure representing a net presence of contrast agent in an individual digitally subtracted image. The second image is substantially exclusive of an indication of presence of the contrast agent. The image processor automatically, selects the second image as a second mask image and subtracts data representing the second mask image from the data representing images of the temporally sequential individual images to provide second digitally subtracted images. A user interface presents the second digitally subtracted images for display while the patient is undergoing a medical procedure.

The invention provides methods and systems for correcting translational distortion in a medical image of a lumen of a biological structure. The method facilitates vessel visualization in intravascular images (e.g. IVUS, OCT) used to evaluate the cardiovascular health of a patient. Using the methods and systems described herein it is simpler for a provider to evaluate vascular imaging data, which is typically distorted due to cardiac vessel-catheter motion while the image was acquired.

An image data subtraction system suitable for use in Angiography or other medical procedure enhances vessel visualization. The system comprises an imaging system for acquiring, during a medical procedure, data representing multiple temporally sequential individual images of vessels of a portion of patient anatomy. The sequential individual images encompass introduction of a contrast agent. An image processor automatically processes the data representing the multiple temporally sequential individual images to identify a first image indicating presence of the contrast agent and a second image preceding the first image by comparing a difference between measures representative of luminance content of the first and second image, with a threshold. The second image is substantially exclusive of an indication of presence of the contrast agent. The image processor, in response to the difference exceeding the threshold, automatically selects the second image as a mask image and subtracts data representing the mask image from data representing images of the temporally sequential individual images to remove background image detail and emphasize vessel structure in providing processed image data for display. A user interface presents the processed image data for display while the patient is undergoing the medical procedure.

Vasculature or parenchyma is imaged using upright MRI techniques, on patients who may have conditions such as congestive heart failure, or otherwise be healthy. When an individual is horizontal, venous drainage is minimized, causing the vessels to remain engorged, also referred to herein as vascular congestion. Vascular congestion results in an enlarging of the vessels and surrounding tissue causing the vessels to be more visible on MRIs. The decrease in vascular visibility in upright subjects is in part, due to an increase in venous drainage. Patients suffering from coronary and / or pulmonary deficiencies (e.g. CHF) experience decreased rates and degrees of venous drainage. In one embodiment, the present invention uses upright imaging to visualize these enlarged vessels.

An image data subtraction system enhances visualization of vessels subject to movement using an imaging system. The imaging system acquires data representing first and second anatomical image sets comprising multiple temporally sequential individual mask (without contrast agent) and fill images (with contrast agent) of vessels respectively, during multiple heart cycles. An image data processor automatically identifies temporally corresponding pairs of images comprising a mask image and a contrast enhanced image and for the corresponding pairs, automatically determines a shift of a contrast enhanced image relative to a mask image to compensate for motion induced image mis-alignment. The image data processor automatically shifts a contrast enhanced image relative to a mask image in response to the determined shift. The image data processor subtracts data representing a mask image of a corresponding pair from a shifted contrast enhanced image of the corresponding pair, to provide multiple subtracted images showing enhanced visualization of vessels.

A method and apparatus for whole body bone removal and vasculature visualization in medical image data, such as computed tomography angiography (CTA) scans, is disclosed. Bone structures are segmented in the a 3D medical image, resulting in a bone mask of the 3D medical image. Vessel structures are segmented in the 3D medical image, resulting in a vessel mask of the 3D medical image. The bone mask and the vessel mask are refined by fusing information from the bone mask and the vessel mask. Bone voxels are removed from the 3D medical image using the refined bone mask, in order to generate a visualization of the vessel structures in the 3D medical image.

The invention relates to the technical field of thin optical lens assemblies in medical instruments, in particular to a high-contrast high-acutance medical miniature near-infrared blood vessel visualization lens, which comprises four optical lenses, a diaphragm and an infrared filter, wherein the four optical lenses are divided into three groups; the first group comprises two lenses and consists of a positive lens and a negative lens which are the first and second slices; the face type of the positive lens is convex on the front and convex on the back; the face type of the negative lens is convex on the front and concave on the back; the diaphragm is arranged between the positive lens and the negative lens; the second group is a positive lens which is concave on the front and convex on the back and is the third slice; the third group is a negative lens and is the fourth slice, the first face of the negative lens is a convex face, and the second face of the negative lens is a concave face; the four lenses are all aspherical; the infrared filter is arranged on one side of the third group of negative lens. On the premise of miniaturization, the contrast and the acutance of the lens can be improved to the maximum, edge parameters are limited, and the stability for processing and forming the lens is greatly improved.

The invention provides a hepatic vessel three-dimensional reconstruction and visualization method based on a vascular tubular model. The method comprises the steps of S10, obtaining a liver CT image,and adjusting the window width and window position, so as to enable the liver CT image to accord with the gray scale display range of display equipment; s20, performing preprocessing of denoising andimage enhancement on the liver CT image conforming to the gray level display range of the display device; s30, segmenting the blood vessel by using a segmentation method based on a Hessian matrix anda region growing algorithm according to the preprocessed blood vessel image; s40, filling a cavity caused by blood vessel segmentation by adopting a morphological method; s50, volume rendering is performed on the blood vessel by using a triangular mesh surface rendering and light projection algorithm according to inherent characteristics of the liver blood vessel so as to realize three-dimensionalreconstruction; and S60, visually displaying the three-phase image sequence by adopting a computer-aided liver blood vessel visualization system based on a CT dynamic enhanced image. According to themethod, segmentation and three-dimensional reconstruction are accurately and reliably carried out on the liver blood vessel, and visual display can be well carried out to assist a doctor in determining the liver condition.

A catheter device for providing visualization as well as support and / or stability for blood vessels during procedures for inserting electrical leads. The catheter device comprises a longitudinal member having a distal end and a proximal end, an expandable element near the distal end of the longitudinal member for providing support to the blood vessel, and a contrast release port near the distal end of the longitudinal member for releasing a contrast medium into the blood vessel to visualize the blood vessel.The expandable element may comprise an inflatable balloon, or a plurality of compressible elements that expand to a balloon like shape, or a compressible coil housed in a protective sheath that retracts to allow the coil to expand. The catheter device comprises two inflatable balloons. At its proximal end, the catheter device comprises one or more inflation ports for inflating the one or more balloons.To allow for visualization using a contrast agent, the catheter device further comprises a contrast injection port near its proximal end, and a contrast release port near its distal end.

A system provides a roadmap image displaying a vessel structure using an imaging system to acquire data representing multiple temporally sequential individual images of vessels of a region of interest of patient anatomy in the presence of a contrast agent. An image data processor generates multiple sequential cumulative images corresponding to the individual images and an individual current cumulative image corresponds to a current image of the individual images. The current cumulative image comprises cumulative pixel luminance values and an individual cumulative pixel luminance value is generated from luminance values of pixels, spatially corresponding to the individual cumulative pixel and present in images comprising a subset of the individual images. The subset comprises contiguous images of the temporally sequential individual images acquired preceding the current image and including the current image. An output processor provides the multiple sequential cumulative images to a destination.

The invention relates to an ultrasonic-guided visualized positioning device for an animal in-vivo blood vessel. The ultrasonic-guided visualized positioning device comprises an ultrasonic diagnostic apparatus, an ultrasonic probe, a puncture guide frame, a laser positioning device and a puncture needle, wherein the ultrasonic probe is electrically connected with the ultrasonic diagnostic apparatus, and the puncture guide frame is mounted at a working end close to the ultrasonic probe; the laser positioning device comprises a supporting frame, the top end of the supporting frame is sequentiallyconnected with a laser, a first locating ring and a second locating ring from left to right, horizontal-penetrative collimating locating holes are separately formed in dead centers of the first and second locating rings, and a laser position line emitted from the laser penetrates through the collimating locating holes and a shot hole; the puncture needle is mounted at the bottom end of the supporting frame, the front end, close to a spine, of the puncture needle is mounted in a locating groove of the puncture guide frame, and the laser position line is parallel to the axis of the puncture needle. According to the device, an angle of incidence of a shot can be accurately determined, and the accurate positioning of a wound to an experimental animal caused by the shot is ensured.

The invention relates to an auxiliary operating device by means of a non-contact blood vessel visualization device. The auxiliary operating device at least comprises a blood sampling support pad, theblood vessel visualization device and a central processing module; the blood sampling support pad is used for supporting and fixing an arm of a blood sampling object; the blood vessel visualization equipment is assembled above the blood sampling support pad and is used for cooperating with the blood sampling support pad to provide hemodynamic monitoring for projecting a subsurface structure onto the surface of the object; the central processing module is configured to perform information interaction with a hospital medical system so as to assist medical treatment by controlling the blood sampling support pad and the blood vessel visualization equipment to be mutually matched for use under the condition of determining medical information of a next blood sampling object at least based on blood sampling image analysis of the blood sampling support pad on image information acquired by the blood vessel visualization equipment personnel protecting device for completing blood sampling operation.

The invention belongs to the field of animal experimental models, and relates to application of ultrasonic detection equipment in semiquantitatively determining a sheep fatty liver. The application comprises the steps that a sheep fatty liver model is built by simulating negative balance of energy in the natural state; by means of characteristic analysis on liver ultrasonic images and corresponding data analysis on liver triglyceride content, a sheep fatty liver ultrasonic diagnosis method for semiquantitatively diagnosing that the liver triglyceride content is smaller than 4%, between 4% and 10% and larger than 10% is determined according to the liver echo brightness enhancing degree, the liver and kidney echo ratio increasing degree, the hepatic vessel visualization weakening degree and the acoustic shadow visualization fuzzy degree of hepatic portal veins, postcaval veins, rumen walls, intestines and diaphragms at the far field of the liver. The method is high in sensitivity, high in specificity and good in repeatability and has an ideal application prospect.

A system for visualizing an anatomical target includes a scope (102) for internal imaging having a field of view less than a region to be imaged. A planning module (104) is configured to receive video from the scope such that field of view images of the scope are stitched together to generate a composite image of the region to be imaged. An image guidance module (016) is configured to move the scope along the anatomical target during a procedure such that an image generated in the field of view of the scope is displayed as live video overlaid on a field of the composite image.

In order to visualize a narrow blood vessel overlapping a thick blood vessel, at the time of performing a maximum intensity projection on three-dimensional image data, three-dimensional image data is weighted with a plurality of weighting functions of different attenuation characteristics along a projection line. Maximum intensity projections are performed on the plurality of pieces of the weighted three-dimensional image data, and results of all of the maximum intensity projections are summed. The weight of the weighting function is zero until the projection line reaches the surface of an image and, after the reach, gradually decreases from an initial value. Alternatively, the weight of the weighting function is zero to some midpoint of the projection line and, after the midpoint, gradually decreases from the initial value. The midpoint is adjustable. The attenuation characteristic is given by an exponential function. Parameters of the exponential function are adjustable.

The invention discloses a three-dimensional blood vessel segmentation method based on a symmetric matching filter group and regional growth. Firstly, a basic matching filter template of a tubular structure with the satisfaction of a shape characteristic and a gray distribution characteristic of a three-dimensional blood vessel is designed, and two orthogonal planes are used to equally divide a basic matching filter into four quadrants. Then a matching filter group whose direction and scale can be changed is designed, the spatial convolution with a medical image to be enhanced is carried out, the obtainment of a maximum convolution response value is determined as a fusion rule, the blood vessel enhancement of a multi-scale and multi-direction matching filter group is realized, an enhanced image is obtained, and finally the regional growth is used to extract a three-dimensional blood vessel for the enhanced image. According to the method disclosed by the invention, a blood vessel visual effect can be effectively enhanced, the method has a good enhancement effect for a small branch peripheral blood vessel and a blood supply artery close to a lesion tumor especially, at the same time the to suppression of the limbic cortex and other impurities is obvious, thus the contrast of a vessel and a background significantly enhanced, and a solid base is laid for the extraction of a final vessel.

The invention provides periocular combined anti-aging surgery capable of avoiding blood vessels without causing a bruise. The periocular combined anti-aging surgery adopts an optical blood vessel imaging instrument, deep blood vessel distribution of 0-6 mm can be clearly displayed through deep intelligent recognition, the blood vessels are accurately avoided through a blood vessel visualization operation in an operaton process of cosmetic surgery, and no bruises are caused after the surgery. Meanwhile, the surgery comprises a nutrient activating step acting on the periocular epidermis to the superficial layer of the dermis, a pit filling step acting on the periocular dermis and the deep layer of the dermis, a linear lifting step acting on the periocular fascia layer and a protein wrinkle removing step acting on the periocular muscle layer, and the effect of superposition treatment is achieved through the multi-step periocular combined surgery.

A system for visualizing target anatomy comprising: a speculum (102) for internal imaging having a field of view smaller than a region to be imaged; a planning module (104) configured to a scope receiving video such that the field of view images of the scope are stitched together to generate a composite image of the region to be imaged; an image guidance module (016) configured to follow the target during the procedure The anatomy moves the scope such that images generated in the field of view of the scope are displayed as live video superimposed on the field of view of the composite image.