31 results about "Small Lesion" patented technology

This invention describes a method for increasing the speed of the parabolic marching method by about a factor of 256. This increase in speed can be used to accomplish a number of important objectives. Firstly, the speed can be used to collect data to form true 3-D images or 3-D assembled from 2-D slices. Speed allows larger images to be made. Secondly, the frequency of operation can be increased to 5 MHz to match the operating frequency of reflection tomography. This allow the improved imaging of speed of sound which in turn is used to correct errors in focusing delays in reflection tomography imaging. This allows reflection tomography to reach or closely approach its theoretical spatial resolution of ½ to ¾ wave lengths. A third benefit of increasing the operating frequency of inverse scattering to 5 MHz is the improved out of topographic plane spatial resolution. This improves the ability to detect small lesions. It also allow the use of small transducers and narrower beams so that slices can be made closer to the chest wall.

Reference imagery of dermatological conditions is compiled in a crowd-sourced database (contributed by clinicians and / or the lay public), together with associated diagnosis information. A user later submits a query image to the system (e.g., captured with a smartphone). Image-based derivatives for the query image are determined (e.g., color histograms, FFT-based metrics, etc.), and are compared against similar derivatives computed from the reference imagery. This comparison identifies diseases that are not consistent with the query image, and such information is reported to the user. Depending on the size of the database, and the specificity of the data, 90% or more of candidate conditions may be effectively ruled-out, possibly sparing the user from expensive and painful biopsy procedures, and granting some peace of mind (e.g., knowledge that an emerging pattern of small lesions on a forearm is probably not caused by shingles, bedbugs, malaria or AIDS). A great number of other features and arrangements are also detailed.

The invention discloses a balloon catheter, which comprises: a hypotube having an expansion chamber; an inner tube having an expansion chamber, and an outer tube having an outer diameter, wherein theinner tube is located inside the outer tube, the inner tube and the outer tube are coaxially arranged on the longitudinal axis, and a distal end of the hypotube is located between a proximal end of the outer tube and a proximal end of the inner tube; a balloon having only a tapered portion, wherein the proximal end of the balloon is coupled to the distal end of the outer tube, the distal end of the inner tube is positioned within the balloon and coupled to the distal end of the balloon; and a plurality of guide wires located between the inner tube and outer tube, wherein the proximal end of each guide wire is fixed to the distal end of the hypotube. The balloon catheter of the present invention can ensure the flexibility of the guide wire at the distal end while ensuring the pushing performance and anti-bendability of the guide wire at the distal end, and can smoothly pass the balloon catheter through the small lesion to improve the penetration performance of the balloon catheter.

The embodiment of the invention provides a video-assisted thoracoscope locating and marking method, which comprises the following steps of: obtaining locating information which includes the locating information of lesion; determining a preoperative locating mode according to the locating information; locating the lesion according to the preoperative locating mode, and obtaining the locating information of the lesion; carrying out a real-time calibration by combining with ultrasonic technique during the operation to obtain marking information; and resecting the lesion according to the locatinginformation and marking information of the lesion. By the adoption of the video-assisted thoracoscope locating and marking method, different preoperative locating methods are provided, meanwhile, theultrasonic three-dimensional real-time calibration technique is adopted during the operation to obtain the locating information of the lesion and the marking information related to the lesion, so thatthe lesion is accurately located and a definite surgical excision edge is provided at the same time, thereby avoiding unnecessary excision of the lesion, and overcoming the problem that an existing locating and marking method cannot accurately locate and mark small lesions, which leads to large excision range.

An improved method for enhancing the contrast between background and lesion areas of a breast undergoing dual-head scintimammographic examination comprising: 1) acquiring a pair of digital images from a pair of small FOV or mini gamma cameras compressing the breast under examination from opposing sides; 2) inverting one of the pair of images to align or co-register with the other of the images to obtain co-registered pixel values; 3) normalizing the pair of images pixel-by-pixel by dividing pixel values from each of the two acquired images and the co-registered image by the average count per pixel in the entire breast area of the corresponding detector; and 4) multiplying the number of counts in each pixel by the value obtained in step 3 to produce a normalization enhanced two dimensional contrast map. This enhanced (increased contrast) contrast map enhances the visibility of minor local increases (uptakes) of activity over the background and therefore improves lesion detection sensitivity, especially of small lesions.

The invention discloses an X-ray imaging system and method based on grating phase contrast and photon counting. X-rays become coherent X-rays after being shaped through a light source grating; the coherent X-rays containing phase changes after penetrating through samples form beam-split X-rays through a phase grating; the phase changes of the X-rays are converted into light intensity changes after the X-rays pass an analyzing grating; a photon counting detector is used for recording phase contrast information of the X-rays with different intensities; sectional images based on phase contrast are obtained through a three-dimensional reconstruction system; finally, components and interior fine structure information of the soft tissue samples are obtained. The system and method can be used for detecting soft tissue samples in the pathology department, the radiology department and the scientific research department of a hospital, early lesion information such as small lesions in the tissue samples can be found easily, and the detection rate is greatly increased.

The invention discloses a gastrointestinal tract contrast agent, which comprises the following composition in parts by weight: in 1000 parts of purified water, any one or several combinations of iodine and iodide containing 0.3-20 parts of pure iodine , wherein iodine and iodide are calculated as pure iodine with a purity of 100%, and 1-8 parts of food-grade liquid paraffin. The advantages are: safe, effective, non-toxic and side effects, the contrast agent can quickly fill the site to be contrasted, and the contrast agent in the filling cavity forms a certain threshold contrast density with adjacent organs and lesions (foci) and is an oral contrast agent for imaging. After drinking this product, the intestinal tract is not easily absorbed and empties quickly; the physical and chemical properties are stable, the contrast is obvious, the image is clear, and the effective diagnosis rate is over 97%, especially for the observation and identification of small lesions (foci) in the middle, lower abdomen and pelvic cavity. It is superior and can improve the sensitivity and specificity of detecting early tumors and lesions of the gastrointestinal tract.

The invention relates to an endoscopic intracavitary lesion locator, which is used in conjunction with an endoscope, and is characterized in that: the intracavity lesion locator includes a fixing device and a locator connected to each other, and the fixing device is used to fix the lesion , the locator includes a housing, the housing is provided with a positioning signal transmitter, a signal transmitter remote control switch and a battery, the positioning signal transmitter is electrically connected to the battery and the signal transmitter remote control switch, and the signal transmitter remote control switch receives instructions , and control the positioning signal transmitter to emit positioning signals. The present invention is ingenious in structure, easy to operate, and can be used in conjunction with an endoscope: when a lesion is found during endoscopic examination, the present invention is released and fixed on the lesion through the operation hole of the endoscope, and helps the doctor to inspect the cavity during minimally invasive surgery. Accurate positioning of small lesions, improving surgical efficiency, and avoiding positioning errors.

The present invention proposes an image processing method and device, wherein the method includes: scanning the skin part of the patient to be diagnosed to form a first image for diagnosis; inputting the first image into a deep learning model for learning, and obtaining The position information of the minimum lesion area in the first image; according to the position information and the image edge detection algorithm, the original image and mask image including the minimum lesion area are obtained from the first image; the mask image and the original image are fused to obtain The target image corresponding to the minimum lesion area; wherein, the target image is an image used for diagnosing the minimum lesion area, and the pixels in the target image are in one-to-one correspondence with the pixels in the original image and the mask image. The method realizes the accurate positioning of the smallest lesion area from the captured image and extracts the image of the smallest lesion area, which reduces the labor cost and solves the problem of high labor cost in the existing method of manually locating the diseased area.

The invention relates to an optical fiber finger for detecting flexibility of a prostate and a detection method. The optical fiber finger comprises a laser light source, a sine excitation wave, a medical plastic membrane for being in contact with the prostate, a mono-mode sensing optical fiber for sensing vibration of the membrane, a 45-degree end face angle sensing mono-mode optical fiber processed by a polishing process, an optical fiber connector for connecting the mono-mode sensing optical fiber and an optical fiber detector, and an optical fiber detector for detecting toughness information of tissues. Aiming at the technical requirements on direct detection of the prostate, the invention designs the low-cost optical fiber finger capable of penetrating into a human body so as to carry out diagnosis on prostatic lesions; the size of each sensor is smaller than 5mm; paint brought to a patient by the prostatic lesions is greatly reduced. Meanwhile, small lesion tissues difficult to find can be detected, so that probability of finding abnormal tissues in the early stage is improved.