35 results about "Densitometry" patented technology

Embodiments of the present invention include methods and systems for three-dimensional reconstruction of a tubular organ (for example, coronary artery) using a plurality of two-dimensional images. Some of the embodiments may include displaying a first image of a vascular network, receiving input for identifying on the first image a vessel of interest, tracing the edges of the vessel of interest including eliminating false edges of objects visually adjacent to the vessel of interest, determining substantially precise radius and densitometry values along the vessel, displaying at least a second image of the vascular network, receiving input for identifying on the second image the vessel of interest, tracing the edges of the vessel of interest in the second image, including eliminating false edges of objects visually adjacent to the vessel of interest, determining substantially precise radius and densitometry values along the vessel in the second image, determining a three dimensional reconstruction of the vessel of interest and determining fused area (cross-section) measurements along the vessel and computing and presenting quantitative measurements, including, but not limited to, true length, percent narrowing (diameter and area), and the like.

A system for spectroscopic imaging of bodily tissue in which a scintillation screen and a charged coupled device (CCD) are used to accurately image selected tissue. Applications include the imaging of radionuclide distributions within the human body or the use of a dual energy source to provide a dual photon bone densitometry apparatus that uses stationary or scanning acquisition techniques. An x-ray source generates x-rays which pass through a region of a subject's body, forming an x-ray image which reaches the scintillation screen. The scintillation screen reradiates a spatial intensity pattern corresponding to the image, the pattern being detected by a CCD sensor. The image is digitized by the sensor and processed by a controller before being stored as an electronic image. A dual energy x-ray source that delivers two different energy levels provides quantitative information regarding the object being imaged using dual photon absorptiometry techniques. Dual scintillation screens can be used to simultaneously generate images of low-energy and high-energy x-ray patterns. Each image is directed onto an associated respective CCD or amorphous silicon detector to generate individual electronic representations of the separate images.

A digital modality modeling system includes a computer with a digital memory adapted for storing patient densitometry information, an input and an output. An input subsystem includes a pair of source/receptor units mounted on a signal positioning subsystem, which is adapted for moving the source/receptor units through predetermined paths of movement, which can be circular or linear. The resulting tomographic data is synthesized to form any 3-D model or image, which is output for further analysis. A digital tomosynthesis method includes the steps of moving a pair of sensor/receptor units relative to a patient. The resulting signals output by the receptor are digitized and synthesized to form a 3-D image or model. Multiple depths of penetration and multiple widths can be captured from single acquisitions using digital tomosynthesis signal processing techniques.

Embodiments of the present invention include methods and systems for three-dimensional reconstruction of a tubular organ (for example, coronary artery) using a plurality of two-dimensional images. Some of the embodiments may include displaying a first image of a vascular network, receiving input for identifying on the first image a vessel of interest, tracing the edges of the vessel of interest including eliminating false edges of objects visually adjacent to the vessel of interest, determining substantially precise radius and densitometry values along the vessel, displaying at least a second image of the vascular network, receiving input for identifying on the second image the vessel of interest, tracing the edges of the vessel of interest in the second image, including eliminating false edges of objects visually adjacent to the vessel of interest, determining substantially precise radius and densitometry values along the vessel in the second image, determining a three dimensional reconstruction of the vessel of interest and determining fused area (cross-section) measurements along the vessel and computing and presenting quantitative measurements, including, but not limited to, true length, percent narrowing (diameter and area), and the like.

Process for use of an osteodensitometry system using dual-energy cone beam X-rays. The system (1) comprises an X-ray source (1a) capable of supplying a cone X-ray beam with at least a first energy called the high energy and a second energy called the low energy, a two dimensional X-ray detector (2) and electronic means (3a, 3b) for processing images supplied by this detector. According to this process, the low energy image of a part of the anatomy of a patient (1c) is acquired, and the high energy image of this part of the anatomy is acquired, and these images acquired at low energy and at high energy are matched before building up the map of bone densities of the part of the anatomy.

An ultrasonic bone densitometer system is provided in a kiosk environment using computer driven patient instructions and simplified sanitizing procedures to allow unsupervised use by members of the public for screening purposes.

A novel set of biopsy-gun related tools are developed in order to make a better safer sampling and diagnosis, comprising a set of tools that takes the sample, releases a drug impregnated plug and additionally may inject drugs, measure pH and the molecular content of the penetrated tissues.

A novel technology aiming to minimize the penetrated tissue damage, using a small diameter needle with capabilities for immediate spectroscopic analysis of the tissue, and followed by sampling and plugging of the tissue when needed.

The invention describes a set of variable diameter thin tubes used to guide and insulate the penetrated organs, and a final operation of plugging the wounds with absorbable substances, impregnated with drugs.

The supplementary low intensity radiation sources could increase the processes' accuracy and safety, offering the opportunity of gathering supplementary x-densitometry information.

An osseo classification and digital modality modeling system includes a computer with a digital memory adapted for storing patient densitometry information, an input and an output. An input subsystem includes a pair of source/receptor units mounted on a signal positioning subsystem, which is adapted for moving the source/receptor units through predetermined paths of movement, which can be circular or linear. The resulting tomographic data is synthesized to form any 3-D model or image, which is output for further analysis and classifying osseo structure and/or prosthetic osseointegration. An osseo classification and digital tomosynthesis method includes the steps of moving a pair of sensor/receptor units relative to a patient. The resulting signals output by the receptor are digitized and synthesized to form a 3-D image or model. Multiple depths of penetration and multiple widths can be captured from single acquisitions using digital tomosynthesis signal processing techniques. Osseo structure and/or prosthetic osseointegration is classified using the densitometry data.

An x-ray apparatus and method can improve x-ray imaging in a variety of ways. For example, the improve x-ray apparatus can reduce scatter from x-ray images acquired by two-dimensional detectors. An improved 2D x-ray apparatus can provide 3D imaging for medical and/or industrial applications. An improved 2D x-ray apparatus and method can produce separate material imaging, and composition analysis for characterization and correlation of image, densitometry, and composition information of individual component or individual material within a single subject. Non-rotational 3D microscopy, combining 2D or 3D full field x-ray imaging and high resolution 2D or 3D x-ray microscopy or spectral absorptiometry and spectroscopy can achieve a higher resolution and wider field of view in x-ray imaging and quantitative analysis in 3D and real time. The x-ray apparatus can improve tracking and/or surgical guidance in time and/or space.

The invention relates to a method of measuring the real density of the powder using double density bottles, which including the following steps: 1) weighing the quality of the density bottle A and B with the mass of ma and mb accurately, filling the bottle with agent fluid and weighing the quality m1, m2, checking the dielectric fluid density Rho0 corresponding to the temperature, compute the volume of the two bottle va, vb; 2) filling the bottle B with the powder to be measured, weighing the quality m3, and m[sample]=m3-mb; then filling the agent fluid to the surface of the powder 4.8-5.2mm, putting it to the vacuum chamber and pumping to the critical boiling point, keeping 28-32 minutes until the air bubble in the powder space output completely; 3) filling the agent fluid to bottle A,B at the same time, measuring the quality of bottle A m4, bottle B m5; 4) computing the sample's mass density according to the following formula: rho[sample]=m[sample]/v[sample]=(m3-mb)(m4-ma)/[(m4-ma)vb-(m5-m3)va].

The in vivo three component areal density composition of a patient along a transmitted x-ray beam is derived by raster-scanning a collimated x-ray beam across a bony region of the patient, with each point scanned at different energies, and using matrix equations with a priori spectra information to solve for the relative areal density of soft tissue, fat and bone.

The image of an object is improved by estimating the scattered radiation that it transmits to the detectors. To achieve this, one uses the scattered radiation effectively measured through an imitation of the object, having analogous attenuation properties, and which one modifies by the weighting coefficients obtained by a transformation of the values of the total radiation received through the object (3) and the selected imitation (8). One thus manages to improve the image without subjecting the object to a double irradiation in order to measure the scattered radiation separately. The principal applications are tomography, bone densitometry and non-destructive controls.

A DGT (diffusive gradients in thin films) method for determination of phosphorus content on the basis of computer-imaging densitometry (CID) technology is as follows: a ZrO2 phosphorus fixation film is assembled into a DGT (diffusive gradients in thin films) device, the DGT device is put in a phosphorus medium for phosphorus absorption, then the film is put in hot water of 85 DEG C for heat treatment for 5 days to promote further fixation of phosphorus absorbed by the film, the ZrO2 phosphorus fixation film is put in a colorant for coloring, a scanner is used for scanning of the colored film, software is used for converting image color obtained by the scanning into gray scale, and according to an established phosphorus accumulation amount and surface gray scale calibration curve of the ZrO2 phosphorus fixation film, the obtained gray scale is converted into phosphorus accumulation amount; and the phosphorus content in the phosphorus medium can be calculated by use of Fick's first law of diffusion according to the phosphorus accumulation amount in the phosphorus fixation film surface. According to the method, the CID technology is used to avoid slicing, extracting and other operation, and the phosphorus accumulation amount in the phosphorus fixation film, the phosphorus content in the phosphorus medium, spatial distribution and other information and can be quickly and easily obtained.

An apparatus for bone densitometry (1) comprises a patient-carrier frame (2) fitted with a support surface (21) for a patient and an arm (3) movable with respect to the frame (2) in a longitudinal direction (X) from the feet to the head of the patient. The arm is fitted with a generator-detector assembly comprising an X-ray generator (31) and an X-ray detector (32), mechanically aligned so that the collimated beam (F) of X-rays produced by the generator (31) centres the detector (32). In particular, the frame is a monocoque (2) and fully supports, at the support surface (21), the arm (3) in order to leave the space underneath the frame (2) free. Advantageously, moreover, in the case of apparatus with frame (2) made of aluminium, the frame itself also serves as a filter for X-rays.

The invention relates to the technical field of biomedical research, and in particular relates to a construction method of a model for cynomolgus monkey osteoporosis caused by oophorectomy. The technical scheme is as follows: the cynomolgus monkey osteoporosis model is established through bilateral oophorectomy, then, through detection on serum bone conversion related indicators, lumbar vertebra bone densitometry, cancellous bone tissue morphologic and metrological testing and lumbar vertebra compression testing, the bone quality in each group is evaluated, the parameters show that due to theoophorectomy surgery, the bone absorption and bone formation parameters are increased, the bone mass and bone density are obviously reduced, and the mechanical strength is reduced. With the method, the model for cynomolgus monkey osteoporosis caused by oophorectomy can be effectively established, and reliable data for the treatment process is provided for further studying the osteoporosis of postmenopausal women medically.

A method of measuring a flow line deposit comprising: providing a pipe comprising the flow line deposit; measuring unattenuated photon counts across the pipe; and analyzing the measured unattenuated photon counts to determine the thickness of the flow line deposit and associated systems.

The invention relates to a method for measuring cotton fiber maturity based on an optical density method. The cotton fiber maturity is tested by using the optical density of the cotton fiber after iodine coloring. When the cotton fiber maturity is high, the more cellulose content, the higher the iodine blue reaction product concentration Higher, the greater the measured optical density, the concentration of liquid A is divided into four grades, namely A, A/2, A/4, A/8, and the best A solution concentration of A/4 tests the average optical density of cotton fibers, which can Clearly judge whether the cotton fiber is over-ripe, mature or immature. In the invention, under the action of swelling agent, the average optical density of the iodine blue reaction product between colored cotton fiber and iodine can indicate the maturity of cotton fiber. The invention has simple operation, high degree of automation, and is convenient for measurement on a general-purpose microscope.