362 results about "Stress radiography" patented technology

A large diameter, flexible, kink-resistant and rotatable introducer sheath ( 10 ) for percutaneous delivery of a contained and implantable medical device in the vasculature of a patient. The introducer sheath includes a reinforcement such as a flat wire coil ( 23 ) fitted about an inner, lubricous material such as polytetrafluoroethylene tube ( 22 ). A wire braid ( 25 ) is placed around the coil to give good transfer of rotational forces. An outer tube ( 27 ) of a heat formable polyamide material is heat formed and compressed through the spaces between the wires of the braid and turns of the wire coil to mechanically connect the outer tube to the roughened outer surface of the inner tube. The durometer of the outer tube can be varied to effect the flexibility of the sheath. A radiopaque marker ( 42 ) is positioned at the distal end of the coil and around the inner tube for radiographic visualization.

Pairs of stereo Xray radiographs are obtained from an X-ray imaging system and are digitized to form corresponding pairs of stereo images (602, 604). The pairs of stereo images (602, 604) are adjusted (410) to compensate for gray-scale illumination differences by grouping and processing pixel groups in each pair of images. Distortion in the nature of depth plane curvature and Keystone distortion due to the toed-in configuration of the X-ray imaging system are eliminated (412). A screen parallax for the pair of stereo images is adjusted (414) to minimize depth range so as to enable a maximum number of users to view the stereoscopic image, and particular features of interest.

Disclosed herein is a novel medical wire device which is equipped with a filter unit, capable of surely capturing free embolismic debris upon angioplasty of a constriction lesion in a lumen, capable of easily confirming a developed state of a filter under radiography by a surgeon, and thus improved in function of the filter unit. The medical wire device of the present invention comprises a filter unit which is to be located, upon angioplasty of a constriction lesion in a lumen, on a distal side from the constriction lesion for capturing free embolismic debris separated from an inner wall of the constriction lesion, and a wire provided with the filter unit at its distal-side end. A filter is made up of a metal having radiopaque property.

When radiographic images are obtained by radiography using a tomographic image obtainment apparatus, the degree of overlap of anatomical structures of a subject is obtained. Further, a condition of exposure, such as angles θ of radiography, is changed based on the degree of overlap. The angles θ of radiography are angles at which a radiation irradiation unit performs radiography at a plurality of positions to obtain a plurality of radiographic images. The tomographic image obtainment apparatus produces a tomographic image by reconstructing the tomographic image from a plurality of radiographic images obtained by irradiating the subject with radiation from various directions.

Processing of up to a plurality of radiographic images of a subject, includes the capture of at least two visible light images of the subject, two or more of the visible light images in correspondence to at least one radiographic image. The visible light images are captured by one or more visible light cameras, each visible light camera in a known geometric relation to the radiographic source. Radiographic geometry of each radiographic image is calculated relative to the radiographic source and the subject through stereoscopic analysis of the visible light images and through reference to the known geometric relation between the one or more visible light cameras and the radiographic source. Three-dimensional radiographic information on the subject is generated and manipulated by processing the up to a plurality of radiographic images based on the recovered radiographic geometry.

Drilling of an implant shaft is carried out with a handpiece tool whose location and angular orientation with respect to a radiographic working guide is updated in real time with respect to the radiographic working guide and anatomical structures of the patient, free of viewing obstructions. Prior to the drilling, the radiographic working guide is fitted to a particular patient. Real-time imaging support is provided on a display of a computer, wherein the radiographic workpiece guide includes a plurality of fiducial markers that define a substantially planar reference surface of the radiographic workpiece guide. The radiographic workpiece guide also includes an alignment structure located a predetermined distance from a pilot hole proximate the work site. The image is updated based on an initial radiographic scan and updated position information from the handpiece tool as to location and angular orientation of the handpiece tool relative to the workpiece guide.

A radiological image detection apparatus includes a first grating unit, a grating pattern unit, a radiological image detector, and an anti-scatter grating. The grating pattern unit has a period that substantially coincides with a pattern period of a radiological image formed by radiation having passed through the first grating unit. The radiological image detector detects the radiological image masked by the grating pattern unit. The anti-scatter grating is arranged on a path of the radiation incident onto the radiological image detector and removes scattered radiation. A smoothing process is performed for at least one of a surface and a backside of the anti-scatter grating intersecting with a traveling direction of the radiation.

A device for use in optical scanning and CT scanning including a radiographic template and at least one shape of known dimension (SKD). The radiographic template includes a plurality of radio-opaque markers and is configured to take an impression of at least one surface of a patient. The SKD is removably attached to the radiographic template and serves as a basis for registration of data of a CT scan of the device with data of an optical scan of the device. The device may further comprise a mounting plate. The SKD is mounted on the mounting plate such that the at least one SKD is in an exact same position with respect to surfaces in a model formed from the impression as when the impression of the patient is formed in the radiographic template.

The present invention provides a radiographic imaging device including: plural pixels disposed in a matrix, each pixel including a sensor section that generates charges based on irradiation of radiation, or on illumination of light that has been converted from radiation; plural scan lines through which a control signal flows for switching switch elements included in pixels that are employed as radiographic imaging pixels out of the plural pixels; plural signal lines through which electrical signal flow corresponding to the charge that has been accumulated in the radiographic imaging pixels according to the switching state of the switch elements; and one or more radiation detection line through which an electrical signal flows corresponding to the charge that has been generated in the sensor sections of the radiation detection pixels out of the plural pixels.

A digital radiography detector includes a housing having first and second spaced planar members and four side walls defining a cavity. A radiographic image detector assembly is mounted within the cavity for converting a radiographic image to an electronic radiographic image. The detector assembly includes a detector array mounted on a stiffener. A shock absorbing elastomer assembly is located within the cavity for absorbing shock to the detector array / stiffener in directions perpendicular to and parallel to the detector array / stiffener.

A radiation-transmissive type target structure includes a target layer formed on a substrate. The target layer has a thickness equal to or less than 20 μm, and is configured to generate radiation in response to irradiation of electrons. A surface of the target layer is formed with projecting portions and depressed portions, the depressed portions have a depth of at least half the thickness of the target layer. Advantageously, separation of the target layer at an interface between the substrate and the target layer is substantially prevented. A radiation generating apparatus and a radiography system equipped with the target structure are also disclosed.

A prosthetic heart valve having identifiers for aiding in radiographic positioning is described.

The invention discloses a radiological image detection apparatus, a radiographic apparatus and a radiographic system. The radiological image detection apparatus includes a first grating unit, a grating pattern unit, a radiological image detector, and an anti-scatter grating. The grating pattern unit has a period that substantially coincides with a pattern period of a radiological image formed by radiation having passed through the first grating unit. The radiological image detector detects the radiological image masked by the grating pattern unit. The anti-scatter grating is arranged on a path of the radiation incident onto the radiological image detector and removes scattered radiation. A smoothing process is performed for at least one of a surface and a backside of the anti-scatter grating intersecting with a traveling direction of the radiation.

Enhanced radiographic detection is provided by an endodontic marking instrument having a highly radiopaque elongate member, thereby enabling a dentist to better identify the location of the instrument in a root canal and the length of the root canal. The highly radiopaque, high contrast material of the elongate member is a non-toxic, material such as gold, platinum, palladium, silver, tungsten, and the like. The endodontic marking tools of the present invention are distinctly visible on radiographic images in light of the substantial contrast between the highly radiopaque material and the tooth of the patient.

A method for providing a reduced exposure value for radiographic imaging obtains a set of flat-field images at two or more exposure values and measures the noise power spectra using the flat field images. At least one noise table is generated according to interpolated noise power spectra for a set of predetermined exposure values. Values from the at least one noise table are applied to a clinical image to form a reduced exposure simulation image. A noise mask is generated according to at least one noise table and the exposure values of the reduced exposure simulation image and added to the reduced exposure simulation image. The reduced exposure simulation image is assessed to generate a desired dose reduction factor.

An image processing apparatus includes: an image obtaining device which obtains a breast image obtained by radiography of a breast; a mammary gland region extracting device which extracts a mammary gland region from the breast image; a local region setting device which sets a plurality of local regions around pixels belonging to the extracted mammary gland region; a local contrast value calculating device which calculates a plurality of local contrast values in a local regions, for each of the set plurality of local regions; and an image processing device which applies image processing to the breast image on the basis of the calculated plurality of local contrast values. Thus, considering a contrast between a mammary gland and a fat region, a stable image processing result can be obtained while enhancing viewability of a local mammary gland structure and a lesion.

In a radiographic system and a radiographic image generating method that generate a phase contrast image and an absorption image of an subject, the absorption image in which density irregularity is removed or reduced is generated on the basis of a plurality of pieces of image data obtained for generating the phase contrast image.

In a radiographic apparatus, a radiation image detector or first and second gratings are structured in such a manner to be attachable to the radiographic apparatus and detachable therefrom. The radiographic apparatus includes a cassette attachment / detachment detection unit that detects attachment and detachment of the radiation image detector, or a grid attachment / detachment detection unit that detects attachment and detachment of the first and second gratings. The apparatus further includes a preliminary irradiation control unit that controls a radiation source so that preliminary irradiation for detecting a relative positional deviation between the first and second gratings and the radiation image detector is performed when attachment or detachment of the radiation image detector, or the first and second gratings has been detected.

An X-ray imaging control apparatus acquires radiographic data obtained from an X-ray imaging apparatus which controls an X-ray dose upon X-ray imaging by detecting the X-ray dose in one or a plurality of detection regions, and displays a radiographic image on the basis of the acquired radiographic data. At this time, detection region information indicating the position and range of each detection region used in the X-ray imaging apparatus upon generating the radiographic data is acquired. Based on this detection region information, an image indicating each detection region is superimposed on the displayed radiographic image.

A system and method of providing information concerning pathological findings evidenced by radiographical reports. A medical care provider may request a radiographical image, in particular, an MRI image of a region of the body. The region of the patient's body is scanned and the images are read and interpreted to determine if there is a positive finding of a pathology. If a pathology is detected, the generated scanned images are reviewed for a radiographical image that best depicts the detected pathology and the image is selected for further annotation. The image is then annotated to highlight and more fully describe and delineate the pathology thus alerting the medical care provider of the pathology's existence. In addition, the report may be further delineated with an identifying mark informing the referring physician of a positive finding of a pathology.

A radiographic image capture system includes: a radiographic image capture section, an output section and a generation section. The radiographic image capture section has plural radiographic imaging devices are placed adjacent to each other in a predetermined direction. Each of the radiographic imaging devices independently performs an imaging action, a preparatory action that is performed before the imaging action, and a transition action in which the radiographic imaging device transitions, in response to a transition command, from a first state in which the radiographic imaging device performs the preparatory action to a second state in which the radiographic imaging device performs the imaging action. The output section outputs the transition command to the plurality of radiographic imaging devices when imaging condition data has been input. The generation section combines image data acquired by the radiographic imaging devices and generates elongated image data representing an elongated radiographic image.

In a radiographic method using a mobile radiographic apparatus including an image generating unit which includes photoelectric conversion elements and generates radiographic image data of an object, key information for selecting radiographic request information is transmitted to an external information system having the radiographic request information. The radiographic request information transmitted from the information system is received. The operation of the image generating unit is controlled based on the received radiographic request information.

A bone graft that is made at least partially of synthetic material or demineralized bone matrix and is manufactured in suitable shape and / or dimensions to augment an alveolar ridge. The bone graft may be such as to augment both a portion of the crest of the alveolar ridge and a portion of at least one side of the alveolar ridge. The graft may include at least one hole for the intended position of an implant base, and / or at least one hole for attachment hardware. The graft may be manufactured to standard dimensions or it may be manufactured to patient-unique dimensions which may be determined radiographically prior to surgery and prior to manufacturing of the bone graft. The bone graft may be able to be carved for dimensional adjustment during surgery. The bone graft may have composition and / or local geometry which varies from one place to another, and may have a particular composition and / or local geometry at places intended to adjoin natural bone.

A collection device and method of use for excised tissue immobilization, removal of core samples from immobilized tissue and transport of the tissue for specimen radiography and pathological analysis. The collection device is comprised of a base member having an annular bottom wall and a side wall upwardly extending from the peripheral edge of the side wall, a lid member having a top wall and a skirt circumscribing the side wall and extending downwardly therefrom, and an incremental latching mechanism for securing the lid member to the base member. The side wall of the lid member includes a plurality of apertures positioned around at least a portion of the circumference of the side wall. In use, a tissue specimen placed in the base member is immobilized by compressing the tissue between the top wall of the lid member and the bottom wall of the base member and securing the lid member and base member together with the latching mechanism. A core sample can be removed from the immobilized specimen by inserting a portion of a sampling device through an aperture. The remainder of the specimen can be transported as needed for pathological or radiographic analysis.

A method of image information enhancement in radiography relates to image information processing techniques in radiography. The method comprising steps of: normalizing an acquired image A(x,y) to form a normalized image B(x,y); filtering the normalized image B(x,y) by a low-pass filter to obtain an filtered image C(x,y); calculating a relative standard deviation for each pixel in the image A(x,y), three times the relative standard deviation being an edge threshold for each pixel; thresholding a difference image obtained by subtracting the filtered image C(x,y) from the normalized image B(x,y) by using the edge threshold for each pixel to form a threshold-processed image D(x,y); enhancing a contrast of the threshold-processed image D(x,y) by using a non-linear function to form a contrast-enhanced image E(x,y); determining a enhancement coefficient a(x,y); obtaining a edge-enhanced image F(x,y) by multiplying the enhancement coefficient a(x,y), the contrast-enhanced image E(x,y) and the filtered image C(x,y); and generating a resulting image by multiplying a sum of the edge-enhanced image F(x,y) and the filtered image C(x,y) with the maximum value Amax As compared with the prior arts, the inventive method has a fast processing speed for image information enhancement and a simple algorithm, images clearly, eliminates noises in the images, and satisfies the requirements of relatively more enhancement to the contrast of the dark regions in the scanned images.

Some embodiments are associated with an X-ray source configured to generate X-rays directed toward an object, wherein the X-ray source is to: (i) generate a first energy X-ray pulse, (ii) switch to generate a second energy X-ray pulse, and (iii) switch back to generate another first energy X-ray pulse. A detector may be associated with multiple image pixels, and the detector includes, for each pixel: an X-ray sensitive element to receive X-rays; a first storage element and associated switch to capture information associated with the first energy X-ray pulses; and a second storage element and associated switch to capture information associated with the second energy X-ray pulse. A controller may synchronize the X-ray source and detector.

The present invention provides a radiographic imaging device, radiographic imaging system, a program for controlling the radiographic imaging device, and a method for controlling the radiographic imaging device that may accurately detect start of irradiation of radiation even noises are generated by interference or the like. When radiation is irradiated, electric signals outputted from radiation detection pixels in charge accumulation period are detected by signal detection circuit during detection period. Control section determines whether time variation of the electric signals feature pre-specified characteristics of noise. If not, the start of the irradiation of radiation has been properly detected, the charge accumulation period continues, and radiographic image is imaged. However, if the electric signals feature the pre-specified characteristics, it is determined that the start of the irradiation of radiation has been misdetected, the charge accumulation period is stopped, and is switched to radiation detection period.

A radiographic apparatus includes a columnar crystal phosphor which converts X-rays into visible light, a photodetector which converts the visible light into an electrical signal, and a case (a case lid and case main body) which houses the columnar crystal phosphor and photodetector. A buffer member which buffers a force from outside the case (the case lid and case main body) and a highly rigid member which has higher rigidity than that of the columnar crystal phosphor are arranged between the case (the case lid and case main body) and columnar crystal phosphor.