Abstract: The present disclosure relates to a method for vascular imaging and determining dynamic vascular parameters of blood flow. According to an embodiment, the present disclosure relates to an apparatus and method of determining dynamic vascular parameters of blood flow, comprising acquiring two-dimensional projection images of a vascular region of interest at a predetermined frequency, the vascular region of interest being downstream of a site of vascular administration of a radio-opaque medium, identifying, within the acquired two-dimensional projection images, heterogeneities of the radio-opaque medium, and determining the dynamic vascular parameters of the blood flow based on spatial movements of the identified heterogeneities of the radio-opaque medium. In an embodiment, the predetermined frequency is greater than 100 Hz.

Abstract: The present disclosure relates to a method for vascular imaging and determining dynamic vascular parameters of blood flow. According to an embodiment, the present disclosure relates to an apparatus and method of determining dynamic vascular parameters of blood flow, comprising acquiring two-dimensional projection images of a vascular region of interest at a predetermined frequency, the vascular region of interest being downstream of a site of vascular administration of a radio-opaque medium, identifying, within the acquired two-dimensional projection images, heterogeneities of the radio-opaque medium, and determining the dynamic vascular parameters of the blood flow based on spatial movements of the identified heterogeneities of the radio-opaque medium. In an embodiment, the predetermined frequency is greater than 100 Hz.

Abstract: An X ray diagnostic apparatus includes an X ray tube generating X rays, a first detector detecting the X rays, at least one second detector arranged in front of a first detection surface of the first detector and including a second detection surface narrower than the first detection surface and indicator points provided on a rear surface of the second detection surface, a projection data generation unit generating first projection data based on an output from the first detector, and a positional shift detection unit detecting a positional shift of the second detector relative to the first detector in accordance with an imaging direction by using the first projection data and a predetermined positional relationship between the points and detection elements in the second detector.

Abstract: Methods and systems of displaying an image of an object are described. The displayed image is comprised of at least two parts that are displayed so as to present a unified image of the object. One part of the image is derived using a first temporal filter and the other part of the image is derived using a second temporal filter.

Abstract: A radiography apparatus includes a radiation source, a radiation detector, and processing circuitry. The processing circuitry is configured to obtain an X-ray image of an object, obtain a focal spot size of a radiation source used to generate the obtained X-ray image, and estimate a magnification of the obtained X-ray image. The processing circuitry is also configured to obtain, using a look-up table and the obtained focal spot size, a deconvolution kernel. The processing circuitry is also configured to generate a corrected X-ray image by performing a deconvolution operation on the obtained X-ray image using the obtained deconvolution kernel and the estimated magnification.

Abstract: A radiography apparatus includes a radiation source, a radiation detector, and processing circuitry. The processing circuitry is configured to obtain an X-ray image of an object, obtain a focal spot size of a radiation source used to generate the obtained X-ray image, and estimate a magnification of the obtained X-ray image. The processing circuitry is also configured to obtain, using a look-up table and the obtained focal spot size, a deconvolution kernel. The processing circuitry is also configured to generate a corrected X-ray image by performing a deconvolution operation on the obtained X-ray image using the obtained deconvolution kernel and the estimated magnification.

Abstract: An X ray diagnostic apparatus includes an X ray tube generating X rays, a first detector detecting the X rays, at least one second detector arranged in front of a first detection surface of the first detector and including a second detection surface narrower than the first detection surface and indicator points provided on a rear surface of the second detection surface, a projection data generation unit generating first projection data based on an output from the first detector, and a positional shift detection unit detecting a positional shift of the second detector relative to the first detector in accordance with an imaging direction by using the first projection data and a predetermined positional relationship between the points and detection elements in the second detector.

Abstract: An X ray diagnostic apparatus includes an X ray tube generating X rays, a first detector detecting the X rays, at least one second detector arranged in front of a first detection surface of the first detector and including a second detection surface narrower than the first detection surface and indicator points provided on a rear surface of the second detection surface, a projection data generation unit generating first projection data based on an output from the first detector, and a positional shift detection unit detecting a positional shift of the second detector relative to the first detector in accordance with an imaging direction by using the first projection data and a predetermined positional relationship between the points and detection elements in the second detector.

Abstract: An X ray diagnostic apparatus includes an X ray tube generating X rays, a first detector detecting the X rays, at least one second detector arranged in front of a first detection surface of the first detector and including a second detection surface narrower than the first detection surface and indicator points provided on a rear surface of the second detection surface, a projection data generation unit generating first projection data based on an output from the first detector, and a positional shift detection unit detecting a positional shift of the second detector relative to the first detector in accordance with an imaging direction by using the first projection data and a predetermined positional relationship between the points and detection elements in the second detector.

Abstract: Methods and systems of displaying an image of an object are described. The displayed image is comprised of at least two parts that are displayed so as to present a unified image of the object. One part of the image is derived using a first temporal filter and the other part of the image is derived using a second temporal filter.

Abstract: The present invention relates to an imaging system, computer readable medium, and method for dynamic imaging of an object to be examined. The imaging system includes detection array comprising an array of modular devices positioned such that one or more modular devices are capable of simultaneously receiving at least a portion of a first output signal from an emission source of an object to be imaged, each of said modular devices comprising a detector device, wherein each of the modular devices in the array is capable of converting at least a portion of the first output signal to a second output readout.

Abstract: The present invention relates to a stent including a variable porosity, tubular structure having pores defined by structural surfaces. The tubular structure has a low porosity region in proximity to or at either end of the tubular structure, where the low porosity region is less porous than other regions located on the tubular structure and fully or partially obstructs passage of fluid. Any arcuate path that starts at one point within the low porosity region and goes around the perimeter of the tubular structure to stop at the same point within the low porosity region must have at least a portion that is outside of the low porosity region. Also disclosed is a method of modifying blood flow within and near an opening of an aneurysm in a blood vessel by deploying one or more stents of the present invention near an opening of the aneurysm in a blood vessel.

Abstract: The present invention relates to a stent including a variable porosity, tubular structure having pores defined by structural surfaces. The tubular structure has a low porosity region on a path around the tubular structure, where the low porosity region is less porous than other regions located on the path and fully or partially obstructs passage of fluid. The low porosity region is larger than the structural surfaces between adjacent pores. Also disclosed is a method of altering blood flow within and near an opening of a defective blood vessel involving deploying the above stent of the present invention in a defective blood vessel so that the low porosity region is aligned to and in contact with an opening in the defective blood vessel, thereby altering blood flow within and near the opening of the defective blood vessel.

Abstract: A micro-injection pump for angiography and micro-intervention procedures comprises first and second linear traverses each have a pusher element movable by stepper motor drive for controlling discharge from a respective micro-syringe engaged by the pusher element. The first micro-syringe preferably contains a volume of a soluble contrast medium, and the second micro-syringe preferably contains a volume of an insoluble contrast medium. Fluid discharged by the micro-syringes is directed to a bifurcated micro-droplet generator having a straight primary passage and an obliquely merging tributary passage. Insoluble contrast medium from the second micro-syringe flows through a micro-sized injection needle extending partially and coaxially within the primary passage to a termination point just downstream from where the tributary passage joins the primary passage.

Abstract: A radiographic imaging apparatus and method for vascular interventions for acquiring very high resolution radiographic images over a small region of interest (ROI). The apparatus and associated method employs digital solid state x-ray image detectors for the medical imaging application of angiography. A mechanical arrangement, for example an arm attached to an existing large area x-ray detector, allows the small area ROI digital detector to be temporarily positioned over a region located by the standard large area imager so that additional very high resolution digital images may be obtained over the ROI.

Abstract: An apparatus and method for reducing detection of radiation scatter from an object through which radiation passes from a source to a radiation detection means having a detecting surface. The apparatus comprises at least one radiation shield having front and rear curvilinear shield surfaces. Each of the curvilinear shield surfaces, with projected continuations thereof, is circularly symmetrical about a central axis. Each shield surface, or its projected continuation, intersects the axis at an apex. The front and rear surfaces share the same central axis. The apparatus further includes a means for mounting the shield, between the object and the detecting surface, to make it movable about the central axis and to align the central axis on a straight line from the source to the apexes of the surfaces so that all radiation passing from the source through the object must pass once through the shield, when the shield is in motion about the axis, before the radiation strikes the detecting surface.

Abstract: A process and apparatus for reducing detected radiation scatter in radiography. The process comprises interposing synchronized rotating radiation shields between the object being radiographed and the detector and desirably between the radiation source and the object. Openings in the shields are aligned in such a way as to permit primary radiation to pass to the detector while stopping most radiation scatter. The apparatus comprises the shields with openings, means for mounting the shields and means for rotating the shields at appropriate speeds.

Abstract: A hand-held shielding device for holding and viewing a container of radioactive material is provided. The device comprises an elongated holding portion for the container formed with a longitudinal aperture therein and a shielding portion overlapping the aperture for shielding against direct radiation through the aperture. Indirect optical imaging is provided on the shielding portion for viewing the container and material therein at a viewing position away from direct radiations emanating through the aperture.