摘要:
The invention relates to a scanned-slot x-ray imaging system, having a first collimator and a second collimator arranged in a first distance (a) and a second distance (b), respectively, from a radiation source and each provided with a slot and a detector located under the second collimator slot, said slot of said second collimator being wider than the said slot of said first collimator and said detector under the second slot is wider than the first collimator slot and the second collimator slot. The slot of said second collimator has a width (y′) not less than a safety margin and the product of the width (x) of the slot of said first collimator and said second distance (b) divided with the said first distance (a) for allowing a misalignment with respect to a central symmetry line of said slots.
摘要:
An imaging system is based on in-line x-ray optics arranged in combination with an X-ray detector to detect radiation from radio-labeled substances within an object to be imaged. This arrangement will provide a nuclear imaging device with potentially orders of magnitude higher resolution and efficiency and it will moreover be relatively easy to align and to produce and assemble in large quantities.
摘要:
To enhance image acquisition and speed up the examination during x-ray examinations, the present invention relates to an X-ray apparatus for three dimensional imaging and in particular for tomosynthesis examination, comprising a means for obtaining a set of projection images of a body part, a reconstruction means for reconstructing a three-dimensional image volume, memory for storing the projection images, and a control means. The reconstruction arrangement is arranged to reconstruct a three-dimensional image volume from data in the projection images in the memory, the reconstruction arrangement being arranged to reconstruct a first and a second image volume, wherein the second image volume is reconstructed having lower resolution than the first image volume.
摘要:
A novel X-ray apparatus is provided for three-dimensional imaging and in particular for tomosynthesis examination, which includes an X-ray source having a focal spot, a collimator including a plurality of slits, a detector assembly including a plurality of line detectors corresponding to respective ones of the plurality of slits and an exposure volume arranged between the collimator and the detector assembly. The X-ray source, the collimator and the detector assembly are arranged in series, so that each line detector is aligned with the corresponding collimator slit and the focal spot, and is simultaneously displaceable by a scan motion relative to the exposure volume. The scan motion is primarily a rotation around a rotation axis arranged such that the detector assembly is situated essentially between the rotation axis and the X-ray source. Combined two and three-dimensional examination are also permitted according to the disclosed methods and apparatus.
摘要:
A shielding arrangement for an x-ray apparatus, preferably for mammography examination is disclosed, and comprises at least an x-ray source, a collimator arrangement and a detector assembly, whereby the collimator is arranged between the x-ray source and the detector assembly and through which x-rays pass. The shielding arrangement, at least partly made of x-ray blocking material and provided for blocking, scattering and/or reflecting x-rays is arranged, at least partly, in a space between the x-ray source and collimator.
摘要:
The present invention relates to an arrangement for adjusting a number of settings in an x-ray imaging apparatus (10) for recurrent mammography examinations, said apparatus comprising at least one x-ray source (11), a collimator arrangement (12) and compression pedals (13a, 13b) for positioning and compressing the breast (14) of a patient to be examined. The arrangement comprises: control units (16-19) for adjusting said number of settings of said x-ray imaging apparatus based on an identity of said person to be examined and data stored in a database (21), said data including a set of setting-data from at least one recent x-ray examination of said patient, a main control unit (15) communicating with a control unit (16) for adjusting characteristics of x-ray radiations from said x-ray source (11), a control unit (17) for adjusting the position of said x-ray source (11) and an identity input device (20). The arrangement further comprises a device (19) for adjusting collimator slots widths based on information retrieved from said database and/or a position of said pedals.
摘要:
An apparatus and method for focusing X-rays. In one embodiment, his invention is a commercial-grade compound refractive X-ray lens. The commercial-grade compound refractive X-ray lens includes a volume of low-Z material. The volume of low-Z material has a first surface which is adapted to receive X-rays of commercially-applicable power emitted from a commercial-grade X-ray source. The volume of low-Z material also has a second surface from which emerge the X-rays of commercially-applicable power which were received at the first surface. Additionally, the commercial-grade compound refractive X-ray lens includes a plurality of openings which are disposed between the first surface and the second surface. The plurality of openings are oriented such that the X-rays of commercially-applicable power which are received at the first surface, pass through the volume of low-Z material and through the plurality openings. In so doing, the X-rays which emerge from the second surface are refracted to a focal point.