公开(公告)号：US10282870B2

公开(公告)日：2019-05-07

申请号：US15509065

申请日：2015-10-10

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Kevin Martin Brown ,  Reuven Levinson ,  Gilad Shechter ,  Mordechay Pinchas Freiman

IPC: G06K9/00 ,  G06T11/00 ,  G01N23/046

Abstract: A system includes memory (420) with instructions for at least one of processing spectral CT projection data to mitigate at least one of noise of the spectral CT projection data or a noise induced bias of the spectral CT projection data or generating a decomposition algorithm that mitigates the noise induced bias of the spectral CT projection data. The system further includes a processor (418) that executes the instructions and at least one of processes the spectral CT projection data or generates the decomposition algorithm and decomposes the spectral CT projection data to basis materials. The system further includes a reconstructor (434) that reconstructs the basis materials, thereby generating spectral images.

公开(公告)号：US11197654B2

公开(公告)日：2021-12-14

申请号：US16644646

申请日：2018-09-05

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Reuven Levinson ,  Mark Kenneth Limkeman

IPC: A61B6/00 ,  A61B6/03

Abstract: An imaging system (100) includes a radiation source (708) that emits radiation that traverses an examination region (706), a radiation detector array (716) with a plurality of detectors (1104N) that detect the radiation that traverses the examination region, a dynamic bowtie filter (718) between the radiation source and the examination region, a first motor (7221) and a second motor (7222), and a controller (724). The dynamic bowtie filter includes a first half wedge (7181) and a second half wedge (7182). The first motor is in mechanical communication with the first half wedge and moves the first half wedge and the second motor is in mechanical communication with the second half wedge and moves the second half wedge. The controller independently controls the first and second motors to move the first and second half wedges.

公开(公告)号：US09775572B2

公开(公告)日：2017-10-03

申请号：US14647568

申请日：2013-11-28

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Tsvi Katchalski ,  Ewald Roessl ,  Reuven Levinson

IPC: A61B6/00 ,  A61B6/03 ,  A61B6/06 ,  G21K1/02 ,  G21K1/10

CPC classification number: A61B6/4035 ,  A61B6/032 ,  A61B6/035 ,  A61B6/06 ,  G21K1/02 ,  G21K1/10

Abstract: An imaging system (500) includes a focal spot (510) that rotates along a path around an examination region (506) and emits radiation. A collimator (512) collimates the radiation, producing a radiation beam (516) that traverses a field of view (520) of the examination region and a subject or object therein. A detector array (522), located opposite the radiation source, across the examination region, detects radiation traversing the field of view and produces a signal indicative of the detected radiation. A beam shaper (524), located between the radiation source and the collimator, rotates in coordination with the focal spot and defines an intensity profile of the radiation beam. The beam shaper includes a plurality of elongate x-ray absorbing elements (606) arranged parallel to each other along a transverse direction with respect to a direction of the beam, separated from each other by a plurality of material free regions (604).