公开(公告)号：WO2016148616A1

公开(公告)日：2016-09-22

申请号：PCT/SE2015/050316

申请日：2015-03-18

Applicant: PRISMATIC SENSORS AB

Inventor： GRÖNBERG, Fredrik ,  PERSSON, Mats ,  BORNEFALK, Hans

IPC: G06T11/00 ,  G01N23/04 ,  G01N23/087 ,  A61B6/03

CPC classification number: G06T11/003 ,  A61B6/032 ,  A61B6/4241 ,  A61B6/463 ,  A61B6/482 ,  A61B6/5205 ,  A61B6/5241 ,  G01N23/046 ,  G06T11/005 ,  G06T2210/41 ,  G06T2211/408

Abstract: There is provided a method of image reconstruction based on energy-resolved image data from a photon-counting multi-bin detector or an intermediate storage. The method comprises processing (S1 ) the energy-resolved image data by performing at least two separate basis decompositions using different number of basis functions for modeling linear attenuation, wherein a first basis decomposition is performed using a first smaller set of basis functions to obtain at least one first basis image representation, and wherein a second basis decomposition is performed using a second larger set of basis functions to obtain at least one second basis image representation. The method also comprises reconstructing a first image based on said at least one first basis image representation obtained from the first basis decomposition, and combining the first image with information representative of said at least one second basis image representation.

Abstract translation: 提供了一种基于来自光子计数多仓检测器或中间存储器的能量分辨图像数据的图像重建方法。 该方法包括通过使用不同数量的用于建模线性衰减的基函数来执行至少两个单独的基本分解来处理（S1）能量分辨图像数据，其中使用第一较小的一组基函数来执行第一基分解以获得 至少一个第一基图像表示，并且其中使用第二较大的一组基函数来执行第二基分解以获得至少一个第二基图像表示。 该方法还包括基于从第一基础分解获得的所述至少一个第一基本图像表示重建第一图像，以及将第一图像与表示所述至少一个第二基本图像表示的信息进行组合。

公开(公告)号：WO2015156711A1

公开(公告)日：2015-10-15

申请号：PCT/SE2014/050428

申请日：2014-04-07

Applicant: PRISMATIC SENSORS AB

Inventor： PERSSON, Mats

IPC: G06T11/00 ,  G01N23/04 ,  G01N23/087 ,  A61B6/03

CPC classification number: G01N23/046 ,  A61B6/03 ,  A61B6/032 ,  A61B6/482 ,  A61B6/52 ,  A61B6/5205 ,  A61B6/5258 ,  G01N23/04 ,  G01N23/087 ,  G06T7/0012 ,  G06T11/005 ,  G06T2207/10081 ,  G06T2207/30004 ,  G06T2211/408

Abstract: There is provided a method for processing a radiographic image acquired with at least two energy levels. A first step (S1 ) involves providing energy-resolved image data representative of the radiographic image with at least two energy levels, e.g. from a detector or from an intermediate storage. A second step (S2) involves decomposing the provided image data into at least one basis image representation, based on a model where a combination of at least two basis functions is used to express a representation of at least one linear attenuation coefficient, and where at least one basis function models a physical material and at least one other basis function models the Non-Linear Partial Volume, NLPV, effect.

Abstract translation: 提供了一种用于处理以至少两个能级获取的放射照相图像的方法。 第一步骤（S1）涉及提供表示具有至少两个能级的放射照相图像的能量分辨图像数据，例如。 来自检测器或来自中间储存器。 第二步骤（S2）包括基于模型将所提供的图像数据分解为至少一个基本图像表示，其中使用至少两个基本函数的组合来表示至少一个线性衰减系数的表示，并且其中在 至少一个基础函数模拟物理材料，并且至少一个其他基函数模拟非线性部分体积NLPV效应。

公开(公告)号：WO2022039643A1

公开(公告)日：2022-02-24

申请号：PCT/SE2021/050685

申请日：2021-07-06

Applicant: PRISMATIC SENSORS AB

Inventor： EGUIZAVAL, Alma ,  GRÖNBERG, Fredrik ,  PERSSON, Mats

IPC: G06T11/00 ,  A61B6/03 ,  G01N23/04 ,  G01N23/06 ,  G01T1/16 ,  G06T1/00 ,  G06T9/00

Abstract: There is provided a method and corresponding system for image reconstruction based on energy-resolved x-ray data. The method comprises collecting (S1) at least one representation of energy-resolved x-ray data, and performing (S2) at least two basis material decompositions based on said at least one representation of energy-resolved x-ray data to generate at least two original basis image representation sets. The method further comprises obtaining or selecting (S3) at least two basis image representations from at least two of said original basis image representation sets, and processing (S4) said obtained or selected basis image representations by data processing based on machine learning to generate at least one representation of output image data.

公开(公告)号：WO2022037763A1

公开(公告)日：2022-02-24

申请号：PCT/EP2020/073116

申请日：2020-08-18

Applicant: PRISMATIC SENSORS AB

Inventor： SUNDBERG, Christel ,  BERGENTOFT, Filip ,  PERSSON, Mats ,  DANIELSSON, Mats

IPC: G01T1/172 ,  G01T1/24 ,  G01T1/29 ,  G01V5/00

Abstract: There is provided an x-ray detector system (5) comprising a photon-counting x-ray detector (20) for detecting x-ray radiation from an x-ray source, and a coincidence detection system (60) configured to determine and/or obtain information about the radiation incident on the x-ray detector based on information about the time of photon interactions in said x-ray detector and information about the location of the x-ray source in relation to the x-ray detector. There is also provide an x-ray imaging system comprising such an x-ray detector system, as well as a corresponding coincidence detection system and a corresponding method.

公开(公告)号：WO2018217150A1

公开(公告)日：2018-11-29

申请号：PCT/SE2018/050474

申请日：2018-05-08

Applicant: PRISMATIC SENSORS AB

Inventor： PERSSON, Mats

IPC: G06T11/00 ,  G01N23/04 ,  G01N23/087 ,  A61B6/03

Abstract: Disclosed is a method for reconstructing image data from x-ray data measured with an imaging system comprising at least one photon-counting detector. The method comprises the step of obtaining a representation of data measured by said photon-counting detector. The method also comprises the step of generating first image data based on a projection based first functional using a first algorithm, said projection based first functional being dependent on said representation of data. The method also comprises the step of updating, based on a second functional that includes a model of at least one physical effect not included in said projection based first functional, said first image data to obtain second image data. The disclosure also provides an image processing device configured to reconstruct image data from x-ray data measured with an imaging system comprising at least one photon-counting detector as well as a corresponding computer program.

公开(公告)号：WO2018186785A1

公开(公告)日：2018-10-11

申请号：PCT/SE2018/050321

申请日：2018-03-26

Applicant: PRISMATIC SENSORS AB

Inventor： PERSSON, Mats ,  DANIELSSON, Mats ,  XU, Cheng

IPC: G01T1/24 ,  A61B6/03 ,  G01N23/04 ,  G01N23/083 ,  G01T1/36

Abstract: There is provided a photon-counting x-ray detector system (200) comprising a plurality of photon-counting channels (220), and at least one anti-coincidence circuit (230), each of which is connected to least two of the channels and configured to detect coincident events in the connected channels. The x-ray detector system (200) further comprises an anti-coincidence controller (240) configured to control the operation of said at least one anti-coincidence circuit based on photon count information by gradually adapting the operation of said at least one anti-coincidence circuit with increasing count rates, starting from a threshold count rate.

公开(公告)号：WO2018030929A1

公开(公告)日：2018-02-15

申请号：PCT/SE2017/050497

申请日：2017-05-15

Applicant: PRISMATIC SENSORS AB

Inventor： DANIELSSON, Mats ,  PERSSON, Mats ,  SJÖLIN, Martin

IPC: G01T1/24 ,  G01N23/04

Abstract: There is provided an x-ray detector comprising a number of adjacent detector modules arranged in a configuration having central parts and peripheral parts. The x-ray detector is configured to have higher dose efficiency in the central parts and lower dose efficiency in the peripheral parts.

Abstract translation: 提供了一种X射线探测器，其包括以具有中央部分和周边部分的配置布置的多个相邻探测器模块。 X射线探测器被配置为在中心部分具有较高的剂量效率，并且在周边部分具有较低的剂量效率。

公开(公告)号：WO2018030928A1

公开(公告)日：2018-02-15

申请号：PCT/SE2017/050496

申请日：2017-05-15

Applicant: PRISMATIC SENSORS AB

Inventor： SJÖLIN, Martin ,  PERSSON, Mats

IPC: A61B6/00 ,  G01T1/29 ,  G06T11/00

Abstract: There is provided a method and corresponding system for data acquisition, for Computed Tomography, CT, based on an x-ray imaging system (10) having a detector (12) with a plurality of pixels (13), wherein data sampling is performed with a temporal offset between measurements acquired by adjacent pixels of the detector.

Abstract translation: 提供了一种基于X射线成像系统（10）的用于计算机断层扫描CT的数据采集的方法和相应系统，所述X射线成像系统（10）具有带多个像素（13）的检测器（12） ），其中数据采样是利用由检测器的相邻像素获取的测量之间的时间偏移来执行的。