公开(公告)号：US20160327622A1

公开(公告)日：2016-11-10

申请号：US14847643

申请日：2015-09-08

Applicant: General Electric Company

Inventor： Sangtae Ahn ,  Ravindra Mohan Manjeshwar ,  Florian Wiesinger ,  Lishui Cheng

IPC: G01R33/48 ,  A61B5/00 ,  A61B5/055 ,  G01T1/164 ,  G01T1/29

CPC classification number: G01R33/481 ,  A61B5/0035 ,  A61B5/055 ,  G01T1/1642 ,  G01T1/2985 ,  G01T1/2992 ,  G06T11/006 ,  G06T2211/424

Abstract: According to some embodiments, emission projection data and second source scan data are received. A prior map and a prior weight map are generated from second source scan data. A penalty function calculates voxel-wise differences between the prior map and a given image, transforms the voxel-wise differences and calculates a weighted sum of the transformed differences, using weights based on the prior weight map. Joint reconstruction of an emission image and an attenuation map proceeds iteratively and uses the penalty function.

Abstract translation: 根据一些实施例，接收发射投影数据和第二源扫描数据。 从第二源扫描数据生成先验地图和先验权重图。 惩罚函数计算先前地图和给定图像之间的体元差异，转换体元差异，并使用基于先前权重图的权重来计算变换差值的加权和。 发射图像和衰减图的联合重建进行迭代，并使用惩罚函数。

公开(公告)号：US20180197317A1

公开(公告)日：2018-07-12

申请号：US15400763

申请日：2017-01-06

Applicant: General Electric Company

Inventor： Lishui Cheng ,  Bruno Kristiaan Bernard De Man ,  Sheshadri Thiruvenkadam ,  Sangtae Ahn ,  Lin Fu ,  Hao Lai

IPC: G06T11/00 ,  G06T7/00 ,  G06N3/08

CPC classification number: G06N3/08 ,  G06N3/0454 ,  G06T11/006 ,  G06T2211/421 ,  G06T2211/424

Abstract: The present discussion relates to the use of deep learning techniques to accelerate iterative reconstruction of images, such as CT, PET, and MR images. The present approach utilizes deep learning techniques so as to provide a better initialization to one or more steps of the numerical iterative reconstruction algorithm by learning a trajectory of convergence from estimates at different convergence status so that it can reach the maximum or minimum of a cost function faster.

公开(公告)号：US09706972B1

公开(公告)日：2017-07-18

申请号：US15278652

申请日：2016-09-28

Applicant: General Electric Company

Inventor： Sangtae Ahn ,  Lishui Cheng ,  Florian Wiesinger ,  Dirk Bequé ,  Sandeep Suryanarayana Kaushik ,  Dattesh Dayanand Shanbhag

IPC: G01T1/164 ,  A61B6/00 ,  G01T1/29 ,  G01T1/17 ,  A61B6/03 ,  A61B6/02 ,  G06T7/00 ,  G06T3/40 ,  G06T11/00

CPC classification number: A61B6/5235 ,  A61B6/025 ,  A61B6/032 ,  A61B6/037 ,  A61B6/4085 ,  A61B6/461 ,  A61B6/502 ,  A61B6/5205 ,  G01T1/1647 ,  G01T1/17 ,  G06T11/006 ,  G06T2211/424 ,  G06T2211/432

Abstract: Aspects of the invention relate to generating an emission activity image as well as an emission attenuation map using an iterative updation based on both the raw emission projection data and the raw radiography projection data, and an optimization function. The outputs include an optimized emission activity image, and at least one of an optimized emission attenuation map or an optimized radiography image. In some aspects an attenuated corrected emission activity image is obtained using the optimized emission activity image, and the optimized emission attenuation map.