公开(公告)号：US20160140751A1

公开(公告)日：2016-05-19

申请号：US14929806

申请日：2015-11-02

Applicant: The Regents of the University of California

Inventor： Hamid Jafarkhani ,  Mahdi Hajiaghayi ,  Elliott Groves ,  Arash Kheradvar

IPC: G06T15/08 ,  G06T19/20 ,  A61B8/08 ,  G06T7/00 ,  A61B5/055 ,  A61B5/00

CPC classification number: G06T19/20 ,  A61B5/0044 ,  A61B5/055 ,  A61B8/0883 ,  A61B8/466 ,  A61B8/483 ,  A61B8/5223 ,  A61B2576/02 ,  G06T7/12 ,  G06T7/149 ,  G06T2207/10088 ,  G06T2207/10132 ,  G06T2207/20116 ,  G06T2207/30048 ,  G06T2219/2021

Abstract: The disclosure relates to a method of automatically producing a three-dimensional (3D) segmentation of a heart chamber, the method comprising: obtaining data sets from cardiac magnetic resonance imaging (MRI) or ultrasound, generating a 3D segmentation of the heart chamber from the data sets using an active contour method, modifying the 3D segmentation by adding a plurality of intra-chamber structures; and identifying an enclosing myocardium using the 3D segmentation generated by the method.

Abstract translation: 本公开涉及一种自动产生心室的三维（3D）分割的方法，所述方法包括：从心脏磁共振成像（MRI）或超声波获取数据集，从所述心室的三维分割生成心室的3D分割 使用主动轮廓方法的数据集，通过添加多个室内结构来修改3D分割; 并使用由该方法生成的3D分割来识别包围的心肌。

公开(公告)号：US20150303949A1

公开(公告)日：2015-10-22

申请号：US14689870

申请日：2015-04-17

Applicant: The Regents of the University of California

Inventor： Hamid Jafarkhani ,  Mahdi Hajiaghayi

IPC: H03M13/00 ,  H04L29/08

CPC classification number: H03M13/617 ,  G06F11/1076 ,  G06F11/1092 ,  G06F11/3447 ,  H03M13/036 ,  H03M13/13 ,  H03M13/373 ,  H03M13/616

Abstract: An apparatus or method for minimizing the total accessing cost, such as minimizing repair bandwidth, delay or the number of hops including the steps of minimizing the number of nodes to be engaged for the recovery process using a polynomial-time solution that determines the optimal number of participating nodes and the optimal set of nodes to be engaged for recovering lost data, where in a distributed database storage system, for example a dynamic system, where the accessing cost or even the number of available nodes are subject to change results in different values for the optimal number of participating nodes. An MDS code is included which can be reused when the number of participating nodes varies without having to change the entire code structure and the content of the nodes.

Abstract translation: 一种用于最小化总访问成本的装置或方法，例如最小化修复带宽，延迟或跳数，包括使用确定最佳数量的多项式时间解来最小化要用于恢复过程的节点的数量的步骤 的参与节点和用于恢复丢失数据的最佳节点集合，其中在分布式数据库存储系统中，例如动态系统，其中访问成本或甚至可用节点的数量可能变化导致不同的值 为参与节点的最佳数量。 包括MDS代码，当参与节点的数量变化时，可以重新使用MDS代码，而不必更改整个代码结构和节点的内容。

公开(公告)号：US11651487B2

公开(公告)日：2023-05-16

申请号：US16926517

申请日：2020-07-10

Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA

Inventor： Arghavan Arafati ,  Hamid Jafarkhani ,  Arash Kheradvar

IPC: G06T7/00 ,  G06N3/04 ,  G06N3/08 ,  G06T7/174 ,  G16H30/40 ,  G06N3/088 ,  G06N3/084

CPC classification number: G06T7/0012 ,  G06N3/0454 ,  G06N3/088 ,  G06T7/174 ,  G06N3/084 ,  G06T2207/10132 ,  G06T2207/20084 ,  G06T2207/30048 ,  G16H30/40

Abstract: Devices, systems and methods related to techniques for performing four-chamber segmentation of echocardiograms are disclosed. In one example aspect, a method for generating segmented image data based on an input echocardiogram includes receiving an input echocardiogram that includes information associated with four chambers of a heart, performing segmentation on the information associated with the four chambers using an adversarial model that comprises a first artificial neural network with multiple layers, and combining data from selected layers of the first artificial neural network to generate an output image that includes the segmented four chambers of the heart.

公开(公告)号：US10116372B2

公开(公告)日：2018-10-30

申请号：US15604102

申请日：2017-05-24

Applicant: The Regents of the University of California

Inventor： Hamid Jafarkhani ,  Erdem Koyuncu

IPC: H04B7/02 ,  H04B7/06 ,  H04B7/0417

Abstract: A method includes the step of interleaving training and feedback stages in a transmitter and a multiplicity of antennas, wherein the transmitter trains the corresponding ones of the multiplicity of antennas one by one and receives feedback information after training each one of the corresponding ones of the multiplicity of antennas. An apparatus operating using the method includes a multiple-input single-output system with t transmitter antennas, a short-term power constraint P, and target data rate ρ where for any t, the same outage probability as a system with perfect transmitter and receiver channel state information is achieved with a feedback rate of R1 bits per channel state and via training R2 transmitter antennas on average, where R1 and R2 are independent of t, and depend only on ρ and P.