公开(公告)号：EP2849630A2

公开(公告)日：2015-03-25

申请号：EP13727302.5

申请日：2013-05-10

申请人： CYDAR LIMITED

发明人： CARRELL, Tom ,  VARNAVAS, Andreas ,  PENNEY, Graeme

IPC分类号： A61B5/00 ,  G06T7/00

CPC分类号： G06T7/0075 ,  F24C15/2021 ,  G06T7/593 ,  G06T2207/10121 ,  G06T2207/30012

摘要： Embodiments of the invention introduce the concept of a virtual fiducial marker (VFM). This marker will not be placed prior to preoperative imaging. It will therefore not initially appear in the preoperative 3D image. Instead, the marker will be virtually placed in the 3D data set prior to surgery, and as such the marker does not even need to be attached to the patient, if the patient is not expected to move during surgery. The idea behind such a VFM comes from the observation that there is a big variation in the difficulty of an image based registration depending on the quality of the images and their field of view. However, provided two initial registrations to high quality wide field of view images can be carried out, it then becomes possible to use these registrations to insert a virtual fiducial marker within the 3D preoperative image. Once inserted it may then be used to obtain a starting position for a registration procedure, and particularly to obtain in-plane translations. It may also be used at the end of a registration to provide a measure of registration accuracy, to verify the registration and detect mis-registrations.

摘要翻译： 本发明的实施例引入虚拟基准标记（VFM）的概念。 该标记不会在术前成像前放置。 因此，它最初不会出现在术前3D图像中。 相反，在手术之前，标记将被虚拟地放置在3D数据集中，并且因此如果患者在手术期间不期望移动，则标记甚至不需要附着到患者​​身上。 这种VFM背后的想法来自于观察到，基于图像的质量和它们的视野，基于图像的注册的难度有很大变化。 然而，如果能够对高质量的宽视野图像进行两次初始注册，则可以使用这些注册在3D术前图像中插入虚拟基准标记。 一旦插入，它可以用于获得注册过程的起始位置，特别是获得平面内翻译。 它也可以在注册结束时使用，以提供注册准确度的度量，以验证注册和检测错误注册。

公开(公告)号：EP2823463B1

公开(公告)日：2019-05-22

申请号：EP13709509.7

申请日：2013-03-01

申请人： Cydar Limited

发明人： CARRELL, Tom ,  VARNAVAS, Andreas ,  PENNEY, Graeme

IPC分类号： G06T7/00

公开(公告)号：EP2849630B1

公开(公告)日：2018-07-25

申请号：EP13727302.5

申请日：2013-05-10

申请人： CYDAR LIMITED

发明人： CARRELL, Tom ,  VARNAVAS, Andreas ,  PENNEY, Graeme

IPC分类号： G06T7/593

CPC分类号： G06T7/593 ,  F24C15/2021 ,  G06T2207/10121 ,  G06T2207/30012

摘要： Embodiments of the invention introduce the concept of a virtual fiducial marker (VFM). This marker will not be placed prior to preoperative imaging. It will therefore not initially appear in the preoperative 3D image. Instead, the marker will be virtually placed in the 3D data set prior to surgery, and as such the marker does not even need to be attached to the patient, if the patient is not expected to move during surgery. The idea behind such a VFM comes from the observation that there is a big variation in the difficulty of an image based registration depending on the quality of the images and their field of view. However, provided two initial registrations to high quality wide field of view images can be carried out, it then becomes possible to use these registrations to insert a virtual fiducial marker within the 3D preoperative image. Once inserted it may then be used to obtain a starting position for a registration procedure, and particularly to obtain in-plane translations. It may also be used at the end of a registration to provide a measure of registration accuracy, to verify the registration and detect mis-registrations.