公开(公告)号：US06341179B1

公开(公告)日：2002-01-22

申请号：US09180751

申请日：1998-11-17

Applicant: Peter N R Stoyle ,  Derek L G Hill ,  David Atkinson

Inventor： Peter N R Stoyle ,  Derek L G Hill ,  David Atkinson

IPC: G06T1100

CPC classification number: G06T11/008 ,  G06T2211/412 ,  G06T2211/424

Abstract: The invention relates to a method and apparatus for reducing imaging artifacts in physiological images, such as magnetic resonance imaging images. A model of a physical cause for the image artifact is modelled and the effects of perturbing this model on a focus criterion of the image analyzed so as to optimize the focus criterion. For an optimized focus criterion, the model should reflect the actual physical cause of the image artifact. A focus criterion is a measure of entropy of the image, with an optimized image having reduced entropy.

Abstract translation: 本发明涉及用于减少诸如磁共振成像图像的生理图像中的成像伪影的方法和装置。 对图像伪影的物理原因模型进行建模，并对该模型进行扰动，对所分析图像的焦点标准进行优化，从而优化焦点准则。 对于优化的焦点准则，模型应该反映图像伪影的实际物理原因。 焦点标准是图像熵的度量，优化的图像具有降低的熵。

公开(公告)号：US5793448A

公开(公告)日：1998-08-11

申请号：US507485

申请日：1995-09-26

Applicant: George David Atkinson ,  James Francis Nangle

Inventor： George David Atkinson ,  James Francis Nangle

IPC: H04N5/645 ,  H04N5/64 ,  H01J23/34 ,  H01J29/50

CPC classification number: H04N5/645

Abstract: A cathode ray tube package includes a cathode ray tube assembly and a housing assembly including a deflection coil and/or at least one focus coil. The cathode ray tube assembly includes a collar (31) aligned with the electron beam, being arranged to mate with a mounting collar (41) carried on the housing assembly. The provision of the collar (31) enables the cathode ray tube assembly to be easily replaced at the end of the cathode ray tube's life within the housing assembly without the need for realignment of the coils.

Abstract translation: PCT No.PCT / GB94 / 00186 Sec。 371日期：1995年9月26日 102（e）1995年9月26日PCT PCT 1994年1月31日PCT公布。 WO94 / 19904 PCT公开号 日期1994年9月1日阴极射线管封装包括阴极射线管组件和包括偏转线圈和/或至少一个聚焦线圈的外壳组件。 阴极射线管组件包括与电子束对准的颈圈（31），被布置成与承载在壳体组件上的安装套环（41）配合。 提供套环（31）使得阴极射线管组件能够在阴极射线管的寿命结束时在壳体组件内容易地更换，而不需要重新对准线圈。