X-ray or gamma ray systems or devices – Specific application – Computerized tomography
Patent
1994-09-30
1996-10-29
Porta, David P.
X-ray or gamma ray systems or devices
Specific application
Computerized tomography
378901, 36441319, A61B 603
Patent
active
055704042
ABSTRACT:
A method for automatically editing a plurality of CT image slices to provide a three dimensional view of a selected object located within a patient's body comprises providing at least one slab of CT image slices produced by CT scanning system and computing a top MIP image of the slab. An undesirable object is automatically removed from the top MIP image by first detecting all the pixels having illuminating intensity values which represent the undesirable object. Then all the pixels of the object to be removed are set to a substantially zero illuminating intensity value in order to remove the object from the top MIP image of the slab. After the undesirable object is removed from the top MIP image, the edits made thereto are applied to each CT image slice in the slab. The present invention also includes apparatus for performing a 3D reconstruction of CT angiographic images to visualize a selected object located within a patient's body. The apparatus comprises an x-ray tube for projecting energy into a layer of interest in the patient's body and a detector for detecting changes in the projected energy as it exits the layer of interest. The changes detected in the projected energy are indicative of various objects including the selected object that are located within the layer of interest of the patient's body. Moreover, the x-ray tube and detector operate in conjunction to provide at least one slab of CT image slices.
REFERENCES:
patent: 4709385 (1987-11-01), Pfeiler et al.
patent: 5243664 (1993-09-01), Tuy
"Editing Tools for 3D Medical Imaging", Ney et al., IEEE Computer Graphics & Applications, Nov. 1991, pp. 63-71.
"An Image Editor for a 3D-CT Reconstruction System", Ezrielev et al, SPIE vol. 1233, Medical Imaging IV: Image Processing (1990), pp. 67-76.
Chiu Ming-Yee
Ezrielev Jay
Fisler Richard
Hentschel Dietmar
Liang Cheng-Chung
Ahmed Adel A.
Bruce David Vernon
Porta David P.
Siemens Corporate Research
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