Cbct to mr registration via occluded shape reconstruction and robust point matching

A space registration, medical image technology, applied in the direction of detailed information related to the graphical user interface, image analysis, image enhancement, etc., can solve the problem that the surgeon is not provided with help

Pending Publication Date: 2019-07-30
KONINKLJIJKE PHILIPS NV +1
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Problems solved by technology

In particular, the surgeon was not assisted in merging the complex three-dimensional (3D) information provided by pre-interventional CE-MRI with the corresponding 3D information provided by intra-procedural CBCT

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  • Cbct to mr registration via occluded shape reconstruction and robust point matching
  • Cbct to mr registration via occluded shape reconstruction and robust point matching
  • Cbct to mr registration via occluded shape reconstruction and robust point matching

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Embodiment Construction

[0018] One way to provide intuitive merging of information embodied by cone-beam computed tomography (CBCT)-guided images and reference preoperative medical images (usually MRI images or MDCT images) would be to spatially map the CBCT images with the preoperative medical images. and then display them as fused images, for example with one image displayed on top of the other as a partially transparent overlay image.

[0019] However, in-procedure registration of CBCT images to baseline MRI or MDCT preoperative medical images is a challenging problem for several reasons. One difficulty is that the CBCT field of view (FOV) is typically cylindrical in shape, compared to the common rectangular FOV used for baseline MRI or MDCT preoperative medical images. Another difficulty is that in many cases the liver is completely invisible in the CBCT FOV. Furthermore, CBCT-guided images are often of low quality and prone to artifacts. These are factors such as incomplete imaging arcs (e.g.,...

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Abstract

In an image guidance method, a stream of cone-beam computed tomography (CBCT) images of an anatomical organ is acquired using a CBCT imaging device (34). For each CBCT image (44), the surface of the organ in the CBCT image is segmented to generate a segmented surface (70) of the anatomical organ in the CBCT image. Occluded shape reconstruction (66) using a statistical shape prior (68) may be usedto reconstruct a missing or occluded surface portion. A pre-operative medical image (12) of the anatomical organ and the CBCT image are spatially registered by warping one of the images to the other of the images using point set registration of a segmented surface (30) of the organ in the preoperative medical image and the segmented surface of the organ in the CBCT image. A fused image (82) is displayed that combines the warped image and the other image.

Description

technical field [0001] The following generally relates to the field of image-guided medical procedures, the field of medical imaging, the field of liver cancer management, and related fields. Background technique [0002] Liver cancer is one of the most common cancers. More than 800,000 new cases of hepatocellular carcinoma (HCC, primary liver cancer) and more than 300,000 cases of metastatic disease are diagnosed annually worldwide. Transcatheter arterial chemoembolization (TACE) is the mainstay of treatment in more than 70% of these patients. TACE is an x-ray image-guided interventional oncology procedure in which chemotherapy drugs are delivered locally from a catheter in the hepatic artery to the tumor itself. The procedure is usually guided by cone-beam computed tomography (CBCT) imaging using a contrast agent that is administered into the artery to most effectively image the arterial vasculature that is feeding the tumor. Two-dimensional (2D) fluoroscopy can also be...

Claims

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Application Information

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IPC IPC(8): G06T7/12G06T7/33G06T7/00G06T7/143
CPCG06T7/0014G06T7/0016G06T2207/10081G06T2207/10088G06T2207/10121G06T2207/20076G06T2207/20221G06T2207/30056G06T2207/30096G06T7/344G06T7/12G06T7/143G06T2207/20101G06T11/003G06T2200/24
Inventor J·特雷亚尔S·斯莫尔卡M·D·林J-F·格施温德J·邓肯
Owner KONINKLJIJKE PHILIPS NV
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