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Apparatus for determining modification of size of object

一种对象、设备的技术，应用在图像数据处理、仪器、计算等方向，能够解决肺节结尺寸改变精确度降低等问题

Active Publication Date: 2011-07-20
KONINK PHILIPS ELECTRONICS NV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Mathematically speaking, this can be formulated as an ill-posed problem, since small changes in the input data, i.e. computed tomography image dataset values, can lead to large changes in the output data, i.e. segmented volumes, resulting in determined pulmonary nodule size changes the accuracy of

Method used

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  • Apparatus for determining modification of size of object
  • Apparatus for determining modification of size of object

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Embodiment Construction

[0054] figure 1 A device 17 for determining a size change of an object is shown schematically and exemplarily. In this embodiment, the device for determining the change in size of the object is a computed tomography system. The computed tomography system comprises a gantry 1 which is rotatable about an axis of rotation R extending parallel to the z-direction. A radiation source 2 is installed on the scanning frame 1, and in this embodiment, the radiation source is an X-ray tube. The radiation source 2 is equipped with a collimator 3 which, in this embodiment, forms a cone-shaped radiation beam 4 from the radiation generated by the radiation source 2 . The radiation penetrates the examination zone 5, which in this embodiment is cylindrical, which in this embodiment houses the patient or the technical components. After traversing the examination zone 5, the radiation beam 4 is incident on a detection device 6 comprising a two-dimensional detection surface. The detection devi...

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Abstract

The present invention relates to an apparatus for determining a modification of a size of an object. The apparatus comprises a registration unit (13) for registering with respect to each other a first region of interest in a first image data set showing an object at a first time and a second region of interest in a second image data set showing the object at a second time being different from the first time, wherein the registration unit is adapted to generate a scaling value by performing at least a scaling transformation for registering the first region of interest and the second region of interest with respect to each other. The apparatus further comprises a modification value determination unit (14) for determining a modification value, which indicates the modification of the size of the object, depending on the generated scaling value.

Description

technical field [0001] The invention relates to a device, a method and a computer program for determining a change in size of an object. Background technique [0002] Typically, pulmonary nodules in the first computed tomography image dataset and the subsequent computed tomography image dataset are selected manually or automatically, and the selected nodules are segmented independently in the two computed tomography image datasets. A volume of the segmented lung nodule in the first computed tomography image dataset and a volume of the segmented lung nodule in the subsequent computed tomography image dataset are determined and compared to determine whether the lung nodule has grown or shrunk. [0003] Since the segmentation is performed on each computed tomography image dataset separately, a volume number assigned to a pulmonary nodule results at each time point, even if the same lung nodule of the same size and shape is present in both computed tomography image datasets As ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00
CPCG06T2207/10081G06T2207/30064G06T2207/20104G06T3/0075G06T7/0038G06T7/0012G06T7/38G06T3/147
Inventor S·卡布斯R·维姆科
Owner KONINK PHILIPS ELECTRONICS NV
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