US 8,787,647 B2 · Image matching device and patient positioning device using the same

Abstract

An image matching device in which, in automatic positioning calculation using an ICP method, a solution is converged to an optimal solution while avoiding reaching a local solution, and a patient positioning device using this matching device. The device includes a CT image data reading unit reading first and second CT image data, a point group data generation unit generating first and second point group data in a three-dimensional space by binarization processing and edge-extraction processing on sliced images of the first and second CT image data, respectively, a point group data resolution conversion unit thinning-out point group data so as to extend a point-group-data array pitch, and an ICP calculation unit obtaining, using an ICP method, a conversion amount for the second point group data so that an error function of the first point group data and the second point group data outputted from the point group data resolution conversion unit is minimized.

Claims10

Dependent claims

An image matching device comprising:

a CT image data reading unit for reading first CT image data and second CT image data;
a point group data generation unit for generating first point group data and second point group data in a three-dimensional space from sliced images of the first CT image data and the second CT image data, respectively;
a point group data resolution conversion unit for thinning-out at least one of the first point group data and the second point group data so as to extend a point-group-data array pitch;
and
an ICP (iterative closest point) calculation unit for obtaining, using an ICP method, a conversion amount for the second point group data so that an error function of the first point group data and the second point group data outputted from the point group data resolution conversion unit is minimized.

2 more elements

A patient positioning device comprising:

an image matching device including:
a CT image data reading unit for reading first CT image data and second CT image data;
a point group data generation unit for generating first point group data and second point group data in a three-dimensional space from sliced images of the first CT image data and the second CT image data, respectively;
a point group data resolution conversion unit for thinning-out at:
Least one of the first point group data and the second point group data so as to extend a point-group-data array pitch;
and
an ICP (iterative closest point) calculation unit for obtaining, using an ICP method, a conversion amount for the second point group data so that an error function of the first point group data and the second point group data outputted from the point group data resolution conversion unit is minimized;
and
a treatment table control parameter calculation unit for calculating parameters for controlling driving axes of a treatment table according to the conversion amount obtained by the ICP calculation unit.

6 more elements

Dependencies are inferred from the claim text.

Image matching device and patient positioning device using the same

Life of this patent

Image matching device and patient positioning device using the same

Life of this patent

Abstract

Claims10