Medical image processor
First Claim
Patent Images
1. An image processor comprising:
- an image input circuit including an analog-to-digital converter for converting a provided gray-level image into a quantized image signal, and an image memory for successively storing an image on the basis of the quantized image signal from the analog-to-digital converter;
an image processing circuit including,a ternary circuit for producing a ternary code signal based on the quantized signals outputted from the image memory in said image input circuit on the basis of a gray-level histogram,a boundary extraction means for extracting a boundary of a measured part within the image to be processed on the basis of the ternary code signal from said ternary circuit and for producing a corresponding boundary signal,a volume calculation means for integrating the boundary signal from said boundary extraction means and the value of gray-level within said boundary to produce a volume signal corresponding to the volume of the measured part, anda centroid operation means for obtaining the centroid of the measured part on the basis of the volume signal from said boundary extraction means and for producing a corresponding centroid signal; and
an output circuit including a plane memory for storing at least selected of the signals produced by said image processing circuit and a display device for displaying images corresponding to at least selected of the signals stored in said plane memory.
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Abstract
An image processor which can accurately and promptly obtain information about a ventricle of a living body, such as the boundary diagram, the volume, the centroid movement view and a three-dimensional view. An X-ray projection of a part to be diagnosed is quantized. The boundary and centroid of the part are obtained from the optimal ternary data using the variance of the gray-level of the image and the separation degree of a histogram. The volume and three-dimensional view of the part are obtained from this data using the gray-level method.
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Citations
12 Claims
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1. An image processor comprising:
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an image input circuit including an analog-to-digital converter for converting a provided gray-level image into a quantized image signal, and an image memory for successively storing an image on the basis of the quantized image signal from the analog-to-digital converter; an image processing circuit including, a ternary circuit for producing a ternary code signal based on the quantized signals outputted from the image memory in said image input circuit on the basis of a gray-level histogram, a boundary extraction means for extracting a boundary of a measured part within the image to be processed on the basis of the ternary code signal from said ternary circuit and for producing a corresponding boundary signal, a volume calculation means for integrating the boundary signal from said boundary extraction means and the value of gray-level within said boundary to produce a volume signal corresponding to the volume of the measured part, and a centroid operation means for obtaining the centroid of the measured part on the basis of the volume signal from said boundary extraction means and for producing a corresponding centroid signal; and an output circuit including a plane memory for storing at least selected of the signals produced by said image processing circuit and a display device for displaying images corresponding to at least selected of the signals stored in said plane memory. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification