Medical image processor
AssigneesAgency of Industrial Science and Technology, Ministry of International Trade & Industry
InventorsKazuo Toraichi, Nobuyuki Otsu, Motomu Suzuki
Life of this patent
Estimating the term…
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.
Claims12
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, 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.
Dependencies are inferred from the claim text.