X-ray CT apparatus and method of calculating blood-flow information
US7145982B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 2, 2005 |
| Grant date | Dec 5, 2006 |
| Priority date | — |
| Expiry date | Sep 2, 2025 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B6/507
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An X-ray CT (computed tomography) apparatus is disclosed. The X-ray CT apparatus include an X-ray supply unit performing low-dose X-ray scanning and high-dose X-ray scanning for a patient in which a contrast medium has been injected. The collected X-ray projection data are reconstructed to generate image data for low-dose X-ray scanning and high-dose X-ray scanning. In the low-dose X-ray scanning that proceed the high-dose X-ray scanning, plural images are obtained in succession, in which ROIs (regions of interest) are set in given positions. A CT value calculating unit calculates the CT values in the ROIs in succession, and the timing at which the high-dose X-ray scanning is started is determined on the basis of the changes of CT values with time. And blood-flow information is calculated by using the image data obtained with low-dose X-ray scanning and high-dose X-ray scanning.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.