Modulation of x-ray tube current during CT scanning with modulation limit
US5450462A · kind A · utility
50Cited by
3References
6Claims
0Family size
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Key dates
| Filing date | Sep 6, 1994 |
| Grant date | Sep 12, 1995 |
| Priority date | — |
| Expiry date | Sep 6, 2014 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B6/027
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An x-ray CT system modulates x-ray tube current as a function of gantry angle to reduce the total patient dose without significantly increasing image noise. A scout scan is performed to acquire attenuation data which enables an optimal current modulation profile to be calculated for each slice in the scan. The modulation profile is clipped when the modulation limit of the x-ray generator is reached.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.