Automatic dose adaptation as a function of patient body mass index in CT calcium scoring
US7894570B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 16, 2004 |
| Grant date | Feb 22, 2011 |
| Priority date | — |
| Expiry date | Jun 16, 2028 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B6/544
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A weight (22) and height (24) of a patient who is to undergo a calcium screening examination in an x-ray diagnostic scanner (10) is used to calculate an appropriate x-ray dose in terms of tube current (mAs) for the calcium screening examination in accordance with the formula: mAs=c(BMI)2, where BMI is a patient's body mass index defined as: BMI=patent weight_(patient height)2.and C is a constant selected in accordance with a target required noise. In this manner, patients can be scanned with a minimum dose necessary to achieve the target noise, e.g., 20 HU. The images can be compared with earlier (and subsequent) images that have the same target noise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.