Method for measuring nuclear magnetic resonance longitudinal axis relaxation time of blood and apparatus using the same
US7295006B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 21, 2006 |
| Grant date | Nov 13, 2007 |
| Priority date | — |
| Expiry date | May 12, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/50
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Disclosed are a method and apparatus for accurately measuring nuclear magnetic resonance (NMR) longitudinal axis relaxation time by minimizing the influence of the amount of blood. The method includes applying a first magnetic field MO to a living body portion into which the blood flows magnetizing the blood in a first direction; applying a second magnetic field MZ to at least a portion of the living body portion, to which the first magnetic field MO is applied, magnetizing at least a portion of the blood in a second direction vertical to the first direction;; blocking MZ detecting a signal that is induced as magnetization is returned from the second direction to the first direction; detecting the amount of blood to which the second magnetic field MZ is applied; and calculating the longitudinal axis relaxation time T1 of the blood based on the induced signal and based on the amount of blood.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.