| 摘要 |
In a method and magnetic resonance tomography apparatus for spatially resolved presentation of a change of functional activities in the brain of a living subject by means of magnetic resonance, temporally successive magnetic resonance images of the brain of the subject stimulated with a stimulus are produced upon variation of at least one of the excitation angle and the echo time, a noise part for each pixel is calculated referenced to identical pixels of the temporally successive images, the noise part of each pixel is resolved into a first noise component independent of the excitation angle and a second noise component dependent on the excitation angle, the second noise component of the noise part of each pixel is resolved into a third noise component independent of the echo time and a fourth noise component dependent on the echo time, and the fourth noise component of the noise part of each pixel obtained in this way is employed for detecting neural activity changes in the brain of the living subject under observation.
|
