<unk>  (SAM) is a method for analysis of data obtained from magnetoencephalography (MEG) and electroencephalography (EEG). SAM is a nonlinear beamforming approach which can be thought of as a spatial filter.
Synthetic-aperture magnetometry
Doppler ultrasonography
Transcranial pulsed ultrasound
Functional near-infrared spectroscopy
Intravascular fluorescence
Tissue Doppler echocardiography
Biotelemetry
Perfusion scanning