FT_QUALITYCHECK facilitates quality inspection of a dataset.

1) The data is analyzed, quantified, and stored in a .mat file in a timelock- and freq- like fashion. This allows inspection by existing FT functions.

2) The quantifications are visualized and exported to a .PNG and .PDF file (see link below). The visualizations are done for one-hour segments and contains general recording information (top left), jump detections (bottom left), time courses of the headpositions, raw signal, LineFreq noise (~50 hz), and LowFreq noise (0 - 2 Hz) in top right. Furthermore; the average powerspectrum (bottom middle) and the triggers detected where 'values' represents the number of unique triggers detected (i.e. same value, bottom right).

20110321_1203.pdf - the timecourses display averages over 10-second segments

Simply call ft_qualitycheck(cfg) with cfg.dataset pointing to the file location, for example;

 cfg.dataset = 'dataset.ds'
 ft_qualitycheck(cfg)
 

One can also inspect previously analyzed data without running the analysis again;

 cfg.matfile = '/home/common/meg_quality/dataset.mat'
 cfg.analyze = 'no'
 ft_qualitycheck(cfg)
 

On Odin (Donders Centre for Cognitive Neuroimaging), the MEG data recorded with the CTF system is analyzed and visualized automatically with a 'cronjob' at night. The resulting .png and .pdfs are stored in /home/common/meg_quality. Here, the output matfile is stored temporarily.