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getting_started:ctf [2018/10/21 15:05]
42.49.180.224 [Getting started with CTF data]
getting_started:ctf [2017/08/17 11:21] (current)
127.0.0.1 external edit
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 ====== Getting started with CTF data ====== ====== Getting started with CTF data ======
-====== Getting started with CTF data ======+===== Introduction ​===== 
 +\\ 
 +The following data files can be read and used in FieldTrip: *.meg4, *.res4, *.mri, *.hdm, ClassFile.cls,​ MarkerFile.mrk. All required CTF reading functions are supplied with the FieldTrip toolbox. 
 + 
 +Initially, reading functions for CTF files were implemented from scratch by the FieldTrip developers. However, in 2008 we switched to the reading functions that are provided (but not officially maintained) by CTF. The new CTF reading functions are located in  the external/​ctf directory and will be automatically called by the appropriate FieldTrip functions. 
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 +These low-level functions are written by Dr. Harold Wilson and courtesy of MISL. These are not used for clinical studies and the user assumes all risk with their use. Although the functions originate from MISL, these are included in in FieldTrip under the explicit agreement that MISL does not support these functions. If you find bugs or have suggestions for improvements,​ please contact the FieldTrip developers and not MISL. 
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 +An alternative ("​old"​) implementation for reading the CTF data is available in the read_ctf_xxx functions, which can be used by specifying '​ctf_old'​ as headerformat and dataformat.  
 + 
 +The following types of CTF data can be read and used in FieldTrip:  
 + 
 +  * MEG/EEG and AUX data: *.res4, *.meg4, *.1_meg4, *.2_meg4, etc. 
 +  * event information:​ *.meg4, ClassFile.cls,​ MarkerFile.mrk 
 +  * single sphere and multi-sphere volume conduction models: *.hdm 
 +  * anatomical MRI: *.mri 
 + 
 + 
 +This page explains how to get started reading and using each of these file types in FieldTrip. 
 ===== Background ===== ===== Background =====
  
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 The mri file can subsequently be used for e.g. plotting source localization results (see the [[tutorial/​plotting#​plotting_data_at_the_source_level|plotting tutorial]]) or for preparing a headmodel (see the [[tutorial/​beamformer#​the_forward_model_and_lead_field_matrix|beamformer tutorial]]). The mri file can subsequently be used for e.g. plotting source localization results (see the [[tutorial/​plotting#​plotting_data_at_the_source_level|plotting tutorial]]) or for preparing a headmodel (see the [[tutorial/​beamformer#​the_forward_model_and_lead_field_matrix|beamformer tutorial]]).
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