Gradient Artefact Correction and Evaluation of the EEG Recorded Simultaneously with fMRI Data Using Optimised Moving-Average

Table 2

Median attenuation in the artefact frequency bins.

EEG data set
Philips data			GE data
Frequency Bin (Hz)	OMA	AAS	Frequency bin (Hz)	OMA	AAS
	Attenuation (dB)	Attenuation (dB)		Attenuation (dB)	Attenuation (dB)
20	45.3751	57.5263	14.01	16.9613	16.1357
40	78.9570	91.8088	28.01	33.6730	32.4054
60	85.6000	96.0201	42.02	60.0656	55.6886
80	98.2415	111.0143	56.02	62.9907	61.6082
100	98.3248	110.7207	70.03	47.2065	40.3737
120	110.7477	121.1444	84.03	67.6971	63.3023
140	117.0230	126.7208	98.04	70.2665	64.4877
160	104.1135	110.7799	112.04	77.2094	71.3954
180	112.6177	119.6797	126.05	76.8379	64.6367
200	120.2490	126.1687	140.06	71.6883	61.2908
220	122.7164	127.8049	154.06	92.4285	82.1534
240	120.7178	123.6904	168.07	73.6179	57.6112
260	122.9039	125.0317	182.07	103.6173	77.8464
280	116.5943	117.3843	196.08	104.8400	82.8587
300	130.2747	129.5068	210.08	111.4681	81.6893
320	141.4297	139.5853	224.09	111.8922	80.3991
340	140.0759	136.2834	238.10	127.1047	78.2103
360	142.5260	138.4374	252.10	143.5516	85.3269
380	144.0613	137.4788	266.11	149.7997	78.9997
400	140.8645	132.8269	280.11	153.8597	79.6079
420	137.6477	128.4942	294.12	174.5559	84.2324
440	142.1547	131.7775	308.12	163.7475	77.0851
460	142.6946	131.4058	322.13	173.4991	79.8261
480	141.9741	130.2354	336.13	173.0371	82.8779
500	131.2361	117.6283	350.14	179.3995	81.8668
			364.15	176.0360	81.8207
			378.15	160.9627	79.0052
			392.16	181.9554	80.8334
			406.16	163.7591	77.9195
			420.17	175.0643	79.6067
			434.17	175.9680	79.2014
			448.18	171.1805	78.3351
			462.18	171.7091	78.1379
			476.19	153.6883	77.2672
			490.20	171.5568	77.0958