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25
current distribution in the brain
comparison of ECT, TMS, Tdcs and IASIS
Induced current
density (A/m2)
ECT: 225
TMS: 3
tDCS: 0.3 – 0.8
IASIS: 0.0056
Applied Amps (mA)
ECT: 800
tDCS: 1-2
AA battery: 0.3
IASIS: 0.02
Also, IASIS is only on for brief
bursts, amounting to only ~0.03
seconds per session, whereas
tDCS is on continuously.
Electric field (V/m)
tDCS: 0.4
TMS: >100 (capable of trigger-
ing action po-
tentials)
Peak Power
IASIS: ~2
mWatts
AA battery: ~450
mWatts
impedance check
CHOOSE PROTOCOL
wait for signal to stabilize
10-20 MEASUREMENTS
Subject 1, Session 1
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