Data acquisition procedure.
DISORDERS
60 participants with methamphetamine use disorders were randomly assigned to the active or sham group. MRI data including structural MRI for creating head models, resting-state fMRI, and fMRI drug cue reactivity task were collected before and after unilateral DLPFC stimulation. Behavioral data including VAS scores were also collected immediately before and after MRI sessions, at the baseline, and the day after. The methamphetamine cue reactivity (MCR) task was conducted following each resting-state scan. The MCR task involved presenting pictorial methamphetamine cues in a block design, consisting of two sets of distinct but equivalent pictures that had been validated in a previous study. The total duration of the task was approximately 6.5 minutes and included 4 blocks of neutral pictures and 4 blocks of methamphetamine pictures. Each block consisted of 6 pictures from the same category (meth or neutral), with each picture presented for 5 seconds and a 0.2-second blank interval between them. A visual fixation point was displayed for 8 to 12 seconds between each block. After each MRI session participants were asked to rate their current level of methamphetamine craving on a scale from 1 to 100 using VAS score. Craving scores were also collected at the baseline session and the day after the stimulation. More details on imaging parameters can be found in supplementary materials 