Intermittent Theta-burst (iTBS)
Intermittent Theta-burst or iTBS is a short 3 minute high frequency excitatory protocol that was recently approved by the FDA. They are patterned 5Hz bursts with each burst containing 3 pulses at 50Hz.
Train 1
10 bursts at 5.0Hz
10 bursts at 5.0Hz
8s
Train 2
10 bursts at 5.0Hz
10 bursts at 5.0Hz
8s
Train 3
10 bursts at 5.0Hz
10 bursts at 5.0Hz
8s
Train 4
10 bursts at 5.0Hz
10 bursts at 5.0Hz
8s
Train 5
10 bursts at 5.0Hz
10 bursts at 5.0Hz
8s
Train 6
10 bursts at 5.0Hz
10 bursts at 5.0Hz
8s
Train 7
10 bursts at 5.0Hz
10 bursts at 5.0Hz
8s
Train 8
10 bursts at 5.0Hz
10 bursts at 5.0Hz
8s
Train 9
10 bursts at 5.0Hz
10 bursts at 5.0Hz
8s
Train 10
10 bursts at 5.0Hz
10 bursts at 5.0Hz
8s
Train 11
10 bursts at 5.0Hz
10 bursts at 5.0Hz
8s
Train 12
10 bursts at 5.0Hz
10 bursts at 5.0Hz
8s
Train 13
10 bursts at 5.0Hz
10 bursts at 5.0Hz
8s
Train 14
10 bursts at 5.0Hz
10 bursts at 5.0Hz
8s
Train 15
10 bursts at 5.0Hz
10 bursts at 5.0Hz
8s
Train 16
10 bursts at 5.0Hz
10 bursts at 5.0Hz
8s
Train 17
10 bursts at 5.0Hz
10 bursts at 5.0Hz
8s
Train 18
10 bursts at 5.0Hz
10 bursts at 5.0Hz
8s
Train 19
10 bursts at 5.0Hz
10 bursts at 5.0Hz
8s
Train 20
10 bursts at 5.0Hz
10 bursts at 5.0Hz
8s
Performed at 80% motor threshold. The train(s) consist of 30 pulses: 10 bursts (3 pulses/burst) delivered at 5.0 bursts per second for a total of 2 seconds followed by a break of 8 seconds and then repeated 20 times.
Inside each burst are 3 pulses delivered at 50 times per second or one pulse every 0.02 seconds.Parameters
| Stimulation type | Burst |
|---|---|
| Stimulus amplitude (% of MT) | 80 |
| Burst frequency in train (Hz) | 5.0 |
| Pulses frequency in burst (Hz) | 50 |
| Bursts in train | 10 |
| Number of trains | 20 |
| Intertrain interval(s) | 8 |
| Total time | 00:03:47 |
| Total pulses | 600 |
Literature
Intermittent Theta-burst or iTBS is a short 3 minute high frequency excitatory protocol that was recently approved by the FDA. They are patterned 5Hz bursts with each burst containing 3 pulses at 50Hz.