Example MRI compatible microdrives
| Availability | Manufacturer/source | Construction style | Actuating mechanism | Electrode travel distance | Craniotomy required |
|---|---|---|---|---|---|
| Commercial | NeuroNexus, Inc. (MRI-compatible matrix array) | Stand-alone | N/A | Fixed length (max 15 mm) | Yes |
| FHC, Inc. (NeuroPace) | Stand-alone | N/A | Fixed length based on electrode | No | |
| NaN Instruments, Inc. (NAN MRI drive) | Tower style | Motorized screw type | Max: 120 mm | Yes | |
| Academic | Kern et al. (2008) | Stand-alone | Ultrasonic actuator | Max: 50 mm | Yes |
| Grahn et al. (2016) | Frame-based stereotactic system | Manual screw type | Max: 12 mm | Yes | |
| Dotson et al. (2017) | Stand-alone | Manual screw type | Max: 20 mm | Yes | |
| Sudhakar et al. (2019) | Stand-alone | N/A | Fixed length based on electrode | Yes |