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MagPro TMS in fMRI Solution



system compatible with scanners from 1.5 to 4 tesla
Il sistema di MagVenture che consente l'impiego della TMS in risonanza magnetica è stato sviluppato affrontando e risolvendo efficacemente tutti i problemi dovuti ad artefatti statici e dinamici, tipici dell'ambiente Neuroimaging. Particolare attenzione è stata dedicata anche alla sicurezza per offrire al paziente e all'operatore la massima protezione durante il trattamento.



  • Clinical studies with trials that require transcranial magnetic stimulation (TMS) of patients contemporary performing functional magnetic resonance imaging (fMRI)

  System Components

  • Repetitive magnetic stimulator
  • Special magnetic coil MRi-B90
  • Filter Power Line
  • remote Control


Noise reduction for filter
RF noise can greatly affect the signal-to-noise ratio. To effectively prevent RF noise being brought into the scanner room from the MagPro stimulator a Power Line Filter - mounted on the outside of the scanner wall - filters power and signal cables. It provides very effective RF noise reduction in the 40MHz to 200MHz range and can thus be used for scanners in the 1.5T (RF 64MHz) to 4.0T (RF 170MHz) range.
To reduce Leakage Current in the coil while the MagPro is not stimulating, the MagPro stimulators for TMS-fMRI are modified such that a reverse current is sent into the output connector with reverse "polarity" and proportional to the intensity. The noise generated when the MagPro stimulator recharges can interfere with the image quality. Using the standard Charge Delay functionality in the MagPro this noise can be inhibited. The charge delay can be adjusted from 0 ms to 10.000 ms.


magpro remoteSafety aspects are also dealt with effectively. Due to the static magnetic field of the scanner,the MRi-B90 II coil can only withstand standard biphasic pulses and for this reason the MagPro stimulators are automatically locked in biphasic pulse mode when the MRi-B90 II is attached. Coil, Remote Control and Emergency Stop contain no ferromagnetic materials and two emerency stops can be connected - one for the patient/volunteer; one for scanner personnel.MRi-system setup 3


Coil MRi-B90

MRI-B-90IIThe mere presence of the coil can create artifacts and to mimimize eddy current effects individually isolated copper litze wires are used in the MRi-B90 II coil. To minimize  coil vibrations, which also cause artifacts, the mechanical damping properties of the coil have been optimized. To ease installation in MR-compatible coil holders, the MRi-B90 II comes with two holes at the centers of the two windings.

Click here to see MRi-B90 details

Mechanical Properties

  • Weight of transducer head: 1.1 kg
  • Dimensions of transducer head: 172 x 142 x 34 mm
  • Cable length: 6 m

Coil Winding Data

  • Inner diameter: 2 x ø35/ø52
  • Outer diameter: 2 x ø75/ø92
  • Winding height: 18 mm
  • Number of windings: 2x (2x5)
  • Distance between centers: 79 mm

Magnetic & Electrical Properties

  • Max initial dB/dt ≥24 kT/s
  • Max B Field 1.8 Tesla
  • Active pulse width: 280µs (Biphasic)


  • Number of stimulations before warm-up at coil start temperature 20°C and mean output 100% of maximum at 1pps.


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