ClearanceBrief
Recall Z-0588-2015 ยท LHN System, Radiation Therapy, Charged-Particle, Medical

Mevion Medical Systems, Inc.

MEVION S250, used for proton radiation therapy.

DateDec 12, 2014 (initiated Nov 10, 2014)
StatusTerminated
ReasonSoftware defect that causes an incorrect dose compensation function to be applied to the internal dose ionization chamber when either pressure or temperature sensor malfunction. This could result in an incorrect dose delivery of no more than 5%.
Root causeSoftware design
ActionMevion Medical Systems sent an Important Safety Notice letter to the affected customer. The letter identified the affected product, problem and actions to be taken. A software update addressing the issue will be provided to the customer on or about December 5, 2014. For questions or concerns, email lbouchet@mevion.com or call 978-540-1555.
Quantity1
DistributionUS Distribution in the state of MO
FDA recordOpen on fda.gov

510(k) clearances named in this recall

K120676S-250 PROTON BEAM RADIATION THERAPY SYSTEM
Mevion Medical Systems, Jun 4, 2012