Varian recalls certain multileaf collimators with software version 8.5 that may not move during arc treatments. No injuries reported. Affected units include specific models and product codes.
After a recent upgrade to the collimator software version 8.5, the firm became aware that the multi-leaf collimator leaves did not move during an arc treatment. The issue is related to a transient carriage primary- secondary interlock due to carriage fault on the MLC that immediately preceded the initiation of the arc treatment. The issue will occur only with MLC software version 8.5 and only affects conformal arc treatments, including VMAT and RapidArc. There have been no reports of adverse health consequences due to this issue.
Varian is recalling multileaf collimators with software version 8.5 that may not move during arc radiation treatments. This could affect conformal treatments like VMAT and RapidArc. No injuries have been reported from this issue.
After a software upgrade to version 8.5, the collimator leaves may not move during arc treatments. This issue only occurs with specific models and software versions during conformal radiation therapy procedures.
Radiation therapy clinicians using Varian multileaf collimators with software version 8.5 are most at risk. Patients receiving treatments with these specific models may also be affected.
Check if your Varian multileaf collimator has software version 8.5. Affected models include the Millenium MLC with 52, 80, or 120 leaves and product codes H54 or H56.
Verify your multileaf collimator's software version. If it is 8.5, it may be affected.
No injuries have been reported, but the issue could affect treatment accuracy during arc radiation therapy.
Millenium MLC models with 52, 80, or 120 leaves and product codes H54 or H56 with software version 8.5.
No immediate action is required as the remedy is not specified, but you should check your software version.
We’ve drafted a message you can send Varian to request your refund or repair — edit it as you like.
Subject: Recall Z-1899-2020 — Varian Varian Hello, I own a Varian that is covered by recall Z-1899-2020 from Varian. I’m writing to arrange the remedy described in the recall (a refund, repair, or replacement as applicable). Could you please tell me the next steps to resolve this? Thank you.
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The facts (hazard, remedy, dates, manufacturer) are pulled from the official FDA recall record. The plain-language summary and step-by-step checklist are written by GovInfoNow to make the official notice easier to act on — they don’t replace it.
