MAUDE Adverse Event Report: ELEKTA SOLUTIONS AB MOSAIQ; ACCELERATOR, LINEAR, MEDICAL

Lot Number	VERSION 3.2.2.0
Medical Device Problem Code	Computer Software Problem (1112)
Health Effect - Clinical Codes	Insufficient Information (4580); No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	05/13/2025
Type of Reportable Event	Malfunction
Additional Manufacturer Narrative
H4: manufacturing date is not on the label, but it is known so field h4 has been completed with this information.H11: the manufacturer's investigation is on-going and further information will be provided once the investigation has completed.
Event or Problem Description
The customer reported that the applied shifts do not display in trend review (values are zeroed out).
Additional Manufacturer Narrative
H11 updated: the customer reported that the applied shifts do not display in trend review (values are zeroed out).The investigation was completed by conducting a thorough evaluation of the product and the reported information.The customer is using mosaiq with a hitachi proton machine for treatment delivery.This specific configuration uses the "tdw-ii" interface.With the "tdw-ii" interface, hitachi does not encode offset shifts derived from 2d image registration during site setup verification.Moreover, mosaiq does not have coding for processing such shifts with machines having the tdw-ii interface.It is expected that applied shifts do not display in 2dirw and trend review (values are zeroed out) with the current design for the tdw-ii interface.Mosaiq did not have any malfunction and is working as designed and intended.This scenario happened after treatment delivery, therefore there was no patient mistreatment.

• Brand Name: MOSAIQ
• Common Device Name: ACCELERATOR, LINEAR, MEDICAL
• Manufacturer (Section D): ELEKTA SOLUTIONS AB; hagaplan 4; stockholm, 113 6 8; SW 113 68
• Manufacturer (Section G): ELEKTA SOLUTIONS AB; 400 perimeter center terrace; suite 50; atlanta GA 30346
• Manufacturer Contact: cornerstone; london road; crawley, west sussex RH10 -9BL
• MDR Report Key: 22192187
• Report Number: 3015232217-2025-00033
• Device Sequence Number: 8628267
• Product Code: IYE
• UDI-Device Identifier: 07340201500071
• UDI-Public: (01)07340201500071(10)3.2.2.0
• Combination Product (Y/N): N
• Initial Reporter State: TX
• Initial Reporter Country: US
• PMA/510(K) Number: K223229
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Serviced by Third Party (Y/N): Unknown
• Reporter Type: Manufacturer
• Report Source: Other,User Facility
• Initial Reporter Occupation: Non-Healthcare Professional
• Type of Report: Initial,Followup
• Report Date (Section B): 08/14/2025

1 Device was Involved in the Event

1 Patient was Involved in the Event

• Is this an Adverse Event Report?: No
• Is this a Product Problem Report?: No
• Operator of Device: Health Professional
• Device Lot Number: VERSION 3.2.2.0
• Was Device Available for Evaluation?: Yes
• Type of Report(Section G): Thirty-Day
• Initial Date Received by Manufacturer: 05/13/2025
• Supplement Date Received by Manufacturer: Not provided
• Initial Report FDA Received Date: 06/12/2025
• Supplement Report FDA Received Date: 08/14/2025
• Was Device Evaluated by Manufacturer? (Y/N): Yes
• Date Device Manufactured: 09/26/2024
• Is the Device Labeled for Single Use? (Y/N): No
• Is This a Single-Use Device that was Reprocessed and Reused on a Patient? (Y/N): No
• Usage of Device: Reuse
• Patient Sequence Number: 1
• Patient Sex: Unknown