We’ve been running quite successfully with this PACS for 7 or 8 years with no real problems and with all modalities sending – a fair size of site including about 10*CR 2*MR, 2*CT, different suppliers for different modality types. Then one day they all stopped sending. Normally, if the PACS is unavailable for any reason (PACs down, network issue, whatever) the modality consoles will display an error message making the operators aware and they contact me. But in this case, there were no errors and the first we knew was when end users tried retrieving from the PACS but images weren’t there. PACS supplier contacted, they checked logs couldn’t find a problem, but whatever it was resolved itself a few hours later. The support contract includes an SLA stating they will resolve problems of this severity in x hours, which in this case they didn’t do and are being hit with a penalty of sufficient amount that it’s worth my while spending time on it. They deny any responsibility as they (claim to have) found nothing wrong.
Given that there is normally an error message regardless of the fault it’s obvious that the PACS sends confirmation that the image has been stored (like a TCP ACK, and this is what I’m referring to as Storage Commit) and that this, along with the storage, failed. My understanding, and I’m getting close to digging out the manuals on this, is that this confirmation is a mandatory part of the DICOM v3 standard, not optional, and if so and this is what failed, then they (PACS suppliers) have no arguement that it wasn’t a PACS fault, nor any argument as to the severity of the fault. Arguing a DICOM compliance failure shortens the discussion, but even if this is an optional element to the standard, it has been selected on our modalities, so they fail anyway, but not on DICOM compliance and they will argue this point.
longer winded than I’d intended, but basically what I’m looking for is a pointer to the relevant sections of the DICOM v3 standard becasue I know there is a lot of it.
Cheers