Anyone getting VQ scans any more?

Working in the community setting, I often will not be able to get a CTA on someone with renal impairment based on their labs. The radiologist will flat out refuse and with that the tech. So, I end up shipping these patients to a tertiary care center. I suspect though that at the mothership they just end up getting CTA's anyways. Is this assessment correct? Or do they end up getting VQ's?
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Source Type: forums