Diagnostic Imaging Department - Northridge Hospital Medical Center - Northridge offers many services, including diagnostic catheterization, radiology, and MRI. Visit Diagnostic Imaging Department - Northridge Hospital Medical Center - Northridge located at 18300 Roscoe Blvd, Northridge, CA. As part of the Dignity Health network, Diagnostic Imaging Department - Northridge Hospital Medical Center - Northridge is dedicated to delivering high quality, compassionate care and access to Northridge and nearby communities.