For nearly any image, you can use radiologyassist.com to get cash prices in your area. Please note that you do still need to have the image ordered by a licensed medical provider. If needed, RadiologyAssist offers a virtual consultation with a medical provider for $40
MRI generally ranges from ~$270-$1,000
CT is usually a few hundred dollars
Mammograms are usually under $200
Ultrasounds are usually under $200
X-rays are usually under $100