Patients and Families. Since 1954, ARA has been a leader in imaging services in Austin and Central Texas, providing CT (CAT Scans) , MRI , Digital Mammography (mammograms) , X-rays , Ultrasound (Sonography) , PET/CT , Nuclear Radiology , Bone Densitometry, and Interventional Radiology. For more than 60 years, ARA has committed itself to ....