Updated technology and diagnostic tools, including those listed here, allow us at Vista Health System to identify and treat conditions with greater speed and efficiency. Diagnostic tests are offered as both inpatient and outpatient services, giving you the ability to get more informed answers to your health needs. Order Fax Facilitator (847) 625-4462. Services Offered at this Location: Bone Density (DEXA) CT General Radiology General Ultrasound