Our technologists have been trained in the proper use and function of the Portal Gravity System. This training was provided by David Carter Director of Operations, Portal, Inc. at Portal Medical of North Logan, Utah. Ankle Tenogram : injection technique to relieve chronic ankle pain. ( Ankle tenography is primarily a diagnostic technique to aid in diagnosing chronic ankle pain, referable to the tendons, that has been unresponsive to more conservative therapy (., immobilization, bracing and physical therapy). These can be accompanied with injection as a combination of local anesthetic and steroid. This has been shown to be useful in localizing pain and in surgical decision making.