I never received an MRI. They don't need it to determine a tear.
Diagnosing a Torn Achilles Tendon
The Orthopaedic Associates of St. Augustine offers the experience of board certified orthopaedic surgeons as well as a board certified podiatrist to treat Achilles injuries.
Upon arrival one of the first things the doctor will do is evaluate your leg and ankle for swelling and discoloration. You may feel tenderness and the doctor may detect a gap where the ends of the tendon are separated. In addition to X-rays, the calf squeeze, or Thompson test, will be performed to confirm an Achilles tendon rupture. With your knee bent, the doctor will squeeze the muscles of your calf and if your tendon is intact the foot and ankle will automatically flex downward. In the case of a ruptured Achilles there will be no movement in the foot and ankle during the test.