@boomermeg . Thanks for sharing that "other" method for diagnosing GCA. I have not heard of it but it could be or be similar to the doppler used in echocardiograms. I was going off of what my DR of optometry told me when we recently looked at a high resolution photo of my eyes. He said to stay away from the biopsy method as it has its issues. He explained to me that diabetes, heart disease, GCA, Uveitis, and other things can be diagnoses by looking at the small arteries in the eye with the high resolution photos or with a scope. It was quite a fascinating discussion. In addition, one can see if one had ever had GCA by the remnants in those arteries. Happy to say that his investigation of mine showed that I had been spared GCA during my PMR journey that ended in March of 2026. Amazing stuff.