A bone scan is done to: 1  Find bone cancer or determine whether cancer from another area, such as the breast, lung, kidney, thyroid gland, or prostate gland, has spread (metastasized) to the bone. 2  Help diagnose the cause or location of unexplained bone pain, such as ongoing low back pain.
June 13, 1720, cyclical sign kanoe-ne: The date the original Gohonzon was transcribed by Nichikan Shonin. Cyclical sign refers to one of sixty calendar signs, which are based on the twelve animal signs of the Chinese zodiac and the ten elements of nature according to old Chinese traditions.
It has a shu-mei attributing it to Aoe Tsunetsugu. There is a Sayagaki by Honami Kozon confirming this attribution. The sword was awarded Juyo papers in 1965. The papers attribute the blade to the Aoe School of the late Kamakura period.