Automatic Detection of Puncture Needle from CT Image with Deep Learning and Difference of CT Value Along Craniocaudal Direction. - Seiya Kobayashi; Yuichiro Toda; Takayuki Matsuno; Kotaro Mayumi; Wataru Muramoto; Nozomu Fujitsuka; Takaaki Tanaka; Tetsushi Kamegawa; Takao Hiraki (SMC, 2023)