The present invention includes a C-shaped structure (14), a radiation detector support section (13), the closer to the end portion of the support portion (13) of said C-shaped structure (14) (11) or as can be separated, provided with a connecting portion and (6) for connecting said supporting portion (13) to said C-shaped structure (14), wherein the connecting portion (6), which can be curved to reduce its bulk structure It has been with, on the C-arm of the medical imaging system.FIELD 1本発明は、C型構造(14)と、放射線検出器支持部(13)と、前記支持部(13)が前記C型構造(14)の端部(11)に対して接近または離間できるように、前記支持部(13)を前記C型構造(14)に連結する接続部(6)とを備え、前記接続部(6)が、その嵩を小さくするように湾曲可能な構造とされている、医療用撮像システムのCアームに関する。【選択図】図1