An endoluminal imaging device is provided that includes a flexible elongate member 115 for placement within a body cavity of a patient, a support member 300 coupled to the flexible elongate member, and an imaging assembly 110 coupled to the support member. The support member includes a proximal section 310 that mates with the distal portion of the flexible elongate member and a distal section 320 that mates with the proximal end of the imaging assembly, the proximal section having a first diameter, The distal section has a second diameter that is less than the first diameter.患者の体腔内に配置するためのフレキシブル伸長部材１１５と、フレキシブル伸長部材に結合される支持部材３００と、支持部材に結合される撮像アセンブリ１１０とを含む管腔内撮像デバイスが提供される。支持部材は、フレキシブル伸長部材の遠位部と結合する近位セクション３１０と、撮像アセンブリの近位端と結合する遠位セクション３２０とを含み、近位セクションは、第１の直径を有し、遠位セクションは、第１の直径よりも小さい第２の直径を有する。
