An intravascular imaging device comprising: a flexible elongate member sized and shaped for insertion into a vessel of a patient, the flexible elongate member having a proximal portion and a distal portion; an imaging assembly disposed at the distal portion of the flexible elongate member, the imaging assembly including: a flex circuit comprising a controller region at a proximal portion of the flex circuit, a transducer region at a distal portion of the flex circuit, and a transition region extending between the controller region and the transducer region; wherein the flex circuit includes a continuous surface between the controller region and the transducer region and a plurality of conductive traces extending between the controller region and the transducer region within the transition region; and wherein the flex circuit comprises a plurality of cutouts extending within the transition region; and a support member around which the flex circuit is positioned, the support member having a proximal portion, a distal portion, and a central portion having greater flexibility than the proximal and distal portions; wherein the flex circuit is aligned with the support member such that the transition region of the flex circuit having the conductive traces is aligned with the central portion of the support member. a flexible elongate member sized and shaped for insertion into a vessel of a patient, the flexible elongate member having a proximal portion and a distal portion; an imaging assembly disposed at the distal portion of the flexible elongate member, the imaging assembly including: a flex circuit comprising a controller region at a proximal portion of the flex circuit, a transducer region at a distal portion of the flex circuit, and a transition region extending between the controller region and the transducer region; wherein the flex circuit includes a continuous surface between the controller region and the transducer region and a plurality of conductive traces extending between the controller region and the transducer region within the transition region; and wherein the flex circuit comprises a plurality of cutouts extending within the transition region; and a support member around which the flex circuit is positioned, the support member having a proximal portion, a distal portion, and a central portion having greater flexibility than the proximal and distal portions; a flex circuit comprising a controller region at a proximal portion of the flex circuit, a transducer region at a distal portion of the flex circuit, and a transition region extending between the controller region and the transducer region; wherein the flex circuit includes a continuous surface between the controller region and the transducer region and a plurality of conductive traces extending between the controller region and the transducer region within the transition region; and wherein the flex circuit comprises a plurality of cutouts extending within the transition region; and a support member around which the flex circuit is positioned, the support member having a proximal portion, a distal portion, and a central portion having greater flexibility than the proximal and distal portions; wherein the flex circuit is aligned with the support member such that the transition region of the flex circuit having the conductive traces is aligned with the central portion of the support member.