Patent ID: 8062349

Claim:
A method of implanting a prosthesis in a patient at a treatment site, comprising the steps of: (a) loading a prosthesis into a prosthesis delivery sheath, the prosthesis delivery sheath including an alignment device having a pair of hemispherical-shaped radiopaque markers, each marker having a contact diameter and being symmetrical about the contact diameter on opposing sides of the contact diameter, wherein the hemispherical shaped radiopaque markers are on opposite sides of the prosthesis delivery sheath along respective longitudinal axes of the prosthesis delivery sheath; and (b) advancing the prosthesis delivery sheath in a patient to the treatment site, whereby the hemispherical-shaped radiopaque markers align to form a complete circular shape when the markers are viewed along an axis orthogonal to a major axis of the treatment site where the radiopaque markers are to be located.