| 摘要 |
An interventional measuring tool for assisting with the accurate and precise determination of the effective radiation source length that will deliver the prescribed radiation or brachytherapy dosage to a targeted site within a patient. The interventional measuring or sizing tool comprises an elongated wire having a proximal section, a distal section, and an intermediate section therebetween, and two or more radiopaque markers affixed to the distal section of said elongated wire, said radiopaque markers spaced at predetermined distances that indicate to the user the effective length of the radiation source that will provide for effective radiation dosing of the targeted tissue being treated. The wire may have sufficient stiffness and flexibility to navigate the vascular system of a patient. In one embodiment, the first and second radiopaque markers are spaced about 30 mm apart. A third radiopaque marker may be added and spaced about 40 mm from the first radiopaque marker, and a fourth radiopaque marker may be added and spaced about 60 mm from the first radiopaque marker. Additionally, the wire may comprise a handle along its proximal section for easier manipulation and positioning of the wire within the body of a patient, and the handle may comprise a clip for gripping the distal end of said elongated wire for manageability when said tool is not in use.
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