Caroline Elizabeth Blane MD, Presenter: Nothing to Disclose

Mitchell M. Goodsitt PhD, Abstract Co-Author: Nothing to Disclose

Jeffrey C Grimm BEng, Abstract Co-Author: Nothing to Disclose

James Pavlik BEng, Abstract Co-Author: Nothing to Disclose

Daniel March BEng, Abstract Co-Author: Nothing to Disclose

Jonathon T Ong BEng, Abstract Co-Author: Nothing to Disclose

Mark Alan Helvie MD, Abstract Co-Author: Institutional grant, General Electric Company

et al, Abstract Co-Author: Nothing to Disclose

Current wire localization compression paddles provide a limited access window and no compression in this window. We describe a new compression paddle that addresses these issues, and report on preliminary patient testing.

Four Mechanical Engineering students collaborated with a Medical Physicist and 2 Radiologists. They were given the requirements needed to improve patient comfort, and accuracy and efficiency of wire localization in mammography. Several concept designs were developed one of which utilized a mesh surface resembling a tennis racket. This went on to prototype development. After phantom testing, IRB, FDA waiver for non-significant risk device, and Medicare Part A exemption, were obtained to evaluate the device in 10 patients going to wire localization for medical indications. Informed consent was obtained in 10 patients. A range of breast size was included. Wires were positioned from superior, lateral and medial approach.

A total of 10 wires were positioned in 9 patients. The technical failure in one patient was due to the single paddle size. Patient comfort: All patients preferred the test paddle to routine paddle. Grid system: Accurate localization of suspicious finding Mesh: Not visible in digital mammograms so no interference with visualization Multiple wires: performed in same active window  

The new mesh paddle improves on current available models. The new paddle was built in a single size prototype. For universal applicability, the paddle would need to be manufactured in 2 sizes as is the case for conventional wire localization paddles. Advantages included lack of visual (on imaging) and technical interference from the compression mesh and yet compression of the active window allowed ready localization of subtle calcifications and asymmetries. The large active area improved immobilization of large breasts and facilitated multiple wire placements within a single window. All localizations were easily performed on the initial image due to the large active window.

We hope to interest a company in commercialization of this new design.

Blane, C, Goodsitt, M, Grimm, J, Pavlik, J, March, D, Ong, J, Helvie, M, et al, , New Compression Paddle for Wire Localization in Mammography.  Radiological Society of North America 2008 Scientific Assembly and Annual Meeting, February 18 - February 20, 2008 ,Chicago IL. http://archive.rsna.org/2008/6008616.html