3D aids coronary stent planning

November 4, 2004

Restenosis following stent placement to open a clogged coronary artery happens with alarming frequency.

A contributing factor may be improper placement of the stent.

Two software packages designed to make stent placement more precise and reduce patients' exposure to x-rays and contrast media were introduced in late September at the Transcatheter Cardiovascular Therapeutics (TCT) conference in Washington, DC.

Images created with the Philips' Allura 3D-Coronary Angiography (left) and Siemens' Interventional Cardiac 3D software (right) demonstrate the exact size and shape of diseased coronary vessels. Legends built into the displays indicate the orientation of the blood vessels relative to the cardiac cath systems. Quantitative measurements of the vessel wall can also be displayed.

Siemens' IC3D was shown as a commercial product, having cleared the FDA in July. Philips' Allura 3D-CA was still in FDA review at the start of the conference.

Philips' new software works with the company's latest digital cardiac cath system, the Allura Xper FD20, but it is also compatible with Philips' cardiac equipment built around image intensifiers. Siemens' IC3D product is being paired with the company's Axiom Artis digital cardiac cath system.