VISICOIL ^TM linear fiducial markers are naturally visible by ultrasound, x-Ray, CT, MRI, and high-energy photons (portal images), allowing the physicians to implant the markers under one mode and later visualize them by another technique for treatment planning.

The coiled-wire design of VISICOIL ^TM provides extreme flexibility of the marker and allows the marker to conform with highly mobile soft tissue.

The extended and coiled-wire structure of the VISICOIL ^TM provides for stability of the marker in tissue. The marker is designed to minimize migration and movement... in essence, to stay where you implant it.


The results of implantation into a canine prostate model indicate that the VISICOIL ^TM markers stayed in place once deployed, even when beyond the margin of the gland.

The extended length of the VISICOIL ^TM marker allows the eye to track the marker image in soft tissue. As has been demonstrated in anatomical phantoms, VISICOIL ^TM can be more easily recognized than the much larger point markers and with less confusion.

 
Green arrows note the VISICOIL ^TM markers. Comparative seeds are labeled with Orange arrows. X-Ray Image Courtesy of Dirk Verellen, University of Brussels.

Three points, when correctly visualized, define a plane.

Two or more VISICOIL ^TM markers can provide volume information.

These markers can be inserted by a fine needle, from 22- to 18-gauge, resulting in a less traumatic procedure to the patient. (Actual needle gauge is dependant upon the diameter of the marker to be implanted.) Typically, a 17-gauge or larger needle has been used to introduce the 1.2mm marker shown.

Comparison of a 0.75mm VISICOIL ^TM (top), 0.35mm VISICOIL ^TM(center) and solid 1.2mm "seed" markers.

VISICOIL ^TM markers are visible using various imaging modalities. Thus, the position of the marker or markers can be used for image fusion when using different modes (e.g. MRI-CT, US-CT, etc.).

The VISICOIL ^TM delivery system is a simple design made to introduce (drop) the marker into the lumen of the appropriate needle.

The VISICOIL ^TM markers are delivered sterile and ready for use in the OR.