CT-guided percutaneous intervention using a simple laser director device.

Fig. 1.-Laser pointerwith angle measurement device is manually placed on CT ganFig. 2.-Diagram illustrates alignment of device on CT gantry (G), short needle (N) on try surface (G). Laser beam angle (to vertical) (arrow) can be set easily using pointer skin surface, and path of guiding laser beam. Operator tilts needle until laser point meets that is directed opposite the weight (W) on measurement device. center of plunger )P).