Navigating on CT images

A CT image just at the plane of a surgical needle shows up, along with the tracked needle moves by a doctor's operation during a procedure in real time in 3D space. 

The CT image can turn 360 degree along the needle axis. While the needle changes its position and direction, the corresponding CT image at the plane of the needle displays. Those CT images are from pre-acquired scan set. That is like a procedure guided by a real time Ultrasound system.
With Pari-Path surgical navigation, a "real time" CT image and a simulated needle can display in 3D space during a mini-invasive procedure for much better visual guidance. 


Pari-path surgical navigation

Other surgical navigation

Position accuracy

about 1~2 mm* in a wide region

In a region close to sensor

Direction accuracy

about 0.50~10 * in a wide region



popular needle-liked instruments

special needles only



expensive, disposal

Register method

(mapping image with world space)

pari-pathTM method

1. accurate in a wide region

2. register accuracy <1 mm*

displayed on the screen

3. no need surgeons to handle markers

just a mouse click


metal-markers method

need to handle markers

sensors as markers

1. good accuracy in a region near to sensors

2. poor accuracy in a region  far from sensors

3. no need to handle markers

*Parameters (in root mean square) are typical on static objects with normal operations, may vary and are not guaranteed.
An live display of  CT images and a surgical needle during an interventional procedure    
A real time surgical navigation with two windows of side view and front view

An example of navigation on CT 3D model of a phantom