Q: What distinguishes the Paritic navigation system from other existing systems?
A: There are several aspects:

1. Save time. About 2 minutes extra time for a skilled person to apply the pariticTM navigation system to reduce repeating CT scanning and repeating needle advance;

2. Easy registering just on a mouse click. There are no skin markers to handle;

3. Good accuracy for navigation directions. It is up to 1.0 degree when using in a good condition;

4. Sensor reusable. Disposal parts are affordable;

5. Applicable for different needle instruments. Sensors can be easily mounted on needle instruments;

6. CT and Ultrasound fusion. CT and Ultrasound are overlapped for a better observation;

7. Available to work with surgical robots for guidance;

8. Detailed specified surgical planning feature. Simulating ablation area and needle placement are planned for needle tip to cover whole lesion region for optimal region treatment;


Q:  How long does it take additionally to apply the pari-pathTM navigation system, compared with a conventional minimally invasive procedure?

A:About 2 minutes extra time for a skilled person to apply the pari-pathTM navigation system during the mini-invasive procedure, including attaching a sensor on a surgical needle... 

                                                           Comparation of time spent

Step ID 

Use PariticTM navigation system

Time spent (Min)

No use navigation system

Time spent (Min)


Attach localization

box  including metal

markers on the skin

About 1

Attach localization metal grids on the skin

About 1


CT scanning

About 3

CT scanning

About 3


Transfer CT images from CT to the navigation system via local network

About 0.3




Adjust the field transmitter of the navigation system to a proper surgical area

About 0.2




Software operation:

segment metal markers

and register

About 1




Optional software operation: connect ultrasound, fuse CT and ultrasound

About 0.2

No fusion of CT with ultrasound



Attach reusable sensor to the needle 

About 1




Software operation:rote planning

About 0.5


rote planning

About 0.5








Measure and

mark an inserting

point on the skin


About 1



About 7-8


About 6-7


Advance needle:

few times


Advance needle: multiple times



Q: Does the system allow flexibility for utilizing the various types of needles and probes selected for the procedure?

A: Yes, the system is totally flexible for any needle mounting. The Paritic sensor can be easily mounted on the tail of any approved needle instrument ready immediately for use.


Q: How accurate is the navigation system?
A: The surgical needle’s position is tracked and is accurate to within 2 mm and needle’s direction is accurate to within 1.5 degree, when there is no significant interference from other electrical equipments or magnetic materials in the operating environment. Check with user manual for factors of interference from other electrical equipments or magnetic materials.


Q: How is the patient’s respiration taken into consideration when focusing on system accuracy?
A: The Ultrasound system is used to monitor the real time anatomical structure of a patient and it is co-worked with the navigation system to present high accuracy during the procedure.


Q: Are the parts and fixtures of the navigation system reusable?  How should they be sterilized?
A: Though the reusable plastic sensor parts has no contact with patients and are protected by sterile plastic covers during procedures, they can be sterilized by those disinfectants recommended in the user manual. They cannot be gas sterilized or autoclaved.


Q: How detailed and specific is the Pari-path navigation system when planning a procedure involving a large lesion requiring multiple ablation needle insertions to cover the entire treatment area?
A: This problem underlines the importance of optimal insertion, advance and positioning of each needle path so the tip is able to treatment the specific shape and total lesion according to the different type of ablation needle. This is key to the procedural integrity and success and minimizing damage to healthy surrounding tissues. The Pari-Path navigation system presents the simulated ablation region readily on the monitor in 3D so the operator can confidently observe and evaluate the procedure as it progresses to its defined completion.