![NDI (Northern Digital Inc) on Twitter: "NDI Passive Spheres are compatible with most Image-Guided Surgery (IGS) systems available today and mount to standard snap-on posts. Learn more about the industry's original and NDI (Northern Digital Inc) on Twitter: "NDI Passive Spheres are compatible with most Image-Guided Surgery (IGS) systems available today and mount to standard snap-on posts. Learn more about the industry's original and](https://pbs.twimg.com/media/FLotI2hX0AMm148.jpg:large)
NDI (Northern Digital Inc) on Twitter: "NDI Passive Spheres are compatible with most Image-Guided Surgery (IGS) systems available today and mount to standard snap-on posts. Learn more about the industry's original and
![10pcs Passive Infrared Reflector Ball Motion Capture 3D Film Animation Marking Ball Marking Point ART Positioning 10pcs Passive Infrared Reflector Ball Motion Capture 3D Film Animation Marking Ball Marking Point ART Positioning](https://ae01.alicdn.com/kf/S84c7d00e7dda457996f14c7690138b869.jpg_640x640Q90.jpg_.webp)
10pcs Passive Infrared Reflector Ball Motion Capture 3D Film Animation Marking Ball Marking Point ART Positioning
![Active versus passive marker arrays-comparison of active marker arrays... | Download Scientific Diagram Active versus passive marker arrays-comparison of active marker arrays... | Download Scientific Diagram](https://www.researchgate.net/publication/359836847/figure/fig2/AS:1144839299170308@1649962367945/Active-versus-passive-marker-arrays-comparison-of-active-marker-arrays-used-in-the.png)
Active versus passive marker arrays-comparison of active marker arrays... | Download Scientific Diagram
![Working Principle of the novel passive marker with imaginary reflection... | Download Scientific Diagram Working Principle of the novel passive marker with imaginary reflection... | Download Scientific Diagram](https://www.researchgate.net/publication/235221074/figure/fig1/AS:299755189096449@1448478614389/Working-Principle-of-the-novel-passive-marker-with-imaginary-reflection-surface.png)
Working Principle of the novel passive marker with imaginary reflection... | Download Scientific Diagram
![Linear Arrangement of Spherical Markers for Absolute Position Tracking of a Passive Stylus | SpringerLink Linear Arrangement of Spherical Markers for Absolute Position Tracking of a Passive Stylus | SpringerLink](https://media.springernature.com/lw685/springer-static/image/chp%3A10.1007%2F978-3-031-05409-9_4/MediaObjects/533287_1_En_4_Fig1_HTML.png)
Linear Arrangement of Spherical Markers for Absolute Position Tracking of a Passive Stylus | SpringerLink
![Optical Positioning Marking Ball Motion Capture Marker Point NDI Passive Reflection Near Infrared Reflective Sphere - AliExpress Optical Positioning Marking Ball Motion Capture Marker Point NDI Passive Reflection Near Infrared Reflective Sphere - AliExpress](https://ae01.alicdn.com/kf/S4ead534891f14e2f99795e308fe06ff4U.jpg_640x640Q90.jpg_.webp)