fusionTrack 250


Real-time  high-speed 120 Hz and low latency 4 ms
High-precision
90 μm RMS up to 1.4 m
Ethernet connection
for both data and power (PoE+)
Open system
 complete access to images and data
Active and passive markers
tracked simultaneously

The fusionTrack 250 is a passive and active, real-time optical pose-tracking system specially designed to detect and track reflective spheres, disks and IR-LEDs in real-time video streams. The fusionTrack is composed of two cameras that observe reflective and/or active fiducials (IR LEDs) simultaneously, and it uses triangulation to calculate their locations with unrivalled precision  and with an unparalleled non-interpolated measurement rate of 120 Hz. When several fiducials are affixed to a marker, the system can determine its pose (position and orientation) with 6 degrees of freedom (x,y,z,α,β,γ).

The fusionTrack SDK enables access to data in real-time at different stages of processing, including raw images, individual 3D positions of fiducials (reflective spheres and disks / IR-LEDs) and up to the pose  of markers. The  SDK also provides multi-level fault checking. It allows access to error information in real-time at any processing stage: fiducial occlusion level, stereo de-calibration, marker registration error and more.

The fusionTrack can be customized to fit your requirements (e.g. precision level, acquisition speed, working volume). Moreover, the system is compatible with existing passive image-guided surgical tools that are widely used in the medical field.

Technical specifications


Size294 mm x 86 mm x 99 mm
Weight1280 g
Accuracy(3)0.09 mm RMS up to 1.4m
0.20 mm RMS up to 2.0m
0.27 mm RMS up to 2.4m
0.18 mm 95% CI up to 1.4m
0.40 mm 95% CI up to 2.0m
0.54 mm 95% CI up to 2.4m
Tracking volumeStarts at 400 mm
Measurement rate120 Hz
Latency(4)~4 ms

Hybrid trackingReflective spheres / disks, Active wired and wireless
AcquisitionFiducial tracking at 54 Hz or Dense 3D reconstruction up to 54 Hz or
Alternance of both modes defined by user.
Resolution2.2 Mp
Max. simultaneous markers(1)Almost unlimited
Max. fiducials per marker5
InterfaceGigabit Ethernet 1000BASE-T (IEEE 802.3ab)
SDKC (DLL), C++, Python
Operating systemsWindows / Linux
Mounting4 x M4 screws
Power requirementsPower over Ethernet (PoE+ IEEE 802.3at-2009 type 2): 48V 0.6A 25.5W
Operating temperature15-25°C
ApprovalsElectrical safety
IEC 60601-1 ed3.1 (2012-08-20)
Electromagnetic compatibility
IEC 60601-1-2 ed 4.0 (2014)
CB-Report available
Hardware requirementsIntel(R) Core(TM) i3-6100U CPU @ 2.30GHz
4 GB DDR3 RAM
50 MB (Windows) 30 MB (Unix/Linux) disc space
Window 8.1 (32 and 64 bits supported)
Linux (32 and 64 bits supported), gcc 5.4 or clang 3.8

(1) 16 max recommended to preserve full speed
(2) Optional
(3) Based on a single fiducial stepped more than 1500 points throughout the measurement volume at 20°C. Average results on 7 devices.
(4) Tested with a USB connection and in the case of typical IR images with 4 markers including 4 fiducials in the center of the Working Volume and without interference

Due to continuous improvements, Atracsys reserves the right to modify the information or specifications without prior notice.

Download PDF


fusionTrack 250 – flyer v4

fusionTrack – CB certificate