3D Guidance Overview

Leveraging over 35 years of expertise in medical guidance technology, the trakSTAR and driveBAY provide highly accurate, real-time 3D position and orientation tracking in six degrees of freedom (6DOF). Both systems can simultaneously track up to four (4) reusable 6DOF electromagnetic tools, in a ready-to-use configuration that supports interchangeable sensor sizes.

Each system works in conjunction with a Mid-Range Transmitter (MRT) or Short-Range Transmitter (SRT) that generates the optimal tracking volume required for a diverse range of 3D medical navigation applications: ultrasound image fusion, biopsy needle guidance, oncology, and neurosurgery. A clear line of sight between the sensor and transmitter is not required.

The trakSTAR and driveBAY share the same reliability, versatility, and ease of use. Both systems have a small hardware footprint, require minimal cabling, and operate without the need for intermediate equipment (e.g. pre-amplifier) between the sensor and electronics unit. In terms of size, the trakSTAR is a desktop unit that connects directly into a main power source, while the driveBAY is designed to fit into a drive bay of your computer, using the computer’s power supply.


3D Guidance Technical Specifications


1.4 mm RMS, 0.5 degrees RMS

Number of Sensors

Four (4) 6DOF

Measurement Rate

80 Hz default, user-configurable from 20-255 Hz

Maximum Tracking Distance

MRT: 660 mm (Model 800 sensor: on positive X-axis)
SRT: 410 mm (Model 800 sensor: on positive X-axis)


USB on trakSTAR and driveBAY; RS-232 on trakSTAR only


trakSTAR: 100-240 VAC, 50/60 Hz
driveBAY: Molex Power Connector; +12 V: 1.6 A nominal, 2.9 A maximum; +5V: 600 mA nominal

Mid-Range Transmitter

96 mm x 96 mm x 96 mm, 2.3 kg
3.3 m cable length

Short-Range Transmitter

64 mm x 46 mm x 52 mm, 0.29 kg
3.3 m cable length

trakSTAR Electronics Unit

290 mm x 184 mm x 64 mm, 1.31 kg

driveBAY Electronics Unit

180 mm x 147 mm x 41 mm, 0.84 kg (Fits a 5.25-inch PC drive bay)

Available Sensors

Model 55: 0.56 mm diameter, 80-300 mm length, 230 mm cable (needle biopsy cable configuration only)
Model 90: 0.9 mm diameter, 8 mm length, 330 mm cable
Model 130: 1.5 mm diameter, 7.7 mm length, 330 mm cable
Model 180: 2.0 mm diameter, 9.9 mm length, 330 mm cable
Model 800: 8.0 mm square, 20 mm length, 330 mm cable

Software support

Windows: DLL API: Low-level RS-232 interface

Approvals and Classifications

Class I Device with Type B Applied Part (Sensors), EN60601-1, 2nd edition Compliant, RoHS and WEEE Compliant
Refer to the user guide for a complete listing of approvals and classifications.

3D Guidance Components

Electronic Units

4col_trakstar  4col_drivebay


A desktop electronics unit with integrated power supply which can track up to four 6DOF sensors simultaneously.


The tracking electronics fit into the drive bay of a PC chassis and tracks up to four 6DOF sensors simultaneously. The unit uses the power provided by the PC power supply and no additional power supply is required.


Emits a low-intensity magnetic field and establishes the coordinate frame and tracking volume. The transmitters come in two different sizes.

 4col_transmitter_large  4col_transmitter_small

Mid-range Transmitters

The Mid-Range Transmitter (MRT) offers a flexible set-up that can be integrated into most applications where the tracking volume needs to cover a larger anatomical region. The MRT can be placed close to the patient without obstructing the surgeon’s or IR’s access.

Short-range Transmitters

The Short-Range Transmitter (SRT) provides a solution for the smaller difficult to access regions. The SRT may be mounted on imaging devices for a dynamic tracking solution.


3D Guidance Features

  • Accurate, dynamic tracking of sensor position and orientation, with fast update rates
  • Miniaturized passive sensors as small as 0.56 mm with full six degrees of freedom tracking
  • High metal immunity with no distortion from non-magnetic materials
  • The driveBAY electronics unit provides a compact form factor that fits into the drive bay of your PC
  • Optimal tracking volume that supports numerous interventional and therapy applications
  • Two transmitter designs available (mid-range and short-range)

3D Guidance Sensors

6DOF Sensors

The 6DOF sensors come in a variety of sizes including the general-purpose reference sensor that consists of an 8 mm square cross-section down to 0.56 mm diameter cylindrical sensor for use in the smallest tools.


Model 55

  • Sensor OD = 0.56 mm Max
  • Cable OD = 3.8 mm
  • Sensor Length = 300 mm
  • Cable length = 2.2 m

Model 90

  • Sensor OD = 0.9 mm
  • Cable OD = 0.6 mm
  • Sensor Length = 7.25 mm
  • Cable length = 3.3 m

Model 130

  • Sensor OD = 1.5 mm
  • Cable OD = 1.2 mm
  • Sensor Length = 7.7 mm
  • Cable length = 3.3 m

Model 180

  • Sensor OD = 2.0 mm
  • Cable OD = 1.2 mm
  • Sensor Length = 9.9 mm
  • Cable length = 3.3 m

Model 800

  • Sensor OD = 7.9 mm
  • Cable OD = 3.8 mm
  • Sensor Length = 19.8 mm
  • Cable length = 3.3 m

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