Remotely adjustable movable laser bridge for patient positioning in an MRI environment

Key figures
mm projection precision
mm projection precision
mm line width
mm line width
laser colors
laser colors
mm travel range
mm travel range

DORADOnova MR3T supports your (MR-only) workflow

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MR-only marking by means of DORADOnova MR3T


Simply adjustable

With the remote control all lasers can be easily selected and finely adjusted in all degrees of freedom (parallel shift, tilt, rotation and focus).

Consistently precise

The positioning accuracy of ± 0.1 mm and the projection precision of ± 0.5 mm at a distance of 4 m is measured for every rail during production. The measurement data are delivered with the system. 


Certified by an independent testing facility DORADOnova MR3T is the world’s only laser systems for patient alignment which fulfill MRI conditional requirements up to 3 Tesla.

Comfortably laser steering

Fast and precise operation due to the high resolution capacitive touch screen mounted directly on the DORADOnova MR3T. This shortens distances and enables better patient interaction.

Fits your workflow

Optimal for image registration with CT images so that no or less application of rigid and deformable image registration algorithms are necessary. Perfect for the MR-only workflow, as all patient marking workflows can be applied at the MRI.


The failsafe system verifies the positioning of the laser modules by two technically independent procedures before the lasers are switched on.

Application examples

Technical data

Dimensions customized Width: 2594-5000 x 2300-2800 mm Height: 102.1–196.9 × 90.6–110.2″
Weight approx. 100 kg
Laser color (typical wave length) red (638 nm), green (520 nm), blue (450 nm)
Laser class 2
Laser adjustment Remote controlled
Line width up to 4 m distance < 0.5 mm (blue), < 1 mm (red, green)
Line length at 3 m distance > 3 m
Positioning accuracy +/- 0.1 mm
Projection precision +/- 0.5 mm at a projection distance of 4 m
Travel range 700 mm
Travel speed up to 200 mm/s
Power supply 100 … 240 V AC, 50 … 60 Hz
Scope of delivery Laser system, CARINAnav laser control, remote control, cable set


How long is the laser line?

The length of the laser line is equal to the distance between laser source and patient. Therefore, for example, the laser line is only one meter long at a distance of one meter, but 4 meters long at a distance of 4 meters. 

How can LAP ensure projection precision?

The projection precision is influenced by the straightness of the rail and the temperature. During production, the projection accuracy of each rail is checked twice and documented in the Delivery Report. If it is not within the tolerance, the rail is not used. Only laser devices that pass these stringent checks will be used.

Which color should I choose?

Historically, red was the only laser color that could be technically realized for a long time. Today, the laser colors red, green and blue can also be offered. Here, the human eye perceives green as a sharper line than red and blue sharper than green.  Another aspect you should consider is the skin color of your patients. Overall, after 20 years of experience, it can be stated that the green laser color is the most popular.

Do I get a quality report?

Yes, during production a Delivery Report with all the quality parameters is created for each laser system, which is handed over to our customers after installation.

How can I combine the imaging modalities CT and MRI for radiation therapy?

The DORADOnova laser system can be used to project reference or target coordinates on the patient's skin, which are then marked by clinical staff. These coordinates serve as the basis for patient planning and are used to position the patient on the MRI: Using the DORADOnova MR3T Laser System, the same coordinates that were used on the CT are projected and the patient is aligned with them. 
This lays the foundation for reproducible positioning of your patients throughout the different imaging modalities.

Further resources

Find out how lasers are used for MR-only workflow and quality assurance for MRI in the report of the AAPM Radiation Therapy Committee Task Group No. 284.

This webinar focuses on how lasers make the difference in MRI in RT. Find out more about workflows in MR and MRI solutions from LAP.

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