The Lumina LU-400 is a reliable patient response system designed specifically for use in a MRI scanner. Lumina was developed to satisfy the requirements of both the clinical and research fields.
Guide Price: £2250
The Lumina LU-400 system has several components (see Installation). Here is a list of all the components that come with the system along with detailed information about the individual components.
The Lumina LU-400 system includes two fiber optic response pads, each with two colored push buttons. They are:
The pads come permanently connected to a unit called the OTEC (see below) via a 3 m (15 ft.) fiber optic cable. This cable is protected by a sturdy crush resistant cover.
The OTEC is the unit that converts the electrical signals to light. It is housed in an aluminum enclosure and is typically installed under the magnet.
The picture below shows the OTEC unit connected to the two response pads via the protected fiber optic cable.
See also Controller Features for detailed information about the controller's software capabilities.
The controller features a scanner trigger input. Physically, this is a BNC connector (75 ohm). The minimum width of a trigger pulse is 300 microseconds and there must be at least 25 milliseconds between pulses when in XID mode at 9600 baud. This can be 12 milliseconds for all other modes and baud rates.
In optical isolation mode, the trigger is guaranteed to be 'OFF' when the voltage is 1.1V or less, and 'ON' when the voltage is 1.5V or higher with an input current of 2mA. The input must be positive with respect to the enclosure's ground.
When not using the optical isolation, the trigger is guaranteed to be 'OFF' when the voltage is below 1.0V, and 'ON' when the voltage is 1.5V or higher with an input current of 2mA.
The Lumina system comes with the following additional components: