QUASAR^TM MRI^4D Motion Phantom

Workflow Efficiency

Compact, integrated phantom design along with easy-to-use motion software saves time and increases operational efficiency by reducing or eliminating the need for complex or tedious assembly before and after operation. Superior imaging contrast provides easy target detection, which simplifies testing setup while maximizing accuracy.

Testing Versatility

Fillable components allow complete customization of contrast media, enabling improved visualization of desired structures. Configurable and interchangeable dosimetry inserts increase the functionality of the MRI⁴ᴰ. With the flexibility of choosing motion location and phantom orientation, the MRI⁴ᴰ is able to fulfill a physicist’s most demanding QA needs.

System Compatibility

Configurable contents within the body oval and inserts create utility within MR, CT and PET-based systems. MRI⁴ᴰ can perform motion QA across all platforms, providing a comprehensive end-to-end validation of treatment protocols. Use the MRI⁴ᴰ with confidence on all of your radiation therapy treatment planning and delivery systems.

Latency Tools

MRI⁴ᴰ provides analog input and output connectivity to provide real-time latency statistics without the use of an external oscilloscope. The user can select beam on/off triggering points within the software to quantify the treatment system’s total latency values. Intuitive target delineation and real-time latency reporting increases the MRI⁴ᴰ's ease of use.

Ultra-Low Latency Motion

The MRI⁴ᴰ features an ultra-low latency controller (500µs), which does not contribute significant phantom latency to the motion management system analysis. An ultra-low latency phantom is critical for accurate latency measurements and instilling confidence that your QA process has provided you with the most accurate and precise information.

Complex Motion

Programmable 3D target motion provides in-depth QA of MRgRT gating and tracking systems. Users have the choice to set the complexity of motion with our intuitive Respiratory Motion Software. Test the limits of motion management systems by delivering clinically relevant and demanding motion sequences with the MRI⁴ᴰ.

Customizable Waveforms

In addition to an extensive library of pre-loaded waveforms, the Respiratory Motion QA Software enables the import of acquired waveforms from a number of respiratory gating and motion tracking systems. The waveforms are completely customizable, improving the user experience when modifying waveform patterns to achieve the desired testing protocol.

Latency Data Reporting

A new generation of MR-guided radiotherapy systems requires detailed reporting of their system latency. The MRI⁴ᴰ is equipped for current and future testing capabilities needed for gating and tracking techniques. Using the advanced latency reporting capabilities, physicists can improve the accuracy and confidence of their MRgRT delivery.

Hollow acrylic insert

Hollow Acrylic Insert: Item #500-3605

Every MRI4D Motion Phantom includes two Hollow Acrylic Inserts, each featuring a 30mm ID fillable spherical target with stem and two seal-lids (one plain, and one with central and offset mounting holes). Additional Hollow Acrylic Inserts (#500-3605) and Fillable Spherical Targets (#500-3606) are available for purchase separately.

Find more information in the technical specifications sheet.

Ion chamber holders

Expand the capabilities of the Hollow Acrylic Insert with an MRI4D Ion Chamber Holder; available in central and 15mm offset configurations for complex 3D motion testing. Both Ion Chamber Holders include a 30mm OD solid contouring sphere with 5mm isocenter locating groove, and a 30mm ID fillable spherical tracking target. 

Options include a Solid Contouring Cuboid (#500-3608) and an MV Imaging Ceramic Sleeve (#500-3617). (Ion chamber type to be specified at time of ordering — major suppliers available upon request.)

Find more information in the technical specifications sheet.

Film Cassette Insert

The MRI4D Film Cassette Insert (Item #500-3607) accommodates one layer of EBT3 film with dimensions of 70mm x 175mm. The convenient, hinged cassette features indentation structures to provide film reference marks and is designed to slide into the insert body without affecting signal-generating fluid levels. The insert body features a 30mm OD solid spherical target with incorporated contouring features to enable MR/MV tracking. A threaded hole, located in the insert cap, allows the attachment of a 30mm fillable spherical target for additional tracking capabilities.

Find more information in the technical specifications sheet.