American CIRS 008M MRI linear accelerator dynamic phantom
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Brief description:The CIRS 008M MRI linear accelerator dynamic phantom provides a way to evaluate MRI image quality and test tumor localization and motion capture devices. The phantom can be used to acquire moving or static target images for treatment planning and validation of gated or adaptive treatment delivery.
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Detailed introduction
American CIRS 008M MRI linear accelerator dynamic phantom
Introduction:
CIRS008MMRI linear accelerator dynamic phantomDesigned for end-to-end commissioning, machine QA of hybrid MRI-LINAC radiation therapy systems and validation of gated and adaptive treatment plans.
CIRS008MMRI linear accelerator dynamic phantomProvides a method to evaluate MRI image quality, test tumor localization and motion capture devices. The phantom can be used to acquire moving or static target images for treatment planning and validation of gated or adaptive treatment delivery.
The phantom, moving rod with target and extended rigid shaft connection has the MRI safety of a 1.5T magnet. The motor and motion controller electronics are kept a safe distance from the magnet to ensure MRI image quality. The MRI-LINAC dynamic phantom utilizes CIRS motion control software to provide accurate, repeatable 3D target motion.
The phantom body approaches the size and shape of an ordinary human body. It consists of a plastic housing with a cylindrical through hole to accommodate a moving rod with a simulated target. The housing is filled with a proprietary MRI signal-generating gel that allows for quick and easy phantom setup without liquid motion artifacts. The phantom body is suspended on a non-magnetic track, allowing coil positioning and phantom registration to the couch.
MRI image spatial distortion
MRI field uniformity
Laser coincides with ISO* center
The mobile insert with the simulated target is a sealed cylindrical rod filled with the same MRI signal-generating proprietary gel used in the phantom. Embedded MRI/CT targets are made of MRI gel and provide contrast relative to the background. The target can receive an ion chamber or other MRI-compatible dosimeter for treatment dose verification. For MRI/CT targets and MRI distortion grids, laser markings are machined on the outside of the MRI housing. To facilitate MRI/CT image fusion, there is a central fiducial aligned with external laser markers and at a known position relative to the 3D spatial distortion grid.
Characteristics of the American CIRS008MMRI linear accelerator dynamic phantom:
MRI-CT-LINAC compatible
3D target action
Gated and adaptive RT plan validation
End-to-end debugging
MRIQA
User-friendly motion controls
CIRSMRI-LINAC dynamic phantom target motion is independently controlled using CIRS motion control software. The graphical user interface provides an unlimited variety of actions while simplifying the operation of the CIRS008MMRI linear accelerator dynamic phantom to an intuitive level. Patient-specific motion profiles can be easily imported without the need for hardware adjustments or special programming skills.
American CIRS008MMRI linear accelerator dynamic phantomProduct specifications:
| product specifications | |
| motion controller | |
| overall size | 67 cm x 32 cm x 20 cm |
| total weight | 10 kg (22 lbs) |
| Amplitude,IS | ±25mm |
| Amplitude,AP/LR | ±10mm |
| Movement accuracy | ±0.1mm |
| cycle | 1 - ∞ (adjusted according to amplitude) |
| waveform | sin(t),1-2cos 4(t),1-2cos 6(t),sawtooth,shark |
| phantom body | |
| overall size | 25.6cm x 32cm x 20cm |
| total weight | 17 kg (38 lbs) |
| moving rod | |
| overall size | 32.7cmxØ6.3m |
| total weight | 1.5kg |
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