MRI delivers excellent soft-tissue contrast as well as exact information on tumor extent and functional parameters, therefore it can add substantial value to radiotherapy. Between 2006 and 2013 its utilization in radiotherapy planning has increased from 6% to 21%.1
The MAGNETOM RT Pro edition for MAGNETOM Aera and Skyra is a comprehensive hardware and software package that helps advance your institution’s clinical capabilities and advance therapy outcomes by efficiently integrating this additional modality into existing processes.
Features & Benefits
The MAGNETOM RT Pro edition for MAGNETOM Aera and Skyra is designed for the dedicated needs of RT professionals. Equipped with a set of appropriate positioning support devices and dedicated protocols for RT, the MAGNETOM RT Pro edition helps to support therapy more precisely. Based on the core technologies Tim 4G and Dot, along with a comprehensive application portfolio, the MAGNETOM RT Pro edition is also the ideal choice for shared use between radiation oncology and radiology. For the MAGNETOM RT Pro edition, Siemens is also proposing quality assurance procedures. For smooth integration of MR images into your processes syngo.via RT Image Suite is the answer: A dedicated platform for image visualization and multi-modality contouring.
The top-of-the-line 70 cm Open Bore systems MAGNETOM Aera 1.5T and MAGNETOM Skyra 3T are the sound basis for MR in RT. Excellent patient access, a large Field of View, and trendsetting imaging applications enabled by the core technologies Tim 4G and Dot.
In combination with Tim Dockable Table
The optional Tim Dockable Table improves your process efficiency by enabling to prepare a patient outside the MR exam room. In a shared use model between radiation oncology and radiology this enables scanning within standard radiological timeslots and gives you the flexibility you need. The Tim 4G Spine coil that is integrated in the table can stay in place for RT set-ups and provides excellent SNR for brain, head & neck and body (pelvic) exams. The table holds up to 250 kg / 550 lb.
The MAGNETOM RT Pro edition is equipped with a set of additional Flex coils and a Body coil with an extended cable for more flexible positioning of the coils. This ensures excellent signal-to-noise ratio for brain, head & neck, and body (pelvic) imaging when immobilization devices are in place. For example, two flexible coils, one body coil with an extended cable and the table-integrated spine coil can be combined for head & neck exams at maximized SNR levels. Compared to a set-up with loop coils, flexible Tim 4G coils provide up to 17%3 more SNR.
Body 6 long
Body 18 long
RT positioning packages
To help ensure accurate and reproducible patient positioning, Siemens has partnered with CIVCO Medical Solutions and Orfit Industries, leading vendors for RT patient positioning solutions. Patients can be immobilized with thermoplastic masks to assure that imaging is performed in exactly the same position as for simulation and treatment.
The CIVCO Positioning Package includes Overlay with Prodigy Indexing and a Three-Pin Lok-Bar, a Head Bridge Base with one adjustable, two-part Head Bridge and two adjustable Body Bridges.
The Orfit Positioning Package includes a high precision base plate, a bi-lateral coil holder, a set of headrests, and a set of fixations.
The Qfix positioning package includes customizable patient positioning and immobilization devices for head and neck, beast, abdomen, prostate and other disease sites.
MR compatible Laser Bridge
The optional LAP DORADOnova MR3T Laser Bridge is an external laser system supporting virtual simulation at the MR with red or green laser lights. For high accuracy the marked position is shifted to the center of the scanner when using the RT Dot engine, so there is no need to use the system laser in addition.
Sequences & Applications
Siemens offers a variety of optional imaging applications which are tailored to address some of the main challenges in radiation oncology. Techniques like BLADE, Advanced WARP4, Siemens-unique FREEZEit and RESOLVE sequence help to maintain geometric integrity of the acquired data and to deal with typical sources of image artifacts, i.e. caused by metal. Furthermore, Siemens is offering dedicated image protocols for RT with the RT Dot engine.
RT Dot engine
Designed to enable consistent data acquisition and geometric integrity. The RT Dot engine supports the user in the acquisition of suitable RT planning images to be further processed in external RT applications. It contains features like automatic distortion correction, laser QA, and automatic axial image reconstruction.
More about applications
Instructions to perform quality assurance with the commercially available ACR MRI accreditation phantom
This document is a brief instruction on how the ACR (American College of Radiology) accreditation phantom can be used to evaluate geometric distortions in MRI for quality assurance (QA) purposes.
syngo.via RT Image Suite is a dedicated RT software solution, enabling advanced multi-modality image visualization and contouring. For monitoring and therapy control, syngo.MR OncoCare is the tool to visualize functional changes in order to evaluate treatment response.
MRI offers excellent soft-tissue contrast without dose, making it ideal for RT purposes where computed tomography (CT) information can be enriched with valuable MR information. Advanced applications and imaging sequences, such as RESOLVE and MR spectroscopy, provide additional pathology characterization. And with fast isotropic 3D sequences – like SPACE or VIBE – along with 3D distortion correction, you can achieve better anatomical correlation. Apply dose to the target, spare the organs at risk.
Brain and Head & Neck
Whether for brain lesions or intracranial metastases, MRI helps to provide vital clues for treatment planning of IMRT and Stereotactic Radiosurgery. Siemens provides dedicated RT protocols for Brain and Head & Neck exams with the RT Dot engine. These protocols are optimized for imaging in treatment position with the flexible Tim 4G coils.
In radiation therapy of the prostate, the volume of the organ is often overestimated when using CT only.5 With its excellent soft-tissue contrast, MRI can enable a more precise delineation of the prostate and organs at risk. With multi-parametric MRI (diffusion-weighted imaging and Spectroscopy) you can even see metabolically active regions of a tumor which helps to identify regions for dose escalation and enable tailored treatment planning to drive better therapeutic outcomes.6
With RESOLVE, diffusion-weighted imaging can be performed with significantly better lesion conspicuity and image quality7 and typical distortions are reduced by a factor of three.8 Therefore, RESOLVE is strongly suited for accurate target delineation.
The EMBRACE study has shown for cervical cancers treated with brachytherapy, that the ability of MRI to visualize and delineate soft tissue improves target coverage and normal tissue sparing:9 MRI used in brachytherapy of cervix carcinoma significantly improves target coverage and reduced organ-at-risk dose.
With fast isotropic 3D sequences – like SPACE or VIBE – along with 3D distortion correction, you can acquire excellent planning data for the therapy process. Various contrasts for reliable 3D planning in brachytherapy, e.g. T1, T2, and PD are available.
MAGNETOM Aera and MAGNETOM Skyra are MR systems that can meet the needs of high-precision radiation therapy. Excellent image quality and speed are possible with its Tim 4G technology combined with leading applications. Their 70 cm Open Bore can fit a variety of immobilization devices.
Components of MAGNETOM RT Pro edition
Tim 4G coils
Tim Dockable Table
RT Positioning Package
External laser systems
recommended for virtual simulation
Tim 4G coil arrangements for radiation therapy imaging
Tim 4G coils
Alternative / Option
Two Flex 4 (Small/Large)
Head coil mounts
One Flex 4 (Small/Large)
Head & Neck
Two Flex 4 (Small/Large)
Head coil mounts
One Flex 4 (Small/Large)
Abdominal / Pelvic
Body 18 or Body 6 for MAGNETOM Aera, Tim [204x24]
Body coil mounts
A second Body 18 can