MAGNETOM RT Pro edition for MAGNETOM Vida
The time is now for MR in RT – with BioMatrix.
MRI offers excellent soft-tissue contrast without radiation dose, making it ideal for RT purposes where computed tomography (CT) information can be enriched with valuable MRI information. See how the MAGNETOM RT Pro edition for MAGNETOM Vida helps you expand your clinical capabilities in radiation therapy.
Whether for primary brain tumors or intracranial metastases, MRI helps provide vital imaging information for treatment planning of conventional and stereotactic radiotherapy. With the RT Dot Engine, we provide dedicated RT protocols for brain as well as head/ neck exams, allowing the visualization of the extent of the lesion and potential side effects such as edema, necrosis and more. The protocols are optimized for imaging in treatment position with the flexible Tim 4G coils to enable reliable simulation of the treatment situation. New ultra high-density coils such as the UltraFlex 18 improve SNR and allow for high spatial resolution in shorter exam times.
Head & Neck
In particular in the neck region, e.g. when aiming to treat head/neck tumors, MRI can provide unprecedented information about the soft tissue structures. In this region, however, image quality and spatial integrity of the acquired data can be compromised by spatial distortions and susceptibility effects. The new BioMatrix platform with unique techniques such as SliceAdjust helps achieve images of high spatial integrity and high signal homogeneity for RT planning purposes.
In radiation therapy of the prostate, the volume of the organ is often overestimated when using CT only.1 MRI delivers excellent soft-tissue contrast and 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 could help physicians to identify regions for dose escalation and enable tailored treatment planning to drive better therapeutic outcomes.2
With RESOLVE, diffusion-weighted imaging can be performed with significantly better lesion conspicuity and image quality3 and typical distortions are reduced by a factor of three.4 Therefore, it is the DWI sequence of choice for accurate target delineation.5
For cervical cancers treated with brachytherapy, the EMBRACE study has shown that the ability of MRI to visualize and delineate soft tissue improves target coverage and spares normal tissue.6 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.
Liver and Abdomen
Abdominal MRI typically requires multiple, subsequent long breath-holds to acquire data with the limitation, that no information about the dynamic movement of organs at risk at well as targeted lesions can be derived.
With novel compressed sensing techniques, such as GRASP-VIBE7, this limitation can be overcome in the future: Compressed Sensing GRASP-VIBE allows the acquisition of dynamic contrast enhanced MRI images in the abdomen in free breathing, providing viable information about the lesion characteristics. Furthermore, the acquired data contains 3D information about the movement of structures during the breathing cycle which might be used for more precise targeting and better sparing of moving organs at risk in the future.
1Van Lin et al. IJROBP 2006;65:291–303
2Kuban et al. IJROBP 2011;79:1310-1317
3Thian et al. Academic Radiology, 2014:21(4)
4Foltz, et al. IJRO 2013
5Liney et al. MAGNETOM Flash 2014:59-13-17
6Pötter R., Radiother Oncol. 2011;100(1):116–123
7Compressed Sensing GRASP-VIBE is not for sale in the U.S. Its future availability cannot be guaranteed.