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Simultaneous MR and PET Imaging

By combining MRI’s excellent soft-tissue resolution with PET’s ability to detect cellular metabolism into one scan, MR-PET changes the way you see disease — so that you can effectively treat disease.

The Biograph mMR supports you in making a confident diagnosis across Oncology, Neurology and Cardiology. Because the hybrid scanner delivers more imaging data, it also provides greater potential for you to:

- Accurately detect and assess abnormalities throughout the body
- Quickly identify an illness and prescribe the right treatment
- Schedule fewer appointments since both scans are done at once
- Expose patients to less radiation compared to PET/CT scans

The Biograph mMR sets a new standard.

As the only system that can simultaneously acquire MR and PET data across the whole body, it is a tremendous leap forward in imaging capabilities, opening new doors in the diagnosis and understanding of disease. It fully supports you in detection and planning through monitoring and follow-up.


A comprehensive diagnostic picture in only one scan

The Biograph mMR shows MR and PET data in virtually seamless spatial alignment. The MR acquisition can be used to correct for motion-related effects in PET, greatly improving image quality.

Spatial alignment

  • Precise alignment of MR and PET through simultaneous acquisition
  • One frame of reference
  • Minimal motion artifacts
  • Exact spatial registration

Minimize the effects of motion

  • Brilliant MR and PET images are achieved through gating tools that freeze motion
  • MR-based PET gating information helps improve the quality of PET images
  • Important for imaging moving organs like the liver

Temporal co-registration

  • Help ensure a better understanding of physiologic processes
  • Capture metabolic and functional processes at the exact same time
  • Precisely and accurately assess disease

One exam. One room. One whole body solution

Siting one system instead of two can bring you significant practical benefits, while patients and staff alike enjoy shorter, more comprehensive exams.


One streamlined exam boosts your productivity

  • Shorten acquisition times
  • Two exams in one can help you achieve faster diagnoses
  • Get faster results for referring physicians

Shorter exams and low radiation exposure

  •  Position once for both MR and PET exams
  • No coil changing or repositioning thanks to Tim integrated coil technology
  • Reduce radiation exposure compared to other imaging modalities

Significant cost reduction

  • One room for MR and PET
  • One cooling system
  • One operator
  • Potential for more patients per day

Unlock medical applications and advanced research

Simultaneous, whole-body MR and PET creates a synergy far beyond the capabilities of each modality. Unlock new medical applications now and advance new areas of research in the future.

Be at the forefront of diagnostics and research with the Biograph mMR

  • Meet the needs of demanding high-end research
  • Realize synergies in routine clinical application
  • Get support in all aspects of MR and PET development
  • Experience new opportunities in funding, grants, donations and publishing
  • Attract the attention of referring physicians
  • Differentiate your facility in a powerful way

syngo.via and Biograph mMR are one

The Biograph mMR provides MR and PET data as one dataset — molecular MR acquisition data. Every Biograph mMR includes syngo.mMR General, the advanced visualization software application tool based on syngo.via. This allows you to fully utilize one dataset in your clinical environment.

The Biograph mMR is designed to give you the ability to meet the needs of demanding high-end research. The new system provides technology to tackle the toughest challenges the world of healthcare faces today.


Technical Details

As the world leader in both MRI and PET, Siemens possesses the engineering expertise to fully integrate the two. 

We've designed the first PET detectors that allow the integration of whole-body MR and PET - without compromising the performance of either modality 

Field strength 3 Tesla
Bore size 60 cm
System length

199 cm

System weight (in operation) 9.0 tons
Minimum room size 33 m2
RF Tim [102 x 18] [102 x 32]
Gradient strength MQ Gradients (45 mT/m @ 200 T/m/s)
Helium consumption Zero helium boil-off technology

Overview Technical Details 
Siemens' technologies
  • MR-compatible PET detectors: unique mMR block detector architecture includes integrated cooling features to provide optimal PET performance, as well as specialized shielding to virtually eliminate magnetic field interference in the PET data processing chain. 
  • Tim: optimized design for Biograph mMR and low-attenuation materials in Tim mMR coils and the mMR Tim Table minimize attenuation of the PET signals. This helps improve the consistency of PET data results. 


PET specifications 

The integrated state-of-the art PET detectors and detector cooling channels ensure optimal PET performance in Biograph mMR. 

PET Detectors
Crystal material LSO
Crystal element dimension

4 x 4 x 20 mm

NEMA 2007 - Transverse spatial resolution 9.0 tons
FWHM @ 1 cm 4.4 mm
Sensitivity 13.2 cps/kBq
Peak NEC rate (@ 21.8 kBq/cc) 175 kcps
Axial FoV for PET 258 mm

Magnet technology

Biograph mMR includes TrueForm Magnet Design. This results in better image quality by reducing the unusable edges in the images as well as better fat saturation for the whole area covered in a scan. 

Field strength 3 Tesla
Bore size 60 cm
Magnet length

163 cm

Helium consumption Zero helium boil-off technology

Gradient system

Biograph mMR includes an actively shielded whole-body gradient system for excellent spatial and temporal resolution, enabling patient-specific shimming. 

Gradients MQ Gradients: 45 mT/m
Slew rate MQ Gradients: 200 T/m/s

RF technology

Unique TrueForm RF design includes innovative techniques in the RF excitation hardware as well as new application and processing features. 

  • Uniform RF distribution in all body regions 
  • Optimized amplitude and phase transmission settings
  • Homogeneous B1 distribution 
Siting and installation

Siting one system instead of two allows a significant reduction in costs. 

Biograph mMR requires an installation space similar to a conventional 3T MRI system, thus making the most of your precious space. The benefits of Biograph mMR are obvious: one room, one cooling system, one operator. 

System length 199 cm
System weight (in operation) 9.0 tons
Minimum room size 33 m2

Contact us today to learn more about how we can help you solve your most pressing challenges.