The iterative algorithm for metal artifact reduction, iMAR1, allows artifacts–often caused by implants, artificial joints, or pacemakers–to be significantly reduced thus improving, the image quality of your CT and attenuation-corrected PET and SPECT images. The ability to see more detail in these types of challenging exams leads to more efficient image interpretation and accurate quantification.
Key benefits of iMAR
- Enhance PET and SPECT image quality when metal is present by improving the attenuation correction (AC), as compared to non-iMAR CT images used for AC
- Improve process efficiency with an algorithm that can handle different metal implants in a smooth workflow
- Leverage your ability to address more challenging cases (e.g. dental fillings, pacemakers, and extremity
- implants) and better satisfy your referral base by delivering outstanding image quality
- Use iMAR with conventional reconstruction methods or iterative reconstruction, such as SAFIRE
- Enhance xSPECT Bone™ image quality by improving the bone zone maps for advanced reconstruction
More accurate quantification
In this study, iMAR reduced the ipsilateral and contralateral metal artifacts and diminished artifacts impacting SPECT AC and xSPECT Quant™ values, resulted in more accurate quantification. Additionally, iMAR xSPECT Bone images clearly demonstrated focal uptake in the mandible, showing suspected osteomyelitis.
Decrease metal artifacts in staging
In this example Biograph™ Horizon PET/CT with iMAR decreased metal artifacts in staging head and neck disease. iMAR allowed for the correction of obscuring artifacts from metal implants and was used for the reconstruction of AC PET images.
1The amount of metal artifact reduction and corresponding improvement in image quality depends on a number of factors including: composition and size of the metal object, patient size, anatomical location and clinical practice. It is recommended to perform reconstruction with iMAR enabled in addition to conventional reconstruction without iMAR.
2Biograph Vision is not commercially available in all countries. Due to regulatory reasons, its future availability cannot be guaranteed. Please contact your local Siemens organization for further details.
* Images displayed in the page header are courtesy of University Radiology Associates, Syracuse, NY, USA.