The new version of the SOMATOM Definition Edge also can simplify the radiology workflow considerably. Unlike other single-source dual energy CT imaging, the Edge's acquired dual energy datasets are preprocessed intelligently directly after acquisition. The datasets also can be sent automatically by the Edge to the picture archiving and communication system (PACS) with the aid of Siemens' new Fast DE Results²[<00B2>][<00B2>] technology.
Siemens employs a unique and efficient approach to acquiring TwinBeam Dual Energy image data, providing dose optimized protection. In addition, dose-reducing Siemens technologies can be used in combination with TwinBeam Dual Energy on the new version of the SOMATOM Definition Edge CT system, including ADMIRE (Advanced Modeled Iterative Reconstruction),³the model-based iterative reconstruction procedure that Siemens released recently on the SOMATOM Force CT system. ADMIRE's algorithms can reduce X-ray doses even further, achieving excellent image resolution and reduced pixel noise even at low doses.
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Iterative metal artifact reduction
To further improve not only the quality of dual energy examinations but also conventional CT scans using the SOMATOM Definition Edge, Siemens is introducing iMAR4 - a new iterative algorithm for metal artifact reduction. With iMAR5, metal artifacts can be reduced. Installed SOMATOM Definition Edge and SOMATOM Definition AS+ CT scanners can be retrofitted with TwinBeam technology, iMAR and ADMIRE (in combination with the Stellar detector), enabling Siemens to deliver a complete solution that exceeds the expectations for low-dose high-quality CT imaging.
¹ TwinBeam Dual Energy is pending 510(k) clearance and is not yet commercially available in the United States
² Fast DE Results is pending 510(k) clearance and is not yet commercially available in the United States
³ In clinical practice, the use of ADMIRE may reduce CT patient dose depending on the clinical task, patient size, anatomical location, and clinical practice. A consultation with a radiologist and a physicist should be made to determine the appropriate dose to obtain diagnostic image quality for the particular clinical task.
4 iMAR is designed to yield images with a reduced level of metal artifacts compared to conventional reconstruction if the underlying CT data is distorted by metal being presented in the scanned object. The exact amount of metal artifact reduction and the corresponding improvement in image quality achievable depends on a number of factors, including composition and size of the metal part within the object, the patient size, anatomical location, and clinical practice. It is recommended to perform iMAR reconstruction in addition to conventional reconstruction.
