SOMATOM Definition Edge
Exceeding expectations with the Stellar detector
Lower signal, lower voltage, lower dose – the new Stellar detector boosts both patient outcome and risk reduction without any compromise in image quality and diagnostic reliability. Based on full electronic integration, Siemens’ exclusive TrueSignal technology significantly reduces noise and cross-talk. Instead of increasing dose, it makes more efficient use of the initially available quants per voxel. In addition, the Stellar detector provides a homogeneous slice profile with the same spatial resolution and SNR in the entire Field of View. And with no more need to switch bandwidth, it also benefits your patients with an extended dynamic range (HiDynamics), as the detector’s sensitivity for visualizing finer structures, especially for low kV datasets, is substantially increased.
Exceeding expectations with TwinBeam Dual Energy™
Introducing dose-efficient, comprehensive Dual Energy capabilities to virtually all patients, the new SOMATOM Definition Edge offers greater versatility than any other single source CT system. TwinBeam Dual Energy2 allows simultaneous acquisition of high and low kV datasets in a single CT scan, enabling high-contrast dynamic applications. To create two X-ray spectra simultaneously from one tube, the STRATON tube assembly system generates a pre-filtered X-ray beam, creating two different x-ray spectra before it reaches the patient. With all syngo.via applications now available for all single source DE cases, image acquisition is possible for all rotation times (up to 0.28 seconds), for the full field-of-view of 50 cm, and with the full number of projections for both spectra.
Exceeding expectations with the Right Dose
Innovation leader Siemens has been at the forefront of radiation reduction for decades – scans at sub-mSv doses have found their way into clinical routine. However, there isn’t one dose level that fits everyone. Every clinical question and every single patient require individual, meticulous dose management. Siemens’ comprehensive Combined Applications to Reduce Exposure (CARE), in combination with the STRATON tube and iterative reconstruction methods SAFIRE3 and ADMIRE4, enable low kV imaging down to 70 kV, enhance contrast media for advanced diagnostic information, and allow for substantial dose savings. In addition, the Adaptive Dose Shield eliminates overradiation pre- and post-spiral to the patient by dynamically moving shields into
place on the X-ray tube – blocking clinically irrelevant dose in every single spiral acquisition.
STRATON tube with z-Sharp
The STRATON™ tube with z-Sharp™ and its revolutionary design based on a direct anode cooling eliminate the need for heat storage and results in an unmatched compact design, allowing true temporal resolution of up to 150 ms, and a high isotropic resolution of 0.33 mm at any scan and rotation speed, and at any position within the scan field. This, for instance, allows to significantly reduce motion artifacts of the heart to perform accurate stenosis measurements or stent planning with outstanding precision. It facilitates fast whole body sub-mm imaging at highest pitch revealing outstanding details in long-range vascular studies or polytrauma patients.
SAFIRE (Sinogram Affirmed Iterative Reconstruction)
With SAFIRE Siemens has set the benchmark on low dose imaging with raw-data based iterative reconstruction. For the first time, raw data (or sinogram data) are actually being utilized in the iterative image improvement process. With this, SAFIRE can achieve a radiation dose reduction of up to 60%3. Or instead improve image quality (contrast, sharpness and noise).
SAFIRE in 3 steps:
- Multiple iterative loops performed in the raw-data domain correct geometrical imperfections and other artifacts
- Image reconstruction from the “corrected” raw-data
- Multiple iterative loops performed in the image domain remove image noise for a final and excellent image quality
ADMIRE (Advanced Modeled Iterative Reconstruction)
The lower the dose the more difficult it is to reconstruct images with an adequate image quality. This rule is common in CT. Now with Advanced Modeled Iterative Reconstruction ADMIRE, the newest generation in iterative reconstruction, clinicians and radiologists have access to enhanced image quality with a natural image impression and all clinical applications at a dose level that exceed all expectations. ADMIRE makes integrating iterative reconstruction into daily routine easy: Thick slices are reconstructed at a natural image impression, even from ultra-low dose scans. The reconstructed datasets can easily be stored in PACS or on film.
TwinBeam Dual Energy™
The new benchmark in single source dual energy – TwinBeam Dual Energy – allows for simultaneous acquisition of high and low kV datasets in a single CT scan, enabling high-contrast dynamic applications. Making dose-efficient, comprehensive Dual Energy capabilities routinely applicable to virtually all patients without compromising on image quality, the new SOMATOM Definition Edge offers greater versatility than any other single source CT system.
FAST CARE applications
The FAST CARE technology suite exceeds expectations in both of CT’s essential dimensions: Getting reliable results with as little radiation exposure as possible, and getting them fast.
FAST applications – our Fully Assisting Scanner Technologies –, make time-consuming and complex procedures faster and more intuitive. Scans will be more reproducible and less prone to errors. FAST Planning, for example, features immediate, organ-based setting of scan and recon ranges with no manual adjustments.
CARE technologies – our Combined Applications to Reduce Exposure –, offer excellent image quality at the right dose level, making CT scanning safer even for the most delicate patients, especially children. The CARE Dose Configurator, for example, allows you to better manage dosage with respect to the patient's anatomy when adjusting scan parameters.
Adaptive 4D Spiral Plus
The SOMATOM Definition Edge features Adaptive 4D Spiral Plus for long-range dynamic imaging of up to 48 cm. It exceeds expectations regarding the visualization and evaluation of the entire thoracic aorta in separate phases by capturing the arterial and venous phase in a single scan. So you’re able to not only delineate aneurysms and other vascular diseases, but also to identify the source of bleedings or assess venous thrombosis. It provides full organ coverage in 4D, be it stroke assessment of the brain or body perfusion studies – intelligent filtering with 4D Noise Reduction allows acquisition with up to 50 % lower dose.
The lower the signal, the higher the noise, the poorer the image quality?
Not true anymore. Based on the full electronic integration of the Stellar detector, TrueSignal technology significantly reduces electronic noise, especially in low kV images. The resulting signal-to-noise ratio is improved manyfold, and low-signal datasets benefit from increased sharpness and clarity, as the detector can now differentiate much better between the signal of individual voxels and the surrounding image data.
iMAR (iterative Metal Artifact Reduction)
Metal fillings and implants cause artifacts that often result in undiagnostic image quality, costing time for planning and potentially threatening therapy outcomes. iMAR2,5 is the industry’s most effective algorhythm focused on the removal of metal artifacts for enhanced diagnostic image quality. The minimal introduction of new interpolation artifacts, and the preservation of natural image impression and edge information will help streamline workflows and improve diagnostic confidence – with iMAR, surgical, prosthetic and dental fillings as well as pacemakers are not hiding insights anymore.
2This feature is 510(k) pending. Not available for sale in the U.S.
3In clinical practice, the use of SAFIRE 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. The following test method was used to determine a 54 to 60% dose reduction when using the SAFIRE reconstruction software. Noise, CT numbers, homogenity, low-contast resolution, and high contrast resolution were assessed in a Gammex 438 phantom. Low dose data reconstructed with SAFIRE showed the same image quality compared to full dose data based on this test. Data on file.
4In 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.
5iMAR 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 present 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.