Dual Energy examinations provide answers for a wide range of diagnostic challenges. With Siemens SOMATOM CT scanners, you receive excellent Dual Energy images at equal, or often lower dose levels compared to conventional CT examinations. This makes Dual Energy a valid modality for many types of patients and a wide variety of clinical questions. That’s what True Dual Energy is about.
DEfinitely excellent images
Dual Energy from Siemens – True Dual Energy – offers crisp image quality with no extra radiation dose. In addition, Dual Energy CT offers you clinical information beyond morphology and allows you to highlight, characterize, quantify, and differentiate the material in your scans. Here are two examples:
Optimum Contrast is an intelligent method that changes the blending ratio of low and high energy data on a pixel-by-pixel basis, depending on the corresponding Hounsfield units (CT numbers). For higher CT numbers, which occur in regions of high iodine concentration, larger proportions of the image are taken from low tube energy data. As a result, areas of contrast enhancement are accentuated.
Monoenergetic imaging for reducing metal artifacts
With Monoenergetic imaging, metal artifacts can be reduced in both Single Source and Dual Source Dual Energy data. Select the energy level at which implants, clamps, or screws will have the smallest impact on image quality and get unsurpassed scan results.
DEfinitely the right dose
Only with Siemens' SOMATOM CT scanners, you get all advantages of True Dual Energy imaging with no dose penalty in either Single Source or Dual Source Dual Energy scans. With the latest dose reduction techniques, such as the Selective Photon Shield, ADMIRE, and CARE Dose4D, you will find the right dose level for generating valuable diagnostic information at the best possible image quality.
Following the ALARA principle, Siemens has introduced Dual Energy scan modes that utilize all available dose reduction techniques – such as CARE Dose4D for real-time mA modulation and SAFIRE/ADMIRE, to reduce the mA created by iterative reconstruction.
Dose reduction in Dual Spiral Dual Energy In the Dual Spiral Dual Energy scan mode, two consecutive spiral scans are performed at approximately one-half the dose so that you can be certain of compliance with the ALARA principle.
Dose reduction in TwinBeam Dual Energy:
TwinBeam Dual Energy consist of a regular 120 kV spectrum filtered by different material. As it is a normal spiral scan all dose reduction features can be applied, such as CareDose 4D and/or SAFIRE¹ /ADMIRE². The TwinBeam Dual Energy technique does not have any dose penalty, thus it always follows the ALARA principle.
Dose reduction in Dual Source Dual Energy
The launch of the SOMATOM Force with its Selective Photon Shield further established Dual Energy as a dose-neutral technology. The Selective Photon Shield filters out unnecessary photons from the high-energy X-ray tube. It permits the use of Dual Energy in daily practice at a dose comparable to a conventional 120-kV scan, with optimal spectra separation for excellent Dual Energy data quality.
Every patient is different. But True Dual Energy offers you dedicated protocols and evaluation software applications for virtually all patients and a wide range of clinical questions.
You can use Siemens’ Dual Energy with all Single Source CTs ranging from the SOMATOM Definition AS family and the SOMATOM Definition Edge. In addition, with the SOMATOM Definition Flash and the SOMATOM Force you get the outstanding Dual Source CT.
Compliance with the ALARA principle allows you to tap the advantages of Dual Energy with a very wide range of patients – including children as well as older, obese and fragile patients. On top of that, optimized scan protocols let you scan at low contrast agent dose and flow rate.
Wide range of applications for fast, definitive answers
Thanks to an ever-growing spectrum of applications, True Dual Energy helps you find fast and confident answers to a wide range of clinical questions – from lung nodes to brain hemorrhage, from perfusion defects in the heart to the evaluation of the malignancy of tumor lesions.
In 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.
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