Radbook 2016

Siemens DSCT scanners allow physicians to perform diagnostic imaging of the thorax, the coronary vessels, and the entire aorta withonescanandasingleadministrationofcontrastmedium.Flash mode and Turbo Flash mode enable exceptional imaging quality at lower radiation doses than are required using conventional CT scanners. In the case of pulmonary embolisms in particular, DSCT results in a faster diagnosis and treatment start, since it displays not only the cause – the embolus or several smaller emboli – but also their effect on perfusion in the lungs. In pediatric cases, DSCT has improved the diagnosis of small and distal pulmonary embolisms thanks to its increased specificity and sensitivity.[*] Dynamic perfusion at dose values of conventional scans In oncology, therapies can be individually tailored to the particular patient.When it comes to the diagnosis, treatment, and monitoring of tumors – such as in the liver and gastrointestinal tract – individ- ualized therapies demand the most detailed information available on parameters such as blood flow, blood volume, flow time, and permeability. With SOMATOM Force, perfusion scans are possible with doses that are no higher than those used for conventional multiphase examinations of the abdomen. The Stellar Infinity detector and the new“Adaptive Dose Shield”dose protection enable up to a 50 per- cent reduction in the radiation dose for 4D imaging in comparison with other modern CT models – from 30–40 down to 12–15 milli- sievert. SOMATOM Force achieves scan coverage of up to 22 centi- meters, enabling the imaging of entire organs. [*] Functional information on the efficiency of the heart muscle Coronary CT angiography (CCTA) is a key non-invasive method for detecting coronary artery diseases. If a patient has moderate lesions, however, information about the hemodynamic significance of cor- onary stenoses is important in deciding whether they would bene- fit from myocardial revascularization. By performing a CT perfusion examination of the myocardium alongside CCTA, a cardiologist can gain information on blood flow and volume in the heart muscle, and can reliably distinguish between healthy and damaged heart muscle tissue. Following the administration of contrast medium, dynamic CT perfusion imaging acquires several datasets over a period of time in order to precisely determine myocardial perfusion; additional scans or hybrid imaging are then often unnecessary. Thanks to its high spatial and temporal resolution and large volume coverage, DSCT scanners from Siemens Healthcare is bring- ing dynamic CT perfusion to clinical routine – leading to improved diagnostic procedures and treatment of coronary lesions.[*] Dynamic perfusion imaging enables full organ coverage of the liver with a radiation dose compa- rable to a conventional multiphase examination delivering additional information about poten- tial tumors that might be relevant for therapy. The two left images reveal massive bilateral emboli. A 3D-based visualization of the same scan shows the aortic root, pulmonary trunk and coronary arteries and demonstrates an abnormal origin of the right coronary (on the right). Disclaimer The products/features (here mentioned) are not commercially available in all countries. Due to regulatory reasons their future availability cannot be guaran- teed. Further details are available from the local Siemens organizations. The statements by Siemens’customers described herein are based on results that were achieved in the customer’s unique setting. Since there is no“typical”hospital and many variables exist (e.g., hospital size, case mix, level of IT adoption) there can be no guarantee that other customers will achieve the same results * For a complete list of references, please visit the Siemens Healthcare website: http://health.siemens.com/CT_applications/YesDS/ Courtesy of University Medical Center Mannheim, Germany Courtesy of Radiology LMU, Campus Grosshadern, University Hospital Munich, Germany RADBOOK 2016 11 COMPUTED TOMOGRAPHY  ◼ RADBOOK 201611

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