Multi-Detector Row CT–Recent Developments, Radiation Dose and Dose Reduction Technologies

摘要: Clinical experience with the most recent 64-slice and 128-slice CT-systems indicates that a further increase of number detector rows will not automatically translate into improved clinical performance. Consequently, CT developments have focused on solving remaining limitations multi-detector row CT, such as limited potential to dynamically scan entire organs or insufficient temporal resolution for cardiac imaging. We discuss new system concepts CT-scanners area detectors large enough cover organs, dual-source considerably enhanced below 100 ms fast volume coverage by means high pitch scanning. Furthermore, we introduce explain basic radiation dose parameters in their measurement. briefly established techniques reduction, anatomical X-ray tube current modulation, organ-based ECG-controlled adaptation voltage patient's anatomy planned examination type, adjustable pre-patient collimators iterative reconstruction.