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Dose Reduction and Optimization in Computed Tomography of the Chest

  • Pierre Alain Gevenois
  • Denis Tack
Part of the Medical Radiology book series (MEDRAD)

Abstract

Even if the clinical benefit of multi-detector computed tomography (MDCT) of the chest is expected to be much higher than the potential risks from radiation, reduction and optimization of the radiation dose are highly recommended in accordance with the ALARA principle. As the chest is composed by organs and structures that are characterized by high differences in attenuation values with spontaneously high contrasts, it is well established that MDCT dose can be dramatically reduced. It has been indeed documented that in numerous clinical circumstances, radiation dose cannot be higher than 10 to 20% of the standard doses recommended by the scanner vendors (i.e. CTDIvol from 0.6 to 3 mGy, DLP from 30 to 120 mGy cm, E from 0.6 to 2.5 mSv as compared to 8–14 mSv). This is of particular concern in patients with long life expectancy and can be achieved by automatic exposure control in adjunction to either reduced tube current time product, reduced tube potential, or both. Newly developed dose reduction strategies, in particular iterative reconstructions will enable to obtain CT scans of high quality with a dose close of that delivered for plain film examinations.

Keywords

Chronic Obstructive Pulmonary Disease Compute Tomography Examination Bronchiolitis Obliterans Syndrome Pulmonary Emphysema Compute Tomography Pulmonary Angiography 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg  2011

Authors and Affiliations

  1. 1.Department of Radiology, Clinic of Chest Imaging, Hôpital ErasmeUniversité Libre de BruxellesBrusselsBelgium
  2. 2.Department of RadiologyRHMS Clinique Louis CatyBaudourBelgium

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