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  • 1.
    Leander, Peter
    et al.
    Lund University.
    Soderberg, Marcus
    Malmö University Hospital.
    Falt, Tobias
    Malmö University Hospital.
    Albertsson, Ida
    Linköping University, Department of Clinical and Experimental Medicine. Linköping University, Faculty of Health Sciences.
    Post-processing image filtration enabling dose reduction in standard abdominal CT2010In: RADIATION PROTECTION DOSIMETRY, ISSN 0144-8420, Vol. 139, no 1-3, p. 180-185Article in journal (Refereed)
    Abstract [en]

    The collective effective radiation dose to the population is increasing due to a higher use of computerised tomography. SharpView AB, Linkoping, Sweden, has developed an adaptive non-linear post-processing image filtration that may enable the use of lower radiation doses. The present study assessed if a lower dose with image filtration had the same image quality as a higher dose without the filter applied. All imaging was performed on a Siemens Somatom Sensation 16 CT. The parameters used were 120 kV and 200 mAs (40 patients) and 130 mAs without and with image filtering (40 patients), respectively. All studies were quantitatively evaluated for noise and image quality was assessed by visual grading characteristics (VGC) analysis. After image filtration, the noise in the processed images was lowered and the image quality was improved as shown by the VGC analysis. However, images using the higher dose were still ranked as the best in five out of eight criteria as shown by the VGC analysis. Image filtration enhances CT images significantly and further studies will show if 130 mAs with image filtration may be sufficient for clinically general abdominal CT.

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