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Keywords:
Radioprotection / Radiation dose, CT, Cone beam CT, Comparative studies, Dosimetric comparison
Authors:
J. Neubauer1, C. Neubauer1, M. Langer1, E. Kotter1, J. M. Voigt2, M. Fiebich2; 1Freiburg/DE, 2Gießen/DE
DOI:
10.1594/ecr2015/C-1457
Conclusion
We found both MDCT and FPCT to produce good image quality in wrist imaging with lower dose settings than the default settings.
Although FPCT needed less radiation dose in default settings,
we found the lowest dose setting with a good overall image quality to be achieved by the MDCT.
Thus,
adjusting CT protocols for wrist imaging seems advisable for both modalities with the MDCT having an even higher potential for dose reduction.
In the last decade several studies suggested that small compact FPCTs would administer lower radiation doses than MDCTs [2–4].
These investigations did not correlate the radiation dose with the image quality and therefore could not properly adjust MDCT protocols.
If the image quality is investigated under equivalent dose conditions,
the MDCT is reported to show better results for contrast resolution [1,
5].
Consistent to our findings Hofmann et al.
showed in a study on orthodontic examinations that under optimized conditions clinically useful images could be performed by MDCT with even lower radiation doses than by different FPCTs [6].
Further investigations are needed to confirm these preclinical results.