Table 1.
Tin-filtered CT protocol.
Fig 1.
Ultra-low-dose CT-images of paranasal sinus.
Axial (A) and coronal (B) reformations of 100 kV tin-filtered ultra-low-dose CT of the paranasal sinus of a 63-year-old male (DLP 2.1 mGycm; effective dose 0.012 mSv). Despite the very low dose, the diagnosis of florid sinusitis is easily established. In a 19-year-old male (axial C, coronal D), sinusitis was sufficiently excluded (DLP 1.8 mGycm; effective dose 0.010 mSv). The general image quality in both patients was rated as “moderate” by both readers.
Table 2.
Subjective image quality.
Fig 2.
Examples of different image quality scores.
Axial bony reformations show good (A), moderate (B) and fair (C) distinction of the individual mastoid cells. Axial soft-tissue reconstructions show moderate (D), fair (E) and non-diagnostic (F) image quality regarding the differentiation of orbital structures.