Fig. 2
From: Dose development in sinonasal imaging over the last decade – a retrospective patient study
Radiation dose of CT-scans used for diagnosing chronic sinusitis in the past 12 years. Bar chart and Box plot of CTDIVol (A) and DLP (B) of protocols (x-scale) used for diagnosing chronic sinusitis. The last bar chart and box plot shows dose values for CBCT. Horizontal lines within boxplots represent medians. Upper and lower whiskers correspond to 1.5 x of the interquartile range. Black dots represent outliers. The protocol name consists out of the Scanner (DS 64, SS 128, DS 192) and the reconstruction method (FBP, 1st, 2nd and 3rd Generation of iterative reconstruction). Since 3rd Generation iterative reconstruction was used for all DS 192 protocols, additional information, such as with or without automatic tube current modulation or the year of acquisition, was added. The short dash, medium dash, and solid horizontal line show the reference values given by the authorities for this CT examination at the time. ATCM = automatic tube current modulation, CBCT = cone beam CT, CT = computed tomography, CTDIVol = computed tomography dose index, DLP = dose length product, FBP = filtered back projection, Gen. = generation