Dose development in sinonasal imaging over the last decade – a retrospective patient study

Head & Face Medicine

Table 3 Overview on CTDI_Vol and DLP values for each scanning protocol for preoperative assessment

	CTDI_Vol		DLP
Scanning protocol	Mean (mGy)	Reduction in % compared to DS 64 / FBP	Mean ± Std. Dev. (mGy x cm)			Reduction in % compared to DS 64 / FBP
DS 64 / FBP	4.6	-	65	±	10	-
DS 64 / 1st Gen.	4.6	0	67	±	25	+ 3
DS 64 / 2nd Gen.	4.6	+ 1	69	±	17	+ 7
SS 128 / FBP	2.6	43	35	±	4	46
SS 128 / 2nd Gen.	2.2	53	33	±	8	49
DS 192 / 3rd Gen. + ATCM	9.2	+ 102	169	±	57	+ 162
DS 192 / 3rd Gen. - ATCM	2.1	54	41	±	14	36
DS 192 / 3rd Gen. 2022	2.1	54	43	±	22	33

Mean value (± standard deviation) of CTDI_Vol and DLP values of protocols used for preoperative assessment in the past 12 years. Additionally, the dose reduction in percent per scan protocol compared the DS 64 / FBP protocol is shown for the CTDI_Vol and DLP values. ATCM = automatic tube current modulation, CBCT = cone beam CT, CT = computed tomography, CTDI_Vol = computed tomography dose index, DLP = dose length product, FBP = filtered back projection, Gen. = generation.

ISSN: 1746-160X