Diagnostic Reference Levels based on clinical indications in computed tomography: a literature review

Insights into Imaging

Table 2 DRL_ci for head CT

Head CT
References	Acute stroke/post fossa		Acute stroke/cerebrum		Acute stroke/brain (whole)		Acute stroke/all sequences		Haemorrhage, aneurysms, arteriovenous malformations		Metastases, cerebral abscess		Trauma, sinusitis		Cholesteatoma		Sinusitis
	CTDI_vol (mGy)	DLP (mGy.cm)	CTDI_vol (mGy)	DLP (mGy.cm)	CTDI_vol (mGy)	DLP (mGy.cm)	CTDI_vol (mGy)	DLP (mGy.cm)	CTDI_vol (mGy)	DLP (mGy.cm)	CTDI_vol (mGy)	DLP (mGy.cm)	CTDI_vol (mGy)	DLP (mGy.cm)	CTDI_vol (mGy)	DLP (mGy.cm)	CTDI_vol (mGy)	DLP (mGy.cm)
Danish Health Authority (DK) 2015 [10]	–	–	–	–	–	–	–	–	58	930	–	–	–	–	–	–	–	–
Public Health England (UK) 2016 [11]	80	–	60	–	60	–	–	970	–	–	–	–	–	–	–	–	–	–
Schegerer et al. (DE) 2017 [12]	–	–	–	–	–	–	–	–	–	–	–	–	9	120	–	–	–	–
Treier et al. (CH) 2010 (22)	–	–	–	–	–	–	–	–	65	1000	65	1000	25	350	50	250	–	–
Van der Molen et al. (NL) 2013 [13]	–	–	–	–	–	–	–	–	–	936	–	–	–	133	–	–	–	–
Wachabauer et al. (AT) 2017 [14]	–	–	–	–	–	–	–	–	–	–	–	–	–	90	–	–	–	–
Geryes et al. (FR) 2019 [15]	–	–	–	–	–	–	–	–	44	1010	44	790	43	920	–	–	–	–
Ireland (IE) MERU 2017 [16]	26 (a)	469 (a)	–	–	–	–	–	–	–	–	–	–	62 (a)	918 (a)	–	–	21 (a)	183 (a)
Ireland (IE) MERU 2017 [16]	31 (b)	477 (b)	–	–	–	–	–	–	–	–	–	–	64 (b)	927 (b)	–	–	21 (b)	210 (b)
Norway (NO) 2018 [17]	–	–	–	–	–	–	60	950	60	950	–	–	–	–	–	–	–	–
Sweden (SE) 2019 [18]	–	–	–	–	–	–	60	1000	60	1000	–	–	60	1000	–	–	–	-