Comparison of 640-slice Aquilon ONE CT scanner’s measured dosimetric parameters with ICRP dose reference levels for head, chest and abdominal CT examinations

Table 2 ICRP DRLs and measured dosimetric parameters for pediatric and adult CT head, chest and abdominal scans

Body Region	Patient category	CTDI_vol ± s.d (mGy)			DLP ± s.d. (mGy/cm)			p-value
Body Region	Patient category	ICRP DRL	Measured	Rel. dev. %	ICRP DRL	Measured	Rel. dev. %
Head	Pediatric	56.11	23.87 ± 10.18	−57.5	614.58	406.59 ± 10.18	−33.8	0.001
Head	Adult	60.00	63.29 ± 10.18	5.5	1050.00	1008.26 ± 10.18	−4.0	0.001
Chest	Pediatric	30.00	1.70 ± 10.18	−94.3	500.00	67.20 ± 10.18	−86.6	0.002
Chest	Adult	30.00	5.92 ± 10.18	−80.3	650.00	282.14 ± 10.18	−56.6	0.001
Abdomen	Pediatric	30.00	2.70 ± 10.18	−90.0	375.00	93.00 ± 10.18	−75.2	0.001
Abdomen	Adult	35.00	6.79 ± 10.18	−80.6	780.00	353.48 ± 10.18	−54.7	0.001

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