Table 5.

Summary of published data on PET/CT parameters and patient effective dose for ¹⁸FDG whole body oncological studies

Reference	Scan length as per this study	Study from	Study to	Comment or CT description	Tube current mAs or mA and s	AEC	CTDIvol (mGy)	DLP (mGy cm)	ED_CT (mSv)	Activity (MBq)	ED_PET (mSv)
[7]	Torso	Base of the skull	Upper-thigh	Impact of AEC	100–300 mA and 0.5 s	Yes	–	–	7.2	370	6.23
					250 mA and 0.5 s	No			18.6
[36]	Torso	Base of the skull	Upper-thigh	TAI patients	112 mAs	Yes	–	–	14.4 ± 2.8	312 ± 43	4.4 ± 0.6
[22]	Torso	Base of the skull	Mid-thighs	Standard CT	39 mAs	Yes	–	438 ± 85	5.0 ± 1.0	450 ± 32	9.0 ± 1.6
				Diagnostic CT	120 mAs			1050 ± 342	15.4 ± 5.0
[30]	H&Torso	Head	Mid-thighs	Initial CT	–	Yes	6.4 ± 2.4	537 ± 222	8.1 ± 3.3	–	–
				Optimized CT			4.3 ± 1.6	368 ± 145	5.5 ± 2.1
[20]	H&Torso	Top of the skull	Mid-thighs	Most frequent CT	110 mA and 0.8 s	–	4.3	434	7.5	336 ± 49	5.6
				Special CT	250 mA and 0.5 s		6.0	616	10.95
				Special CT	300 mA and 0.5 s		7.2	732	13.2
[8]	H&Torso	Vertex	Mid-thighs	–	80 mAs	Yes	–	–	8.2	304 ± 45	6.3 ± 1.2
[21]	H&Torso	Head	Pelvis	High-quality CT	80 mA and 0.8 s	–	–	–	19.0	–	–
				High-speed CT					8.8
[9]	H&Torso	Head	Mid-thighs	Center 1	84 mA and 0.5 s	Yes	5.9 ± 1	591 ± 130	7. 8	258 ± 56	4.9
				Center 2	–	Yes	5.4 ± 2	575 ± 248	7.7	313 ± 73	5.9
	WB	Head	Feet	Center 1	89 mA & 0.5 s	Yes	6.2 ± 1.4	1112 ± 285	9.4	258 ± 56	4.9
				Center 2	–	Yes	3.7 ± 1	620 ± 166	5.9	313 ± 73	5.9
[23]	–	–	Symphysis	Low-dose CT	–	–	1–2.9	–	1.3–4.5	300–370	5.7–7
				Contrast-enhanced CT			9.5–14.1	–	14.1–18.6
This study	Torso	Base of the skull	Mid-thighs	–	120 mAs	Yes	6.3	557	10.3	323	6.1 ± 1.2
	HNT	Vertex	Mid-thighs	–			4.9 + 5.4	187 + 429	9.7 ± 2.2	299 ± 43	5.7 ± 0.8
	WB	Head	Feet	–			7.9 + 3.3	776 + 307	14.0 ± 4.9	321 ± 71	6.1 ± 1.3