Technologist Radiation Exposure in Routine Clinical Practice with 18F-FDG PET

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FIGURE 1.
Schematic representation of our homemade drawing device. (A) Global view of device. (B) Positioning of ¹⁸F-FDG vial in hole of dosimeter. (C) Syringe filling. (D) Shielded semiautomated injector.

TABLE 1

Mean ± SD (n = 50) Whole-Body Doses During Steps 3, 4, and 5, as Estimated by ED and TLD Worn in Upper Left Pocket of Overalls

Step	Step duration (s)	Activity (MBq)	Effective dose (μSv) measured with:			Effective dose per MBq injected (nSv) measured with:
Step	Step duration (s)	Activity (MBq)				TLD	ED	TLD	ED
3	19.1 ± 7.3	345 ± 71	0.76 ± 0.87	0.88 ± 0.68	2.03 ± 1.63	3.39 ± 2.5
4	108.9 ± 47	345 ± 71	1.08 ± 1.6	0.81 ± 1	4.53 ± 6.9	3.26 ± 4.1
5	157.4 ± 65	345 ± 71	0.72 ± 1.1	0.76 ± 1.1	3.01 ± 5.1	2.99 ± 4.2

TABLE 2

Mean ± SD (n = 50) Finger Irradiation During First 3 Steps of Manipulation of ¹⁸F-FDG Multidose Vials

Step	Step duration (s)	Activity (MBq)	Finger dose (μSv)			Finger dose (μSv) per MBq injected
Step	Step duration (s)	Activity (MBq)				Left hand	Right hand	Left hand	Right hand
1	177 ± 111	3,240 ± 876	135.2 ± 19.2*	59.2 ± 53	0.041 ± 0.045	0.019 ± 0.015*
2	128.1 ± 98.7	345 ± 71	43.4 ± 70.8	211.3 ± 180^†	0.15 ± 0.22	0.76 ± 0.52
3	19.1 ± 13	345 ± 71	21.0 ± 19.1	25.7 ± 70	0.086 ± 0.048	0.10 ± 0.17

TABLE 3

Mean ± SD (n = 30) Finger Doses During First 2 Steps of Manipulation of ¹⁸F-FDG Monodose Vials

Step	Step duration (s)	Activity (MBq)	Finger dose (μSv)			Finger dose (μSv/h) per MBq injected
Step	Step duration (s)	Activity (MBq)				Left hand	Right hand	Left hand	Right hand
1	112.7 ± 41	405 ± 235	14.9 ± 20*	22.2 ± 45	0.039 ± 0.05	0.068 ± 0.17*
2	138.4 ± 40	302 ± 57	44.9 ± 39	110.2 ± 63^†	0.14 ± 0.11	0.37 ± 0.20

TABLE 5

Whole-Body and Finger Doses Related to Technical Problems Occurring Throughout ¹⁸F-FDG Manipulation

Incident	Increased duration (s)	ED whole body (μSv)	TLD whole body (μSv)	TLD right hand (μSv)	TLD left hand (μSv)	Activity (MBq)	n
Long transfer duration	63.6 ± 55*	2.50 ± 0.84*	3.51 ± 2.5*			318 ± 37*	8
Long syringe filling	660			1,183	424	222	1
Long injection duration	294	4	4			259	1
Long patient positioning duration	275	2.8	2.8			259	1