Radiation dose reduction at a price: the effectiveness of a male gonadal shield during helical CT scans

BMC Medical Imaging

Table 4 Comparison of literature reports and present study for scattered dose reduction with the use of gonadal shields during abdominal CT scans (with the testes not in the direct beam)

Study	Study Type	Scanning Protocol	Testicular Dose (mGy)		% Reduction
			Without Shield	With Shield
Hidajat et al. 1996 [19]	Phantom, 1 mm capsule	Single-slice sequential, 10 mm slice, 250 mAs/slice, 120 kV	1.46	0.07	95
Price et al. 1995 [18]	Phantom, 1 mm wrap-around lead rubber	Single-slice spiral, 10 mm slice, 220 mA, 120 kV	0.82¹	0.19¹	77
Hohl et al. 2005 [7]	Patient, 1 mm capsule	16-slice spiral, 16 × 1.5 mm collimation,150 mAs_eff,120 kV	2.40	0.32	87
Present study	Phantom, 1 mm wrap-around canvas	16-slice spiral, 16 × 1.25 mm collimation 194 mAs_eff, 120 kV	0.62	0.26	58

¹Values initially reported in mSv and were converted to mGy for comparison, assuming 1 mSv = 1 mGy.

ISSN: 1471-2342