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Table 3 Measured ion chamber readings (mR) representing gonadal exposure from a pelvic CT scan

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

Scan #

No Shield

Large Shield (650 cm 3 )

Medium Shield (450 cm 3 )

Small Shield (150 cm 3 )

1

4820

138.2

171.4

265.4

2

4800

138.3

  

3

4800

138.9

  

4

4810

136.4

  

5

4800

134.2

  

Average +/- std.dev.

4806 +/- 8.9

137.2 +/- 1.9

  

% Reduction

 

97%

96%

94%

Reduction Factor

 

35

28

18

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BMC Medical Imaging

ISSN: 1471-2342

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