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Table 1 Comparison of the relative emitted dose for all of the standard CT images generated in Figure 6 compared to the manual CT Brush play of Figure 3 Right

From: CT brush and CancerZap!: two video games for computed tomography dose minimization

R = # of views per star

Angle between rays

Total # of unique rays T (Eq. 5 )

Effective # of rays E (Eq. 8 )

Manual/ T

Manual/ E

(%)

(%)

manual play

-

2,126

-

-

-

5

36°

262,400

1,618

0.81

131.4

6

30°

327,936

1,913

0.65

111.1

9

20°

524,544

2,930

0.41

72.6

18

10°

1,114,368

5,861

0.19

36.3

36

2,294,016

11,747

0.093

18.1

72

2.5°

4,653,312

23,606

0.046

9.0

180

11,731,200

58,771

0.018

3.6

  1. All of these angles have irrational tangents. The stars used here all include the 0° ray, whose tangent is rational, so that Equation 5 is used for T.