Skip to main content

Table 4 Evaluation of contrast-noise-ratio (CNR) with Catphan sensitometry module*

From: Implementation and experimental evaluation of Mega-voltage fan-beam CT using a linear accelerator

 

Dose level

30 MU

60 MU

Insert #1

3.7

6.4

Insert #2

1.2

2.2

Insert #3

0.2

0.4

Insert #4

0.2

0.5

Insert #5

0.3

0.6

Insert #6

0.7

1.1

Insert #7

1.2

2.2

Insert #8

1.0

1.8

  1. *For CNR measurement at each insert, the in-plane ROIs were placed at the center of each insert and the immediate background region. ROI diameter—0.8 cm; slice thickness—0.3 cm. The inset illustrates the indices of inserts