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Table 1 Recovery coefficients by sphere size

From: The use of positron emission tomography/computed tomography imaging in radiation therapy: a phantom study for setting internal target volume of biological target volume

Sphere size (mm)

Background

Air

Water

SCS

HCS

SCS

HCS

Mean ± SD

Mean ± SD

Mean ± SD

Mean ± SD

Rco

37

1.00 ± 0.01

1.00 ± 0.01

1.00 ± 0.03

1.00 ± 0.02

28

0.99 ± 0.01

0.99 ± 0.01

1.00 ± 0.04

0.98 ± 0.02

22

0.98 ± 0.01**

0.98 ± 0.01**

0.95 ± 0.03

0.93 ± 0.04**

17

0.91 ± 0.01**

0.90 ± 0.01**

0.91 ± 0.06**

0.87 ± 0.06**

13

0.80 ± 0.02**

0.79 ± 0.01**

0.74 ± 0.06**

0.76 ± 0.04**

10

0.56 ± 0.02**

0.56 ± 0.02**

0.57 ± 0.04**

0.56 ± 0.05**

  1. **indicates p < 0.05 compared with the 37-mm sphere using Dunnett’s multiple comparisons.
  2. Rco, recovery coefficient; SCS, slow computed tomography scanning; HCS, helical computed tomography scanning; SD, standard deviation.
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Radiation Oncology

ISSN: 1748-717X

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