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Table 3 Comparisons of CI and HI for Pgtv and PTV in the present study (n = 10).

From: Dosimetric comparison using different multileaf collimeters in intensity-modulated radiotherapy for upper thoracic esophageal cancer

Patient number

Pgtv

PTV

 

CI

HI

CI

HI

 

10 mm

4 mm

10 mm

4 mm

10 mm

4 mm

10 mm

4 mm

1

0.709

0.740

1.090

1.083

0.684

0.672

1.357

1.341

2

0.665

0.690

1.094

1.087

0.676

0.688

1.347

1.323

3

0.721

0.721

1.090

1.086

0.725

0.734

1.318

1.304

4

0.689

0.725

1.095

1.074

0.708

0.723

1.337

1.317

5

0.438

0.553

1.108

1.087

0.668

0.677

1.351

1.324

6

0.684

0.706

1.145

1.134

0.718

0.734

1.330

1.310

7

0.720

0.737

1.151

1.128

0.708

0.728

1.349

1.320

8

0.699

0.730

1.093

1.087

0.652

0.671

1.311

1.296

9

0.719

0.734

1.080

1.074

0.700

0.699

1.328

1.312

10

0.722

0.727

1.101

1.089

0.750

0.748

1.322

1.302

Average (mean ± SD)

0.677 ± 0.086

0.706 ± 0.056

1.105 ± 0.024

1.093 ± 0.021

0.699 ± 0.029

0.707 ± 0.029

1.335 ± 0.016

1.315 ± 0.013

p value

0.008

0.001

0.03

0.007

  1. CI: conformity index; HI: homogeneous index; Pgtv: planning gross target volume; PTV: planning target volume; 10 and 4 mm: multileaf collimator leaf widths as 10 and 4 mm, respectively.
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Radiation Oncology

ISSN: 1748-717X

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