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Table 6 The values of statistically significant r s of textural features to dose-volumetric parameter differences of head and neck VMAT plans

From: Texture analysis on the edge-enhanced fluence of VMAT

 

d= 1

d= 5

d= 10

 

r s

p

r s

p

r s

p

 

ASM

D5% of target 2

-

-

0.501

0.026

-

-

Mean dose to target 2

0.532

0.016

0.565

0.009

-

-

D95% of target 3

-

-

0.641

0.003

-

-

D5% of target 3

0.558

0.013

0.635

0.003

-

-

Mean dose to target 3

0.489

0.034

0.635

0.003

-

-

 

IDM

D5% of target 1

-

-

0.511

0.021

0.478

0.033

Mean dose to target 1

-

-

0.562

0.010

0.520

0.019

D95% of target 2

-

-

0.490

0.028

-

-

Minimum dose to target 2

0.447

0.048

-

-

-

-

Mean dose to target 2

0.501

0.024

0.593

0.006

0.548

0.012

D5% of target 3

-

-

0.512

0.025

-

-

Mean dose to right parotid gland

0.540

0.014

0.619

0.004

-

-

Mean dose to left parotid gland

-

-

0.506

0.023

-

-

Maximum dose to right optic nerve

0.498

0.025

0.517

0.020

-

-

 

Contrast

D5% of target 1

-

-

−0.454

0.044

−0.502

0.024

Mean dose to target 1

−0.486

0.030

−0.539

0.014

−0.488

0.029

D95% of target 2

−0.494

0.027

−0.651

0.002

-

-

D5% of target 2

−0.534

0.017

−0.618

0.004

−0.477

0.035

Minimum dose to target 2

−0.478

0.033

-

-

-

-

Mean dose to target 2

−0.626

0.003

−0.704

0.001

−0.521

0.018

D95% of target 3

-

-

−0.508

0.026

-

-

D5% of target 3

−0.576

0.010

−0.635

0.003

-

-

Mean dose to target 3

−0.484

0.036

−0.493

0.032

-

-

Mean dose to right parotid gland

−0.595

0.006

−0.516

0.020

-

-

Maximum dose to right optic nerve

−0.631

0.003

−0.477

0.033

-

-

 

Variance

D95% of target 1

−0.553

0.012

−0.558

0.011

−0.589

0.006

D5% of target 1

−0.693

0.001

−0.689

0.001

−0.688

0.001

Mean dose to target 1

−0.705

0.001

−0.708

< 0.001

−0.727

< 0.001

D95% of target 2

−0.630

0.003

−0.617

0.004

−0.626

0.003

D5% of target 2

−0.668

0.002

−0.672

0.002

−0.645

0.003

Mean dose to target 2

−0.734

< 0.001

−0.733

< 0.001

−0.734

< 0.001

D95% of target 3

−0.553

0.014

−0.548

0.015

−0.519

0.023

D5% of target 3

−0.665

0.002

−0.670

0.002

−0.691

0.001

Maximum dose to target 3

−0.511

0.025

−0.490

0.033

−0.497

0.030

Mean dose to target 3

−0.487

0.035

−0.502

0.029

−0.519

0.023

Mean dose to right parotid gland

−0.705

0.001

−0.675

0.001

−0.709

< 0.001

Mean dose to left parotid gland

−0.479

0.033

−0.444

0.050

−0.458

0.042

Maximum dose to right optic nerve

−0.568

0.009

−0.560

0.010

−0.560

0.010

 

Correlation

D5% of target 1

−0.589

0.006

−0.546

0.013

-

-

Maximum dose to target 1

-

-

−0.490

0.028

-

-

 

Entropy

D5% of target 1

-

-

−0.487

0.029

-

-

Mean dose to target 1

-

-

−0.466

0.038

-

-

D5% of target 2

-

-

−0.519

0.021

−0.451

0.047

Mean dose to target 2

−0.465

0.039

−0.537

0.015

-

-

D95% of target 3

−0.522

0.022

−0.584

0.009

−0.497

0.030

D5% of target 3

−0.598

0.007

−0.656

0.002

−0.543

0.016

Mean dose to target 3

−0.487

0.035

−0.552

0.014

-

-

  1. Abbreviations: d = particular displacement distance, rs = Spearman’s rank correlation coefficient, Dn% = dose received by n% volume of structure, ASM = angular second moment, IDM = inverse difference moment.