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Table 3 Correlations between atrophy rate and the change rates of parotid IVIM or DCE MR parameters

From: Early evaluation of irradiated parotid glands with intravoxel incoherent motion MR imaging: correlation with dynamic contrast-enhanced MR imaging

Atrophy rate

r

p value

RIVIM-PARs

 RADC

−0.418

0.011a

 RD

0.066

0.702

 RD*

0.038

0.825

 Rf

−0.449

0.006a

RDCE-PARs

 RMRE

−0.372

0.025a

 RTTP

0.208

0.223

 RWash in Rate

−0.136

0.428

  1. IVIM Intravoxel incoherent motion, DCE Dynamic contrast-enhanced, r Pearson correlation coefficient, RIVIM-PARsand RDCE-PARs are the change rates of IVIM and DCE MR parameters from pre-RT to post-RT, respectively, R ADC , R D , RD*, R f , R MRE , R TTP and R Wash in Rate are the change rates of apparent diffusion coefficient (ADC), pure diffusion coefficient (D), pseudo-diffusion coefficient (D*), perfusion fraction (f), maximum relative enhancement (MRE), time to peak (TTP) and Wash in Rate from pre-RT (2 weeks before radiotherapy) to post-RT (4 weeks after RT), respectively
  2. adenotes a significant correlation between the parotid atrophy rate and the change rate of each IVIM or DCE MR parameter
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BMC Cancer

ISSN: 1471-2407

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