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Spatial-temporal variability of radiomic features and its effect on the classification of lung cancer histology.

Publication ,  Journal Article
Lafata, K; Cai, J; Wang, C; Hong, J; Kelsey, CR; Yin, F-F
Published in: Phys Med Biol
November 8, 2018

The purpose of this research was to study the sensitivity of Computed Tomography (CT) radiomic features to motion blurring and signal-to-noise ratios (SNR), and investigate its downstream effect regarding the classification of non-small cell lung cancer (NSCLC) histology. Forty-three radiomic features were considered and classified into one of four categories: Morphological, Intensity, Fine Texture, and Coarse Texture. First, a series of simulations were used to study feature-sensitivity to changes in spatial-temporal resolution. A dynamic digital phantom was used to generate images with different breathing amplitudes and SNR, from which features were extracted and characterized relative to initial simulation conditions. Stage I NSCLC patients were then retrospectively identified, from which three different acquisition-specific feature-spaces were generated based on free-breathing (FB), average-intensity-projection (AIP), and end-of-exhalation (EOE) CT images. These feature-spaces were derived to cover a wide range of spatial-temporal tradeoff. Normalized percent differences and concordance correlation coefficients (CCC) were used to assess the variability between the 3D and 4D acquisition techniques. Subsequently, three corresponding acquisition-specific logistic regression models were developed to classify lung tumor histology. Classification performance was compared between the different data-dependent models. Simulation results demonstrated strong linear dependences (p  >  0.95) between respiratory motion and morphological features, as well as between SNR and texture features. The feature Short Run Emphasis was found to be particularly stable to both motion blurring and changes in SNR. When comparing FB-to-EOE, 37% of features demonstrated high CCC agreement (CCC  >  0.8), compared to only 30% for FB-to-AIP. In classifying tumor histology, EoE images achieved an average AUC, Accuracy, Sensitivity, and Specificity of [Formula: see text], respectively. FB images achieved respective values of [Formula: see text], and AIP images achieved respective values of [Formula: see text]. Several radiomic features have been identified as being relatively robust to spatial-temporal variations based on both simulation data and patient data. In general, features that were sensitive to motion blurring were not necessarily the same features that were sensitive to changes in SNR. Our modeling results suggest that the EoE phase of a 4DCT acquisition may provide useful radiomic information, particularly for features that are highly sensitive to respiratory motion.

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Published In

Phys Med Biol

DOI

EISSN

1361-6560

Publication Date

November 8, 2018

Volume

63

Issue

22

Start / End Page

225003

Location

England

Related Subject Headings

  • Tomography, X-Ray Computed
  • Signal-To-Noise Ratio
  • Respiration
  • Phantoms, Imaging
  • Nuclear Medicine & Medical Imaging
  • Lung Neoplasms
  • Humans
  • Carcinoma, Non-Small-Cell Lung
  • 5105 Medical and biological physics
  • 1103 Clinical Sciences
 

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Lafata, K., Cai, J., Wang, C., Hong, J., Kelsey, C. R., & Yin, F.-F. (2018). Spatial-temporal variability of radiomic features and its effect on the classification of lung cancer histology. Phys Med Biol, 63(22), 225003. https://doi.org/10.1088/1361-6560/aae56a
Lafata, Kyle, Jing Cai, Chunhao Wang, Julian Hong, Chris R. Kelsey, and Fang-Fang Yin. “Spatial-temporal variability of radiomic features and its effect on the classification of lung cancer histology.Phys Med Biol 63, no. 22 (November 8, 2018): 225003. https://doi.org/10.1088/1361-6560/aae56a.
Lafata K, Cai J, Wang C, Hong J, Kelsey CR, Yin F-F. Spatial-temporal variability of radiomic features and its effect on the classification of lung cancer histology. Phys Med Biol. 2018 Nov 8;63(22):225003.
Lafata, Kyle, et al. “Spatial-temporal variability of radiomic features and its effect on the classification of lung cancer histology.Phys Med Biol, vol. 63, no. 22, Nov. 2018, p. 225003. Pubmed, doi:10.1088/1361-6560/aae56a.
Lafata K, Cai J, Wang C, Hong J, Kelsey CR, Yin F-F. Spatial-temporal variability of radiomic features and its effect on the classification of lung cancer histology. Phys Med Biol. 2018 Nov 8;63(22):225003.
Journal cover image

Published In

Phys Med Biol

DOI

EISSN

1361-6560

Publication Date

November 8, 2018

Volume

63

Issue

22

Start / End Page

225003

Location

England

Related Subject Headings

  • Tomography, X-Ray Computed
  • Signal-To-Noise Ratio
  • Respiration
  • Phantoms, Imaging
  • Nuclear Medicine & Medical Imaging
  • Lung Neoplasms
  • Humans
  • Carcinoma, Non-Small-Cell Lung
  • 5105 Medical and biological physics
  • 1103 Clinical Sciences