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European Radiology
Published in: European Radiology 4/2018

01-04-2018 | Gastrointestinal

CT texture features of liver parenchyma for predicting development of metastatic disease and overall survival in patients with colorectal cancer

Authors: Scott J. Lee, Ryan Zea, David H. Kim, Meghan G. Lubner, Dustin A Deming, Perry J. Pickhardt

Published in: European Radiology | Issue 4/2018

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Abstract

Objectives

To determine if identifiable hepatic textural features are present at abdominal CT in patients with colorectal cancer (CRC) prior to the development of CT-detectable hepatic metastases.

Methods

Four filtration–histogram texture features (standard deviation, skewness, entropy and kurtosis) were extracted from the liver parenchyma on portal venous phase CT images at staging and post-treatment surveillance. Surveillance scans corresponded to the last scan prior to the development of CT-detectable CRC liver metastases in 29 patients (median time interval, 6 months), and these were compared with interval-matched surveillance scans in 60 CRC patients who did not develop liver metastases. Predictive models of liver metastasis-free survival and overall survival were built using regularised Cox proportional hazards regression.

Results

Texture features did not significantly differ between cases and controls. For Cox models using all features as predictors, all coefficients were shrunk to zero, suggesting no association between any CT texture features and outcomes. Prognostic indices derived from entropy features at surveillance CT incorrectly classified patients into risk groups for future liver metastases (p < 0.001).

Conclusions

On surveillance CT scans immediately prior to the development of CRC liver metastases, we found no evidence suggesting that changes in identifiable hepatic texture features were predictive of their development.

Key Points

• No correlation between liver texture features and metastasis-free survival was observed.
• Liver texture features incorrectly classified patients into risk groups for liver metastases.
• Standardised texture analysis workflows need to be developed to improve research reproducibility.
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Metadata
Title
CT texture features of liver parenchyma for predicting development of metastatic disease and overall survival in patients with colorectal cancer
Authors
Scott J. Lee
Ryan Zea
David H. Kim
Meghan G. Lubner
Dustin A Deming
Perry J. Pickhardt
Publication date
01-04-2018
Publisher
Springer Berlin Heidelberg
Published in
European Radiology / Issue 4/2018
Print ISSN: 0938-7994
Electronic ISSN: 1432-1084
DOI
https://doi.org/10.1007/s00330-017-5111-6

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