Erschienen in:
01.10.2015 | Urogenital
Haralick texture analysis of prostate MRI: utility for differentiating non-cancerous prostate from prostate cancer and differentiating prostate cancers with different Gleason scores
verfasst von:
Andreas Wibmer, Hedvig Hricak, Tatsuo Gondo, Kazuhiro Matsumoto, Harini Veeraraghavan, Duc Fehr, Junting Zheng, Debra Goldman, Chaya Moskowitz, Samson W. Fine, Victor E. Reuter, James Eastham, Evis Sala, Hebert Alberto Vargas
Erschienen in:
European Radiology
|
Ausgabe 10/2015
Einloggen, um Zugang zu erhalten
Abstract
Objectives
To investigate Haralick texture analysis of prostate MRI for cancer detection and differentiating Gleason scores (GS).
Methods
One hundred and forty-seven patients underwent T2- weighted (T2WI) and diffusion-weighted prostate MRI. Cancers ≥0.5 ml and non-cancerous peripheral (PZ) and transition (TZ) zone tissue were identified on T2WI and apparent diffusion coefficient (ADC) maps, using whole-mount pathology as reference. Texture features (Energy, Entropy, Correlation, Homogeneity, Inertia) were extracted and analysed using generalized estimating equations.
Results
PZ cancers (n = 143) showed higher Entropy and Inertia and lower Energy, Correlation and Homogeneity compared to non-cancerous tissue on T2WI and ADC maps (p-values: <.0001–0.008). In TZ cancers (n = 43) we observed significant differences for all five texture features on the ADC map (all p-values: <.0001) and for Correlation (p = 0.041) and Inertia (p = 0.001) on T2WI. On ADC maps, GS was associated with higher Entropy (GS 6 vs. 7: p = 0.0225; 6 vs. >7: p = 0.0069) and lower Energy (GS 6 vs. 7: p = 0.0116, 6 vs. >7: p = 0.0039). ADC map Energy (p = 0.0102) and Entropy (p = 0.0019) were significantly different in GS ≤3 + 4 versus ≥4 + 3 cancers; ADC map Entropy remained significant after controlling for the median ADC (p = 0.0291).
Conclusion
Several Haralick-based texture features appear useful for prostate cancer detection and GS assessment.
Key Points
• Several Haralick texture features may differentiate non-cancerous and cancerous prostate tissue.
• Tumour Energy and Entropy on ADC maps correlate with Gleason score.
• T2w-image-derived texture features are not associated with the Gleason score.