In:
Stroke, Ovid Technologies (Wolters Kluwer Health), Vol. 50, No. 9 ( 2019-09), p. 2314-2321
Abstract:
Discrimination of the stability of intracranial aneurysms is critical for determining the treatment strategy, especially in small aneurysms. This study aims to evaluate the feasibility of applying machine learning for predicting aneurysm stability with radiomics-derived morphological features. Methods— Morphological features of 719 aneurysms were extracted from PyRadiomics, of which 420 aneurysms with Maximum3DDiameter ranging from 4 mm to 8 mm were enrolled for analysis. The stability of these aneurysms and other clinical characteristics were reviewed from the medical records. Based on the morphologies with/without clinical features, machine learning models were constructed and compared to define the morphological determinants and screen the optimal model for predicting aneurysm stability. The effect of clinical characteristics on the morphology of unstable aneurysms was analyzed. Results— Twelve morphological features were automatically extracted from PyRadiomics implemented in Python for each aneurysm. Lasso regression defined Flatness as the most important morphological feature to predict aneurysm stability, followed by SphericalDisproportion, Maximum2DDiameterSlice, and SurfaceArea. SurfaceArea (odds ratio [OR], 0.697; 95% CI, 0.476–0.998), SphericalDisproportion (OR, 1.730; 95% CI, 1.143–2.658), Flatness (OR, 0.584; 95% CI, 0.374–0.894), Hyperlipemia (OR, 2.410; 95% CI, 1.029–5.721), Multiplicity (OR, 0.182; 95% CI, 0.082–0.380), Location at middle cerebral artery (OR, 0.359; 95% CI, 0.134–0.902), and internal carotid artery (OR, 0.087; 95% CI, 0.030–0.211) were enrolled into the final prediction model. In terms of performance, the area under curve of the model reached 0.853 (95% CI, 0.767–0.940). For unstable aneurysms, Compactness1 ( P =0.035), Compactness2 ( P =0.036), Sphericity ( P =0.035), and Flatness ( P =0.010) were low, whereas SphericalDisproportion ( P =0.034) was higher in patients with hypertension. Conclusions— Morphological features extracted from PyRadiomics can be used for aneurysm stratification. Flatness is the most important morphological determinant to predict aneurysm stability. Our model can be used to predict aneurysm stability. Unstable aneurysm is more irregular in patients with hypertension.
Type of Medium:
Online Resource
ISSN:
0039-2499
,
1524-4628
DOI:
10.1161/STROKEAHA.119.025777
Language:
English
Publisher:
Ovid Technologies (Wolters Kluwer Health)
Publication Date:
2019
detail.hit.zdb_id:
1467823-8
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