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Radiomics machine learning algorithm facilitates detection of small pancreatic neuroendocrine tumors on CT.
Lopez-Ramirez, Felipe; Soleimani, Sahar; Azadi, Javad R; Sheth, Sheila; Kawamoto, Satomi; Javed, Ammar A; Tixier, Florent; Hruban, Ralph H; Fishman, Elliot K; Chu, Linda C.
Afiliación
  • Lopez-Ramirez F; Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA.
  • Soleimani S; Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA.
  • Azadi JR; Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA.
  • Sheth S; Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; Department of Radiology, New York University Grossman School of Medicine, New York, NY 10016, USA.
  • Kawamoto S; Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA.
  • Javed AA; Department of Surgery, New York University Grossman School of Medicine, New York, NY, 10016, USA.
  • Tixier F; Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA.
  • Hruban RH; Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; Sol Goldman Pancreatic Cancer Research Center, Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA.
  • Fishman EK; Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA.
  • Chu LC; Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA. Electronic address: lchu1@jhmi.edu.
Diagn Interv Imaging ; 2024 Sep 14.
Article en En | MEDLINE | ID: mdl-39278763
ABSTRACT

PURPOSE:

The purpose of this study was to develop a radiomics-based algorithm to identify small pancreatic neuroendocrine tumors (PanNETs) on CT and evaluate its robustness across manual and automated segmentations, exploring the feasibility of automated screening. MATERIALS AND

METHODS:

Patients with pathologically confirmed T1 stage PanNETs and healthy controls undergoing dual-phase CT imaging were retrospectively identified. Manual segmentation of pancreas and tumors was performed, then automated pancreatic segmentations were generated using a pretrained neural network. A total of 1223 radiomics features were independently extracted from both segmentation volumes, in the arterial and venous phases separately. Ten final features were selected to train classifiers to identify PanNETs and controls. The cohort was divided into training and testing sets, and performance of classifiers was assessed using area under the receiver operator characteristic curve (AUC), specificity and sensitivity, and compared against two radiologists blinded to the diagnoses.

RESULTS:

A total of 135 patients with 142 PanNETs, and 135 healthy controls were included. There were 168 women and 102 men, with a mean age of 55.4 ± 11.6 (standard deviation) years (range 20-85 years). Median PanNET size was 1.3 cm (Q1, 1.0; Q3, 1.5; range 0.5-1.9). The arterial phase LightGBM model achieved the best performance in the test set, with 90 % sensitivity (95 % confidence interval [CI] 80-98), 76 % specificity (95 % CI 62-88) and an AUC of 0.87 (95 % CI 0.79-0.94). Using features from the automated segmentations, this model achieved an AUC of 0.86 (95 % CI 0.79-0.93). In comparison, the two radiologists achieved a mean 50 % sensitivity and 100 % specificity using arterial phase CT images.

CONCLUSION:

Radiomics features identify small PanNETs, with stable performance when extracted using automated segmentations. These models demonstrate high sensitivity, complementing the high specificity of radiologists, and could serve as opportunistic screeners.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Diagn Interv Imaging Año: 2024 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Francia
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Diagn Interv Imaging Año: 2024 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Francia