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Radiomics in Abdominopelvic Solid-Organ Oncologic Imaging: Current Status

期刊

AMERICAN JOURNAL OF ROENTGENOLOGY
卷 219, 期 6, 页码 985-995

出版社

AMER ROENTGEN RAY SOC
DOI: 10.2214/AJR.22.27695

关键词

abdomen; features; oncology; radiomics; texture

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This article reviews the radiomics pipeline and the application of radiomics in abdominopelvic solid-organ cancers. The limitations of the available literature are highlighted, indicating a need for stronger evidence to support clinical adoption.
Radiomics is the process of extraction of high-throughput quantitative imaging features from medical images. These features represent noninvasive quantitative biomarkers that go beyond the traditional imaging features visible to the human eye. This article first reviews the steps of the radiomics pipeline, including image acquisition, ROI selection and image segmentation, image preprocessing, feature extraction, feature selection, and model development and application. Current evidence for the application of radiomics in abdominopelvic solid-organ cancers is then reviewed. Applications including diagnosis, subtype determination, treatment response assessment, and outcome prediction are explored within the context of hepatobiliary and pancreatic cancer, renal cell carcinoma, prostate cancer, gynecologic cancer, and adrenal masses. This literature review focuses on the strongest available evidence, including systematic reviews, meta-analyses, and large multicenter studies. Limitations of the available literature are highlighted, including marked heterogeneity in radiomics methodology, frequent use of small sample sizes with high risk of overfitting, and lack of prospective design, external validation, and standardized radiomics workflow. Thus, although studies have laid a foundation that supports continued investigation into radiomics models, stronger evidence is needed before clinical adoption.

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