Volume 56, Issue 5 pp. 1459-1472
Research Article

Preoperative Evaluation of Gd-EOB-DTPA-Enhanced MRI Radiomics-Based Nomogram in Small Solitary Hepatocellular Carcinoma (≤3 cm) With Microvascular Invasion: A Two-Center Study

Yaqi Tian MD

Yaqi Tian MD

Department of Radiology, The Affiliated Hospital of Qingdao University, Qingdao, China

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Hui Hua MD

Hui Hua MD

Department of Thyroid Surgery, The Affiliated Hospital of Qingdao University, Qingdao, China

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Qiqi Peng MD

Qiqi Peng MD

Department of Radiology, The Affiliated Hospital of Qingdao University, Qingdao, China

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Zaixian Zhang MD

Zaixian Zhang MD

Department of Radiology, The Affiliated Hospital of Qingdao University, Qingdao, China

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Xiaolin Wang MD

Xiaolin Wang MD

Department of Radiology, The Affiliated Hospital of Qingdao University, Qingdao, China

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Junqi Han MD

Junqi Han MD

Department of Radiology, The Affiliated Hospital of Qingdao University, Qingdao, China

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Wenjuan Ma PhD

Corresponding Author

Wenjuan Ma PhD

Department of Breast Imaging, Tianjin Medical University Cancer Institute and Hospital, Tianjin, China

Address reprint requests to: W.M., Department of Breast Imaging, Tianjin Medical University Cancer Institute and Hospital, Tianjin, China. E-mail: [email protected], or J.C., Department of Breast Imaging, Affiliated Hospital of Qingdao University, 59 Haier Road, Laoshan District, Qingdao City, Shandong Province, China. E-mail: [email protected]

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Jingjing Chen MD

Corresponding Author

Jingjing Chen MD

Department of Breast Imaging, The Affiliated Hospital of Qingdao University, Qingdao, China

Address reprint requests to: W.M., Department of Breast Imaging, Tianjin Medical University Cancer Institute and Hospital, Tianjin, China. E-mail: [email protected], or J.C., Department of Breast Imaging, Affiliated Hospital of Qingdao University, 59 Haier Road, Laoshan District, Qingdao City, Shandong Province, China. E-mail: [email protected]

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First published: 17 March 2022
Citations: 6

Abstract

Background

Preoperative evaluation of microvascular invasion (MVI) in small solitary hepatocellular carcinoma (HCC; maximum lesion diameter ≤ 3 cm) is important for treatment decisions.

Purpose

To apply gadolinium ethoxybenzyl diethylenetriamine pentaacetic acid (Gd-EOB-DTPA)-enhanced MRI to develop and validate a nomogram for preoperative evaluation of MVI in small solitary HCC and to compare the effectiveness of radiomics evaluation models based on different volumes of interest (VOIs).

Study Type

Retrospective.

Population

A total of 196 patients include 62 MVI-positive and 134 MVI-negative patients were enrolled (training cohort, n = 105; testing cohort, n = 45; external validation cohort, n = 46).

Field Strength/Sequence

3.0 T, fat suppressed fast-spin-echo T2-weighted and Gd-EOB-DTPA-enhanced T1-weighted magnetization-prepared rapid gradient-echo sequences.

Assessment

Radiomics features were extracted on T2-weighted, arterial phase (AP), and hepatobiliary phase (HBP) images from different VOIs (VOIintratumor and VOIintratumor+peritumor) and filtered by the least absolute shrinkage selection operator (LASSO) regression. From VOIintratumor and VOIintratumor+peritumor, eight radiomics models were constructed based on three MRI sequences (T2-weighted, AP, and HBP) and fused sequences (combined of three sequences). Nomograms were constructed of a clinical-radiological (CR) model and a clinical-radiological-radiomics (CRR) model.

Statistical Tests

One-way analysis of variance, independent t-test, Chi-square test or Fisher's exact test, Wilcoxon rank-sum test, LASSO, logistic regression analysis, area under the curve (AUC), nomograms, decision curve, net reclassification improvement (NRI), integrated discrimination improvement (IDI) analyses, and DeLong test.

Results

Among eight radiomics models, the fused sequences-based VOIintratumor+peritumor radiomics model showed the best performance. The CRR model containing the best performance radiomics model and CR model with the AUC values were 0.934, 0.889, and 0.875, respectively. NRI and IDI analyses showed that the CRR model improved evaluation efficacy over the CR model for all three cohorts (all P-value <0.05).

Data Conclusion

The CRR model nomogram could preoperatively evaluate MVI in small solitary HCC. The radiomics model based on VOIintratumor+peritumor might achieve better evaluation results.

Evidence Level

4

Technical Efficacy Stage

2

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