Xinguan Yang1, Jianxing He2, Jiao Wang3, Weiwei Li3, Chunbo Liu4, Dashan Gao3, Yubao Guan5. 1. Department of Radiology, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China; National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Disease, State Key Laboratory of Respiratory Diseases, Guangzhou, China. 2. National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Disease, State Key Laboratory of Respiratory Diseases, Guangzhou, China; Department of Thoracic Surgery, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China. 3. 12 Sigma Technologies, #420, San Diego, CA 92130, USA. 4. 12 Sigma Technologies, Suzhou, China. 5. Department of Radiology, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China; National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Disease, State Key Laboratory of Respiratory Diseases, Guangzhou, China. Electronic address: yubaoguan@163.com.
Abstract
OBJECTIVES: Pulmonary granulomatous nodule (GN) with spiculated or lobulated appearance are indistinguishable from solid lung adenocarcinoma (SADC) based on CT morphological features, and partial false-positive findings on PET/CT. The objective of this study was to investigate the ability of quantitative CT radiomics for preoperatively differentiating solitary atypical GN from SADC. METHODS: 302 eligible patients (SADC = 209, GN = 93) were evaluated in this retrospective study and were divided into training (n = 211) and validation cohorts (n = 91). Radiomics features were extracted from plain and vein-phase CT images. The L1 regularized logistic regression model was used to identify the optimal radiomics features for construction of a radiomics model in differentiate solitary GN from SADC. The performance of the constructed radiomics model was evaluated using the area under curve (AUC) of receiver operating characteristic curve (ROC). RESULTS: 16.7% (35/209) of SADC were misdiagnosed as GN and 24.7% (23/93) of GN were misdiagnosed as lung cancer before surgery. The AUCs of combined radiomics and clinical risk factors were 0.935, 0.902, and 0.923 in the training cohort of plain radiomics(PR), vein radiomics, and plain and vein radiomics, and were 0.817, 0835, and 0.841 in the validation cohort of three models, respectively. PR combined with clinical risk factors (PRC) performed better than simple radiomics models (p < 0.05). The diagnostic accuracy of PRC in the total cohorts was similar to our radiologists (p ≥ 0.05). CONCLUSIONS: As a noninvasive method, PRC has the ability to identify SADC and GN with spiculation or lobulation.
OBJECTIVES:Pulmonary granulomatous nodule (GN) with spiculated or lobulated appearance are indistinguishable from solid lung adenocarcinoma (SADC) based on CT morphological features, and partial false-positive findings on PET/CT. The objective of this study was to investigate the ability of quantitative CT radiomics for preoperatively differentiating solitary atypical GN from SADC. METHODS: 302 eligible patients (SADC = 209, GN = 93) were evaluated in this retrospective study and were divided into training (n = 211) and validation cohorts (n = 91). Radiomics features were extracted from plain and vein-phase CT images. The L1 regularized logistic regression model was used to identify the optimal radiomics features for construction of a radiomics model in differentiate solitary GN from SADC. The performance of the constructed radiomics model was evaluated using the area under curve (AUC) of receiver operating characteristic curve (ROC). RESULTS: 16.7% (35/209) of SADC were misdiagnosed as GN and 24.7% (23/93) of GN were misdiagnosed as lung cancer before surgery. The AUCs of combined radiomics and clinical risk factors were 0.935, 0.902, and 0.923 in the training cohort of plain radiomics(PR), vein radiomics, and plain and vein radiomics, and were 0.817, 0835, and 0.841 in the validation cohort of three models, respectively. PR combined with clinical risk factors (PRC) performed better than simple radiomics models (p < 0.05). The diagnostic accuracy of PRC in the total cohorts was similar to our radiologists (p ≥ 0.05). CONCLUSIONS: As a noninvasive method, PRC has the ability to identify SADC and GN with spiculation or lobulation.
Authors: Camila Vilela de Oliveira; Natally Horvat; Leonardo de Abreu Testagrossa; Davi Dos Santos Romão; Marina Bastos Rassi; Hye Ju Lee Journal: Eur J Radiol Open Date: 2021-01-20