Abstract
Lobectomy is an effective and well-established therapy for localized lung cancer. This study aimed to assess the lung and lobe change after lobectomy and predict the postoperative lung volume. The study included 135 lung cancer patients from two hospitals who underwent lobectomy (32, right upper lobectomy (RUL); 31, right middle lobectomy (RML); 24, right lower lobectomy (RLL); 26, left upper lobectomy (LUL); 22, left lower lobectomy (LLL)). We initially employ a convolutional neural network model (nnU-Net) for automatically segmenting pulmonary lobes. Subsequently, we assess the volume, effective lung volume (ELV), and attenuation distribution for each lobe as well as the entire lung, before and after lobectomy. Ultimately, we formulate a machine learning model, incorporating linear regression (LR) and multi-layer perceptron (MLP) methods, to predict the postoperative lung volume. Due to the physiological compensation, the decreased TLV is about 10.73%, 8.12%, 13.46%, 11.47%, and 12.03% for the RUL, RML, RLL, LUL, and LLL, respectively. The attenuation distribution in each lobe changed little for all types of lobectomy. LR and MLP models achieved a mean absolute percentage error of 9.8% and 14.2%, respectively. Radiological findings and a predictive model of postoperative lung volume might help plan the lobectomy and improve the prognosis.
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Data availability
The datasets used and/or analysed during the current study are available from the corresponding author on reasonable request.
Abbreviations
- CT:
-
Computed tomography
- ELV:
-
Effective lung volume
- FEV1:
-
Forced expiratory volume in one second
- FVC:
-
Forced vital capacity
- HAV:
-
High attenuation volume
- LAV:
-
Low attenuation volume
- LLL:
-
Left lower lobectomy
- LUL:
-
Left upper lobectomy
- MAV:
-
Middle attenuation volume
- PFT:
-
Pulmonary function test
- RLL:
-
Right lower lobectomy
- RML:
-
Right middle lobectomy
- RUL:
-
Right upper lobectomy
- TLV:
-
Total volume change
- VATS:
-
Video-assisted thoracoscopic surgery
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Funding
This work was partly supported by the National Natural Science Foundation of China under Grant (Nos. 82072008, 62271131), the Liaoning Natural Science Foundation (2021-YGJC-21, 2020-BS-049), and the Fundamental Research Funds for the Central Universities (N2119010, N2224001-10).
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YW, HP, and JS contributed equally to the data collection, processing and analysis, and writing – original draft preparation. JF contributed to the software and investigation. YY contributed to the data curation and validation. SQ, WQ, and JW contributed to the conceptualization, supervision, writing – reviewing and editing, funding acquisition. All authors read and approved the final manuscript.
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The study was approved by the Medical Ethics Committee of the Affiliated Zhongshan Hospital of Dalian University and Shengjing Hospital of China Medical University. All procedures involving human participants were performed according to the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Formal consent was not required for this retrospective study.
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Wu, Y., Pang, H., Shen, J. et al. Depicting and predicting changes of lung after lobectomy for cancer by using CT images. Med Biol Eng Comput 61, 3049–3066 (2023). https://doi.org/10.1007/s11517-023-02907-x
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DOI: https://doi.org/10.1007/s11517-023-02907-x