Preliminary study on the diagnostic value of single-source dual-energy CT in diagnosing cervical lymph node metastasis of thyroid carcinoma
Autor: | Dehong Luo, Xiaolu Li, Meng Lin, Yanfeng Zhao, Jianying Li, Lin Li, Xiaoyi Wang, Xinming Zhao |
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Rok vydání: | 2017 |
Předmět: |
Pulmonary and Respiratory Medicine
medicine.medical_specialty Receiver operating characteristic business.industry medicine.medical_treatment Thyroidectomy medicine.disease 030218 nuclear medicine & medical imaging Metastasis Thyroid carcinoma Original Article on Quantitative Imaging of Thoracic Diseases 03 medical and health sciences Dissection 0302 clinical medicine medicine.anatomical_structure 030220 oncology & carcinogenesis medicine.artery medicine Radiology Lymph Common carotid artery business Lymph node |
Zdroj: | Journal of thoracic disease. 9(11) |
ISSN: | 2072-1439 |
Popis: | Background: To investigate the value of single-source dual-energy spectral CT imaging in improving the accuracy of preoperative diagnosis of lymph node metastasis of thyroid carcinoma. Methods: Thirty-four thyroid carcinoma patients were enrolled and received spectral CT scanning before thyroidectomy and cervical lymph node dissection surgery. Iodine-based material decomposition (MD) images and 101 sets of monochromatic images from 40 to 140 keV were reconstructed after CT scans. The iodine concentrations (IC) of lymph nodes were measured on the MD images and was normalized to that of common carotid artery to obtain the normalized iodine concentration (NIC). The CT number of lymph nodes as function of photon energy was measured on the 101 sets of images to generate a spectral HU curve and to calculate its slope λHU. The measurements between the metastatic and non-metastatic lymph nodes were statistically compared and receiver operating characteristic (ROC) curves were used to determine the optimal thresholds of these measurements for diagnosing lymph nodes metastasis. Results: There were 136 lymph nodes that were pathologically confirmed. Among them, 102 (75%) were metastatic and 34 (25%) were non-metastatic. The IC, NIC and the slope λHU of the metastatic lymph nodes were 3.93±1.58 mg/mL, 0.70±0.55 and 4.63±1.91, respectively. These values were statistically higher than the respective values of 1.77±0.71 mg/mL, 0.29±0.16 and 2.19±0.91 for the non-metastatic lymph nodes (all P Conclusions: The measurements obtained in dual-energy spectral CT improve the sensitivity and accuracy for preoperatively diagnosing lymph node metastasis in thyroid carcinoma. |
Databáze: | OpenAIRE |
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