Spectral CT findings of focal organizing pneumonia and peripheral lung cancer
10.13929/j.issn.1003-3289.2020.09.014
- VernacularTitle: 局灶性机化性肺炎及周围型肺癌能谱CT表现
- Author:
Guojin ZHANG
1
Author Information
1. Department of Radiology, Lanzhou University Second Hospital, Lanzhou University Second Clinical School of Medicine
- Publication Type:Journal Article
- Keywords:
Diagnosis, differential;
Lung neoplasms;
Pneumonia;
Spectral imaging;
Tomography, X-ray computed
- From:
Chinese Journal of Medical Imaging Technology
2020;36(9):1330-1334
- CountryChina
- Language:Chinese
-
Abstract:
Objective: To observe the energy spectral CT manifestations of focal organizing pneumonia (FOP) and peripheral lung cancer (PLC). Methods: Data of 40 patients with FOP (FOP group) and 60 patients with PLC (PLC group) confirmed by pathology who underwent chest dual-phase energy spectral CT were retrospectively analyzed. CT40~100 keV values on single energy images, iodine concentration, water concentration and effective atomic number at arterial and venous phase of lesions were measured and recorded, respectively. The corresponding energy spectral curve was drawn, and the slope of the curve was calculated. The quantitative parameters were compared between 2 groups. Results: There was no statistically differences of patients' age, gender, clinical symptoms nor lesions' size or location between 2 groups (all P>0.05). CT40 keV, CT50 keV, CT60 keV and CT 70 keV values, λ70 keV, iodine concentration, effective atomic number at arterial phase in PLC group were all higher than those in FOP group (t=3.46, 3.08, 3.08, 2.03, 2.32, 2.69, 2.73, all P<0.05), while at venous phase in PLC group were all lower than those in FOP group (t=-3. 51, -3.82, -3.01, -2.30, -2.76, -2.40, -2.43, all P<0.05). No statistical difference of other energy spectrum parameters at arterial phase or venous phase was found between 2 groups (all P>0.05). Conclusion: Energy spectral CT findings of FOP and PLC had certain difference, providing references for differential diagnosis of FOP and PLC.
