Imaging characteristics and diagnostic value of energy spectral CT pulmonary angiography for pulmonary embolism(PDF)
《中国医学物理学杂志》[ISSN:1005-202X/CN:44-1351/R]
- Issue:
- 2023年第2期
- Page:
- 186-189
- Research Field:
- 医学影像物理
- Publishing date:
Info
- Title:
- Imaging characteristics and diagnostic value of energy spectral CT pulmonary angiography for pulmonary embolism
- Author(s):
- ZHANG Fengmei; HUANG Junrong; XIE Zidong; SU Hongyan
- Department of Radiology, Wuzhou Red Cross Hospital, Wuzhou 543002, China
- Keywords:
- Keywords: pulmonary embolism pulmonary artery energy spectral CT imaging characteristic iodine-based lung perfusion
- PACS:
- R563.5；R816.4
- DOI:
- DOI:10.3969/j.issn.1005-202X.2023.02.010
- Abstract:
- Objective To explore the imaging characteristics of energy spectral CT pulmonary angiography (CTPA) for pulmonary embolism (PE) and explore its diagnostic value. Methods A total of 53 cases of highly suspected PE were retrospectively analyzed. The single-energy spectral CTPA images and iodine-based material decomposition images for lung perfusion detection were obtained to record the number, distribution and classification of pulmonary emboli. The imaging characteristics of CTPA were analyzed. The iodine concentrations in spectral CT for patients with different degrees and types of embolism were compared, and the spectral CT scan parameters (iodine concentration, water concentration and CT number) in embolism area and control area were compared. Results Taking CTPA as the golden standard, in the 53 patients with highly suspected PE, there were 32 confirmed cases. Energy spectral CTPA showed that there were 162 emboli, including 37 complete emboli and 125 incomplete emboli, while the iodine-based material decomposition image showed that there were 171 emboli, including 49 complete emboli and 122 incomplete emboli. For central, eccentric and complete emboli, the iodine concentrations in embolism area were significantly lower than those in control area (P<0.05), but for wall-attached emboli, there was no significant difference between embolism area and control area (P>0.05). In embolism area, the iodine concentration of complete emboli was significantly lower than those of incomplete emboli (central, eccentric and wall-attached) (P<0.05). Conclusion The imaging characteristics of pulmonary artery energy spectrum CT chest scan include filling defect in pulmonary artery, pulmonary artery dilatation, mosaic sign, orbital sign and pulmonary infarction. The images of iodine-based pulmonary perfusion can be applied as the imaging basis for the early diagnosis of PE and the evaluation of embolism severity.
Last Update: 2023-03-03