The application value of dual-layer detector spectral CT multiparametric imaging in patients with pulmonary embolism
DU Hao
SHANG Wei
PANG Hongquan
XU Shengkai
WU Qiong
TIAN Jinjie
Abstract：Objective To explore the diagnostic value of multi-parameter imaging with dual-layer detector spectral CT for pulmonary embolism.Methods A total of 270 patients with clinically suspected pulmonary embolism were selected.All pa-tients underwent dual-layer detector spectral CT examination.A single scan simultaneously acquired both conventional CT pulmo-nary angiography(CTPA)and spectral multi-parameter images.Multi-parameter analysis of the spectral CT images was per-formed,including iodine density measurements,spectral curve analysis,and effective atomic number determination.These re-sults were then compared with those from conventional CTPA and the comprehensive clinical diagnosis.Results The dual-layer detector spectral CT multi-parameter imaging had a high consistency with conventional CTPA in showing pulmonary artery emboli(Kappa=0.923,P<0.001),but it had unique advantages in aspects such as analysis of iodine distribution uniformity in emboli and evaluation of the perfusion status of the surrounding lung tissue.The iodine density,the shape of the energy spectrum curve and the effective atomic number of the emboli in patients with pulmonary embolism had extremely significant differences com-pared with those of normal lung tissues(P<0.001).Conclusion Multi-parameter imaging of spectral CT can provide more com-prehensive and accurate imaging information for patients with pulmonary embolism,which holds significant importance for im-proving diagnostic efficiency.
Keywords：TomographyX-ray computedPulmonary embolismIodine densityEffective atomic number
Publication Date：2026-01-30
Online Publishing Date：2026-03-20(First online date of this platform, not the publication date of the document)
Pages：5( 76-80 )