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MR imaging of pneumonia in immunocompromised patients: comparison with helical CT
C C Leutner1, J Gieseke, G Lutterbey
1Department of Radiology, University of Bonn, Germany.
Objective:
A T2-weighted turbo spin-echo sequence was compared with CT in immunocompromised patients with opportunistic pneumonia.
Subjects And Methods:
Sixteen patients with pneumonia shown on helical CT were examined using MR imaging within 2 days. MR examinations were performed on a 1.5-T system with a transversal T2-weighted ultrashort turbo spin-echo sequence using expiratory gating and diastolic triggering. Two radiologists reviewed the MR and CT images independently. The number, localization, and morphology of lesions were noted. MR image quality was rated using a 4-point scale.
Results:
The results of the CT and MR examinations concerning the number and morphology of pulmonary lesions caused by pneumonia were identical in 75% of the patients (n = 12). MR imaging was able to depict all typical features of pneumonia including different stages of parenchymal infiltration (ground-glass versus consolidation). MR imaging depicted early necrotizing pneumonia not shown on contrast-enhanced CT in 25% of the patients (n = 4); 82% of the MR examinations were rated as excellent (1 point) or good (2 points).
Conclusion:
T2-weighted turbo spin-echo imaging is able to depict characteristic features of pneumonia and shows excellent results compared with CT. This MR technique offers advantages in patients with pneumonia because of its higher sensitivity for necrotizing pneumonia.
Insights
T2-weighted magnetic resonance (MR) imaging accurately depicts pneumonia features in immunocompromised patients, showing excellent results compared to CT scans. This MR technique offers higher sensitivity for detecting early necrotizing pneumonia.
Area of Science:
- Radiology
- Medical Imaging
- Pulmonology
Background:
- Opportunistic pneumonia poses diagnostic challenges in immunocompromised patients.
- Computed tomography (CT) is a standard imaging modality for pneumonia.
- Magnetic resonance (MR) imaging offers potential advantages in visualizing lung pathology.
Purpose of the Study:
- To compare the diagnostic performance of T2-weighted turbo spin-echo MR imaging with CT for opportunistic pneumonia.
- To evaluate MR imaging's ability to characterize pulmonary lesions in immunocompromised patients.
Main Methods:
- Sixteen immunocompromised patients with CT-diagnosed pneumonia underwent MR imaging within 2 days.
- A 1.5-T MR system with a T2-weighted ultrashort turbo spin-echo sequence was used, incorporating expiratory gating and diastolic triggering.
- Two radiologists independently assessed MR and CT images for lesion number, localization, and morphology, rating MR image quality on a 4-point scale.
Main Results:
- MR and CT findings for lesion number and morphology were identical in 75% of patients (n=12).
- MR imaging successfully depicted all pneumonia features, including various stages of parenchymal infiltration (ground-glass and consolidation).
- MR imaging identified early necrotizing pneumonia in 25% of patients (n=4) not visible on contrast-enhanced CT; 82% of MR exams were rated excellent or good.
Conclusions:
- T2-weighted turbo spin-echo MR imaging effectively visualizes characteristic pneumonia features with excellent performance compared to CT.
- This MR technique demonstrates superior sensitivity for detecting necrotizing pneumonia, offering a significant advantage in patient management.