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MR Imaging of Pneumonia in Immunocompromised Patients

Comparison with Helical CT

¹ Department of Radiology, University of Bonn, Bonn, Germany.
² Philips Medical Systems, Eindhoven, The Netherlands.
³ Department of Internal Medicine, University of Bonn, 53127 Bonn, Germany.
⁴ Department of Pathology, University of Bonn, 53127 Bonn, Germany.

View larger version (139K): [in a new window]   Fig. 1A. —27-year-old man with pulmonary tuberculosis and bronchogenic spread. MR image (A) and CT scan (B) show small nodules (arrow, A) and cavitation (arrowhead, A) in left upper lobe.

View larger version (115K): [in a new window]   Fig. 1B. —27-year-old man with pulmonary tuberculosis and bronchogenic spread. MR image (A) and CT scan (B) show small nodules (arrow, A) and cavitation (arrowhead, A) in left upper lobe.

View larger version (120K): [in a new window]   Fig. 2A. —61-year-old woman with leukemia and biopsy-proven invasive pulmonary aspergillosis. Chest radiograph obtained 1 day before CT and MR images shows unclear finding in left upper lobe that is suspected to be early pneumonia.

View larger version (146K): [in a new window]   Fig. 2B. —61-year-old woman with leukemia and biopsy-proven invasive pulmonary aspergillosis. MR image shows one of two lesions with "reverse-target" sign (arrow) in left upper lobe, indicating necrotizing pneumonia.

View larger version (110K): [in a new window]   Fig. 2C. —61-year-old woman with leukemia and biopsy-proven invasive pulmonary aspergillosis. Corresponding contrast-enhanced CT scan obtained 18 hr before B reveals dense consolidation but no sign of necrotizing lesion.

View larger version (121K): [in a new window]   Fig. 3A. —71-year-old man with leukemia and multiple autopsy-proven necrotizing lesions caused by invasive aspergillosis. Chest radiograph obtained 1 day before CT and MR images shows lesions that are suggestive of early pneumonia in right lower lung.

View larger version (98K): [in a new window]   Fig. 3B. —71-year-old man with leukemia and multiple autopsy-proven necrotizing lesions caused by invasive aspergillosis. MR image shows multiple lesions with "reverse-target" sign in right lower lobe (arrows), indicating necrotizing pneumonia.

View larger version (95K): [in a new window]   Fig. 3C. —71-year-old man with leukemia and multiple autopsy-proven necrotizing lesions caused by invasive aspergillosis. Contrast-enhanced CT scans at window setting for mediastinum (C) and lung parenchyma (D) obtained immediately before B reveal all lesions as solid enhancing nodules. There is no sign of necrotizing pneumonia.

View larger version (110K): [in a new window]   Fig. 3D. —71-year-old man with leukemia and multiple autopsy-proven necrotizing lesions caused by invasive aspergillosis. Contrast-enhanced CT scans at window setting for mediastinum (C) and lung parenchyma (D) obtained immediately before B reveal all lesions as solid enhancing nodules. There is no sign of necrotizing pneumonia.

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