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Pulmonary metastases: MR imaging with surgical correlation--a prospective study
I M Feuerstein1, D L Jicha, H I Pass
1Department of Diagnostic Radiology, National Institutes of Health, Bethesda, MD 20892.
Radiology
|January 1, 1992
Summary
Magnetic resonance (MR) imaging accurately detects pulmonary metastases in patients undergoing surgery. This imaging technique shows high sensitivity for identifying lung nodules, outperforming chest radiography.
Area of Science:
- Radiology
- Oncology
- Medical Imaging
Background:
- Pulmonary metastases detection is crucial for curative resection planning.
- Accurate imaging is essential to identify all metastatic nodules.
- Previous methods like chest radiography have limitations in sensitivity.
Purpose of the Study:
- To evaluate the sensitivity of magnetic resonance (MR) imaging for detecting pulmonary metastases.
- To compare MR imaging with computed tomography (CT) and chest radiography.
- To determine the effectiveness of different MR sequences for nodule detection.
Main Methods:
- Prospective, controlled study involving 11 patients with pulmonary metastases.
- Comparison of MR imaging (0.5 T) with chest radiography, CT, and thoracotomy in 12 cases.
- Blinded interpretation of all imaging studies.
Main Results:
- MR imaging correctly identified all patients with pulmonary nodules (100% sensitivity).
- Computed tomography (CT) also achieved 100% detection by design.
- MR imaging demonstrated significantly higher sensitivity than chest radiography (P2 < .01).
- Short inversion time inversion-recovery MR sequences showed the highest sensitivity for individual nodules (82%).
Conclusions:
- MR imaging is a highly sensitive tool for detecting pulmonary metastases.
- MR imaging is at least as sensitive as CT and superior to chest radiography for nodule detection.
- Specific MR sequences, like short inversion time inversion-recovery, enhance nodule detection capabilities.