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Experimental pulmonary emboli detected using magnetic resonance
Radiology
|November 1, 1984
Summary
Magnetic resonance (MR) imaging shows potential for detecting small pulmonary emboli in dogs, with 63% detection rates. Further clinical trials in patients are recommended.
Area of Science:
- Radiology
- Medical Imaging
- Pulmonary Embolism Research
Background:
- Pulmonary embolism (PE) is a significant cause of morbidity and mortality.
- Accurate and early detection of PE is crucial for effective treatment.
- Computed tomography (CT) is a standard imaging modality, but magnetic resonance (MR) offers potential advantages.
Purpose of the Study:
- To evaluate the efficacy of magnetic resonance (MR) imaging in detecting experimental pulmonary emboli.
- To compare MR imaging findings with computed tomography (CT) in a canine model.
Main Methods:
- Experimental pulmonary emboli were created and introduced into dogs.
- Transverse axial MR images and CT scans were acquired.
- MR imaging used spin echo techniques, gated to the cardiac cycle.
Main Results:
- CT identified 19 sites of embolism.
- Two observers detected 12 of 19 emboli (63%) on MR images, with one false positive each.
- Central emboli were more challenging to detect, with several false negatives attributed to their location.
Conclusions:
- MR imaging demonstrates potential for visualizing small pulmonary emboli.
- Further investigation with clinical trials in patients is warranted to confirm MR's utility in diagnosing PE.