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Dual Energy CT lung perfusion imaging--correlation with SPECT/CT
S F Thieme1, V Graute, K Nikolaou
1Department of Clinical Radiology, Ludwig Maximilians University, Klinikum Grosshadern, Marchioninistr 15, D-81377 München, Germany. sven.thieme@med.lmu.de
European Journal of Radiology
|December 28, 2010
Summary
Dual Energy CT (DECT) accurately detects pulmonary perfusion defects and shows potential to improve diagnosis of pulmonary embolism (PE). DECT achieved 100% sensitivity and specificity for PE detection.
Area of Science:
- Radiology
- Medical Imaging
- Pulmonary Medicine
Background:
- Pulmonary embolism (PE) diagnosis relies on imaging techniques.
- Assessing pulmonary perfusion is crucial for diagnosing PE.
- Dual Energy CT (DECT) offers advanced imaging capabilities.
Purpose of the Study:
- To evaluate the diagnostic accuracy of DECT in detecting pulmonary perfusion defects.
- To assess DECT's potential to enhance sensitivity for PE detection.
Main Methods:
- 15 patients underwent DECT pulmonary CT angiography (DE CTPA) and SPECT/CT with ventilation scintigraphy.
- DECT iodine maps and SPECT perfusion images were analyzed for defects.
- Diagnostic accuracy was compared against a consensus reading of all modalities.
Main Results:
- DE CTPA demonstrated 100% sensitivity and specificity for acute PE.
- DECT iodine maps showed 76.7% sensitivity and 98.2% specificity for perfusion defects.
- SPECT/CT with ventilation scintigraphy had 85.7% sensitivity and 87.5% specificity for PE.
Conclusions:
- DECT accurately identifies pulmonary perfusion defects.
- DECT shows promise in improving the diagnostic accuracy for pulmonary embolism.
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