Ventilation/Perfusion SPECT for Diagnosis of Pulmonary Embolism and Other Diseases

Figure 5

Patient with heart failure. Sagittal slice on the left panel shows redistribution of perfusion towards anterior region; ventilation is less affected causing mismatch of non-segmental character. Right panel shows control after 10 days of treatment with normalization of ventilation and perfusion distribution but with new ventilation and perfusion defect in upper lobe due to pneumonia.