SPECT/CT and pulmonary scintigraphy
None. It is not necessary to be fasting..
The examination takes place in 2 parts in 1 session (total duration 1 hr).
Inhalation of the radio-aerosol then acquisition of the ventilation imaging.
Intravenous injection of the radiopharmaceutical and then acquisition of the perfusion imaging.
If you are pregnant only the perfusion scintigraphic imaging of the lung will be performed. During the examination under the camera please remain motionless.
Main clinical indications
- Search for pulmonary embolism
- Preoperative assessment of the lung
The imaging is based, for the ventilation examination, on the inhalation of a radiolabelled aerosol, whose particles penetrate as far as the alveoli, and for the perfusion examination, on the intravenous injection of macroaggregates of labelled albumin lodged in the capillary vessels. The main indication is the search for pulmonary embolism visualized as a reduced activity in the perfusion phase in the presence of a normal ventilation in the same pulmonary territory on the scintigraphy. The analysis of the separate functions allows the prediction of the residual pulmonary function after lung resection surgery (pneumonectomy) or of a pulmonary lobe (lobectomy), by coupling with the forced expiratory volume (FEV) evaluated during the functional respiratory tests (spirometry).
Pulmonary embolism of the lower lobe of the right lung
Normal Ventilation (top Images) - Perfusion absent (bottom images).
Analysis of the separate functions (normal examination)