Lung Imaging (IMAGE) Corewell Health Caption A single-photon emission computerized tomography (SPECT) scan uses a radioactive substance (Techne gas) and a special camera to create lung images. CT-derived functional imaging is a novel image processing method without the need for inhalation of special gas or injection of contrast. This image shows close similarities between areas of lung function obtained on same patient with CTFI and SPECT. Credit Corewell Health Usage Restrictions NA License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.