False-colour gamma camera scan (scintigram) showing the blood circulation in both normal human lungs (anterior view). The image is a map of the distribution of radioactivity,recorded by an external gamma camera,from a radioactive tracer which is injected intravenously prior to taking the scan. The tracer consists of microspheres tagged with the radioisotope technetium-99m. The radioactive microspheres are small enough to pass into the capillaries of the lung. The technique is used in the diagnosis of pulmonary embolism,where the pulmonary circulation becomes obstructed by a blood clot (an embolus) | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / MEDICAL PHYSICS, RVI, NEWCASTLE UPON-TYNE / SIMON FRASER |
Bildgröße: | 4539 px × 3161 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |