No continuing education / Category A credit assigned to this presentation.
Conventional gamma cameras rotate slowly about a patient to acquire the projections needed to create a 3D image of the injected radiotracer. Typical acquisition times are ten minutes or more which is too slow to capture the dynamic behaviour of many physiological processes. Because of this, dynamic imaging of single-photon emitting radiotracers has been mostly restricted to planar acquisitions. The introduction of solid state gamma camera detectors based on cadmium zinc telluride (CZT) has allowed the design of gamma cameras that are stationary but still capable of 3D imaging. These new cameras open the door to dynamic SPECT for which the first major application has been cardiac imaging. Dynamic cardiac SPECT makes possible measurement of absolute myocardial blood flow which enhances diagnostic accuracy in the case of multi-vessel disease. This presentation will describe the new camera designs made possible with CZT detectors and highlight work being done at the University of Ottawa Heart Institute to develop clinical SPECT imaging of absolute myocardial blood flow.
- Participants will be able to describe the design of CZT-based dynamic SPECT cameras
- Participants will be able to discuss the current accuracy of SPECT myocardial bood measurement