Abstract
Artifacts are a common source of error in single photon emission computed tomography (SPECT) and positron emission tomography (PET) imaging and can lead to false positive results and result in decreased diagnostic accuracy. SPECT and PET imaging artifacts are related to equipment failure, reconstruction or postprocessing errors, or patient-related factors. The most common artifacts on SPECT imaging are patient-related ones and include motion and soft tissue attenuation. The most common artifacts on PET imaging are related to patient motion and attenuation-correction errors primarily because of misalignment between the PET and transmission scan. Technologists and interpreting physicians must be aware of potential sources of artifact, how to detect and troubleshoot them, and, most importantly, how to prevent them from happening.
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