Stress | Incorrect agent or protocol |
| Submaximal stress |
| Drug treatment—for example, use of antagonists (if the study is done for diagnostic purposes) |
Radiopharmaceutical administration | Inadequate activity for patient weight/size |
| Misadministration (for example, extravascular injection) |
Image acquisition | Inadequate camera positioning or orbit selection |
| Inappropriate energy window selection or collimation |
| Patient comfort and motion |
| External attenuating objects or inadequate breast strapping |
| Incorrect ECG gating |
Image reconstruction and processing | Inappropriate filtering or reconstruction technique |
| Inaccurate definition of long axis of left ventricle |
Image display | Inappropriate colour/grey scale or incorrect windowing |
| Comparison of non-equivalent tomograms |