[Errors in interpretation of myocardial perfusion scintigrams with 201thallium due to poor quality scans (author's...

Five myocardial scintigrams are shown, where there were difficulties in interpretation. In the first three examples, there was excessive distance of the collimator from the heart, resulting in poor quality scintigrams and leading to possible misinterpretation. Two further myocardial scintigrams are shown in patients who had eaten before the scan. In a further patient, there was insufficient cardiac ergometric stress. The problem is discussed briefly.