This beautiful picture is what nuclear cardiology is like. Doctors can assess the presence or absence of myocardial ischemia as well as myocardial infarction if they are an expert in the filed of nuclear cardiology. On top of that, the extent and severity of myocardial damages, if any, can be assessed.
I would say, however, there are many cardiologists who are not good at this filed, although nuclear cardiology is very useful in making a decision among patients with known or suspected ischemic heart disease. Some fuzzy features exist on nuclear cardiology, which seems to make doctors stay away from this category.
Another problem is that it takes a while (e.g., 4 hours) and costs a lot (e.g., $700) to undergo nuclear cardiology.