Sometimes it is quite easy to infer that someone may be experiencing suicidal thoughts - such a risk exists, for example, in people with major depressive disorder. However, it is currently impossible to get inside a patient's head and determine that he or she is actually having suicidal thoughts without them telling us. However, scientists from the United States have attempted to use imaging studies to determine whether someone is experiencing suicidal thoughts - and the results of their research seem quite promising.