A study in The British Journal of Psychiatry reveals that scientists have identified a way to more accurately differentiate between bipolar disorder and unipolar depression. Doctors often misdiagnose bipolar disorder due to the presence of depressive symptoms in the bipolar disorder. The study examined 18 patients with bipolar-1 disorder, 18 patients with depression, and 18 healthy individuals and used Arterial Spin Labeling to detect brain blood flow patterns. They found that, using this technique, they could identify which patients were suffering from bipolar disorder and which were suffering from unipolar depression with 81% accuracy. These findings are promising for the future of bipolar disorder diagnoses.