J Psychiatry Neurosci 2009; 34(5): 343-349
Glenda M. MacQueen, MD, PhD
MacQueen — Department of Psychiatry, Faculty of Medicine, University of Calgary, Calgary, Alta.
Whether magnetic resonance imaging studies can provide useful information to clinicians who treat people with major depressive disorder remains to be established. There are, however, several recent findings that suggest that likelihood of response may be predicted by imaging findings. For example, morphometric studies have examined whether hippocampus volume is associated with clinically meaningful outcomes such as response to treatment. In general, patients who remit have larger pretreatment hippocampus volumes bilaterally compared with those who do not remit. There are similar preliminary findings for the anterior cingulate cortex. There are also a number
of functional imaging studies that have identified different activity patterns in those who are likely to respond to treatment compared with those who are not. Using positron emission tomography, investigators have reported different patterns of response to treatment in those treated with medication compared with those treated with psychotherapy. Some of the potential barriers to the routine use of imaging in psychiatric practice are reviewed briefly.
Submitted Jan. 20, 2009; Revised Apr. 6, 2009; Accepted Apr. 24, 2009.
Competing interests: None declared.
Correspondence to: Dr. G.M. MacQueen, Department of Psychiatry, Foothills Hospital, 29th St. NW, Calgary AB T2W 2T9; firstname.lastname@example.org