Objective To explore the change of olfactory bulb (OB) volume in patients with Alzheimer disease (AD) and assess the value of high-resolution magnetic resonance imaging (MRI) in measuring OB volume.
Methods Fourteen AD patients and 25 normal aging volunteers (control group) underwent high-resolution MRI imaging of OB and the OB volume was measured.
Results The OB volume in AD patients(32.2±7.7) mm3 was significantly smaller than that in control group(40.6±6.6) mm3(P=0.002). The OB volume in AD patients didn't correlate significantly with their mini-mental state examination (MMSE) scores (P=0.205).
Conclusions AD patients show more prominent OB atrophy than normal aging volunteers do, which is in agreement with the pathological findings. High-resolution MRI is valuable in identifying the change of OB volume and therefore might be beneficial for AD diagnosis.