Measurement of olfactory sulcus and olfactory bulb by brain magnetic resonance imaging

WANG Chengbo; FENG Yong; ZHOU Lianzhong; ZHANG Jinfeng

Abstract：Objective To investigate the correlation between olfactory sulcus depth(OSD)and olfactory bulb volume(OBV)in normal olfactory males.Methods After inquisition of medical history,examination of nasal cavity,MRI of brain structure was performed immediately after normal olfactory detection.OSD measurement was performed on coronal T2-weighted brain MR images and Box-frame method(BF)was used to measure OBV for statistical analysis.Results The depth of male left olfactory sulci(OSD)was 1.28 cm,the depth of right olfactory sulci(OSD)was 1.39 cm,the volume of left olfactory bulb(OBV-L)was 21.10 mm3,the volume of right olfactory bulb(OBV-R)was 23.71 mm3.The measurement value of left and right OSD was com-pared(t=0.739,P<0.05).Left olfactory sullen depth(OSD-L)was correlated with right olfactory bulb volume(OBV-R)(t= 0.350 P<0.05),and right olfactory sullen depth(OSD-R)was correlated with right olfactory bulb volume(OBV-R)(t=0.525 P<0.05),the depth of left olfactory sulcus(OSD-L)was correlated with the depth of right olfactory sullen(OSD-R)(t=0.777 P<0.05),and the volume of left olfactory bulb(OBV-L)was correlated with the volume of right olfactory bulb(OBV-R)(t=0.739 P<0.05).Conclusion The dominance of olfactory structure is formed from children to adults,and the lateralization of OS and OB gradually appears with age.The right olfactory bulb may be related to the bilateral olfactory sulcus in the connection of olfac-tory afferent and central efferent centrifugal nerve.