Abstract:

Abstract:Objective
To acquire some related data of surgical approach through brain superior temporal sulcus to temporal horn of lateral ventricle by MRI volume rendering,and to orientate the point of superior temporal sulcus on the lateral surface which is closest to temporal horn of lateral ventricle,and to find out the best entrance point of surgical approach through superior temporal sulcus to temporal horn of lateral ventricle.Methods 120 adult cases of MRI scanning specimens were chosen for measurement.MRI volume rendering technology was used to rebuild the brain 3D model for the measurement of the full length of superior temporal sulcus S1.Then cutting along the prependicular to the direction of the long axis of the temporal lobe with 1.0 mm spacings,the coronal sections were obtained,and the distance from superior temporal sulcus to temporal horn of lateral ventricle was ordinally  measured and the shortest distance S2 was made sure.And the depth of superior temporal sulcus S3 was detected.The corresponding point on the surface of the brain at superior temporal sulcus according to the point leading the shortest distance S4 was determined.The ratio of S4 to S1 M was calculated.The angle between the shortest distance and median sagittal plane as α was determined.All the samples were measured on both sides of the brain and all the data were compared.Results The S1 of the 120 cases was (159.56±17.55) mm on the left and (164.35±15.07) mm on the right，there was no statistical difference between two cerebral hemispheres(P>0.05）;the S2 was (8.18±0.96) mm on the left and (7.81±0.90) mm on the right,there was no statistical difference between two cerebral hemispheres(P>0.05）;the S3 was (12.19±1.43) mm on the left and (11.57±1.33) mm on the right,there was no statistical difference between two cerebral hemispheres(P>0.05）;the S4 was (100.88±16.09) mm on the left and (104.15±14.49) mm on the right,there was no statistical difference between two cerebral hemispheres(P>0.05）;the M was (0.63 ±0.07) on the left and (0.63 ±0.06) on the right,there was no statistical difference between two cerebral hemispheres(P>0.05）;the α was (55.80±3.64)° on the left and (56.46±4.17)° on the right,there was no statistical difference between two cerebral hemispheres(P>0.05）.Conclusion The point at the front side 3/5 of superior temporal sulcus may be the ideal surgical approach entrance point.The distance from the point to temporal horn of lateral ventricle is shortest.It indicates that the approach can reduce the damage  of brain tissue.

Key words: magnetic resonance imaging；volume rendering；superior temporal sulcus-temporal horn of lateral ventricle, surgical approach, optic radiation