Study on MRI stereotactic coordinate system of head and localization map of central sulcus

ObjectiveTo study the stereotactic localization method based on standard head MRI, and verify the localization accuracy.

MethodsThe continuous head MRI scan data with Dicom 3.0 format of 31 cases were imported into eFlim 2.1 workstation, exported as JPEG format, then imported into Photoshop.The standard coordinate system was established by image size correction, image rotation and coordinate axis translation to make the system coordinate origin coinciding with brain origin point, and system Y-axis coincide with the intersynaptic wiring of brain.The coordinate values(X, Y) of the fault were obtained through the coordinate direct reading function of software, and the Z value was determined by product of the number of layers and thickness beyween two connected layers.During establishing stereotactic coordinate system, the coordinate value of the midpoint of posterior margin of anterior commissure, midpoint of leading edge of the posterior commissure, and distance between two points were used to calculate the length of interstitial diameter, which was compared with eFilm software direct measuring.

ResultsThe accurate three-dimensional stereotactic localization could be established using continuous MRI scan data in 31 cases, and the localization map was formulated.The interstitial diameter length detected by two methods was the same.

ConclusionsThe stereotactic localization method based on standard MRI can be used in studying the rolandic fissure.