Collateral Sulcus: Computational Sectional Imaging Anatomy And Three-dimensional Visualization

Background: With the adanced develop of the mirconeurosurgical andneuroimaginging technology, contemporary neurosurgery has changed from thetraditional classical neural surgery craniotomy to the individual minimally invasivesurgical approach, which centers on the lesion, and precisely locating the lesionpreoperatively is the basia of the minimally invasive surgery. Since recent years,because of the quickly development of tachoprgress of functional neurosurgery andmicroneurosurgery on account of stereotaxis technology, we will research intensivelysectional imaging anatomy of cortical sulci in cerebral lamellar MRI image to expectit can offer important help for locating tiny occupying lesion in cerebrum precisely.Collateral sulcus (STS) is the most constant sulcus of cerebral cortex, it loates atthe cerebral bottom surface, which is the demarcation of the parahippocampal gyrusand the medial tempoccipital gyrus. Posteriorly, it continues into the occipital lobe,which is divide fusiform gyrus into parahippocampal gyrus.There are some importantcortical functional zones and the temporal branches of the PCA cross theparahippocampal gyrus and pass into the collateral sulcus. There are some importantstructures around the the collateral sulcus, for instance, the temporal horn,hippocampus, amygdale, lateral ventricle etc. The regions have a predilection for thecerebral tumors, inflammation and vascular lesions. To accurately indentify and lacatethe collateral sulcus in three-dimension space is the precondition for microsurgery orsterotactic.There are many domestic and overseas scholars who have done research intoappearance, segmentation and type of collateral sulcus, but there is no unified findingnow. However, researching on the accurate three-dimensional location and construction of three-dimensional visualization of the collateral sulcus in cerebrumhave been rarely reported. Accordingly, aim directly at above-mentioned, We havedone some research and statistical analysis and obtained some conclusions on thebasis of the study of male and female20cases of heath-adult head MRI. We hope ourfinding would offer quantized anatomic data for research on developing regularity ofthis cerebral region, individual and hemispheric variance, relationship berweenarchitecture and function of collateral sulcus, as well as stereotaxis and microinvasionpsychosurgery in this area.Objective: The purposes of this study are to research the morphology of collateralsulcus on MR imagem, to establish a spatial for the most inferior points of collateralsulcus in the Descartes coordinate system and obtain the fitting curvilinear equation ofthe most inferior points of collateral sulcus, to reconstruct3D visualizational model ofthe collateral sulcus, which can provide anatomical information of collateral sulcusfor stereotactic, interventional radiology, microsurgical.Methods:1.40cases of the health of ordinary people volunteer brain, male20cases,20cases of female cross, sagittal and coronal–sectional MRI data which were scannedaccording the AC-PC line are imported to eFilm workstation in the form of Dicom3.0,then morphorlogy character were observed by the technology of the“three-dimensional coursor” and located collateral sulcus in2mm continuoustransverse and coronal MR image and statistics results were acquired.2. Male and female coronal-sectional layer of20healthy adult brain MRI datawas imported into Photoshop CS by from transition. Through the strict registration ofthe image, we can make the coordinate system of the software coincide with thesystem based on AC-PC line. From the most inferior point of the collateral sulcus onthe coronal, recording the coordinates of the point(Z,X), Y values can be get throughproduct of multiplition of the thickness and numble of the layers. All point samples ofthe inferior point of collateral sulcus in the three-dimensional coordinates can be getfinally. Get the fitting curvilinear equation of the collateral sulcus projection on the allplanes by SPSS17.0.3. One normal adult head coronal-sectional MRI is imported into3D-Doctor workstation on a microcomputer, segmented collateral sulcus, lateral ventricle, the telencephalon with different color, reconstructing the cerebral collateral sulcus tri-dimension with method of surface reconstruction.Results:1. The collateral sulcus can be accurately indentified on thin tranverse and coronal sectional MRI images by "three-dimentional coursor", and we can obtain the shape and location regularity of the collateral sulcus.2. The three-dimensional anatomy data set of the most inferior point of the collateral sulcus have been constructed in the three-dimensional coordinates; The fitting curvilinear equations of the most inferior point of the collateral sulcus projection on the all planes as following:(1)on the cross-section male on the right: X=-24.871-1.88Y (R=0.639,R2=0.408,F=415.778,p<0.001) female on the right:X=-28.053-0.386Y-0.003Y2(R=0.535,R2=0.286,F=99.818, P<0.001)male on the left:X=-28.053-0.386Y-0.003Y2(R=0.535,R2=0.286,F=99.818,P<0.001) female on the left:X=24.431+0.052Y-0.002Y2(R=0.563,R2=0.317,F=138.819, P<0.001)(2)on the sagittal-sectionmale on the right:Z=-24.756-0.517Y-0.003Y2(R=0.746,R2=0.556,F=377.834, P<0.001) female on the right:Z=-30.618-0.86Y-0.007Y2(R=0.815,R2=0.664,F=491.616, P<0.001) male on the left:Z=-23.375-0.577Y-0.005Y2(R=0.817,R2=0.668,F=663.096, P<0.001) female on the left:Z=-26.806-0.755Y-0.006Y2(R=0.853,R2=0.727,F=795.737, P<0.001)(3)on the coronal-sectionmale on the right:Z=-2.872-0.463X-0.07X2-0.001X3(R=0.689,R2=0.475,F=181.388, P<0.001) female on the right:Z=-8.18-1.698X-0.139X2-0.002X3(R=0.64,R2=0.41,F=115.148, P<0.001)male on the left:Z=-2.58-0.157X-0.015X2(R=0.521,R2=0.271,F=122.05,P<0.001) female on the left:Z=-2.223+1.171X-0.128X2+0.002X3(R=0.541,R2=0.0.293, F=68.892, P<0.001)3. We have gotten a visualization reconstruction model of the collateral sulcus in the whole brain, replaying their shape and location in vivo brain. Furthermore, reconstructed collateral sulcus could be made serial inclined planes from random orientations or angles, and rotated by random angles.Conclusions:1. The technology of the "three-dimensional coursor" on the basis of the study of eFilm workstation on a microcomputer combined with the typical characteristic indentification of the collateral sulcus helps indentify the collateral sulcus accurately in2mm continuous transvers and coronal MR image. These conclusions will offer macro-anatomy information for research on hemispheric asymmetry, human brain developing and cortex folding regularity, as well as relationship between architecture and function.2. The three-dimensional anatomy data set of the inferior point of the collateral sulcus will provide anatomy foundation for stereotactic surgery on the development of surgical approach and interventional radiology in the area of the collateral sulcus; the fitting curvilinear equation of the most inferior point of the collateral sulcus projection on the all planes will contribute to research on the anthropology and body metrology, and will also help reveal secret of human brain.3.3D visualization of the collateral sulcus in vivo brain can display three-dimensional struction of the collateral sulcus, the relationship with their neighbor structures and have great clinical value in sterotactic surgery, the development of surgical approach and interventional radiology. This model can be also applied in the anatomy teaching.