Three-D CT reconstruction of forehead horn puncture coronal plane of normal Chinese adults and measurement of parameters associated with ventrilcle puncture targeting its forehead horn

Abstract

Objective To measure the normal width of the lateral ventricle of normal Chinese adults on CT-based forehead horn puncture coronal plane, and explore the optimal puncture direction through the forehead horn of the ventricle. Methods Original brain CT data of 241 Chinese adults, admitted to our hospital from October 2014 to september 2015, were collected and divided into 4 groups based on their ages, which were groups of less than 44 years old, 45 to 59 years old, 60 to 74 years old and more than 75 years old. The coronal planes were reconstructed on the CT images based on the puncture routes of forehead horn of the ventricle. The width of ventricle on the puncture side in this plane was measured. The standard puncture point was 2.5 cm aside from the midline of the head. On the reconstructed coronal plane, the angle between the line of the standard puncture point to forehead horn of the ventricle and the sagittal plane was named as lateral opening angle(LOA). The angle between the line of standard puncture point to the septum vertices and the sagittal plane was named as maximal lateral opening angle(maxLOA). The angle between the line of standard puncture point to the outermost edge of the lateral ventricle and the sagittal plane was named as minimum lateral opening angle(minLOA). Results (1)In the coronal plane, the average width of one side of the lateral ventricle was 15.68 ± 3.66 mm, with 95% confidence interval of 15.21-16.15 mm. The width of one side of lateral ventricle in the 45 to 59 years old group was(15.22±3.12)mm and that in the 60 to 74 years old group was(15.92±3.42)mm; no significant difference was noted between the two groups(P>0.05); that in the group of lees than 44 years old had the minimal width of one side of lateral ventricle([13.51±3.46]mm)and the group of more than 75 years old had the maximal one([18.52±2.98]mm), and the difference was significant between the two groups(P 0.05); the minLOA was 6.07°±3.66° showing a decreasing trend when the age increased(the group of less than 44 years old: 8.02°±3.32°; group of more than 75 years old: 3.21°± 3.42°). Conclusions The normal ventricle width increases with the age changes, while the LOA decreases with the age increases. The optimal LOA ranging from 6.07°-17.67° will ensure the successful puncture to the ventricle forehead horn. Key words: Three-dimensional reconstruction; Lateral ventricle; Frontal angle; Coronal plane; Width of ventricle; Simulated puncture