Feasibility study of ethmoidal foramen in the medial wall of the orbit based on 10 μm ultra-high resolution CT
10.16066/j.1672-7002.2024.10.008
- VernacularTitle:10 μm超高分辨率CT显示眼眶内壁筛孔的可行性研究
- Author:
Xiwen WANG
1
;
Ping WANG
;
Yongxian ZHANG
;
Yue KANG
;
Yue SHI
;
Yunfu LIU
;
Zhaohui LIU
Author Information
1. 首都医科大学附属北京同仁医院放射科,北京 100730
- Keywords:
Tomography,X-Ray Computed;
ethmoidal foramen;
image quality
- From:
Chinese Archives of Otolaryngology-Head and Neck Surgery
2024;31(10):647-651
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVE To investigate the feasibility of ultra-high resolution CT(U-HRCT)in demonstrating and evaluating ethmoidal foramen in the medial wall of the orbit.METHODS Nine cadavers(18 side orbits)fixed in 10%buffered formalin were enrolled and underwent U-HRCT and multislice helical CT(MSCT).Subjective and objective evaluations of image quality were performed by two experienced radiologists independently.Anterior,middle,and posterior ethmoidal foramen(AEF,MEF,and PEF)were recorded and the distance among them was measured.RESULTS The results of subjective and objective evaluations were not significant differences between evaluators and consistency was strong.CNR of U-HRCT and MSCT were 43.09±8.87 and 11.04±0.66 and SNR were 2.13±1.45 and 0.55±0.13,respectively.CNR and SNR of U-HRCT were significantly higher than MSCT(P<0.05).Objective scores of the U-HRCT and MSCT groups were 10.00 points(9.00 points,10.00 points)and 6.00 points(5.75 points,7.00 points).Objective scores of the U-HRCT were higher than MSCT(P<0.05).All eighteen AEF were shown by U-HRCT and MSCT.Among 18 PEF showed by U-HRCT,17 of them demonstrated by MSCT,and no significant difference was found in the display rate between groups(P>0.05).Nine MEF(7 single hole and 2 double holes)were found by U-HRCT,but only 2 of them were shown by MSCT.The MEF display rate of U-HRCT was higher than MSCT(P<0.05).The distance from MEF to AEF,from MEF to PEF,and from AEF to PEF were(9.43±1.13)mm,(4.75±1.09)mm,(14.18±1.14)mm,respectively.CONCLUSION U-HRCT is better to evaluate ethmoidal foramen than MSCT.It could be used to show the number and position of ethmoidal foramen before surgery to avoid complications.
