A comparative study of ultra-high-resolution CT and multi-slice spiral CT showing the key sound transmission structures of the middle ear
10.16066/j.1672-7002.2025.04.005
- VernacularTitle:超高分辨率骨质CT与多层螺旋CT显示中耳关键传声结构的对比研究
- Author:
Yufei SUN
1
;
Ruowei TANG
;
Heyu DING
;
Ning XU
;
Zhaohui ZHONG
;
Zhenghan YANG
;
Zhenchang WANG
;
Pengfei ZHAO
Author Information
1. 首都医科大学附属北京友谊医院放射科,北京 100050
- Keywords:
Tomography,X-Ray Computed;
Incus;
Stapes;
Temporal Bone;
Anatomy;
ultra-high-resolution CT;
tomographic scanning technology
- From:
Chinese Archives of Otolaryngology-Head and Neck Surgery
2025;32(4):225-228,233
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVE To compare the ability of ultra-high-resolution CT(U-HRCT)and multi-slice spiral CT(MSCT)to display key vocal transmission structures in the middle ear.METHODS Subjects with normal middle ear structures who underwent 0.1 mm layer thickness U-HRCT and 0.625 mm layer thickness MSCT scans at the same time in Beijing Friendship Hospital affiliated to Capital Medical University from December 2019 to August 2024 were retrospectively enrolled.Two experienced head and neck radiologists reconstruct standard transsectional,coronal images based on the thinnest layer thickness.According to the 5-point method,16 key sound transmission structures of the middle ear,including malleus,incus and stapes,as well as joints,ligaments and tendons,were evaluated for image quality scoring.The standard deviation(SD)value,signal noise ratio(SNR),and contrast noise ratio(CNR)of bone in the malleus region and intratympanic gas were measured and calculated on the two examination images.RESULTS Thirty patients(47 sides)with normal middle ear structure were included,including 18 males and 12 females.The two physicians compared the results of U-HRCT in showing malleus head,malleus neck,malleus handle,incus body,long process,and short process,5 points accounted for 100%,and the 5-point scores of incudomalleolar joint space,incudostapedial joint space,stapes footplate and annular ligament were 100%,98.29%,75.83%and 77.83%,respectively,which were significantly higher than those of MSCT(P<0.001).In addition,U-HRCT showed higher scores for lenticular process,stapes head,anterior arch of stapes,posterior arch of stapes,annular ligament,stapes muscle,and tendo musculi tensoris tympani than MSCT(P<0.001),and the lenticular process showed a 100%display rate.There was no significant difference in the SNR between the two groups(P>0.05),but the SD value of the malleus in U-HRCT was 161.6±36.4,which was significantly lower than that in MSCT(297.8±128.1),and the difference was statistically significant(P<0.001).CONCLUSION U-HRCT can clearly visualize the key sound transmission structures of the middle ear,and its visualization ability is significantly better than that of MSCT.
