摘要
目的探讨高场MRI上下咽部环后区的正常影像解剖结构以及正常结构与年龄和性别之间的相关性,为临床早期发现下咽部病变提供帮助。方法搜集111名正常成人志愿者下咽部MRI图像资料,以10岁为一个年龄组,共分为5个组。观察环后区黏膜层、黏膜下脂肪层、下咽腔及环后区周围毗邻脂肪组织的显示情况。将环后区分为环状软骨上部、中部及下部层面,测量正中矢状面上环后区前壁厚度、后壁厚度、前后径和横径。对所得数据进行统计学分析,P<0.05为差异有统计学意义。结果环后区前壁由低年龄组向高年龄组逐渐增厚。后壁的厚度较前壁厚约1.1 mm,3.5 mm和1.9 mm分别为后壁和前壁的上限值。前后径若>7.0 mm就应高度重视是否存在异常。横径从环状软骨上部层面至下部层面依次变小(F=52.98,P<0.01)。前后径及横径在性别之间的差异具有统计学意义(前后径t=2.16,2.01,3.15;P<0.05。横径t=8.74,10.32,11.23;P<0.01)。黏膜层、黏膜下脂肪层、下咽腔以及周围毗邻脂肪组织的显示情况随环状软骨层面的不同而有所变化。结论在高场MRI上可以很好地显示环后区的正常解剖结构。熟悉环后区的正常影像解剖对于早期发现下咽部病变或邻近病变侵犯均具有十分重要的意义。
Objective To study the normal anatomy of hypopharynx postcricoid area in different age and sex, in order to detect subtle lesions of hypopharyngeal and provide early treatment. Methods MRI images of 111 normal adult volunteers （ 22 to 80 years） were collected prospectively in this study. The volunteers were divided into five groups according to every 10 years. All the volunteers performed 3.0-T MRI scan and images of axial FSE sequence TIWI, T2WI, and T2WI with fat suppression were obtained. The postericoid region was divided into the upper portion of the cricoid at the crieoarytenoid joint level, middle portion of the cricoid cartilage, and inferior portion of the cricoid cartilage. The anterior wall thickness, posterior wall thickness, anteroposterior diameter, transverse diameter were measured on MR imagings. The layers of the musculature, intramural fat planes, mucosa planes, pharynx cavity and adjacent fat planes were evaluated. The obtained data were analyzed with SPSS 17.0, P 〈 0.05 was considered statistically significant. Results The anterior wall of the postcricoid area was gradually thickened with ages. Great attention should be taken to the existence of anteroposterior diameter greater than 7. 0mm. Posterior wall tended to be about 1.1 mm thicker than anterior wall, and the upper limits of posterior wall and anterior wall were 3.5mm and 1.9mm respectively. In the middle portion of the postcricoid region, the postcricoid anterior wall, posterior wall, and anteroposterior diameter were slightly smaller than the other two levels. The transverse diameter from the upper level to the lower level became gradually smaller（ F = 52. 98, P 〈 0.01 ）. The differences of anteroposterior diameter and transverse diameter between the sexes were statistically significant（ anteroposterior diameter t = 2. 16, 2.01, 3.15 ; P 〈 0.05） （transverse diameter t = 8.74, 10. 32, 11.23 ; P 〈 0.01 ）. The visibility of the intramural fat planes, mucosa layer, hypopharynx cavity, and the adjacent fat planes were changed with the level of the cricoid. Conclusion The high-field MRI may be a good examination method to observe the normal anatomical structure of the postcricoid area. Being familiar with the imaging anatomy of the normal postcricoid portion of hypopharynx is essential for early detection of hypopharyngeal diseases or invasion of the hypopharynx by adjacent lesions.
出处
《临床放射学杂志》
CSCD
北大核心
2013年第4期480-485,共6页
Journal of Clinical Radiology
关键词
下咽部
环后区
环状软骨
磁共振成像
Hypopharynx
Postcricoid area
Cricoid
Magnetic resonance imaging
