Variation of CT Values for Surface Enhanced Layers of Nasopharynx Wall and Detecting of the Best Scanning Time
- VernacularTitle:鼻咽壁表面线样强化层的CT表现和扫描时机探讨
- Author:
Tao ZHANG
;
Kecheng WANG
;
Hainan ZHANG
;
Guohui LING
;
Junqin PENG
;
Jian WANG
- Publication Type:Journal Article
- Keywords:
nasopharynx;
enhanced time;
tomography,X-ray computed
- From:
Journal of Practical Radiology
2001;0(10):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To probe into the variation of CT values of surface enhanced layers of nasopharynx wall,intensified regularity and choosing the best scanning time.Methods 138 patients received conventional plus enhanced CT scan and 58 cases of them received delayed and repeated scans.Results 83% of the cases were correspondent to the surface of nasopharynx and had manifest linear enhancement.After giving contrast injection,it reached 97% at the 74 second.All CT values of the cases were enhanced in the phase of 92～344 second.Conclusion The ratio of linear enhancement is manifestly high,which is very helpful to the CT diangosis of NPC restricted to or under the mucosa.The best acquisition time should be just before or after the 74 second,correspondent to the surface of nasopharynx.The enhancement lasted long.
