The Role of Simple-phase Enhanced CT in Diagnosis of Hypopharyngeal and Laryngeal Carcinoma
- VernacularTitle:单期增强CT扫描在下咽癌和喉癌检查中的作用
- Author:
Shunyu GAO
;
Jichen WANG
;
Xuexiang JIANG
;
Yisheng WANG
;
Gangjian TANG
- Publication Type:Journal Article
- Keywords:
hypopharyngeal and laryngeal neoplasm;
tomography ,X-ray computed;
radiation dose
- From:
Journal of Practical Radiology
2001;0(08):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore if only single-phase enhanced CT can be used for pre-treatment staging of hypopharyngeal and laryngeal carcinoma.Methods The double phase enhanced CT images in 47 cases with hypopharyngeal or alryngeal carcinoma were retrospectively studied.CT number of tumor,vocal cord and sternocleidomastoideus muscle was measured on plain,early-phase,and late-phase enhanced CT scan,and the definition of tumor margins, small-vessel artifacts and mucous artifacts was recorded. The effective radiation dose of patients was calculated for 16DCT and HCT according to dose-length product (DLP).Results There was no significant difference between the density of tumor and the vocal cord on plain CT scan. There were more mucous artifacts and/or small-vessel artifacts in early-phase enhanced CT images. The definition of tumor margin in late-phase enhanced CT image was better than or almost same as that in early-phase enhanced CT image. The effective radiation dose with 16DCT was 1.5 times to that with HCT at the same scanning range. Conclusion Only late-phase enhanced CT imaging is recommended to be performed for the staging of hypopharyngeal or laryngeal carcinoma, and it will reduce the effective radiation dose received by patients.
