title: [Flow imaging of residual neck lymph nodes in nasopharyngeal carcinoma by contrast-enhanced ultrasonography after radiotherapy].
abstract: OBJECTIVE
  To explore the value of flow imaging with contrast-enhanced ultrasound for residual neck lymph nodes in nasopharyngeal carcinoma after radiotherapy.
  
  
  METHODS
  Blood flow imaging of 50 residual cervical lymph nodes in 36 patients with nasopharyngeal carcinoma after radiotherapy was observed and compared by color doppler ultrasound and contrast-enhanced ultrasonography.
  
  
  RESULTS
  In the 50 remaining lymph nodes in the neck, 40 blood flow signals were increased, 10 did not significant change by contrast-enhanced ultrasonography. The blood flow in residual lymph nodes by contrast-enhanced ultrasonography was richer than that by color doppler ultrasound. There was a significant difference in the blood flow signals between contrast-enhanced ultrasonography and color doppler ultrasound (chi(2)=49.172, P<0.01).
  
  
  CONCLUSIONS
  Contrast-enhanced ultrasonography can help blood flow imaging of the residual lymph nodes in nasopharyngeal carcinoma after radiotherapy, which may provide the imaging basis for clinical diagnosis and treatment.
authors.affiliation: Department of Radiology, Xiangya Hospital, Central South University, Changsha 410008, China.
authors.forename: Haifeng
authors.initials: H
authors.lastname: Liu
authors.forename: Jidong
authors.initials: J
authors.lastname: Xiao
mesh_terms: D000328:Adult; D000368:Aged; D003287:Contrast Media; D005260:Female; D006801:Humans; D008198:Lymph Nodes / Q000098:blood supply*; D008207:Lymphatic Metastasis / Q000000981:diagnostic imaging* / Q000473:pathology / Q000532:radiotherapy; D008297:Male; D008875:Middle Aged; D009303:Nasopharyngeal Neoplasms / Q000098:blood supply / Q000000981:diagnostic imaging* / Q000532:radiotherapy; D009333:Neck; D012039:Regional Blood Flow; D018615:Ultrasonography, Doppler, Color
chemical_list: D003287:Contrast Media