关键词: 下咽癌；图像后处理，计算机辅助；体层摄影术，X线计算机

Abstract:

Objective     To evaluate the clinical application of MDCT after-treatment technology in the evaluation of hypopharyngeal carcinoma and its invasibility． Methods      Twenty-three patients with hypopharyngeal carcinoma confirmed by pathology underwent CT scans. Images of axial, multiplaner reconstruction (MPR) and transparent 3D volume rendering technique (VRT) of all patients were retrospectively analyzed. Results     Of 23 cases, there was abnormal soft tissue shown in axial images, including 8 cases of visible laryngeal cartilage destruction and 13 cases of visible cervical lymph node metastases. Also, MPR and transparent VRT reconstruction demonstrated 17 cases of distorted, narrowed, or even an absent piriform sinus. Conclusion     CT axial images combining MPR and transparent VRT reconstruction can accurately and directly  show infiltrations of hypopharyngeal carcinoma .

Key words: Hypopharyngeal carcinoma； Image postprocessing， computer assisted； Tomography， X-ray computed