Study of scanning method of T 1WI_Star_VIBE_FS in MRI simulation of neck radiotherapy / 中华放射肿瘤学杂志

Objective:To compare and analyze the image quality, signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) of T 1WI_Star_VIBE_FS sequence in MRI simulation of neck tumors with different scanning methods, aiming to determine the optimal scanning method. Methods:A retrospective analysis of 78 patients receiving MRI contrast scan was performed. All patients were randomly divided into three groups according to three different scanning methods including bolus mode (group A, n=23), segmentation splicing mode (group B, n=18) and the combination mode (group C, n=37). The image quality, SNR and CNR of the anterior soft tissues of neck were statistically compared. Results:A higher image quality score was obtained in group C. The mean SNR and CNR in three groups were calculated as 214.70±148.78, 91.95±59.26, 307.61±127.80, and 208.74±148.27, 85.79±59.50, 301.58±127.48, respectively. The image quality score, SNR and CNR in group C were significantly better compared with those in group A and B (all P<0.01). Conclusion:Combination of bolus and segmentation splicing modes is a recommended approach in MRI simulation during radiotherapy of neck tumors.

Study on the clinical characteristics, examination of cytology and the anatopathology of metastasis cervical lymph nodes in head – neck neoplasms and unknown metastasis cervical lymph nodes

Study on 171 patients who had metastasis cervical lymph nodes (132 males, 39 females) caused by head – neck neoplasm or unknown causes were diagnosed and surgery treated at Hospital K, Ha Noi from Dec 1998 to Jun 2001. The results showed that: the clinical features can used to evaluate metastasis and to be basic for treatment strategy such as: site, size, density, number, mobility, characters of skin on node’s surface. It is emphasized that cytology biopsy is very effective method in diagnosing metastasis cervical lymph nodes.