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作者就核磁共振成像(MRI)对宫颈癌放疗疗效评价进行探讨,认为其鉴别肿瘤与正常组织优于CT,还可制定恰当的治疗计划。本文以接受放疗的54例宫颈癌为对象,其中治疗中行MRI多次迫踪检查者22例。使用仪器为常导型MRI装置,通过骨盆内子宫的矢状面、冠状面及宫颈的横断面摄影,并与CT比较。对放疗腔内照射线量分布加以研究,插入腔内照射涂药工具行MRI摄影,经模数腔内照射线量统计算系统核对获得线量分布图。结果:(1)宫颈癌的描绘:宫颈癌适用SE(自旋回波)和T_1像,SE像脏器空间分辨率好,病灶呈清晰的高信号,T_1像分辨率差,但病灶识别力强,可定量探时T_1值。MRI可随意行横断、矢状及冠状扫描掌握肿瘤进展状况。矢状片可显示肿瘤的不同病期,推测肿瘤浸润范围,全组能推测的肿瘤部位达82%(44/54)。(2)治疗计划的应用:
The author discusses the evaluation of radiotherapy for cervical cancer by MRI, and finds that it is better than CT in differentiating tumor from normal tissue and can also make appropriate treatment plan. In this paper, 54 cases of cervical cancer receiving radiotherapy as the object, including the treatment of multiple cross-track MRI in 22 cases. The instrument used was a normally-guided MRI device and was cross-sectioned through the sagittal, coronal and cervical sections of the pelvic uterus and compared with CT. Radiation dose distribution in the cavity to be studied, inserted into the cavity of the applicator tool line MRI photography, the number of cavity within the radiation dose calculation system to check the line volume distribution map. Results: (1) Cervical cancer: SE (spin echo) and T_1 images were applied to cervical cancer. The spatial resolution of SE was good, the lesions were clearly high, the resolution of T_1 was poor, but the lesions were strong , T_1 value can be quantitatively probed. MRI can be arbitrary line transection, sagittal and coronal scan to grasp the progress of the tumor. The sagittal can show the different stages of the tumor, speculated that the extent of tumor invasion, the whole group can infer that the tumor site reached 82% (44/54). (2) the application of treatment plan: