The Impact Of MR On The 1992 Fuzhou Staging Of Nasopharyngeal Carcinoma And Radiotherapy Target

Objective:This study compared 37 cases of patients with NPC of the CT and MRI to study the MRI's impact on 1992-Fuzhou staging about NPC and the impact of radiotherapy target. Method:Select from February 2006 to March 2008 admitted in our hospital, confirmed by pathology of 37 patients with newly diagnosed patients with NPC, shortly before treatment in all CT and MRI examination. CT scans use PHILIPS16-slice CT-based simulation machine, cross-sectional enhance conventional scanning. MRI use GE1.5 Tesla superconducting magnetic resonance machine, conventional FSE sequence,scanning direction for the cross-sectional, sagittal and coronal. CT and MRI scanning: with eyes on the sector level, the lower bound of clavicle area, all cases were enhanced scan. Comparing the two tests to determine NPC T stage, N staging and clinical stages, as well as the impact of radiotherapy target. Results:Two tests in the anterior soft tissue, slopes and retropharyngeal lymph nodes were on the statistical difference, the remaining 21 sites were the difference was not significant differences in specific phases of the impact is: the same of T stage is 56.8% (21/37), accounting for 43.2%(16/37), which increased in phases accounted for 24.3% (9/37), the phases of the 18.9% decline (7/37 ), The two tests in determining T stage on a significant difference,χ2=16.346, P=0.001;two lymph nodes in the neck on the show no significant differences, N stage no significant impact,χ2=0.333,P=0.564, but the retropharyngeal lymph nodes detected a significant difference,χ2=9.36, P=0.002; In determining clinical staging area led to a 35.1% (13/37) cases in phases in changes, which have increased in phases 24.3% (9/37), staging a 10.8% decline (4/37), two Kind of means test in determining the clinical stage, there were significant differences,χ2=10.359, P=0.006; in determining the target on radiotherapy, MRI target volume than the target volume CT an average increase of 33.55%, there was a significant difference,t=-10.656 P=0.000. Conclusions:37 cases of this group of patients with NPC information, MRI and CT compared to the violation of the disease shows more clearly and thus lead to staging and radiotherapy target change. The establishment of a new, to MRI as the main means of NPC clinical staging system of clinical need; MRI can show more accurate target, outlined in the target should be the introduction of radiotherapy MRI.