A comparative study of SPECT/CT fusion imaging and CT in infiltrated mandible by gingival carcinoma

Objective： The aim of the study was to evaluate the clinical value of ^99mTc-methylene diphosphonic acid （MDP） SPECT/CT fusion imaging and CT scanning in diagnosis of infiltrated mandible by gingival carcinoma. Methods： 18 cases of gingival carcinoma were processed infiltrated mandible by ^99mTc-MDP SPECT/CT fusion image and CT, and their scanning results compared with pathology findings. Results： Eleven of 13 cases with well-differentiated squamous cell carcinoma showed positive images, one of 11 cases was false positive images by pathology findings, and 10 cases were exhibited infiltrated mandibles; 5 cases with moderately differentiated and poorly differentiated squamous call carcinoma showed positive images, pathology showed carcinoma call had infiltrated cavum ossis of mandible. Five of 18 cases were positive images by CT. Conclusion： ^99mTc-MDP SPECT/CT fusion imaging is a useful method in diagnosis of infiltrated mandible by gingival carcinoma.

SPECT/CT图像融合在分化型甲状腺癌^(131)I治疗后的临床应用价值

目的探讨SPECT/CT图像融合在分化型甲状腺癌术后患者131I治疗后判断残余组织和转移灶的存在部位,并在确定治疗方案中的应用价值。方法对分化型甲状腺癌(DTC)术后患者30例(60例次)于131I治疗后5~7天行SPECT/CT全身和局部断层显像。131I治疗剂量为100~200mCi。结果DTC术后患者131I治疗行SPECT/CT融合图像显示:单纯残留甲状腺组织摄取131I37次,残余甲状腺和颈部淋巴结16次,纵膈和颈部淋巴结2次,双肺弥漫性及散在病灶1次,右锁骨上淋巴结1次,残余甲状腺和双肺转移2次,残余甲状腺组织和骨骼转移1次。结论SPECT/CT图像融合在131I治疗DTC后提高病灶的定位诊断、制定和调整治疗方案方面具有重要的应用价值。

^(131)I-SPECT/CT多模态显像联合超声及血清Tg对分化型甲状腺癌颈部淋巴结转移的诊断价值

[目的]探讨SPECT/CT多模态显像联合颈部超声及血清甲状腺球蛋白(Tg)对分化型甲状腺癌(DTC)^(131)I治疗后颈部淋巴结转移的诊断价值。[方法 ]68例DTC术后患者,^(131)I治疗前行血清Tg及颈部超声检查,^(131)I治疗后5d分别行WBS及SPECT/CT多模态显像,联合颈部超声及Tg,以病理及随访结果为诊断标准,采用χ~2检验对两种显像方法进行比较。[结果]68例DTC患者,颈部病灶共180个,SPECT/CT多模态显像检出率96.67%(174/180),WBS检出率90.56%(163/180,),差异有统计学意义(χ~2=5.26,P=0.018)。单独联合超声或Tg,以及同时联合超声和Tg时,^(131)I-SPECT/CT多模态显像对DTC术后颈部淋巴结转移灶的诊断价值与^(131)I-WBS比较差异均有统计学意义(χ~2=34.065,P<0.001;χ~2=38.246,P<0.001;χ~2=19.431,P<0.001)。灵敏度、特异性及准确性方面,^(131)I-SPECT/CT多模态显像联合超声分别为94.57%、94.31%、94.44%,^(131)I-WBS联合超声分别为78.26%、60.23%、69.44%;^(131)I-SPECT/CT多模态显像联合Tg分别为94.57%、92.05%、93.33%,^(131)I-WBS联合Tg分别为64.13%、67.05%、65.56%;^(131)I-SPECT/CT多模态显像联合超声及Tg分别为94.57%、97.73%、96.11%,^(131)I-WBS联合超声及Tg分别为66.30%、93.18%、79.44%。[结论]SPECT/CT多模态显像联合超声及血清Tg能提高DTC患者^(131)I治疗后颈部淋巴结转移病灶的检出率,明显提高颈部淋巴结转移诊断的灵敏度、特异性及准确性。