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Objective To investigate the correlation between CT manifestations of intramural vascular abnormalities and pathological subtypes,ground glass types in ground-glass opacity (GGO) lung adenocarcinoma.Methods CT data of 50 patients (55 lesions) with GGO lung adenocarcinoma confirmed by operative pathology were analyzed.The vascular morphology was observed.Correlation between vascular abnormalities (vascular thickening and hyperplasia) and pathological subtypes,ground glass types in GGO lung adenocarcinoma were analyzed.Results Among 55 GGO lung adenocarcinoma lesions,5 were pre-invasive lesions,no vascular thickening was observed,whereas vascular increasing was noticed in 1 lesion.Among 16 minimally invasive adenocarcinomas (MIA),vascular thickening and vascular increasing were observed in 11 and 16 lesions,respectively.All 34 invasive adenocarcinomas (IAC) were found with vascular thickening and increasing.The overall difference of vascular thickening and vascular increasing among pre-invasive lesions,MIA and IAC was statistically significant (x2 =27.67,20.08,both P＜0.05).There was positive correlation between pathological subtypes and vascular thickening and vascular increasing (r=0.61,0.66,P＜0.01).Significant differences of vascular thickening were found between pre-invasive lesions and MIA (x2=9.19,P=0.01),pre-invasive lesions and IAC (x2 =29.87,P＜0.01),as well as MIA and IAC (x2 =12.63,P＜0.01).There were significant differences of vascular increasing between pre-invasive lesions and MIA,pre-invasive lesions and IAC (x2 =15.45,20.79,both P＜0.01).Of all 55 GGO lung adenocarcinoma lesions,25 were pGGO,17 with vascular thickening and 21 vascular increasing;30 were mGGO,28 with vascular thickening and 30 vascular increasing.There were significant differences of vascular thickening and increasing in pGGO and mGGO (x2=6.12,6.69,both P＜0.05).Conclusion Vascular abnormalities in GGO lung adenocarcinoma suggest increasing of invasion.Vascular thickening and increasing can occur independently.
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Objective To investigate the diagnostic significance of thin layer reconstruction with spiral CT on the pulmonary hamartoma. Methods Accepted both routine CT examination and thin layer construction,2 1 pulmonary hamartoma cases confirmed by pathology were analyzed retrospectively.The margin and inner features of the lesions were observed and recorded.Significant analysis was performed by using SPSS17.0 Pearson chi-square test and Fisher exact test,with P<0.05 as the significant difference criterion.Results Comparison of the display rates by routine CT and thin layer reconstruction:①the same display rate of lobulation were 57.1%(12/21);②the same display rate of calcification were 42.9% (9/21);③the display rates of fat density were 14.3%(3/21)by routine CT and 42.9% (9/21)by thin layer reconstruction.The difference was statistically significant (χ2=4.200,P<0.05);④the display rates of blood vessel throughing were 14.3%(3/21)by routine CT and 47.6% (10/21)by thin layer reconstruction.The difference was statistically significant (χ2=5.459,P<0.05).Conclusion Displaying the inner features of pulmonary hamartoma better than routine CT,the thin layer reconstruction can improve the diagnostic accuracy significantly.
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Objective To investigate the value of multi slice spiral computed tomography (MSCT) reconstruction technique for diagnosis and preoperative evaluation of pancreatic carcinoma.Methods The multi-phase enhanced CT images of thirty-five cases of pancreatic carcinoma proved histologically were analyzed retrospectively.The techniques of volume rendering (VR),multi-planar reconstruction (MPR) and curved planar reformation (CPR) were used to deal with the images,and the relation between the pancreatic tumor and its surrounding structures,vessels,bile duct were observed,then the evaluation of possible surgical resection was performed,then it was compared with operative results.Results Among the 35 patients,27 vessels invasion was showed in 9 patients,common bile duct invasion in 19 patients,pancreatic duct invasion in 12 patients,duodenum invasion in 7 patients,posterior wall of stomach in 2 patients was invaded; one patient had regional portal hypertension with splenomegaly,peri-pancreatic lymph nodes enlargement was detected in 14 patients,para-aortic lymph nodes enlargement was detected in 4 patients,and liver metastasis was found in 3 patients.According to CT evaluation,surgery could be performed in 21 cases,finally 19 patients underwent curative pancreatic cancer resection,and 2 patients underwent palliative surgery.According to CT evaluation,surgery could not be performed in 14 cases,and all of the patients underwent palliative surgery.The coincidence percentage of pre-operative evaluation and post-operative results of curative surgery,palliative surgery was 90％ and 88％.Conclusions MSCT reconstruction technique is useful for diagnosis of pancreatic carcinoma regional invasion and metastasis,and it can increase the accuracy of assessment of tumor resectability.