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Objective To estimate the value of computed tomography perfusion for clinical stage and approach the correlation of perfusion parameters and Cyfra21-1.Methods 63 patients with head and neck squamous carcinoma were confirmed by pathology and follow up underwent CT perfusion,which were divided into three groups by international clinical staging criteria(stageⅠ,stageⅡand stageⅢ-Ⅳ).BF,BV,MTT,TTP and Cyfra21-1 were recorded and compared with correlation in different clinical staging.Results There was no significant difference of Cyfra21-1 between stageⅠand stageⅡ(Z =1.439,P =0.1 62).There was significant differ-ence of Cyfra21-1 between stageⅠand stageⅢ-Ⅳ(Z =3.356,P =0.000),stageⅡand stageⅢ-Ⅳ(Z =4.959,P =0.000).There was significant difference of BF and BV between stageⅠand stageⅡ,stageⅠand stageⅢ-Ⅳ(P 0.05),of MTT and TTP between stageⅠand stageⅡ(P >0.05).Cyfra21-1 and perfusion parameters in all groups have relationship(r=0.76,0.76,-0.82,-0.82,P <0.05).Conclusion The statistically significant of positive correlation be-tween Cyfra21-1 and perfusion parameters in head and neck squamous carcinoma suggests that CT perfusion could play a complemen-tary role in clinical assessment.
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Objective To approach the application value of diffusion weighted imaging with background suppression (DWIBS) combined with routine MR sequence in differentiating benign and malignant lymph nodes,and assessing therapeutic effect of lympho-genic tumors.Methods 48 patients with cervical lymph node enlargement who were confirmed by pathology and follow up under-went DWIBS and routine MRI examination,malignant lymph nodes were 83,benign lymph nodes were 79.16 patients with malig-nant lymph nodes were rechecked after radiotherapy and chemotherapy,Apparent diffusion coefficient (ADC)values of the solid part for lymph nodes were compared.Results More lymph nodes can be detected in DWIBS than conventional sequence.ADC values of the solid part for malignant lymph node(0.898±0.111)×10-3 mm2/s were lower than that of benign lymph node(1.043±0.106)× 10-3 mm2/s,there was significant difference between them (P<0.05).ADC values of all malignant lymph nodes after treatment (1.205±0.121)×10-3 mm2/s were significantly higher than that of pretherapy (0.883±0.090)×10-3 mm2/s (P<0.05).Conclu-sion DWIBS could more sensitively detect lymph node than conventional MR sequence.ADC value could provide some reference values for differentiating benign and malignant lymph nodes and assessing therapeutic effect.
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Objective To investigate the application value of diffusion-weighted imaging with background suppression (DWIBS) in lymph node metastasis of rectal cancer.Methods 30 patients with rectal cancer diagnosed by colonoscopy underwent routine MRI and DWIBS examinations.Metastatic and non-metastatic lymph nodes were confirmed by postoperative pathology.Apparent diffu-sion coefficient (ADC)values of the solid part of metastatic and non-metastatic lymph nodes were measured and compared.ROC curve analysis was used to define the threshold between the metastatic and non-metastatic lymph nodes.Results In all 73 lymph nodes,there were 52 metastatic lymph nodes and the other 21 were non-metastatic.ADC values of the solid part of metastatic and non-metastatic lymph nodes were (0.881 ± 0.094)× 10 -3 mm2/s and (1.072 ± 0.108)×10 -3 mm2/s respectively,the difference was statistically significant (P <0.05).With the threshold ADC value of 0.957×10 -3 mm2/s,the sensitivity and specificity for dif-ferentiating metastatic from non-metastatic lymph nodes were 90.5% and 80.8% respectively.The diagnostic value was excellent (Az value = 0.91 9,P <0.05).Conclusion ADC values may be used to differentiate lymph node metastasis of rectal cancer,and DWIBS has higher application value in assessing lymph node metastasis of rectal cancer.
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Objective To approach the value of combination mode of different CT post-processing technique in diagnosing rib fine fracture.Methods 98 patients suspected with rib fractures underwent multislice spiral CT(MSCT) scanning,and CT features of rib fractures were observed with the combination of three different images:(A)volume rendering(VR),curved planar reformation(CPR) and axial view;(B)maximum intensity projection(MIP),CPR and sxial view;and(C) VR+MIP,CPR and axial view.The results were respectively recorded.Results 265 rib fine fractures were found among 98 patients.The detecting rate of fine fractures with C group was higher than that with A group (χ~2＝6.67,P＜0.01) and B group (χ~2＝6.75,P＜0.01).Conclusion MSCT four step observation method can improve the detecting rate of rib fine fracture,that is of important clinical value.