ABSTRACT
Objective To assess the efficacy of diffusion weighted imaging( DWI) with Magnetic Reso-nance Imaging to predict the T-staging in rectal cancer.Methods One hundred and seven cases confirmed by pathology of rectal adenocarcinoma patients were retrospectively analyzed.T-staging was determined by MRI and DWI combined with MRI.All the patients were underwent surgery within one week after MRI.We compared the results with the pathological T-staging after surgery,and compared the two methods of the preoperative T-stag-ing rectal cancer diagnosis accuracy.Results The accurate rates for T-staging of rectal cancer using MRI was 84.11%(90/107) .There was a correlation between the result of preoperative MRI and postoperative pathological T-staging(kappa=0.652,P<0.001);The accurate rates for T-staging of rectal cancer using combined MRI with DWI was 90.65%(97/107).There was a better correlation between the result of MRI with DWI and postop-erative pathological T-staging(kappa=0.732,P<0.001).Conclusion Compared with the conventional MRI sequences,the accuracy of MRI combined with DWI for diagnosis of T-staging in rectal carcinoma is higher.It can provide a more reasonable treatment.
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Objective To analyze the value of diffusion weighted imaging ( DWI) in assessing the effect of neoadjuvant chemotherapy of uterine cervix cancer .Methods Thirty one patients with LACC confirmed by pa-thology received conventional magnetic resonance imaging and DWI before and after neoadjuvant chemotherapy . The variation of DWI image and ADC was evaluated before and after chemotherapy .Results The correlation be-tween maximum diameter of the tumor before treatment (37.10 ±11.23) and pretreatment ADC value (0.83 ± 0.12)was not statistically significant(correlation coefficient r=-0.1746,P=0.3475);the correlation between the maximum diameter of the tumor(24.03 ±5.65)and ADC value(1.10 ±0.16)after treatment was not statisti-cally significant(correlation coefficient r=-0.2077,P=0 2621.);the degree of tumor size before and after the treatment was correlated with the degree of ADC increase (P0.05).Conclusion DWI sequence may be useful for early prediction and evaluation of curative effect to neoadjuvant chemotherapy for uterine cervical cancer .
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Objective To study the value of spiral CT in diagnosing renal cell carcinoma(RCC) and to evaluate the correlation of CT findings with histopathologie features in RCC. Methods 279 cases with RCC proven by surgery and pathology underwent plain and contrast-enhanced CT examinations. The clinic characteristics and CT findings were analyzed statistically and compared with surgical results. Results 90.32% lesions showed medium or obvious enhancement on contrast-enhanced CT,with the exception of granule cells for enhanced uniform, the other cell type of RCC showed heterogeneous enhancement. 32.26% of tumors was of more or less short-burres (χ~2 = 38.2,P<0.01) ,and the there was significant relationship between pathological signs of short burr and the renal capsule involved by tumors. CT qualitative diagnostic rate was 91.40%. CT staging and pathologic staging were of the correla-tive coefficient of 0. 84, while there was not obviously correlation between CT classification of RCC and cancer cell types(P>0.05). Conclusion Spiral CT can better show characteristics of RCC, that can improve the diagnostic accuracy and staging aility for RCC.
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Objective The purpose of this paper was to evaluate the clinical value of double-contrast barium(DCB) combined with CT in the diagnosis of gastric carcinoma.Methods 112 patients with gastric carcinoma confirmed by surgery and pathology between 1990 and 1997 were included.69 patients took DCB of the upper gastric intestinal tract.43 patients were given CT scans,in whom 32 patients took DCB before CT.Results The accuracy of gastric carcinoma staging determined by DCB were 91.3%.The accordant rate of gross type of gastric carcinoma determined by DCB and the combined way were respectively 67.74% and 72.41%,superior to CT(47.22%,?