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| Comparison of ratio method and score method in the diagnosis of prostate cancer with transrectal real-time tissue elastography |
| HAN Lai-fu, LIN Ping, WANG Wei, SUN Wei-bing, ZOU Rui |
| Second Affiliated Hospital of Dalian Medical University, Dalian Liaoning 116027, China |
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Abstract Objective: To compare score method and ratio method in the diagnosis of prostate cancer(PCa) with transrectal real-time tissue elastography(TRTE). Methods: Sixty-seven patients suspected of PCa were examined with two-dimensional and elastosonography. Elastography score and strain index(SI) of the nodules were calculated. The curves of receiver operating characteristic(ROC) were built to find the diagnostic point. The value of TRTE score method and the ratio method in the diagnosis of PCa were analyzed compared with pathological results. Results: TRTE ratio method showed a significant difference of SI between benign and malignant nodules(P<0.05). Compared with digital rectal examination(DRE) and transrectal ultrasonography(TRUS), TRTE ratio method had statistical significance in diagnostic sensitivity, specificity, and accuracy and the two methods above(P<0.05), but there was no significant difference between score method and TRUS(P>0.05). The difference of diagnostic sensitivity, specificity, accuracy was statistically significant between score method and ratio method(P<0.05). Conclusion: TRTE can increase the diagnostic rate of PCa, and the ratio method provides a more objective and valuable information for the diagnosis of PCa.
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Received: 14 August 2012
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Corresponding Authors:
LIN Ping
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2013, Vol. 24 
