Diagnostic value of color Doppler twinkle artifact in renal stones

Abstract

The high prevalence and importance of renal stones diagnosis have been suggested by several methods such as simple grafting, ultrasound and CT scan to detect these rocks. The standard golden method for the diagnosis of renal stones is CT scan without contrast, but due to the high cost and use of ionizing radiation, other methods are also used in diagnosis. Therefore, the purpose of this study was to evaluate the color Doppler twinkle artifact diagnosis in Diagnosis of kidney stones. Materials and Methods: In this study, 110 suspected kidney stones were referred to hospitals affiliated to Tabriz University of Medical Sciences. Patients underwent CT scan, and if the stone was smaller than 4 mm, they were sent for Color Doppler twinkle artifact ultrasound. Data were analyzed by SPSS software version 22. Results: Based on CT scan, 90% of kidney stones were diagnosed. In 82.7% of patients with renal stone based on CT scan, renal stone was diagnosed based on sonography. In 76.7% of patients with renal stone based on CT scan, kidney stones were detected based on Color Doppler twinkle artifact. There was a significant correlation between the diagnosis of renal stone based on the color Doppler twinkle artifact and the posterior shadow of the patients (P<0.05). Of course, there was no significant correlation between renal stone detection based on Color Doppler twinkle artifact with age, sex, renal involvement and place of stones in all of the patients (P>0.05). The diagnostic value of Color Doppler twinkle artifact was significant in renal stones diagnosis (P<0.05). So, sensitivity, specificity, positive and negative predictive value and accuracy of Color Doppler twinkle artifact were 76.8%, 100%, 100%, 32.4% and 79%, respectively. Also, the diagnostic value of Color Doppler twinkle artifact was significant in renal stones diagnosis based on age, sex, posterior shadow, renal involvement, and location of stones in the kidney (P<0.05).