scholarly journals Diagnostic Accuracy of Twinkling Artifact Sign Seen in Color Doppler Ultrasonography in Detecting Microlithiasis of Kidney

2020 ◽  
Vol 12 (2) ◽  
Author(s):  
Maryam Letafati ◽  
Mohammad Kazem Tarzamni ◽  
Parisa Hajalioghli ◽  
Siavash Mohammad Taheri ◽  
Hamed Vaseghi ◽  
...  
Author(s):  
Mohammadreza Akhlaghi ◽  
Masoomeh Zarei ◽  
Majid Ziaei ◽  
Mohsen Pourazizi

Purpose: This study evaluated the sensitivity, specificity, and diagnostic accuracy of Color Doppler Ultrasonography (CDUS) in patients with suspected retinal detachment (RD) who underwent surgery. Methods: In this prospective, observational clinical study, 65 eyes of 65 consecutive patients with suspected RD with opaque media were included. Following a standardized protocol, CDUS of the retina of the affected eye was performed. The sensitivity, specificity, and diagnostic accuracy of CDUS were determined and compared to the findings during surgery. Results: The mean age of patients (18 men and 47 women) was 52.36 years (range: 8–77 years). The sensitivity, specificity, and overall accuracy of ocular CDUS were 91.3%, 88.1%, and 89.2%, respectively. The false-negative rate (negative CDUS images but presence of RD at operation) was 3.1% (2/65) and the false-positive rate (positive CDUS images but absence of RD at operation) was 7.7% (5/65). Conclusion: CDUS of the retina could be considered as a promising tool in the diagnosis of RD in patients with opaque media.


Author(s):  
Ghazala Shahzad ◽  
Kelash Kumar ◽  
Mahesh Kumar ◽  
Aashfa Hassan ◽  
Nida Rafiq

Objective: To assess the diagnostic accuracy of Color Doppler ultrasonography in patients with Deep Venous Thrombosis by using venography as gold standard at Radiology department of Civil Hospital Karachi. Methodology: This cross-sectional study was carried out from August 2014 to March 2015 at Radiology Unit, Civil Hospital Karachi. Patients of either gender with deep venous thrombosis were included based on clinical examination and observation. For Doppler ultrasound, the combinations of spectral scanning, color compression, and grey scale were used. Potential anomalies including existing or non-existing thrombus along with its magnitude were evaluated. Color Doppler Sonographic results included incompressible, lack of phasicity, site of flow space and absence of increasing trend. Scan diagnosis was subsequently contrasted with venographic reports and recorded in self-made proforma. Data was analyzed by using SPSS version 20. Results: Total 104 patients were studied and their average age was 52.4±9.4 years. Males and females were 56% and 44% respectively. Color Doppler ultrasonography findings showed 99% sensitivity and 80% specificity. Positive predictive value 99% and negative predictive value 80% and accuracy was 98%. Conclusion: Color Doppler ultrasonography is cost-effective, efficient, safe, and non-invasive method to diagnose the deep venous thrombosis of acute nature.


2014 ◽  
Vol 32 (4) ◽  
pp. 1654-1660 ◽  
Author(s):  
NAOTO OEBISU ◽  
MANABU HOSHI ◽  
MAKOTO IEGUCHI ◽  
JUN TAKADA ◽  
TADASHI IWAI ◽  
...  

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