Diagnostic Validity of Ultrasonography in Evaluation of Biliary Obstruction and its Comparison with Magnetic Resonance Cholangiopancreatography . B J Rad. Img. [Internet]. 2026 Jun. 10 [cited 2026 Jun. 29];33(2):91-8. Available from: https://banglajol.info/index.php/BJRI/article/view/90691