Related Experiment Video
Updated: Aug 14, 2026

A Two-Step Method for Percutaneous Transhepatic Choledochoscopic Lithotomy
Published on: September 13, 2022
[Unenhanced helical computed tomography in the diagnosis of choledocholithiasis]
Irade Duşdurova1, Murat Danaci, Ahmet Bektaş
1Ondokuz Mayis Universitesi Tip Fakültesi, Radyoloji Anabilim Dali, Samsun.
Purpose:
The aim of this study is to investigate the diagnostic value of unenhanced helical computed tomography in choledocholithiasis.
Materials And Methods:
Unenhanced helical computed tomography was performed in 37 patients with findings of obstructive jaundice and suspicion of choledocholithiasis. Results were classified as choledocholithiasis and others. In 35 patients the results were confirmed by endoscopic retrograde cholangiopancreatography, and in 2 by surgery.
Results:
Choledocholithiasis was detected by unenhanced helical computed tomography in 16 patients. In 13 patients, choledocholithiasis was proven by endoscopic retrograde cholangiopancreatography and in one patient by surgery. Unenhanced helical CT had 93.3% sensitivity and 90.9% specificity in the diagnosis of choledocholithiasis.
Conclusion:
Unenhanced helical computed tomography may be used as a noninvasive, reliable, and rapid alternative diagnostic method in the diagnosis of choledocholithiasis.
Related Concept Videos
Computed Tomography
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
Endoscopic Procedures V: ERCP
Patient...
Imaging Studies for Cardiovascular System V: CT
Imaging Studies for Cardiovascular System VI: Calcium -Scoring CT
Imaging Studies III: Computed Tomography
Imaging Studies V: Intravenous Urography and Retrograde Pyelography

