Liver computed tomography scan with biliary reconstruction

This is an automatically translated article.

The article was professionally consulted by Specialist Doctor I Nguyen Thanh Hai - Radiologist - Department of Diagnostic Imaging and Nuclear Medicine - Vinmec Times City International General Hospital. Doctor Hai has more than 20 years of experience in the field of diagnostic imaging, especially in the field of multi-slice computed tomography, magnetic resonance.
Computed tomography (CT) of the liver is a modern and accurate imaging technique that allows to evaluate the structure of the liver. Liver CT scan results help detect abnormalities in the liver such as tumors, ...

1. Overview of liver computed tomography with biliary reconstruction

Computed tomography of the liver is a technique that uses X-rays and a machine system to capture and reconstruct the structure of the liver with layers.
Computed tomography of the liver with both intrahepatic and extrahepatic biliary reconstruction is an additional technique indicated after liver ultrasound in cases such as patients with biliary obstruction.

2. Indications for computed tomography of the liver with biliary reconstruction

Computed tomography of the liver with biliary reconstruction is indicated in the following cases:
Monitoring, looking for pathology in the liver and biliary tract in the case of limited ultrasound. The patient had clinical symptoms and ultrasound detected focal abnormalities in the liver. Additional results to diagnose liver and biliary tract diseases such as: inflammation, infection, gallstones, tumors, ... after ultrasound. The patient is assigned a 3-phase CT liver scan to determine the characteristics of the liver lesions with contrast enhancement in the arterial phase such as: benign liver tumor, vascular richness of endocrine cancer metastases to the liver. , hepatocellular tumor, ... Patients are assigned to have a CT scan of the liver normally in cases such as: cystic liver lesions, liver abscesses, portal hypertension, poor vascular tumors such as metastasis. colorectal cancer, ... Note, patients with kidney failure or allergy to contrast, pregnant women in the first weeks should be considered for indications for a CT scan of the liver with contrast injection...

3. Liver CT scan with biliary reconstruction

The procedure for liver CT scan with biliary reconstruction includes the following steps:
Step 1: Place the patient in a supine position on the scanning table, arms raised above the head, instruct and ask the patient to hold their breath while shot to avoid image noise. Step 2: Place an intravenous line. Select the imaging method for each specific case such as 3-phase scan, arterial or portal vein; Location of the scan to look for metastases such as localized imaging in the hepatobiliary or pelvis, etc. Step 3: Before contrast injection, liver CT scan with imaging field from mid-sternal to iliac crest to determine taste. The thickness of the cut layers before and after contrast injection was 5mm, reconstructed into 1.25mm and 2.5mm. Step 4: Inject contrast agent (dose is 2ml/kg body weight) by electric syringe with injection rate of 2-2.5 ml/s in case of 3-phase liver scan. After 25s injection, take the artery and 60s take the portal vein. With late enhancement lesions, take pictures at a later stage, 3-5 minutes after injection.

Step 5: Using 3D software, MIP, MPR... to reconstruct images of biliary tract and hepatic artery and portal vein system. The results of CT scan of the liver must clearly show the structure of the liver and biliary system, allowing to detect damage if any. Computed tomography of the liver with biliary reconstruction is a modern imaging technique performed at Vinmec International General Hospital by a team of highly qualified and experienced doctors and equipment. , state-of-the-art equipment, ensures a safe shooting process and gives accurate and fast results.

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