CT liver with contrast and without
It should be noted that pathological changes in the liver can appear at any age. In order to identify the disease and provide adequate treatment requires early diagnosis. Important to this is the CT scan of the liver.
In the study of the liver CT scan are shown in the following cases:
- severe liver disease and kidney failure (you cannot enter the contrast as it may exacerbate the patient’s condition).
How to prepare for CT scan of liver with contrast
It is recommended that the CT on an empty stomach! In the extreme case can not eat before the test to four hours. No more preparation is required.
Assistant office CT examinee explains the essence of the procedure. Warns of the need to lie during a survey on a tripod motionless, the patient will need to hold your breath at the command of the medical staff (during the scanning). When using contrast media patients should be warned about possible adverse reactions.
Restless behavior of the patient during computed tomography may result in motion artifacts, which significantly reduces the quality of the resulting images.
It should be noted that the remnants of the barium after conducting x-ray contrast studies of the gastrointestinal tract can degrade the quality of computer tomograms.
What is the benefit of contrast studies
The main thing is that in CT not very well visualized internal organs, including the liver. Therefore, it is necessary to conduct CT with contrast. For this examinee intravenous iodine-containing contrast medium (for example, Ultravist, omnipak, urografin).
Tomography with contrast shows the exact sizes of lesions, the borders of distribution of malignant tumors outside of the liver. Along with this artificial enhancement to differentiate benign processes in the liver and malignant. The fact that benign tumors, usually either do not accumulate the contrast agent, or accumulate it very poorly. For malignant tumors in most cases characterized by a very pronounced accumulation of contrast.
I should say that the small size metastases can be visualized on contrast images.
What can be seen on CT in normal and pathological conditions
During CT of the liver visualized by the shape, size and structure of the body. Measured outer contours of the liver, the equity structure, as its fatty capsule. In addition, the tomograms can be seen intrahepatic vessels and bile ducts.
It should be noted that the formation of benign (simple cysts, adenomas, hemangiomas) have a smooth and clear contours, sometimes slightly wavy. Slightly different look of malignant tumors: they have rough, fuzzy, often – bumpy contours. A significant role is played by the size of the pathological focus. Benign disease predominantly characterized by small size and slow growth, malignant – often large size of the formation and fast growth rate.
So, a CT scan of the liver is crucial in the diagnosis of neoplastic and inflammatory processes. Allows us to estimate the density and size of the body, its structure and the presence of intrahepatic pathological formations. The informative value of CT, particularly in the diagnosis of liver tumors, increases with the use of contrast.