What Is a Contrast Scan?

Enhanced scanning, one of the CT scanning techniques, scans using intravascular contrast agents. Intravenous injection of iodine-containing organic compounds, i.e. contrast agents, is generally performed by rapid intravenous injection of 60% diatrizoate 1.5-2.0ml / kg to maintain a certain level of iodine in the blood, and the images of organs and lesions are enhanced and displayed more clearly. ^[1]

Enhanced scan

Enhanced scan is the injection of medicine from a vein (usually the anterior elbow vein) into a blood vessel and a CT scan at the same time. It can be found that the lesion is not found by plain scan (no intravascular injection scan). It is mainly used to identify the lesion as vascular or non-vascular. Vascularity, clarify the relationship between mediastinal lesions and large cardiac vessels, and understand the blood supply of the lesions to help identify benign and malignant lesions. Increase the amount of information on the lesion to facilitate qualitative analysis of the lesion and even clear diagnosis.

Fasting scan in the morning on the day of the enhancement scan, negative skin test, no obvious hypertension, no contraindications such as heart, liver and kidney insufficiency. Different drugs are used at different prices, followed by different regions and different machines.

CT examination is one of the many medical imaging diagnostic techniques. A characteristic of its diagnosis is the measurement of the attenuation value of X-rays after passing through the human body. The professional term that reflects the attenuation value of X-rays is density. CT diagnostics uses "CT value" To describe the difference in density. The same tissue structure should be the same density, which means that the density of normal tissues and organs such as the liver is relatively uniform. However, some lesions, such as tumors, grow in normal tissues and organs, and because of the small number and small size in the early stage, when using ordinary CT scans, tumor tissues and surrounding normal tissues can show the same or similar density, so CT doctors It is often reported normally because the lesion cannot be found. However, if an enhanced scan is performed at this time (referring to the scan after intravenous injection of contrast agent), abnormal enhancement can be found at the lesion site to distinguish it from normal tissue, so that the lesion can be detected early and scientific and reasonable early. Treatment can both cure the disease and reduce the cost of treatment. Therefore, enhanced scanning is by no means a "duplicate", and you should actively cooperate with your doctor's inspection to avoid leaving irreparable regrets.