Computed tomography (CT) perfusion of tumor hemodynamics

This is an automatically translated article.

This article is professionally consulted by Master, Doctor Vu Huy Hoang - Radiologist - Department of Diagnostic Imaging and Nuclear Medicine - Vinmec Times City International Hospital.
Tumor hemodynamic computed tomography is a modern technique that provides markers of angiogenesis and the state of blood vessels in the tumor.

1. In what cases is computed tomography tumor hemodynamic analysis (CT perfusion) indicated?

Computed tomography, also known as CT, is a technique that uses X-rays with cross-sections to examine parts of the body. The imaging system is linked with the computer, the algorithms and the computer processor help create 2D and 3D images for diagnosis.
With the new generation of computed tomography machines, it can be easily integrated into the CT perfusion technique. This is a technique that helps to provide markers of angiogenesis in the tumor and reflect the status of blood vessels in the tumor. Tumor hemodynamic computed tomography scan helps doctors get more information about imaging in cancer pathology, not only useful in diagnosis, but also helps assess risk and monitor the following tumors. treatment.

Computed tomography of the organs for hemodynamic investigation of the tumor is indicated in the following cases: pathology of thoracic visceral tumor, abdominal tumor, and subframe tumor. Because this is a technique with contrast injection, the technique is not performed in cases of renal failure, allergy to contrast, pregnant women,...

2. What do you need to prepare for a computed tomography scan for tumor hemodynamics?

Technical team includes specialist doctors, radiology technicians, nurses
Necessary facilities include:
Computerized tomography machine Specialized electric pump Film, cassette (remove), image storage system In addition, to inject contrast, it is necessary to prepare medical supplies and drugs such as: syringe, needle, cotton, surgical gauze, contrast agent, skin antiseptic solution, water distillation, physiological saline, medicine box and emergency equipment for contrast dye accidents,...
Before taking the picture, the patient will be thoroughly explained by the medical staff about the procedure, steps taken to coordinate with the physician. Remove jewelry such as necklaces, earrings and other metal objects on the body, if any. Instruct the patient to fast for at least an hour before the procedure. Small amounts of water can be drunk, no more than 40ml. If the patient is too excited to lie still, the doctor may prescribe a sedative to help the patient relax.

3. Steps to conduct computed tomography of tumor hemodynamic studies

3.1. Prepare the patient

The doctor reviews the medical records, looks for signs of contraindications to intravenous iodinated contrast, and consults previous imaging results (if any). The nurse prepares the patient's intravenous line with an 18G needle.

3.2. Steps to conduct tumor hemodynamic tomography (CT perfusion) technique

Instruct the patient to lie supine on the table, hands above the head. Take pre-injection slices of the entire abdomen (thorax, pelvis,...) depending on the tumor location. At the end of the shooting time, exhale. The doctor considers a preliminary assessment of the tumor in terms of location, density, size,... Then selects localized slices of about 2cm on the site with the largest diameter of the tumor. Make post-injection slices localized to the selected area, patient holds breath at the end of expiration, at a rate of 1 second for one cut, slice thickness 5-10mm, lasts about 25-30s in one session. breath hold. Contrast injection speed 6ml/s, drug dosage from 40-70ml depending on the examination department. After capturing, the image data will be transferred to a computer with measurement software, perfusion mapping, and enhancement chart. The doctor measures the most strongly enhanced tumor sites to compare with the enhancement chart of the aorta and the intact visceral parenchyma.

Computerized tomography imaging of the tumor hemodynamics, if performed correctly, will give clear images of the anatomical structures in the examination area, helping the doctor to detect lesions, if any. If the patient does not remain motionless during the imaging process or does not clearly show the image, ... the results obtained do not serve well for the diagnosis, the doctor will appoint again. During the process of computed tomography of the organs for tumor hemodynamic investigation, the team will closely monitor the patient to detect early signs of allergy to contrast agents and promptly handle them.
In order to meet the needs of medical examination and treatment, currently Vinmec International General Hospital has been and continues to bring in a system of modern machines such as magnetic resonance imaging (MRI), computed tomography (CT), X-ray, etc. ... in the work of medical examination and treatment, diagnostic imaging, disease treatment. Especially in order to bring high efficiency in medical examination and treatment, Vinmec now also designs many accompanying medical services, bringing many conveniences to customers.
Doctor Vu Huy Hoang has 10 years of experience working in the field of diagnostic imaging, formerly a Doctor at the Department of Diagnostic Imaging - Thai Nguyen Central Hospital. Currently, the doctor is working at the Department of Diagnostic Imaging - Vinmec Times City International Hospital.
You can directly go to Vinmec Health System nationwide to visit or contact the regional hospital hotline here for support.

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