| 摘要 |
FIELD: medicine.SUBSTANCE: performed are: introduction of a radio-opaque preparation in the blood stream and multispiral computer-tomographic MSCT - arteriography with single-step return multispiral computer-tomographic MSCT-portography. Selective catheterisation of the celiac trunk (CT) and superior mesenteric superior mesenteric artery (SMA) is carried out simultaneously, the first portion of the contrast preparation is introduced into SMA in a volume of 25.0-35.0 ml at a rate of 1-2 ml/sec under a pressure of 200 PSI. After 13-17 s the second portion of the contrast preparation is introduced into CT and SMA in a volume of 12.0-18.0 ml at a rate of 3-5 ml/sec under a pressure of 200 PSI. Scanning is realised in one phase 2-4 sec after the introduction of the second portion of the contrast preparation, direction of scanning is cranio-caudal or caudo-cranial, parameters of scanning are the following: thickness of the cut - 1.5 mm, speed of the tube rotation - 0.5 sec, 100-140 kV (kilovolt), 250-350 mA (milliamper). Tumour invasion of vessels is verified by the condition of vascular wall contours on the obtained images.EFFECT: reliable determination of the vessel invasion by the tumour at a pre-operative stage, with good visualisation of both the external, and internal contours of the vascular wall simultaneously contrasted arterial and venous vessels, minimisation of the radiation exposure of the organism with the maximal self-descriptiveness, extension of the arsenal of diagnostics means in patients with tumours of the biliopancreatoduodenal zone.1 ex |
