To visualize the intracranial veins and sinuses, the examination includes the region from the calvarial vertex down to the first vertebral body. CT venography can be defined as a fast thin-section volumetric helical CT examination performed with a time-optimized bolus of contrast medium in order to enhance the cerebral venous system (, 5). This page is for Physicians, Inside and outside this institution, and CT Technologists. Notes: Contrast: - Contrast Type: Per site - Contrast Dose: 75-100 cc - Delay: 45 sec Dr. LP Riccelli works closely with OHSU CT techs in the art of creating optimal images from current technology. One bolus of 150 ml non-ionic contrast medium was injected at a rate of 3 ml s(-1) by a power injector via an arm vein. Most protocols for combined CT venography and pulmonary angiography have also adopted a 3-minute scan delay time after the start of the intravenous injection of contrast medium . 3 . Some radiologists use a longer delay for scanning of the pancreas at 50 sec p.i. It outlines CT protocols for diagnostic imaging currently applied to ou CT scanners. CT colongraphy: CT Enterography: BCT A12: Oral and IV cont- dome of diaphragm to pubic symphisis: Inflammatory bowel disease. 2 LOWER EXTREMITIES CT VENOGRAM LOWER EXTREMITY. V7: CT Venogram Bolus of IV contrast at 3 cc/sec, 150 mL (or 2 mL/kg BW) Empiric delay in scanning time depending on the area of interests: Thoracic: 60-90 seconds UE: 70-80 seconds Abd/Pelvis: 110 seconds LE : 180 seconds The venogram brain recon is a thin soft algorithm for reformats. Images required in PACS Scouts, 5mm x 5mm axial nc brain, 5mm x 5mm coronal nc brain, .6mm x .6mm axial brain venogram, 10mm x 5mm axial venogram mip, 10mm x 5mm sagittal venogram mip, 10mm x 5mm coronal venogram mip, Dose Report time, 2 rotations, 200° angular coverage, 133 frames/rota-tion, 70 kV, 0.36 mGy/frame), and the injection protocol used was a 2.5-ml/sec injection rate for a total volume of 18 ml, 0-second injection delay, and 7- to 10-second x-ray delay. 4 ... for pregnant patients only if time allows Oral Contrast Volume 450 cc Contrast Comments: ... with 70 sec delay CT of AbdPel Delayed Phase The use of pre-RFCA CT or magnetic resonance imaging (MRI) to show the 3-dimensional anatomy of the posterior LA has obviated the need to perform retrograde pulmonary venography during the ablation. ... For late arterial phase imaging 35 sec is the optimal time, so you start at about 25 seconds and end at about 45 seconds. The CT-images are of a patient who underwent two phases of arterial imaging at 18 and 35 seconds. ~5 cm below knees to iliac crest (if venogram DVT/legs ordered) ~5cm below pubic symphsis to diaphragm (if venogram A/P ordered) ACQUISITION The x-ray delay for 3D-RV acquisition was deter-mined from the 2D DSA images as explained below. Pancreatic Mass CT CT VENOGRAM PELVIS: Pelvic Venous Congestion. CT parameters were as follows: 5 mm beam collimation; 7-10 mm s(-1) table speed; and 2-3 mm reconstruction. The 3-dimensional LA models created in CT or MRI are referenced during the ablation, but real-time intraoperative imaging is still required. Two consecutive spiral scans with a 40 s exposure time were performed from the pelvis to the knee. A longer delay for scanning of the pancreas at 50 sec p.i arterial at. Ct techs in the art of creating optimal images ct venogram delay time current technology veins. 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