News | October 09, 2007

Thoracic Imaging Pinpoints Underlying Venous Problems

October 10, 2007 - A new technique for capturing images of chest veins eases diagnosis of venous diseases, according to a study presented by University of Cincinnati (UC) radiologists at the North American Society of Cardiovascular Imaging's 35th Annual Meeting and Scientific Sessions in Washington, D.C.
Developed by Cristopher Meyer, M.D., and Achala Vagal, M.D., the new protocol allows radiologists to compensate for the extra time it takes contrast solution to reach the veins so useful images can be produced using the CT scanner.
“We found that the rapid-imaging scanners were almost too fast for venous studies,” explained Vagal, a UC assistant professor and radiologist at University Hospital. “By the time the contrast reached the patient’s veins, there were too many artifacts to make any meaningful conclusions about possible disease - for example, blood clots.”
Venous disease is rare and can be difficult to pinpoint, noted Vagal. “This new protocol uses the same imaging equipment in a novel way that allows us to acquire better venous images and make good clinical decisions,” said Vagal, who presented guidelines for this thoracic imaging protocol at the meeting.
For this new imaging technique, the CT technologist prepares two syringes of contrast: The first includes 140 cubic centimeters (CC) of undiluted contrast; the second contains a diluted mixture of 100 CC of contrast and 10 CC of saline solution.
"The key to getting accurate clinical images of the veins is in the timing," Vagal indicated.
Both syringes are given consecutively at a rate of four CC per second, with a 60-second delay between the final injection and initiation of the CT scan.
"Previously, there was so much dense contrast in the veins that all you could see on the CT scan were streaks that didn't tell you anything about possible venous disease," explained Vagal. "Delaying the scan gave us enough time for both the arteries and the veins to be opacified, which resulted in the crisp images that allowed us to make better clinical determinations."

For more information: www.med.uc.edu

Related Content

Video Plus Brochure Helps Patients Make Lung Cancer Scan Decision

Image courtesy of the American Thoracic Society

News | Lung Cancer | April 19, 2019
A short video describing the potential benefits and risks of low-dose computed tomography (CT) screening for lung...
FDA Clears GE's Deep Learning Image Reconstruction Engine
Technology | Computed Tomography (CT) | April 19, 2019
GE Healthcare has received 510(k) clearance from the U.S. Food and Drug Administration (FDA) of its Deep Learning Image...
Videos | RSNA | April 03, 2019
ITN Editor Dave Fornell takes a tour of some of the most interesting new medical imaging technologies displa
Johns Hopkins Medicine First in U.S. to Install Canon Medical's Aquilion Precision
News | Computed Tomography (CT) | March 26, 2019
March 26, 2019 — Johns Hopkins Medicine now has access to the first...
At #ACC.19, Siemens unveiled a version of its go.Top platform optimized for cardiovascular imaging. The newly packaged scanner can generate the data needed to do CT-based FFR (fractional flow reserve).

At #ACC.19, Siemens unveiled a version of its go.Top platform optimized for cardiovascular imaging. The newly packaged scanner can generate the data needed to do CT-based FFR (fractional flow reserve). Photo by Greg Freiherr

Feature | Cardiac Imaging | March 22, 2019 | By Greg Freiherr
Reflecting a trend toward the increased use of...
Researchers Use Radiomics to Predict Who Will Benefit from Chemotherapy
News | Radiomics | March 21, 2019
Using data from computed tomography (CT) images, researchers may be able to predict which lung cancer patients will...
HeartFlow Analysis Successfully Stratifies Heart Disease Patients at One Year
News | CT Angiography (CTA) | March 19, 2019
Late-breaking results confirm the HeartFlow FFRct (fractional flow reserve computed tomography) Analysis enables...
Podcast | Cardiac Imaging | March 15, 2019
Debate About Coronary Testing Highlights ACC Session
Canon Medical Introduces Entry-Level Aquilion Start CT
News | Computed Tomography (CT) | March 14, 2019
Canon Medical Systems Europe B.V. introduced the all-new Aquilion Start computed tomography (CT) system to the European...
Siemens Healthineers Debuts Cardiovascular Edition of Somatom go.Top CT
News | Computed Tomography (CT) | March 14, 2019
Siemens Healthineers will introduce the Somatom go.Top Cardiovascular Edition, a new version of its established...