Cardiac Advanced Visualization: More than Just a Pretty Picture

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While the technology behind cardiac advanced visualization (AV) can create some amazing images, it provides much more than just a “wow” factor. Radiologists and cardiologists rely on it to help them increase productivity and workflow and reduce costs, diagnose more quickly and accurately, and better communicate results with referring physicians and their patients.

When it comes to boosting radiologist productivity, the most obvious benefit to AV software is its utility in reviewing the thousands of images produced by a cardiac CT scan. “In terms of being able to read studies quickly, the software has become essential,” says John Rumberger, MD, PhD, director of cardiac imaging at the Princeton Longevity Center in Princeton, N.J. “In the old days, a CT scan had 20 to 50 images. Now we have hundreds, and in the case of cardiac CT, thousands of images to review. They simply cannot be reviewed properly without the advanced presentation tools.”

With CT angiography, efficient utilization of AV technology also can help maximize clinical workflow, particularly when it comes to issues of patient throughput, says Kavitha M. Chinnaiyan, MD, department of cardiology, Beaumont Hospital in Royal Oak, Mich. Chinnaiyan and her colleagues from Beaumont presented a study at the American Heart Association 2009 Scientific Sessions in Orlando in November in which they found that the use of coronary CT angiography in the emergency room can successfully triage at-risk chest-pain patients and does so faster—and cheaper—than standard diagnostic testing.

The study included 750 patients who had experienced chest pain in the 12 hours prior to admittance to the emergency department and had normal ECG and cardiac enzymes. The patients were randomized to either receive a standard diagnostic workup or CT angiography. There was no significant stenosis detected in 190 of the 262 patients who underwent the CT angiography, leading to their immediate discharge.

“Patients who came in with acute chest pain in the past would have to stay in the hospital for 24 hours or greater and undergo a whole bunch of tests before it was considered to be safe to discharge them,” says Chinnaiyan. “But now with CT angiography and the way in which we are able to visualize the coronary arteries, if they are normal, they [the patients] can go home within two or three hours. It says time and cost.”

In Chinnaiyan’s study, CT patients were discharged in approximately three hours compared with seven hours for those who received standard care. This resulted in a 38 percent reduction of costs, from the $3,500 for patients receiving standard care, to $2,000 for the patients who underwent CT angiography.

Personal preference & AV

While most of the manufacturers that sell CT scanners also offer workstations unique to these products, Rumberger says that the software in those cases, “while good, is often cumbersome.” Thus, many facilities opt for advanced visualization software from independent vendors.

Beverly Jess, CT supervisor in the Metropolitan Heart & Vascular Institute at Mercy Hospital in Coon Rapids, Minn., says one of the driving forces behind the decision to install Vital Images’ Vitrea Enterprise Suite was dissatisfaction with the amount of time it was taking to do reads with the software that accompanied the facility’s CT scanner. “It was just taking a long time,” Jess says. “By using Vital Images, we were able to cut the reading time in half for the cardiologists.”

Jess just served as a beta tester for the Vitrea Enterprise Suite 5.1 upgrade and says she finds it to be “much more robust, particularly when it comes down to grabbing the smaller vessels—I don’t have to go in manually and do a whole lot.”

Rumberger has experience with all the major players in the third-party advanced visualization market and lauds their willingness “to adapt their software to the needs of their customers.” For example, he says, Ziosoft’s newer system allows the user to define certain controls that can differ from one user to the next, “which makes things a lot easier.”

Scott Flamm, MD, head of the section of cardiovascular imaging in the Cleveland Clinic Division of Radiology, says one size AV software doesn’t fit all personal and clinical needs, so he makes a range of AV software products available within his department.

“I’ve never been interested in trying to ram something down someone’s throat and saying, ‘this is what you use,’” Flamm says. “Allowing a variety of choices and having