CT

Before considering revascularization procedures, surgeons want proof of ischemia. While catheter angiography has value in assessing lesions associated with coronary artery disease, it cannot assess the associated ischemia. PET imaging is increasingly being used to provide that information. With the rise of multislice CT angiography as a first-line test for patients with suspected CAD, researchers have set their sights on integrated PET/CT for combined acquisition of coronary anatomy and perfusion.

PET/CT has a promising role in the diagnosis of diabetic foot infections, according to cumulative data by Dr. Zohar Keidar, deputy director of nuclear medicine at Rambam Medical Center in Haifa, Israel.

The Department of Energy and the National Institutes of Health are collaborating on a three-quarter of a million dollar study to determine the importance of nuclear medicine research and to recommend ways to overcome problems that have dogged its pursuit.

Contrast agents that can aid MRA examinations have been on the market for more than 15 years. Historically, radiologists could choose from a wide range of agents that, once injected intravenously, would flow through the extracellular space. They would then be excreted from the body relatively rapidly. These extracellular contrast agents are now being joined by a new class of blood pool, or intravascular, contrast agents that bind with molecules in the blood and stay in the circulation for longer.

MR physics dictates that the faster the blood flow, the better the likelihood of quality vessel imaging. Attaining this goal in clinical practice is clearly difficult, given the need for patients to lie still on an MR table for up to 45 minutes. The problem of sluggish blood flow is further compounded in patients with circulatory problems. Yet these are the very individuals who may require MR angiography the most.

After twice considering and rejecting endorsement of CT colonography as a cancer screening tool, the American Cancer Society is taking another look. Prompted by advances in reporting standards, technique, and training, the ACS may include the virtual colonoscopy technique as an optional test in its colon cancer screening guidelines by year's end. Such a move, coupled by favorable results from a national clinical trial, could push CTC into the practice mainstream, bolstering adoption, furthering development of computer-aided detection, and most important, fostering reimbursement.

Since the introduction of cardiac catheterization in the 1940s, development and implementation of cardiovascular imaging techniques have been a collaborative effort among several specialties, particularly radiology and cardiology. Many pioneers in CV imaging have held joint appointments.

Who will speak for cardiac CT? No one, when the setting is the annual business meeting of the Society for Cardiovascular Magnetic Resonance.

If the corporate world were a circus, Analogic would be the high wire act. The Peabody, MA, company has struck a fine balance between being an electronics supplier and being a manufacturer of end user equipment.

Imaging equipment manufacturers are getting their first taste of an advanced processor that could boost the speed of image reconstruction by several orders of magnitude while delivering better image quality.

The release of Siemens' Somatom Definition may forever change CT. The scanner, unveiled just days before the RSNA meeting and featured at the Siemens booth on the exhibit floor, combines two 64-slice scanners in one, incorporating two x-ray tubes and two detectors. Together, they generate 128 slices every 330 msec. The new product is distinguished less by number of slices or even the novelty of two imaging chains, however, that by what the technology can do: double temporal resolution and cut acquisition time in half.

A few years back I made a bet that molecular imaging would become nothing more than a synonym for nuclear medicine. At the time it made sense, what with companies parking their gamma cameras and PET/CTs under this title. But since then, you might say I’ve seen the light.

R2 Technology is leveraging knowledge gained in developing computer-aided detection to make products easier and more efficient to use.

Israeli start-up Spectrum Dynamics has developed technology that can generate 10 times the sensitivity and double the spatial resolution of conventional Anger cameras, according to the company. Such dramatic increases raise the possibility of real-time imaging that shows the perfusion of one or more radiotracers through the myocardium introducing a radical change in the way cardiac patients are evaluated.

Siemens embraced customers 10 years ago as integral to its operations. When developing new technologies, engineers turn to customers early on to make sure their ideas have clinical value. This has led to some risk-taking, as evidenced by the introduction at the RSNA meeting of the Somatom Definition, a unique CT scanner that boosts speed and data collection by using dual detectors and tubes.

A few years back I made a bet that molecular imaging would become nothing more than a synonym for nuclear medicine. At the time it made sense, what with companies parking their gamma cameras and PET/CTs under this title. But since then, you might say I’ve seen the light.

There is nothing incidental about the frequency of incidental findings seen in wide field-of-view 64-slice cardiac imaging. A study by Dr. Joshua Macatol, a radiology researcher at William Beaumont Medical Center in Royal Oak, MI, found that dozens of noncoronary findings may go undetected, however, as cardiologists focus on possible coronary artery disease.

Imagine a gamma camera that generates video showing the perfusion of a radiotracer through the myocardium, the image brightening and dimming with the wash-in and wash-out of the tracer. Now imagine using a cocktail of radiotracers with each ingredient appearing on screen in a different color, together displaying a range of physiologic data.

There is nothing incidental about the frequency of incidental findings seen in wide field-of-view 64-slice cardiac imaging. A study by Dr. Joshua Macatol, a radiology researcher at William Beaumont Medical Center in Royal Oak, MI, found that dozens of noncoronary findings may go undetected, however, as cardiologists focus on possible coronary artery disease.

Veterinary imaging specialists are broadening their horizons, making greater use of MRI, CT, and nuclear scintigraphy to supplement information from radiography and ultrasound examinations. The number and complexity of diagnostic tests on dogs, cats, and horses are growing steadily, and even live sharks and elephants have been imaged.

Multislice CT may someday save thousands of patients the worry and bother of a hospital stay to determine whether their chest pain is caused by acute cardiac syndrome.

Although the debate regarding MR colonography screening lives on, European radiologists agree dark lumen MRC is ready for prime time, according to studies presented Tuesday.

New research conducted at the University of Erasmus in Rotterdam may erase any lingering doubts about the superiority of 64-slice CT in detecting coronary artery disease.

Continuing medical education is a must for radiologists planning to perform CT colonography, according to two studies presented by U.K. researchers at the RSNA meeting on Sunday.

Siemens is radically changing the direction of its CT program with the introduction of its Somatom Definition. The new scanner, publicly announced Nov. 17 and featured Sunday at the RSNA meeting, packs two imaging chains in a single unit, generating 128 slices per rotation. But Siemens is downplaying the number of slices in favor of the speed of the scanner and how its use might change the clinical application of CT.

Siemens’ unveiling of the Somatom Definition Nov. 17 in New York City promises to radically change CT scanning.

A decision by GE Healthcare to introduce a new line of compact CT scanners, the BrightSpeed, reflects a major trend in the market toward miniaturization. The new scanners will be unveiled at the RSNA meeting.

There was a time when all that really mattered in medical imaging was technology that dealt with, well, medicine. That’s changed. Though clinical molecular imaging using advanced biomarkers is still a ways away, we’ve opened the door a crack to use miniature PET scanners in animal research with these agents. Now one of life’s inevitabilities is wedging the door open a bit more.

Siemens hopes to redefine CT with the introduction of a scanner that combines two 64-slice imaging chains in a single unit.