Feature | March 10, 2010| Dave Fornell

Dose Lowering, Navigation Aids Among Top Trends in Angiography

GEs Innova 4100 angiography system offers technology to help lower patient radiation exposure.

Lowering radiation dose and improving navigation abilities of angiography systems have been among the top priorities of manufactures over the past year. Another big trend is integration of angiography systems in hybrid cath lab/operating rooms (ORs) as collaboration between surgeons and interventionalists improves with increasingly less-invasive procedures.

Many of the newest innovations in angiography technology were highlighted at the Radiological Society of North America (RSNA) 2009 annual meeting in December.

CT-Like Imaging

An important step forward has been the creation of computed tomography (CT)-like images in the cath lab using rotational angiography. Originally introduced by GE in 1997, most angiography manufacturers created their own systems, where the C-arm makes a rotation around the patient to create a 3D image dataset. The image can be used as overlays for better navigation, anatomical reference, and to help view device positioning. The images also overcome a shortcoming of angiography, which does not show the true lumen wall in vessels with stenosis.

Siemens Artis zeego delivers large-volume syngo DynaCT, offering CT-like slice images of the heart in motion and and an ECG-triggering option. Philips’ 3D Coronary Angiography (3D-CA) imaging creates a 3D model of the coronary vessel tree. The cardiac imaging volume can also be used to select the optimal viewing angle throughout the examination. The system will move the C-arm into the selected viewing angle automatically so additional dose is not used to reposition the arm.

Advanced Visualization Aids Navigation

At RSNA 2009, GE introduced new visualization tools for its Innova 4100IQ. With the Advantage Workstation VolumeShare 4, it uses software to provide precise anatomical detail. It includes subtracted 3D, which quickly visualizes vessels without having to remove surrounding bone, tissue and implanted devices. It also allows side-by-side nonsubtracted 3D, subtracted 3D or 3D mask images to compare, merge and analyze complementary images.

GE’s Blended Roadmap helps navigate complex anatomy by superimposing any DSA or InnovaBreeze bolus image with fluoroscopy using the table-side controls. Registration tools correct for patient movement and help improve vessel and anatomy visualization.

Philip’s StentBoost stent visualization feature helps better define the stent in relation to the vessel wall for more accurate placement. Philips’ new Allura Xper FD20 offers the MR/CT Roadmap feature to synchronize live fluoroscopy with previously acquired MRA/CTA datasets. Philips said this helps reduce contrast media use and X-ray dose compared to standard 2D or 3D navigation.

Veran is collaborating with GE to integrate its ig4 multimodality navigation system with Innova. The ig4 uses electromagnetic localization and image fusion to display an interventional instrument on a computer monitor that also displays a CT-based model of the target organ.

Lowering the Dose

Progress has been made in lowering X-ray dose with technical enhancements. Software now helps record and track exposure levels. Technologies were also created to allow more efficient use of the X-rays and contrast.

Innova’s dose-efficient technology, powered by the AutoEx control system, automatically and continuously adapts to customize radiation dose for each patient and procedure to help keep image quality and patient dose at optimum levels. It can reduce patient dose by as much as 40 percent without compromising image quality.

Phillips offers similar dose lowering features with its iDose technology. Its XperSwing feature also provides rotational angiography that reduces both X-ray dose and contrast usage. The C-arm rotates on a dual-axis, allowing a curved trajectory, so several anatomical views can be imaged in a single run. Conventional C-arms move along one axis, so several runs might be necessary.

For clinicians, Philips introduced DoseAware at RSNA. It offers a live tracking display of clinician X-ray dose and warns them when they enter the radiation field. It records the information and generates exposure reports.

Table Technology

Angiographic system tables have become more versatile to allow better access to the patient and better positioning for opitmal imaging. They are also being designed for use in hybrid cath labs. The newest generation of tables are motorized for accurate positing and can tilt and pan.
GE’s InnovaIQ Table features auto-positioning so the patient can be brought back into repeatable clinical positioning for 2D and 3D acquisitions. It also allows for fast transitions from one complex position to another.

Toshiba’s CAT-880B hybrid suite table offers head-to-toe tilting and side-to-side cradling to meet the needs of both interventionalists and surgeons. The table features a 550-pound table weight limit, allows for angulations of up to 16 degrees in all four directions, and offers one of the lowest table-top heights.
Siemens’s Artis zeego robotic-assisted positioning enables variable working heights. It is also configured with specific parking positions for the C-arm in hybrid rooms to maximize room space during patient transfers.

Related Content

Tryton Side Branch Stent Recognized With Premier Technology Breakthrough Award
News | Stents Bifurcation| September 21, 2017
September 21, 2017 — Cardinal Health and Tryton Medical Inc.
DISRUPT BTK Study Shows Positive Results With Lithoplasty in Calcified Lesions Below the Knee
News | Peripheral Artery Disease (PAD)| September 20, 2017
Shockwave Medical reported positive results from the DISRUPT BTK Study, which were presented at the annual...
Corindus Announces First Patient Enrolled in PRECISION GRX Registry
News | Robotic Systems| September 18, 2017
September 18, 2017 — Corindus Vascular Robotics Inc.
Two-Year ILLUMENATE Trial Data Demonstrate Efficacy of Stellarex Drug-Coated Balloon
News | Drug-Eluting Balloons| September 18, 2017
Philips announced the two-year results from the ILLUMENATE European randomized clinical trial (EU RCT) demonstrating...
Sentinel Cerebral Protection System Significantly Reduces Stroke and Mortality in TAVR
News | Embolic Protection Devices| September 18, 2017
September 18, 2017 – Claret Medical announced publication of a new study in the...
Fysicon Receives FDA Approval for QMAPP Hemodynamic Monitoring System
Technology | Hemodynamic Monitoring Systems| September 18, 2017
Fysicon announced that it has been granted 510(k) clearance by the U.S. Food and Drug Administration (FDA) for its...
Peter Schneider, M.D. presents late breaking clinical trial results at VIVA 17 in Las Vegas. Panelists (l to r) Krishna Rocha-Singh, M.D., Sean Lyden, M.D., John Kaufman, M.D., Donna Buckley, M.D.

Peter Schneider, M.D. presents late breaking clinical trial results at VIVA 17 in Las Vegas. Panelists (l to r) Krishna Rocha-Singh, M.D., Sean Lyden, M.D., John Kaufman, M.D., Donna Buckley, M.D.

Feature | Cath Lab| September 14, 2017
September 14, 2017 — Here are quick summaries for all the key late-breaking vascular and endovascular clinical trials
Mississippi Surgical and Vascular Center Uses Toshiba Ultimax-i FPD to Save Patients' Limbs
News | Angiography| September 14, 2017
The southern U.S. sees some of the highest numbers of chronic medical conditions, such as peripheral artery disease...
Sponsored Content | Videos | Structural Heart Occluders| September 13, 2017
Ziyad Hijazi, M.D., MPH, MSCAI, FACC, director of the cardiac program and chair of the Department of Pediatrics at Si
Philips Showcases Integrated Vascular Solutions at VIVA 2017
News | Peripheral Artery Disease (PAD)| September 13, 2017
Philips announced its presence at the Vascular Interventional Advances (VIVA 17) Annual Conference in Las Vegas from...
Overlay Init