 |
|
MRI better than MDCT in detecting endoleaks, study says
April 14, 2008Contrast-enhanced MR imaging is significantly superior to 16 slice multidetector CT in the detection of endoleaks after endovascular repair of abdominal aortic aneurisms (EVAR), according to a recent study conducted by researchers at Ospedale San Giovanni in Bellinzona, Switzerland.
"Endovascular repair of abdominal aortic aneurysms has become a viable alternative treatment to open surgery for many patients. Endoleak development represents a complication of endovascular aortic aneurysm repair and is characterized by blood flow outside the stent-graft lumen but within the aneurysm sac," said Rolf Wyttenbach, MD, lead author of the study. "Patients after EVAR need livelong imaging surveillance to detect endoleaks. CT is most commonly used for imaging follow-up of these patients. , A few prior studies suggested that MRI may be superior to CT for the detection of endoleaks. However, these studies mostly used single or 4-row MDCT and standard gadolinium contrast media for MR imaging," he said.
The study consisted of 43 patients who had undergone EVAR. Each of the patients had both MDCT and MRI within one week of the procedure. According to the study, MRI was performed using a high relaxivity contrast medium and for MDCT, an iodine containing agent was used. Upon the completion of the study, two observers evaluated MRI and MDCT separately.
The study showed that 21 endoleaks were detected in 18 patients. Sensitivity, specificity and accuracy for endoleak detection were 100%, 96% and 98% for reader 1 and 90%, 81% and 85% for reader 2 on MRI and 48%, 96% and 74% for both readers on MDCT.
"The results indicate that MR is a good choice for diagnosing endoleaks. In addition, MRI does not expose the patients to radiation and the MR contrast agent is less nephrotoxic in the clinically used dose compared to iodinated contrast agents used for CT. For this reason MRI may become a preferred imaging modality to follow-up patients after endovascular aneurysm repair," said Dr. Wyttenbach.
American Roentgen Ray Society
The study showed that 21 endoleaks were detected in 18 patients. Sensitivity, specificity and accuracy for endoleak detection were 100%, 96% and 98% for reader 1 and 90%, 81% and 85% for reader 2 on MRI and 48%, 96% and 74% for both readers on MDCT.
"The results indicate that MR is a good choice for diagnosing endoleaks. In addition, MRI does not expose the patients to radiation and the MR contrast agent is less nephrotoxic in the clinically used dose compared to iodinated contrast agents used for CT. For this reason MRI may become a preferred imaging modality to follow-up patients after endovascular aneurysm repair," said Dr. Wyttenbach.
American Roentgen Ray Society
Study points to new way to predict death risk from torn aorta
Each year, 10,000 Americans suffer a sudden tear in the lining of their body's largest blood vessel, the aorta. It's often misdiagnosed, and it can kill if not treated immediately. Actor John Ritter died of such a tear in 2003.
Stent-Grafts: A safe therapeutic option for patients with impending rupture of the chest aorta
IMPORTANT: This press release accompanies a poster or oral session given at the ESC Congress 2003. Written by the investigator himself/herself, this press release does not necessarily reflect the opinion of the European Society of Cardiology True aneurysms and dissecting aneurysms (see figure 1) of the chest aorta both represent life-threatening situations since with increasing diameters they tend to rupture and lead to fatal bleeding. Surgical repair of such aneurysms and interposition of vascular protheses were until recently the only treatment option for complicated cases (diameter „d 5.5 cm; impending rupture; malperfusion syndrome; recurrent pain). Although great strides have been
More Endoleaks Current Events and Endoleaks News Articles
 |
Endoleaks and Endotension: Current Consensus on Their Nature and Significance by Frank J. Veith (Editor), Richard Baum (Editor) Albert Einstein College of Medicine, New York City, NY. Contains guidelines in the detection and treatment of various endoleaks. Addresses depressurizing the aneurysm sac, prevention of endoleak reoccurrence and graft migration, assessment of the efficacy of device placement, examination of aneurysm morphology, and much more. Expanded-outline format. |
 |
Detection of Endoleaks in CT Data for Monitoring of AAA Stents: Backgrounds, Image Segmentation, Experiments, and Evaluation by Jing Lu (Author) The book describes an efficient automatic algorithm for the segmentation of the inner and outer boundary of an abdominal aortic aneurysm in cross-sectional computed tomography angiography acquisitions. It covers the medical and technical background, the related publications for such problem, the algorithm implemented by us to segment the abdominal aortic aneurysm in detail, and the experiments and evaluation as well. Readers will thus be informed the motivation and challenge in doing arotic aneurysm segmentation, how this problem can be solved and how good the result is.This book is intended for all those who work in the field of medical image segmentation in CT, specially in aortic aneurysm segmentation. |
|
ENDOLEAKS & ENDOTENSION by Richard Baum (Author) | |
|
Endoleaks and Endotension: Current Consensus on Their Nature and Significance by Richard Baum (Author) |
| © 2009 BrightSurf.com |