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MRI with MRA in abdominal aortic aneurysm

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1. MRI with MRA in abdominal aortic aneurysm

MRI with MRA in abdominal aortic aneurysm MRI with MRA in abdominal aortic aneurysm Toggle navigation Brain Head & Neck Chest Endocrine Abdomen Musculoskeletal Skin Infectious Disease Hematology & Oncology Cohorts Diagnostics Emergency Findings Procedures Prevention & Management Pharmacy Resuscitation Trauma Emergency Procedures Ultrasound Cardiovascular Emergencies Lung Emergencies Infectious Disease Pediatrics Neurologic Emergencies Skin Exposure Miscellaneous Abuse Cancer Administration 4 (...) MRI with MRA in abdominal aortic aneurysm MRI with MRA in abdominal aortic aneurysm Aka: MRI with MRA in abdominal aortic aneurysm , AAA Magnetic Resonance Angiography II. Indications Preoperative evaluation of AAA III. Efficacy : 100% IV. Advantages Identifies proximal and distal margins of aneurysm Identifies periaortic renal V. Disadvantages Motion artifact if movement during scan VI. References Images: Related links to external sites (from Bing) These images are a random sampling from a Bing

2018 FP Notebook

2. Abdominal aortic aneurysm

Abdominal aortic aneurysm Abdominal aortic aneurysm - Symptoms, diagnosis and treatment | BMJ Best Practice You'll need a subscription to access all of BMJ Best Practice Search  Abdominal aortic aneurysm Last reviewed: February 2019 Last updated: June 2018 Summary Patients are usually asymptomatic and their abdominal aortic aneurysm is detected incidentally. In the minority of patients who experience symptoms, abdominal, back, and groin pain are typical. Ultrasound remains the definitive test (...) % vs. 5.2%) and endovascular aneurysm repair (EVAR) (2.1% vs. 1.3%). Complications of treatment include acute kidney injury, limb ischaemia, spinal cord ischaemia, anastomotic pseudoaneurysm, graft infection, graft limb occlusion, and distal embolisation. Endoleak is a complication of EVAR. Definition Abdominal aortic aneurysm (AAA) is a permanent pathological dilation of the aorta with a diameter >1.5 times the expected anteroposterior (AP) diameter of that segment, given the patient's sex

2018 BMJ Best Practice

3. Abdominal Aortic Aneurysm Follow-up (Without Repair)

contrast May Be Appropriate O MRI abdomen and pelvis without IV contrast May Be Appropriate (Disagreement) O Aortography abdomen Usually Not Appropriate ??? Radiography chest abdomen pelvis Usually Not Appropriate ??? ACR Appropriateness Criteria ® 2 AAA Follow-up (Without Repair) ABDOMINAL AORTIC ANEURYSM FOLLOW-UP (WITHOUT REPAIR) Expert Panel on Vascular Imaging: Michael Collard, MD, MA a ; Patrick D. Sutphin, MD, PhD b ; Sanjeeva P. Kalva, MD c ; Bill S. Majdalany, MD d ; Jeremy D. Collins, MD e (...) Abdominal Aortic Aneurysm Follow-up (Without Repair) New 2018 ACR Appropriateness Criteria ® 1 AAA Follow-up (Without Repair) American College of Radiology ACR Appropriateness Criteria ® Abdominal Aortic Aneurysm Follow-up (Without Repair) Variant 1: Asymptomatic abdominal aortic aneurysm surveillance (without repair). Procedure Appropriateness Category Relative Radiation Level US duplex Doppler aorta abdomen Usually Appropriate O CTA abdomen and pelvis with IV contrast Usually Appropriate

2019 American College of Radiology

4. The Society for Vascular Surgery practice guidelines on the care of patients with an abdominal aortic aneurysm

The Society for Vascular Surgery practice guidelines on the care of patients with an abdominal aortic aneurysm The Society for Vascular Surgery practice guidelines on the care of patients with an abdominal aortic aneurysm - Journal of Vascular Surgery Email/Username: Password: Remember me Search JVS Journals Search Terms Search within Search Access provided by Volume 67, Issue 1, Pages 2–77.e2 The Society for Vascular Surgery practice guidelines on the care of patients with an abdominal aortic (...) . Starnes Affiliations Department of Surgery, University of Washington, Seattle, Wash , MD l DOI: | | ---- Fig 1 The annual adult per capita cigarette consumption and age-adjusted abdominal aortic aneurysm ( AAA ) deaths per 100,000 white men by year in the United States. ---- | ---- Fig 2 A, Influence of smoking (current vs ex/never) on aneurysm enlargement in individual studies and meta-analysis (see primary source for individual study citations). B, Influence of diabetes on aneurysm enlargement

2018 Society for Vascular Surgery

5. Pulsatile Abdominal Mass, Suspected Abdominal Aortic Aneurysm

Pulsatile Abdominal Mass, Suspected Abdominal Aortic Aneurysm Revised 2016 ACR Appropriateness Criteria ® 1 Pulsatile Abdominal Mass, Suspected AAA American College of Radiology ACR Appropriateness Criteria ® Pulsatile Abdominal Mass, Suspected Abdominal Aortic Aneurysm Variant 1: Pulsatile abdominal mass, suspected abdominal aortic aneurysm. Radiologic Procedure Rating Comments RRL* US aorta abdomen 9 O CTA abdomen with IV contrast 8 ??? MRA abdomen without and with IV contrast 8 O CT abdomen (...) without IV contrast 7 ??? CT abdomen with IV contrast 7 ??? CT abdomen without and with IV contrast 7 ???? MRA abdomen without IV contrast 7 O Aortography abdomen 4 ??? FDG-PET/CT abdomen 2 ???? Rating Scale: 1,2,3 Usually not appropriate; 4,5,6 May be appropriate; 7,8,9 Usually appropriate *Relative Radiation Level ACR Appropriateness Criteria ® 2 Pulsatile Abdominal Mass, Suspected AAA PULSATILE ABDOMINAL MASS, SUSPECTED ABDOMINAL AORTIC ANEURYSM Expert Panel on Vascular Imaging: Stephen P. Reis, MD

2016 American College of Radiology

6. Abdominal Aortic Aneurysm: Interventional Planning and Follow-up

Abdominal Aortic Aneurysm: Interventional Planning and Follow-up Revised 2017 ACR Appropriateness Criteria ® 1 AAA: Interventional Planning & Follow-Up American College of Radiology ACR Appropriateness Criteria ® Abdominal Aortic Aneurysm: Interventional Planning and Follow-up Variant 1: Planning for pre-endovascular repair (EVAR) or open repair of AAA. Procedure Appropriateness Category Relative Radiation Level CTA abdomen and pelvis with IV contrast Usually Appropriate ????? MRA abdomen (...) and pelvis without IV contrast and US aorta abdomen with duplex Doppler May Be Appropriate ??? MRA abdomen and pelvis without IV contrast May Be Appropriate O US aorta abdomen with duplex Doppler May Be Appropriate O CT abdomen and pelvis without IV contrast May Be Appropriate ??? CT abdomen and pelvis with IV contrast May Be Appropriate (Disagreement) ??? X-ray abdomen and pelvis May Be Appropriate ??? ACR Appropriateness Criteria ® 2 AAA: Interventional Planning & Follow-Up ABDOMINAL AORTIC ANEURYSM

2017 American College of Radiology

7. Segmentation of Lumen and Outer wall of Abdominal Aortic Aneurysms from 3D Black-Blood MRI with a Registration Based Geodesic Active Contour Model (PubMed)

Segmentation of Lumen and Outer wall of Abdominal Aortic Aneurysms from 3D Black-Blood MRI with a Registration Based Geodesic Active Contour Model Segmentation of the geometric morphology of abdominal aortic aneurysm is important for interventional planning. However, the segmentation of both the lumen and the outer wall of aneurysm in magnetic resonance (MR) image remains challenging. This study proposes a registration based segmentation methodology for efficiently segmenting MR images (...) of abdominal aortic aneurysms. The proposed methodology first registers the contrast enhanced MR angiography (CE-MRA) and black-blood MR images, and then uses the Hough transform and geometric active contours to extract the vessel lumen by delineating the inner vessel wall directly from the CE-MRA. The proposed registration based geometric active contour is applied to black-blood MR images to generate the outer wall contour. The inner and outer vessel wall are then fused presenting the complete vessel

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2017 Medical Image Analysis

8. MRI with MRA in abdominal aortic aneurysm

MRI with MRA in abdominal aortic aneurysm MRI with MRA in abdominal aortic aneurysm Toggle navigation Brain Head & Neck Chest Endocrine Abdomen Musculoskeletal Skin Infectious Disease Hematology & Oncology Cohorts Diagnostics Emergency Findings Procedures Prevention & Management Pharmacy Resuscitation Trauma Emergency Procedures Ultrasound Cardiovascular Emergencies Lung Emergencies Infectious Disease Pediatrics Neurologic Emergencies Skin Exposure Miscellaneous Abuse Cancer Administration 4 (...) MRI with MRA in abdominal aortic aneurysm MRI with MRA in abdominal aortic aneurysm Aka: MRI with MRA in abdominal aortic aneurysm , AAA Magnetic Resonance Angiography II. Indications Preoperative evaluation of AAA III. Efficacy : 100% IV. Advantages Identifies proximal and distal margins of aneurysm Identifies periaortic renal V. Disadvantages Motion artifact if movement during scan VI. References Images: Related links to external sites (from Bing) These images are a random sampling from a Bing

2015 FP Notebook

9. Clinical Practice Guidelines for Endovascular Abdominal Aortic Aneurysm Repair: Written by the Standards of Practice Committee for the Society of Interventional Radiology and Endorsed by the Cardiovascular and Interventional Radiological Society of Europe

Clinical Practice Guidelines for Endovascular Abdominal Aortic Aneurysm Repair: Written by the Standards of Practice Committee for the Society of Interventional Radiology and Endorsed by the Cardiovascular and Interventional Radiological Society of Europe Clinical Practice Guidelines for Endovascular Abdominal Aortic Aneurysm Repair: Written by the Standards of Practice Committee for the Society of Interventional Radiology and Endorsed by the Cardiovascular and Interventional Radiological (...) Society of Europe and the Canadian Interventional Radiology Association T. Gregory Walker, MD, Sanjeeva P. Kalva, MD, Kalpana Yeddula, MBBS, Stephan Wicky, MD, Sanjoy Kundu, MD, Peter Drescher, MD, B. Janne d’Othee, MD, MPH, Steven C. Rose, MD, and John F. Cardella, MD J Vasc Interv Radiol 2010; 21:1632–1655 Abbreviations: AAA abdominal aortic aneurysm, CIN contrast medium–induced nephropathy, EVAR endovascular aneurysm repair, FDA Food and Drug Administration, IIA internal iliac artery, IMA inferior

2010 Society of Interventional Radiology

10. Abdominal Aortic Aneurysm, Rupture

is adequately assessed by using B-mode ultrasonography, CT scanning, and MRI. [ , , ] Aortography reveals only the lumen of the abdominal aortic aneurysm because laminated clot obscures the outer limit of the aneurysm wall. Therefore, it often causes underestimation of the true aortic diameter. Key pathobiologic processes of AAA progression and rupture include neovascularization, necrotic inflammation, microcalcification, and proteolytic degradation of the extracellular matrix. Future ancillary imaging (...) angiography, CT and MRI provide information about the wall of the aorta, and they delineate the presence of thrombus. [ ] They provide detail about surrounding abdominal structures and their relationship to the abdominal aortic aneurysms. Perianeurysmal fibrosis, venous anomalies (eg, retroaortic left renal vein, circumaortic venous collar), and are reliably demonstrated. However, these modalities (particularly MRI) are currently time and labor intensive, and they are not suitable for use in patients

2014 eMedicine Radiology

11. Abdominal Aortic Aneurysm, Diagnosis

obscure the aorta. Previous Next: Magnetic Resonance Imaging MRI and MRA can be used to define the extent of abdominal aortic aneurysms (AAAs). The absence of iodinated contrast material and radiation are advantages of this modality. However, MRI is more sensitive to motion than is CT, because a patient must remain motionless for a longer period than with current multidetector-row helical CT technology. In addition, the remaining organs in the abdomen are not seen as well on MRIs because of motion (...) . [ ] (See the image below.) MRI of a 77-year-old man with leg pain believed to be secondary to degenerative disk disease. During evaluation, an abdominal aortic aneurysm was discovered. In technically well-performed MRI and MRA, degree of confidence approaches 100%. These examinations clearly reveal the extent of the aneurysm. If prior abdominal surgery has been performed and if metal clips or devices were used, MRI may not be possible. If the metal is close to the aneurysm or if branch vessels or heavy

2014 eMedicine Radiology

12. Vascular Graft Infections, Mycotic Aneurysms, and Endovascular Infections: A Scientific Statement From the American Heart Association

is located in the third or fourth portion of the duodenum overlying the abdominal aortic aneurysm graft. The ulcer or thrombus should not be manipulated, because this can cause sudden massive bleeding. Figure 3. Intra-abdominal vascular graft infection: algorithm for diagnosis. CTA indicates computed tomographic angiography; EGD, esophagogastroduodenoscopy; GI, gastrointestinal; IN, indium; MRA, magnetic resonance imaging; MRI, magnetic resonance angiography; and PET, positron emission tomography (...) a bacteremia. The risk of hematogenous infection of VGI is highest in the early postoperative period (<2 months) and decreases over time because of partial endothelialization of the graft. , Transient bacteremia from a gastrointestinal, genitourinary, or dental procedure can also cause VGI but is a much less common cause than is intraoperative contamination or wound infection. , , Vogel and colleagues analyzed risk factors in almost 14 000 patients who had undergone abdominal aortic aneurysm repair

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2016 American Heart Association

13. UVA Brain and Aortic Aneurysm Study

Worrall, MD, University of Virginia Study Details Study Description Go to Brief Summary: The purpose of this study is to examine the percentage of patients who present with abdominal aortic aneurysms (AAA) will also have intracranial aneurysms (IA) and conversely; to examine the percentage of patients who present with intracranial aneurysms will also have abdominal aortic aneurysms. Condition or disease Intervention/treatment Intracranial Aneurysm Abdominal Aortic Aneurysm Other: Imaging-Ultrasound (...) links provided by the National Library of Medicine related topics: resources: (AHRQ) related information: Groups and Cohorts Go to Group/Cohort Intervention/treatment Patients presenting with IA These patients will undergo an abdominal ultrasound (Imaging - Ultrasound) to test for abdominal aortic aneurysm(s). RNA, DNA testing will be planned on banked samples Other: Imaging-Ultrasound Abdominal Ultrasound Genetic: DNA, RNA testing To test for the co-prevalence of shared genetic markers in afflicted

2014 Clinical Trials

14. Aortic Diseases

by guest on 02 April 2019patients undergoing urgent or emergent repair of acute Type A AD. 13 A similar relationship has been reported for the thoraco-abdominal aortic aneurysm repair, demonstrating a near doublingofin-hospitalmortalityatlow-(medianvolume1proced- ure/year) in comparison with high-volume hospitals (median volume 12 procedures/year; 27 vs. 15% mortality; P, 0.001) 14 and intact and ruptured open descending thoracic aneurysm repair. 15 Likewise, several reports have demonstrated (...) , aortic archaneurysm,plaquecalci?cation,thrombus,oradissectionmem- brane may be detectable if image quality is adequate. From this window, aortic coarctation can be suspected by continuous-wave Doppler; a patent ductus arteriosus may also be identi?able by colour Doppler. Using appropriate views (see above) aneurysmal dilation, external compression, intra-aortic thrombi, and dissection ?aps can be imaged and ?ow patterns in the abdominal aorta assessed. The lower abdominal aorta, below the renal

2014 European Society of Cardiology

15. Guidelines for the Management of Patients With Unruptured Intracranial Aneurysms

aneurysm compared with DSA. However, with treated aneurysms, the resulting susceptibility artifacts on MRA can cause an underestimation of the size of the residual or recurrent aneurysm, and formal DSA may be necessary to determine the need for retreatment. , As is always the case for MRI, care should be taken to ensure that the metallic implants are compatible with the magnetic environment of the MRI scanner. In the follow-up of treated UIAs, magnetic resonance is a reasonable option given the high (...) with unknown years. When studies that used intra-arterial digital subtraction angiography (DSA) were compared with those that used magnetic resonance angiography (MRA), there was no difference in prevalence, but prevalence was significantly lower in studies that used MRI and remained lower after adjustment for age and sex. When the studies that primarily used MRI were excluded, the overall prevalence was 3.5% (95% CI, 2.7%–4.7%). Although the crude prevalence of UIAs was higher in studies using imaging

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2015 American Heart Association

16. Guidelines for the Management of Patients with Unruptured Intracranial Aneurysms

for MRI, care should be taken to ensure that the metallic implants are compatible with the magnetic environment of the MRI scanner. 170–172 In the follow-up of treated UIAs, magnetic resonance is a reasonable option given the high sensitivity for a residual aneurysm, lack of beam-hardening artifacts seen with CT, and invasiveness of DSA. For untreated UIAs already diagnosed, the lack of ionizing radiation or contrast (for TOF MRA) would make it the option of choice in those patients with renal (...) resonance angi- ography (MRA), there was no difference in prevalence, but prevalence was significantly lower in studies that used MRI and remained lower after adjustment for age and sex. 11 When the studies that primarily used MRI were excluded, the overall prevalence was 3.5% (95% CI, 2.7%–4.7%). 11 Although the crude prevalence of UIAs was higher in studies using imaging versus autopsy definitions, there was no difference in preva- lence estimates after adjustment for sex, age, and comorbidi- ties. 11

2015 Congress of Neurological Surgeons

17. Guidelines for the management of patients with unruptured intracranial aneurysms

% to 6.0%, with higher prevalence in women and an increased prevalence with age. A recent cross-sectional study from China of 4813 adults aged 35 to 75 years found a prevalence of 7.0% based on MRA, also with a higher prevalence in women than men. In the population-based Rotterdam Study, in which 2000 patients (mean age 63 years; range, 45.7–96.7 years) underwent protocol-driven high-resolution structural brain MRI, the prevalence of incidental intracranial aneurysms (IAs) was found to be 1.8 (...) susceptibility artifacts on MRA can cause an underestimation of the size of the residual or recurrent aneurysm, and formal DSA may be necessary to determine the need for retreatment. , As is always the case for MRI, care should be taken to ensure that the metallic implants are compatible with the magnetic environment of the MRI scanner. In the follow-up of treated UIAs, magnetic resonance is a reasonable option given the high sensitivity for a residual aneurysm, lack of beam-hardening artifacts seen with CT

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2015 American Academy of Neurology

18. Thoracic Aortic Aneurysm

for the follow-up of patients with thoracic aortic diseases. MRA in the sagittal plane is effective for depicting the origins of the arch branches and visceral arteries of the abdominal aorta and their relationship to the aneurysm. MRI and MRA are used to monitor the maximum diameter and extent of the thoracic aortic aneurysm. A maximum diameter exceeding 6 cm indicates the need for surgical repair. Regular monitoring is important for patients with and other conditions associated with progressive aortic (...) of acute aortic dissection, allowing the identification of more patients with complex conditions who are candidates for surgery. [ ] In patients with aortic aneurysm, aortic dissection is the most feared catastrophic event. Rupture of a thoracic aortic aneurysm is more frequent than abdominal aortic rupture. Thus, high clinical suspicion is required, and time is of the essence. Imaging techniques, including MRI, TEE, or CT scanning, should be quickly utilized. Preferred examination Although aortic

2014 eMedicine Radiology

19. Acute Chest Pain ? Suspected Aortic Dissection

to increased photoelectric absorption at 80 kVp, DECT may allow for a smaller volume of contrast material to be administered [34,35]. Further outcomes studies are needed to assess the performance of DECT in the acute setting. ACR Appropriateness Criteria ® 5 Acute Chest Pain — Suspected Aortic Dissection Magnetic Resonance Angiography MRA allows the noninvasive visualization of the thoracic and abdominal aorta in multiple projections without the use of ionizing radiation. Patients can also be imaged (...) cardiac information such as aortic regurgitation and left ventricular function can be assessed. Newer gadolinium contrast-enhanced 3-D contrast-enhanced MRA (CE-MRA) techniques permit rapid acquisition of MR angiograms of the thoracic and abdominal aorta and their branch vessels. These techniques allow coverage of large volumes with and without breath-holding, and 3-D datasets may be reconstructed. 3-D CE-MRA permits easy identification of both the true and false lumen and enables identification

2014 American College of Radiology

20. Abdominal Aortic Aneurysms (AAA)

abdominal ultrasonography, CT, or MRI is done for other reasons. An AAA should be considered in elderly patients who present with acute abdominal or back pain whether a palpable pulsatile mass is present or not. Abdominal Aortic Aneurysm (Ultrasound) © 2017 Elliot K. Fishman, MD. When symptoms or physical examination findings suggest AAA, abdominal ultrasonography or abdominal CT is usually the test of choice. Symptomatic patients should have immediate testing to make the diagnosis before catastrophic (...) Abdominal Aortic Aneurysms (AAA) Abdominal Aortic Aneurysms (AAA) - Cardiovascular Disorders - MSD Manual Professional Edition Brought to you by The trusted provider of medical information since 1899 SEARCH SEARCH MEDICAL TOPICS Common Health Topics Resources QUIZZES & CASES Quizzes Cases The trusted provider of medical information since 1899 SEARCH SEARCH MEDICAL TOPICS Common Health Topics Resources QUIZZES & CASES Quizzes Cases / / / / IN THIS TOPIC OTHER TOPICS IN THIS CHAPTER Test your

2013 Merck Manual (19th Edition)

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