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https://www.readbyqxmd.com/read/28322426/diagnostic-value-of-contrast-enhanced-magnetic-resonance-angiography-in-large-vessel-vasculitis
#1
Sabine Adler, Marco Sprecher, Felix Wermelinger, Thorsten Klink, Harald Bonel, Peter M Villiger
OBJECTIVE: To evaluate contrast-enhanced magnetic resonance angiography (MRA) in diagnosis of inflammatory aortic involvement in patients with clinical suspicion of large-vessel vasculitis. PATIENTS AND METHODS: Seventy-five patients, mean age 62 years (range 16-82 years), 44 female and 31 male, underwent gadolinium-enhanced MRA and were evaluated retrospectively. Thoracic MRA was performed in 32 patients, abdominal MRA in 7 patients and both thoracic and abdominal MRA in 36 patients...
March 21, 2017: Swiss Medical Weekly
https://www.readbyqxmd.com/read/28321915/acceleration-of-asl-based-time-resolved-mr-angiography-by-acquisition-of-control-and-labeled-images-in-the-same-shot-actress
#2
Yuriko Suzuki, Noriyuki Fujima, Tetsuo Ogino, James Alastair Meakin, Akira Suwa, Hiroyuki Sugimori, Marc Van Cauteren, Matthias J P van Osch
PURPOSE: Noncontrast 4D-MR-angiography (MRA) using arterial spin labeling (ASL) is beneficial because high spatial and temporal resolution can be achieved. However, ASL requires acquisition of labeled and control images for each phase. The purpose of this study is to present a new accelerated 4D-MRA approach that requires only a single control acquisition, achieving similar image quality in approximately half the scan time. METHODS: In a multi-phase Look-Locker sequence, the first phase was used as the control image and the labeling pulse was applied before the second phase...
March 20, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28318302/isolated-subscapularis-repair-in-irreparable-posterosuperior-massive-rotator-cuff-tears-involving-the-subscapularis-tendon
#3
Sung-Jae Kim, Yun-Rak Choi, Min Jung, Won-Yong Lee, Yong-Min Chun
BACKGROUND: No previous study has examined whether isolated subscapularis tendon repair in irreparable posterosuperior massive rotator tears involving the subscapularis tendon in relatively young patients without arthritis can yield satisfactory outcomes. HYPOTHESIS: We hypothesized that this procedure would produce favorable outcomes in patients who might otherwise be candidates for reverse arthroplasty. STUDY DESIGN: Case series; Level of evidence, 4...
March 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28315509/evaluation-of-late-cerebral-vascular-complications-in-cranially-irradiated-pediatric-cancer-patients-with-magnetic-resonance-angiography
#4
Serhan Kupeli, Kenan Bicakci, Gulay Sezgin, Ibrahim Bayram
BACKGROUND: We aimed to establish the early diagnosis of cerebral vascular complications by using cerebral magnetic resonance angiography (MRA) in patients who were treated with cranial RT in childhood as part of their cancer treatment. PROCEDURE: Patients who had received cranial RT before the age of 18 and had been in remission for at least 1 year were enrolled in the study. A data form including demographic and clinical characteristics and findings of cerebral MRA was filled in for each patient...
March 18, 2017: Tumori
https://www.readbyqxmd.com/read/28306332/contrast-enhanced-pulmonary-mra-for-the-primary-diagnosis-of-pulmonary-embolism-current-state-of-the-art-and-future-directions
#5
Donald G Benson, Mark L Schiebler, Michael D Repplinger, Christopher J François, Thomas M Grist, Scott B Reeder, Scott K Nagle
Computed tomographic pulmonary angiography (CTPA) is currently considered the imaging standard of care for the diagnosis of pulmonary embolism (PE). Recent advances in contrast enhanced pulmonary magnetic resonance angiography (MRA) techniques have led to increased use of this modality for the detection of PE in the proper clinical setting. This review is intended to provide an introduction to the state of the art techniques used in pulmonary MRA for the detection of PE and to discuss possible future directions for this modality...
March 17, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28306228/diagnosis-natural-history-and-management-in-vascular-ehlers-danlos-syndrome
#6
Peter H Byers, John Belmont, James Black, Julie De Backer, Michael Frank, Xavier Jeunemaitre, Diana Johnson, Melanie Pepin, Leema Robert, Lynn Sanders, Nigel Wheeldon
Vascular Ehlers Danlos syndrome (vEDS) is an uncommon genetic disorders characterized by arterial aneurysm, dissection and rupture, bowel rupture, and rupture of the gravid uterus. The frequency is estimated as 1/50,000-1/200,000 and results from pathogenic variants in COL3A1, which encodes the chains of type III procollagen, a major protein in vessel walls and hollow organs. Initial diagnosis depends on the recognitions of clinical features, including family history. Management is complex and requires multiple specialists who can respond to and manage the major complications...
March 2017: American Journal of Medical Genetics. Part C, Seminars in Medical Genetics
https://www.readbyqxmd.com/read/28303317/evaluation-of-the-applicability-of-territorial-arterial-spin-labeling-in-meningiomas-for-presurgical-assessments-compared-with-3-dimensional-time-of-flight-magnetic-resonance-angiography
#7
Yiping Lu, Shihai Luan, Li Liu, Ji Xiong, Jianbo Wen, Jianxun Qu, Daoying Geng, Bo Yin
OBJECTIVES: To prospectively evaluate the application of territorial arterial spin labelling (t-ASL) in comparison with unenhanced three-dimensional time-of-flight magnetic resonance angiography (3D-TOF-MRA) in the identification of the feeding vasculature of meningiomas. METHODS: Thirty consecutive patients with suspected meningiomas underwent conventional MR imaging, unenhanced 3D-TOF-MRA and t-ASL scanning. Four experienced neuro-radiologists assessed the feeding vessels with different techniques separately...
March 16, 2017: European Radiology
https://www.readbyqxmd.com/read/28302605/quantifying-intracranial-internal-carotid-artery-stenosis-on-mr-angiography
#8
H Baradaran, P Patel, G Gialdini, K Al-Dasuqi, A Giambrone, H Kamel, A Gupta
BACKGROUND AND PURPOSE: Intracranial atherosclerosis is a common cause of ischemic stroke. Intracranial stenosis is most commonly quantified by the Warfarin-Aspirin Symptomatic Intracranial Disease method, which involves calculating a ratio of luminal diameter measurements on conventional angiography. Our purpose was to determine whether a single linear measurement of the narrowest caliber of the intracranial ICA on MRA can accurately predict Warfarin-Aspirin Symptomatic Intracranial Disease stenosis measurements...
March 16, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28294455/integration-of-arterial-spin-labeling-into-stereotactic-radiosurgery-planning-of-cerebral-arteriovenous-malformations
#9
Onur Ozyurt, Alp Dincer, Mehmet Erdem Yildiz, Selcuk Peker, Meltem Yilmaz, Meric Sengoz, Cengizhan Ozturk
PURPOSE: To test whether the combined use of 4D arterial spin labeling angiography (4D ASL) and contrast-enhanced magnetic resonance angiography (4D CE-MRA) can work as a prospective alternative to digital subtraction angiography (DSA) for the delineation of the arteriovenous malformation (AVM) nidus in stereotactic radiosurgery (SRS) planning. MATERIALS AND METHODS: A custom 4D ASL sequence and a proof-of-concept software tool to integrate 4D ASL data to SRS planning were implemented...
March 10, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28289923/tocilizumab-reverses-cerebral-vasculopathy-in-a-patient-with-homozygous-samhd1-mutation
#10
REVIEW
Michael Henrickson, Heng Wang
An auto-inflammatory syndrome consequent to SAMHD1 mutations involves cerebral vasculopathy characterized by multifocal stenosis and aneurysms within large arteries, moyamoya, chronic ischemia, and early-onset strokes (SAMS). While this condition involves the innate immune system, additional clinical features mimic systemic lupus erythematosus. Mutations in this gene can also cause a subset of the rare genetic condition Aicardi-Goutières syndrome. To date, no established therapy successfully prevents disease progression...
March 13, 2017: Clinical Rheumatology
https://www.readbyqxmd.com/read/28289534/dysphagia-after-arteria-lusoria-dextra-surgery-anatomical-considerations-before-redo-surgery
#11
Judith Mayer, Natascha van der Werf-Grohmann, Johannes Kroll, Ute Spiekerkoetter, Brigitte Stiller, Jochen Grohmann
Aberrant right subclavian artery (arteria lusoria) is the most common congenital root anomaly, remaining asymptomatic in most cases. Nevertheless, some of the 20%-40% of those affected present tracheo-esophageal symptoms. We report on a 6-year-old previously healthy girl presenting with progressive dysphagia over 4 wk. Diagnostics including barium swallow, echocardiography and magnetic resonance angiography (MRA) revealed a retro-esophageal compression by an aberrant right subclavian artery. Despite the successful, uneventful transposition of this arteria lusoria to the right common carotid via right-sided thoracotomy, the girl was suffering from persisting dysphagia...
February 26, 2017: World Journal of Cardiology
https://www.readbyqxmd.com/read/28285838/incidental-findings-on-pediatric-abdominal-magnetic-resonance-angiography
#12
Nattinee Leelakanok, Matthew A Zapala, Emily A Edwards, Andrew S Phelps, John D Mackenzie, Jesse Courtier
RATIONALE AND OBJECTIVES: Abdominal magnetic resonance angiography (MRA) has gained favor in pediatric patients owing to its lack of ionizing radiation and noninvasive nature. Reports exist regarding incidental findings on body MRA in adult patients. However, the incidental findings in pediatric abdominal MRA have not been previously reported. Our study aims to determine the frequencies, characteristics, and categories of incidental findings in pediatric patients undergoing abdominal MRA...
March 9, 2017: Academic Radiology
https://www.readbyqxmd.com/read/28281006/signal-reduction-of-donor-artery-on-mri-after-superficial-temporal-artery-to-middle-cerebral-artery-anastomosis-a-retrospective-analysis
#13
Satoshi Koizumi, Toshikazu Kimura, Tomohiro Inoue
OBJECT: Microsurgical anastomosis from the superficial temporal artery (STA) to the middle cerebral artery (MCA) is a treatment option for appropriately selected patients with cranial atherosclerotic steno-occlusive disease (CASD). However, the long-term efficacy and patency of the donor artery remain unclear. We reviewed the signal intensity of the donor artery on magnetic resonance angiography (MRA) after STA-MCA anastomosis in patients with CASD and clarified the incidence of and risk factors for reduction in postoperative signal of STA...
March 9, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28275946/a-network-meta-analysis-of-clinical-management-strategies-for-treatment-resistant-hypertension-making-optimal-use-of-the-evidence
#14
Peter Makai, Joanna IntHout, Jaap Deinum, Kevin Jenniskens, Gert Jan van der Wilt
BACKGROUND: With the addition of surgical interventions to current medicinal treatments, it is increasingly challenging for clinicians to rationally choose among the various options for treating patients with apparent treatment-resistant hypertension (ATRHTN). This study aims to establish the comparative effectiveness of mineralocorticoid receptor antagonists (MRA), renal denervation (RDN), darusentan and central arteriovenous anastomosis (CAA) for patients with ATRHTN by performing a network meta-analysis...
March 8, 2017: Journal of General Internal Medicine
https://www.readbyqxmd.com/read/28271689/clinical-correlates-and-reference-intervals-for-cystatin-c-in-a-han-population-from-southeast-china
#15
Min He, Pei-Feng Ke, Wei-Ye Chen, Hai-Biao Lin, Yun-Xiu Wang, Ze-Min Wan, Xin-Zhong Wu, Jun-Hua Zhuang, Xian-Zhang Huang
BACKGROUND: Cystatin C (CysC) is an endogenous filtration marker for estimation of kidney function. This study aimed to define the reference interval (RI) for serum CysC in a southeast Chinese adult population and to explore the variables that affect serum CysC levels. METHODS: 532 reference individuals (259 male, 273 female, aged 18 - 79 years) were recruited from Guangzhou, China. Multiple regression analysis (MRA) was used to investigate the association between serum CysC levels and clinical factors including age, gender, body mass index, lifestyle, and biochemistry parameters...
March 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/28271356/geometric-modeling-of-hepatic-arteries-in-3d-ultrasound-with-unsupervised-mra-fusion-during-liver-interventions
#16
Maxime Gérard, François Michaud, Alexandre Bigot, An Tang, Gilles Soulez, Samuel Kadoury
PURPOSE: Modulating the chemotherapy injection rate with regard to blood flow velocities in the tumor-feeding arteries during intra-arterial therapies may help improve liver tumor targeting while decreasing systemic exposure. These velocities can be obtained noninvasively using Doppler ultrasound (US). However, small vessels situated in the liver are difficult to identify and follow in US. We propose a multimodal fusion approach that non-rigidly registers a 3D geometric mesh model of the hepatic arteries obtained from preoperative MR angiography (MRA) acquisitions with intra-operative 3D US imaging...
March 7, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28271154/renal-artery-and-parenchymal-changes-after-renal-denervation-assessment-by-magnetic-resonance-angiography
#17
Margreet F Sanders, Pieter Jan van Doormaal, Martine M A Beeftink, Michiel L Bots, Fadl Elmula M Fadl Elmula, Jesse Habets, Frank Hammer, Pavel Hoffmann, Lotte Jacobs, Patrick B Mark, Alexandre Persu, Jean Renkin, Giles Roditi, Wilko Spiering, Jan A Staessen, Alison H Taylor, Willemien L Verloop, Eva E Vink, Evert-Jan Vonken, Michiel Voskuil, Tim Leiner, Peter J Blankestijn
OBJECTIVES: Relatively little is known about the incidence of long-term renal damage after renal denervation (RDN), a potential new treatment for hypertension. In this study the incidence of renal artery and parenchymal changes, assessed with contrast-enhanced magnetic resonance angiography (MRA) after RDN, is investigated. METHODS: This study is an initiative of ENCOReD, a collaboration of hypertension expert centres. Patients in whom an MRA was performed before and after RDN were included...
March 7, 2017: European Radiology
https://www.readbyqxmd.com/read/28268151/utility-of-repeat-cerebrovascular-imaging-among-hospitalized-stroke-patients
#18
Syed Ali Raza, Vijay Javalkar, Seena Dehkharghani, Archana Kudrimoti, Amit Saindane, Mark Mullins, Fadi Nahab
BACKGROUND AND PURPOSE: The purpose of this study is to evaluate the frequency and clinical utility of repeat cerebrovascular imaging with computed tomography angiography (CTA) of the head after contrast-enhanced magnetic resonance angiography (CE-MRA) of the head in acute stroke patients. MATERIALS AND METHODS: All stroke patients admitted to 2 academic medical centers from January 1, 2012 through December 31, 2014 were identified as part of prospective radiology database if they underwent CE-MRA of the head followed by subsequent CTA of the head within 7 days...
March 3, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28265729/quality-control-of-the-foot-revascularization-using-indocyanine-green-fluorescence-imaging
#19
Nicla Settembre, Petteri Kauhanen, Anders Albäck, Kristyna Spillerova, Maarit Venermo
OBJECTIVES: Critical limb ischemia (CLI) is a clinical diagnosis, confirmed by objective tests, usually ankle-brachial index (ABI), toe pressure (TP) and TcPO2. Furthermore, the anatomical lesions in patients affected by CLI were visualized by ultrasound, angiography, CTA, or MRA. Indocyanine green fluorescence imaging (ICG-FI) is a diagnostic modality for assessing foot perfusion. We aimed to study the usefulness of ICG-FI in the quality control of revascularization. MATERIALS AND METHODS: One hundred and four CLI limbs in 101 patients were studied with ICG-FI using SPY Elite before and after open or endovascular revascularization...
March 6, 2017: World Journal of Surgery
https://www.readbyqxmd.com/read/28265722/mr-imaging-of-carotid-webs
#20
Mari E Boesen, Prasanna Venkatesan Eswaradass, Dilip Singh, Alim P Mitha, Mayank Goyal, Richard Frayne, Bijoy K Menon
PURPOSE: We propose a magnetic resonance (MR) imaging protocol for the characterization of carotid web morphology, composition, and vessel wall dynamics. The purpose of this case series was to determine the feasibility of imaging carotid webs with MR imaging. METHODS: Five patients diagnosed with carotid web on CT angiography were recruited to undergo a 30-min MR imaging session. MR angiography (MRA) images of the carotid artery bifurcation were acquired. Multi-contrast fast spin echo (FSE) images were acquired axially about the level of the carotid web...
March 6, 2017: Neuroradiology
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