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Carotid imaging

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https://www.readbyqxmd.com/read/27913444/correlation-of-retinal-arterial-wall-thickness-with-atherosclerosis-predictors-in-type-2-diabetes-without-clinical-retinopathy
#1
Shigeta Arichika, Akihito Uji, Tomoaki Murakami, Kiyoshi Suzuma, Norimoto Gotoh, Nagahisa Yoshimura
AIMS: To evaluate retinal arterial wall thickness (WT) using high-resolution retinal imaging in patients with type 2 diabetes and assess its correlation with risk factors for arteriosclerosis. METHODS: Outer diameter, inner diameter and WT of the retinal artery were measured using adaptive optics scanning laser ophthalmoscopy in 28 patients with type 2 diabetes without clinically apparent diabetic retinopathy and normal volunteers. Laboratory values and intima-media thickness (IMT) in the common carotid artery were measured...
December 2, 2016: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/27913325/increasing-axial-resolution-of-ultrasonic-imaging-with-a-joint-sparse-representation-model
#2
Junbo Duan, Hui Zhong, Bowen Jing, Siyuan Zhang, Mingxi Wan
The axial resolution of ultrasonic imaging is confined by the temporal width of acoustic pulse generated by the transducer, which has a limited bandwidth. Deconvolution can eliminate this effect and, therefore, improve the resolution. However, most ultrasonic imaging methods perform deconvolution scan line by scan line, and therefore the information embedded within the neighbor scan lines is unexplored, especially for those materials with layered structures such as blood vessels. In this paper, a joint sparse representation model is proposed to increase the axial resolution of ultrasonic imaging...
December 2016: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/27913324/beamforming-through-regularized-inverse-problems-in-ultrasound-medical-imaging
#3
Teodora Szasz, Adrian Basarab, Denis Kouame
Beamforming (BF) in ultrasound (US) imaging has significant impact on the quality of the final image, controlling its resolution and contrast. Despite its low spatial resolution and contrast, delay-and-sum (DAS) is still extensively used nowadays in clinical applications, due to its real-time capabilities. The most common alternatives are minimum variance (MV) method and its variants, which overcome the drawbacks of DAS, at the cost of higher computational complexity that limits its utilization in real-time applications...
December 2016: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/27909098/reversible-disruption-of-neuronal-mitochondria-by-ischemic-and-traumatic-injury-revealed-by-quantitative-two-photon-imaging-in-the-neocortex-of-anesthetized-mice
#4
Mikhail Kislin, Jeremy Sword, Ioulia V Fomitcheva, Deborah Croom, Evgeny Pryazhnikov, Eero Lihavainen, Dmytro Toptunov, Heikki Rauvala, Andre S Ribeiro, Leonard Khiroug, Sergei A Kirov
: Mitochondria play a variety of functional roles in cortical neurons, from metabolic support and neuroprotection to the release of cytokines that trigger apoptosis. In dendrites, mitochondrial structure is closely linked to their function, and fragmentation (fission) of the normally elongated mitochondria indicates loss of their function under such pathological conditions as stroke and brain trauma. Using in vivo two-photon microscopy in mouse brain, we quantified mitochondrial fragmentation in a full spectrum of cortical injuries ranging from severe to mild...
December 1, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27908279/co-existing-intracranial-and-extracranial-carotid-artery-atherosclerotic-plaques-and-recurrent-stroke-risk-a-three-dimensional-multicontrast-cardiovascular-magnetic-resonance-study
#5
Yilan Xu, Chun Yuan, Zechen Zhou, Le He, Donghua Mi, Rui Li, Yuanyuan Cui, Yilong Wang, Yongjun Wang, Gaifen Liu, Zhuozhao Zheng, Xihai Zhao
BACKGROUND: As a systemic disease, atherosclerosis commonly affects intracranial and extracranial carotid arteries simultaneously which is defined as co-existing plaques. Previous studies demonstrated that co-existing atherosclerotic diseases are significantly associated with ischemic cerebrovascular events. The aim of this study was to investigate the characteristics of co-existing intracranial and extracranial carotid atherosclerotic plaques and their relationships with recurrent stroke by using 3D multi-contrast magnetic resonance (MR) vessel wall imaging...
December 2, 2016: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/27906089/esophageal-perforation-after-perioperative-transesophageal-echocardiography-a-case-report
#6
Hyun-Chang Kim, Jung-Hyou Oh, Yong-Cheol Lee
BACKGROUND: Transesophageal echocardiography is widely used in cardiac surgery. Transesophageal echocardiography probe insertion and manipulation can injure the esophagus. CASE PRESENTATION: A 76-year-old Asian man was admitted to our hospital for coronary artery bypass graft revascularization surgery. A right carotid endarterectomy was successfully performed 2 days before coronary artery bypass graft revascularization surgery. After the coronary artery bypass graft revascularization surgery was done successfully, postoperative computed tomography and esophagography revealed perforation of the middle esophagus...
December 1, 2016: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/27905124/assessment-of-early-atherosclerosis-and-left-ventricular-dysfunction-in-children-with-21-hydroxylase-deficiency
#7
Rahmi Özdemir, Hüseyin Anil Korkmaz, Mehmet Küçük, Cem Karadeniz, Timur Meşe, Behzat Özkan
AIM: We analysed 25 children with 21-hydroxylase deficiency who received glucocorticoid and/or mineralocorticoid treatment for at least 12 months to determine the effects of the disease and its treatment on vascular structures and ventricular function. METHODS: Twenty-five patients with 21-hydroxylase-deficient congenital adrenal hyperplasia (CAH) and 25 control subjects were enrolled into this observational, cross-sectional study. The patients were investigated in terms of fasting blood glucose and insulin; fasting serum lipid profile; serum 17-hydroxyprogesterone; dehydroepiandrosterone sulphate; androstenedione; and adrenocorticotropic hormone...
November 7, 2016: Clinical Endocrinology
https://www.readbyqxmd.com/read/27903119/the-learning-curve-in-endoscopic-endonasal-resection-of-craniopharyngiomas
#8
Varun R Kshettry, Hyunwoo Do, Khaled Elshazly, Christopher J Farrell, Gurston Nyquist, Marc Rosen, James J Evans
OBJECTIVE There is a paucity of literature regarding the learning curve associated with performing endoscopic endonasal cranial base surgery. The purpose of this study was to determine to what extent a learning curve might exist for endoscopic endonasal resection in cases of craniopharyngiomas. METHODS A retrospective review was performed for all endoscopic endonasal craniopharyngioma resections performed at Thomas Jefferson University from 2005 to 2015. To assess for a learning curve effect, patients were divided into an early cohort (2005-2009, n = 20) and a late cohort (2010-2015, n = 23)...
December 2016: Neurosurgical Focus
https://www.readbyqxmd.com/read/27903112/bypass-surgery-to-treat-symptomatic-fusiform-dilation-of-the-internal-carotid-artery-following-craniopharyngioma-resection-report-of-2-cases
#9
Long Wang, Xiang'en Shi, Fangjun Liu, Hai Qian
Fusiform dilation of the internal carotid artery (FDICA) is an infrequent vascular complication following resection of suprasellar lesions in the pediatric population, and its course appears to be benign without apparent clinical symptoms. However, data correlating symptomatic FDICA with bypass surgery are scarce. The authors here report 2 symptomatic cases that were treated using internal maxillary artery bypass more than 5 years after total removal of a craniopharyngioma at an outside institution. Both cases of FDICA were resected to relieve the mass effect and to expose the craniopharyngioma...
December 2016: Neurosurgical Focus
https://www.readbyqxmd.com/read/27900327/migrating-fish-bone-piercing-the-common-carotid-artery-thyroid-gland-and-causing-deep-neck-abscess
#10
Hafizah Husna Johari, Bee-Lian Khaw, Zulkifli Yusof, Irfan Mohamad
Foreign body (FB) ingestion is very common in Malaysian population. The most commonly ingested FB is fish bone. Common presenting symptoms include FB sensation, odynophagia and or sharp pricking pain during swallowing. A careful history and physical examination is very important. Despite negative laryngoscopy and rigid esophagoscopy, persistent symptoms warrants further radiographic imaging studies. The FB can migrate extraluminally and involve other important adjacent structures of the neck and along the digestive tract...
November 16, 2016: World Journal of Clinical Cases
https://www.readbyqxmd.com/read/27899331/comparison-of-7t-and-3t-mri-in-patients-with-moyamoya-disease
#11
Byeong Ho Oh, Hyeong Cheol Moon, Hyeon Man Baek, Youn Joo Lee, Sang Woo Kim, Young Jai Jeon, Gun Seok Lee, Hong Rae Kim, Jai Ho Choi, Kyung Soo Min, Mou Seop Lee, Young Gyu Kim, Dong Ho Kim, Won Seop Kim, Young Seok Park
Magnetic resonance imaging and magnetic resonance angiography (MRI/MRA) are widely used for evaluating the moyamoya disease (MMD). This study compared the diagnostic accuracy of 7Tesla (T) and 3T MRI/MRA in MMD. In this case control study, 12 patients [median age: 34years; range (10-66years)] with MMD and 12 healthy controls [median age: 25years; range (22-59years)] underwent both 7T and 3T MRI/MRA. To evaluate the accuracy of MRI/MRA in MMD, five criteria were compared between imaging systems of 7T and 3T: Suzuki grading system, internal carotid artery (ICA) diameter, ivy sign, flow void of the basal ganglia on T2-weighted images, and high signal intensity areas of the basal ganglia on time-of-flight (TOF) source images...
November 26, 2016: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/27897128/defining-the-limits-of-endoscopic-access-to-internal-auditory-canal
#12
Adam Master, Mickie Hamiter, Maura Cosetti
OBJECTIVE: To quantify surgical access to the internal auditory canal (IAC) using an exclusively endoscopic transcanal approach (EETA) and investigate surgically relevant relationships with neurovascular and osseous landmarks of the temporal bone. MATERIALS AND METHODS: Anatomical dissection of two paired temporal bones and 15 unpaired temporal bones was performed using an exclusively endoscopic approach to IAC. The dissection proceeded until the cerebellopontine angle (CPA) could be accessed...
November 28, 2016: Journal of International Advanced Otology
https://www.readbyqxmd.com/read/27895040/the-role-of-non-invasive-cardiovascular-imaging-in-the-assessment-of-cardiovascular-risk-in-rheumatoid-arthritis-where-we-are-and-where-we-need-to-be
#13
REVIEW
Graham J Fent, John P Greenwood, Sven Plein, Maya H Buch
This review assesses the risk assessment of cardiovascular disease (CVD) in rheumatoid arthritis (RA) and how non-invasive imaging modalities may improve risk stratification in future. RA is common and patients are at greater risk of CVD than the general population. Cardiovascular (CV) risk stratification is recommended in European guidelines for patients at high and very high CV risk in order to commence preventative therapy. Ideally, such an assessment should be carried out immediately after diagnosis and as part of ongoing long-term patient care in order to improve patient outcomes...
November 28, 2016: Annals of the Rheumatic Diseases
https://www.readbyqxmd.com/read/27893402/a-convolutional-neural-network-for-automatic-characterization-of-plaque-composition-in-carotid-ultrasound
#14
Karim Lekadir, Alfiia Galimzianova, Angels Betriu, Maria Del Mar Vila, Laura Igual, Daniel Rubin, Elvira Fernandez, Petia Radeva, Sandy Napel
Characterization of carotid plaque composition, more specifically the amount of lipid core, fibrous tissue, and calcified tissue, is an important task for the identification of plaques that are prone to rupture, and thus for early risk estima-tion of cardiovascular and cerebrovascular events. Due to its low costs and wide availability, carotid ultrasound has the potential to become the modality of choice for plaque characterization in clinical practice. However, its significant image noise, coupled with the small size of the plaques and their complex appearance, makes it difficult for automated techniques to discriminate be-tween the different plaque constituents...
November 22, 2016: IEEE Journal of Biomedical and Health Informatics
https://www.readbyqxmd.com/read/27888153/three-dimensional-black-blood-t2-mapping-with-compressed-sensing-and-data-driven-parallel-imaging-in-the-carotid-artery
#15
Jianmin Yuan, Ammara Usman, Scott A Reid, Kevin F King, Andrew J Patterson, Jonathan H Gillard, Martin J Graves
PURPOSE: To develop a 3D black-blood T2 mapping sequence with a combination of compressed sensing (CS) and parallel imaging (PI) for carotid wall imaging. MATERIALS AND METHODS: A 3D black-blood fast-spin-echo (FSE) sequence for T2 mapping with CS and PI was developed and validated. Phantom experiments were performed to assess T2 accuracy using a Eurospin Test Object, with different combination of CS and PI acceleration factors. A 2D multi-echo FSE sequence was used as a reference to evaluate the accuracy...
November 22, 2016: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/27888087/coiling-of-a-ruptured-large-internal-carotid-aneurysm-via-extracranial-intracranial-saphenous-vein-bypass-graft-just-after-proximal-ligation-of-the-internal-carotid-artery
#16
Hayato Tajima, Yoshio Araki, Takashi Izumi, Masahiro Nishihori, Sho Okamoto, Toshihiko Wakabayashi
BACKGROUND: Direct and endovascular combined surgery has been performed to treat large to giant internal carotid artery (ICA) aneurysms. This report describes successful treatment of the large ICA aneurysm by coiling of the aneurysm via extracranial-intracranial (EC-IC) saphenous vein graft (SVG) just after bypass and ICA proximal ligation. CASE DESCRIPTION: A 66-year-old woman presented with left ICA supraclinoid aneurysm with progressive visual field defect and impaired visual acuity in the left eye...
November 22, 2016: World Neurosurgery
https://www.readbyqxmd.com/read/27887852/morphological-and-functional-imaging-of-neck-paragangliomas
#17
J-P Guichard, N Fakhry, J Franc, P Herman, C-A Righini, D Taieb
OBJECTIVE: To review the optimal techniques for localization and characterization of neck paragangliomas (PGL). MATERIAL AND METHODS: Systematic review of the literature from the PubMed/Medline database. RESULTS: Neck PGL are hypervascular tumours essentially arising from paraganglionic tissue situated at the carotid bifurcation (carotid body) and along the vagus nerve. Morphological and functional imaging are indicated to confirm the diagnosis, identify multifocal disease and for local and regional staging...
November 22, 2016: European Annals of Otorhinolaryngology, Head and Neck Diseases
https://www.readbyqxmd.com/read/27887791/cryptogenic-stroke-and-nonstenosing-intracranial-calcified-atherosclerosis
#18
Hooman Kamel, Gino Gialdini, Hediyeh Baradaran, Ashley E Giambrone, Babak B Navi, Michael P Lerario, James K Min, Costantino Iadecola, Ajay Gupta
OBJECTIVE: Because some cryptogenic strokes may result from large-artery atherosclerosis that goes unrecognized as it causes <50% luminal stenosis, we compared the prevalence of nonstenosing intracranial atherosclerotic plaques ipsilateral to cryptogenic cerebral infarcts versus the unaffected side using imaging biomarkers of calcium burden. METHODS: In a prospective stroke registry, we identified patients with cerebral infarction limited to the territory of one internal carotid artery (ICA)...
November 23, 2016: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/27887576/carotid-arterial-wall-inflammation-in-peripheral-artery-disease-is-augmented-by-type-2-diabetes-a-cross-sectional-study
#19
Sophie J Bernelot Moens, Robert M Stoekenbroek, Fleur M van der Valk, Simone L Verweij, Mark J W Koelemay, Hein J Verberne, Max Nieuwdorp, Erik S G Stroes
BACKGROUND: Patients with peripheral artery disease (PAD) are at increased risk of secondary events, which is exaggerated in the presence of type 2 diabetes mellitus. Diabetes is associated with a systemic pro-inflammatory state. We therefore investigated the cumulative impact of PAD and type 2 diabetes on carotid arterial wall inflammation. As recent data suggest a detrimental role of exogenous insulin on cardiovascular disease, we also included a group of insulin users. RESULTS: (18)F-fluorodeoxyglucose positron emission tomography with computed tomography ((18)F-FDG PET/CT) imaging showed increased carotid arterial wall inflammation, assessed as target-to-background ratio (TBR), in PAD patients without diabetes (PAD-only: n = 11, 1...
November 25, 2016: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/27886891/the-yield-of-diagnostic-imaging-in-patients-with-isolated-horner-syndrome
#20
REVIEW
Johanna D Beebe, Randy H Kardon, Matthew J Thurtell
We sought to determine, with a retrospective chart review, the imaging yield for patients with clinically isolated Horner syndrome. MRI/MRA of the head and neck extending from the supraorbital ridge to T4 with fat suppression and with postcontrast images was obtained. Of 88 patients with isolated Horner syndrome who were imaged, 20% had a causative etiology on imaging. The most common cause of an isolated Horner syndrome was a carotid artery dissection. There was 1 patient with a primary malignancy found to be the causative lesion in this group, and 1 patient with spread of their known metastatic disease...
February 2017: Neurologic Clinics
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