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https://www.readbyqxmd.com/read/29218656/multipath-curved-planar-reformations-of-peripheral-ct-angiography-diagnostic-accuracy-and-time-efficiency
#1
Markus M Schreiner, Hannes Platzgummer, Sylvia Unterhumer, Michael Weber, Gabriel Mistelbauer, Eduard Groeller, Christian Loewe, Ruediger E Schernthaner
OBJECTIVES: To compare diagnostic performance and time efficiency between 3D multipath curved planar reformations (mpCPRs) and axial images of CT angiography for the pre-interventional assessment of peripheral arterial disease (PAD), with digital subtraction angiography as the standard of reference. METHODS: Forty patients (10 females, mean age 72 years), referred to CTA prior to endovascular treatment of PAD, were prospectively included and underwent peripheral CT angiography...
December 7, 2017: Cardiovascular and Interventional Radiology
https://www.readbyqxmd.com/read/29218615/advanced-ct-for-diagnosis-of-seizure-related-stroke-mimics
#2
Friederike Austein, Monika Huhndorf, Johannes Meyne, Helmut Laufs, Olav Jansen, Thomas Lindner
BACKGROUND AND PURPOSE: It is assumed that up to 30 % of clinically diagnosed acute ischaemic strokes (AIS) are actually stroke mimics (SM). Our aim was to evaluate the usefulness of advanced CT including CT angiography (CTA) and CT perfusion (CTP) findings when distinguishing AIS from seizure-related SM. METHODS: Over a 22-month period data were gathered of patients who presented to our stroke centre with AIS-like symptoms and were examined immediately with an advanced CT, analysed and evaluated by two experienced neuroradiologists who preferred SM rather than AIS...
December 7, 2017: European Radiology
https://www.readbyqxmd.com/read/29217888/nutcracker-syndrome-with-hypertension-as-an-unusual-initial-presentation
#3
N A Narkhede, A B Deokar, K P Mehta, N N Kamat
Hypertension has been rarely reported in patients with the nutcracker phenomenon (NCP)/syndrome. We describe a case of a young adolescent female patient where a computed tomography angiography (CTA) provided evidence of left renal vein dilatation, probably due to its compression through the angle between the aorta and the superior mesenteric artery, during the evaluation of secondary hypertension. Blood levels of renin and aldosterone were within normal limits. Ultrasonography of the kidney showed minimal scarring on the left side...
November 2017: Indian Journal of Nephrology
https://www.readbyqxmd.com/read/29216952/-sepsis-induced-cardiomyopathy-complicated-with-cardiogenic-shock-patients-supported-with-extracorporeal-membrane-oxygenation
#4
Changzhi Liu, Ruiqiu Zhu, Zhujiang Zhou, Haifeng Liu, Jingcheng Lin, Shuchao Wen, Liuer Zuo
Sepsis-induced cardiomyopathy is a reversible myocardial dysfunction due to sepsis, which may be severe enough to complicate cardiogenic shock, and without effective drug and with high mortality during the acute phase. A case of sepsis-induced cardiomyopathy complicated with cardiogenic shock was treated in the intensive care unit (ICU) of Shunde Hospital Southern Medical University. A 37 years old female patient was admitted because she had suffered repeated fever for 5 days, chest tightness and abdominal pain for 3 days...
December 2017: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
https://www.readbyqxmd.com/read/29215892/molecular-dynamics-simulation-of-the-ph-induced-structural-transitions-in-ctab-nasal-solution
#5
Hui Yan, Zhe Han, Kaiming Li, Guangyong Li, Xilian Wei
We performed molecular dynamics simulations to study the pH-induced structural transitions for aqueous mixtures of a cationic surfactant (cetyltrimethylammonium bromide, CTAB) and a hydrotrope (sodium salicylate, NaSal). We obtained rigid cylindrical, spherical, and flexible cylindrical micelles at pH 7, 2, and 0, respectively, which agrees well with the experimental results of Umeasiegbu et al. (Langmuir 2016, 32, 655). With analyzing the different micellar structural properties, including distribution and molecular orientation of CTA+ and Sal- inside the micelle, we found the binding form of the protonated salicylate molecules with CTA+ is different from that of Sal- ions...
December 7, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29214780/mismatch-between-tof-mr-angiography-and-ct-angiography-of-the-middle-cerebral-artery-may-be-a-critical-sign-in-cerebrovascular-dynamics
#6
Keiji Igase, Michiya Igase, Ichiro Matsubara, Kazuhiko Sadamoto
PURPOSE: Although time-of-flight (TOF)-magnetic resonance angiography (MRA) can clearly depict intracranial arteries, the arterial flow of middle cerebral artery (MCA) is occasionally not detected. We evaluated this phenomenon with reference to cerebrovascular dynamics. MATERIALS AND METHODS: Seventeen patients with suspected occlusion of MCA or internal carotid artery on TOF-MRA were enrolled. All patients underwent CT angiography (CTA) and quantitative cerebral blood flow (CBF) examination for measurement of resting CBF and cerebrovascular reactivity (CVR)...
January 2018: Yonsei Medical Journal
https://www.readbyqxmd.com/read/29214402/decision-making-and-neurosurgeons-agreement-in-the-management-of-aneurysmal-subarachnoid-haemorrhage-based-on-computed-tomography-angiography
#7
Nicolai Maldaner, Jan-Karl Burkhardt, Martin Nikolaus Stienen, Johannes Goldberg, David Bervini, Philippe Bijlenga, Davide Croci, Daniel Zumofen, Donato D'Alonzo, Serge Marbacher, Rodolfo Maduri, Roy Thomas Daniel, Carlo Serra, Giuseppe Esposito, Marian C Neidert, Oliver Bozinov, Luca Regli
BACKGROUND: To determine the neurosurgeon's agreement in aneurysmal subarachnoid haemorrhage (aSAH) management with special emphasis on the rater's level of experience. A secondary aim was to analyse potential aneurysm variables associated with the therapeutic recommendation. METHOD: Basic clinical information and admission computed tomography angiography (CTA) images of 30 consecutive aSAH patients were provided. Twelve neurosurgeons independently evaluated aneurysm characteristics and gave recommendations regarding the emergency management and aneurysm occlusion therapy...
December 7, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/29211720/blazar-spectral-variability-as-explained-by-a-twisted-inhomogeneous-jet
#8
C M Raiteri, M Villata, J A Acosta-Pulido, I Agudo, A A Arkharov, R Bachev, G V Baida, E Benítez, G A Borman, W Boschin, V Bozhilov, M S Butuzova, P Calcidese, M I Carnerero, D Carosati, C Casadio, N Castro-Segura, W-P Chen, G Damljanovic, F D'Ammando, A Di Paola, J Echevarría, N V Efimova, Sh A Ehgamberdiev, C Espinosa, A Fuentes, A Giunta, J L Gómez, T S Grishina, M A Gurwell, D Hiriart, H Jermak, B Jordan, S G Jorstad, M Joshi, E N Kopatskaya, K Kuratov, O M Kurtanidze, S O Kurtanidze, A Lähteenmäki, V M Larionov, E G Larionova, L V Larionova, C Lázaro, C S Lin, M P Malmrose, A P Marscher, K Matsumoto, B McBreen, R Michel, B Mihov, M Minev, D O Mirzaqulov, A A Mokrushina, S N Molina, J W Moody, D A Morozova, S V Nazarov, M G Nikolashvili, J M Ohlert, D N Okhmat, E Ovcharov, F Pinna, T A Polakis, C Protasio, T Pursimo, F J Redondo-Lorenzo, N Rizzi, G Rodriguez-Coira, K Sadakane, A C Sadun, M R Samal, S S Savchenko, E Semkov, B A Skiff, L Slavcheva-Mihova, P S Smith, I A Steele, A Strigachev, J Tammi, C Thum, M Tornikoski, Yu V Troitskaya, I S Troitsky, A A Vasilyev, O Vince
Blazars are active galactic nuclei, which are powerful sources of radiation whose central engine is located in the core of the host galaxy. Blazar emission is dominated by non-thermal radiation from a jet that moves relativistically towards us, and therefore undergoes Doppler beaming. This beaming causes flux enhancement and contraction of the variability timescales, so that most blazars appear as luminous sources characterized by noticeable and fast changes in brightness at all frequencies. The mechanism that produces this unpredictable variability is under debate, but proposed mechanisms include injection, acceleration and cooling of particles, with possible intervention of shock waves or turbulence...
December 4, 2017: Nature
https://www.readbyqxmd.com/read/29208273/self-catalyzed-photo-initiated-raft-polymerization-for-fabrication-of-fluorescent-polymeric-nanoparticles-with-aggregation-induced-emission-feature
#9
Guangjian Zeng, Meiying Liu, Ruming Jiang, Qiang Huang, Long Huang, Qing Wan, Yanfeng Dai, Yuanqing Wen, Xiaoyong Zhang, Yen Wei
In recent years, the fluorescent polymeric nanoparticles (FPNs) with aggregation-induced emission (AIE) feature have been extensively exploited in various biomedical fields owing to their advantages, such as low toxicity, biodegradation, excellent biocompatibility, good designability and optical properties. Therefore, development of a facile, efficient and well designable strategy should be of great importance for the biomedical applications of these AIE-active FPNs. In this work, a novel method for the fabrication of AIE-active FPNs has been developed through the self-catalyzed photo-initiated reversible addition fragmentation chain transfer (RAFT) polymerization using an AIE dye containing chain transfer agent (CTA), which could initiate the RAFT polymerization under light irradiation...
February 1, 2018: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/29208189/enlightenment-and-lesson-from-the-successful-treatment-of-acute-superior-mesenteric-artery-embolism
#10
Bei Wang, Rongju Sun, Wei Chen, Tanshi Li
 Despite recent advances, treatment of acute superior mesenteric artery embolism (SMAE) in emergency is still very difficult. The comparative rarity, the difficulty of early diagnosis, and the extremely high mortality of SMAE give us the sufficient reasons to report our successful experience in curing a patient with acute SMAE. In the present case, the patient was diagnosed early without evidence of intestinal necrosis. The diagnosis of SMAE was verified by computed tomography angiography (CTA). A comprehensive treatment was immediately employed including a combination of intra-arterial thrombolysis and embolectomy operation with emergent laparotomy...
November 30, 2017: Cellular and Molecular Biology
https://www.readbyqxmd.com/read/29207672/thoracic-endovascular-aortic-repair-for-type-b-aortic-dissection-after-renal-transplantation
#11
Chang Shu, QingGen Xiong, Jian Qiu, MingYao Luo, Kun Fang
Thoracic endovascular repair (TEVAR) is an effective treatment for type B aortic dissection (TBAD). Here, we evaluated the early-midterm effectiveness and safety of TEVAR for treating TBAD patients after renal transplantation. Six patients with TBAD treated with TEVAR after renal transplantation were recruited between February 2012 and December 2016. They were then followed up with clinical examinations and computed tomography angiography (CTA). TEVAR was successfully performed in all patients (100%), and the primary tear sites were well covered by stents with or without coverage of the left subclavian artery...
October 31, 2017: Oncotarget
https://www.readbyqxmd.com/read/29204156/sp17-protein-expression-and-major-histocompatibility-class-i-and-ii-epitope-presentation-in-diffuse-large-b-cell-lymphoma-patients
#12
Kamel Ait-Tahar, Amanda P Anderson, Martin Barnardo, Graham P Collins, Chris S R Hatton, Alison H Banham, Karen Pulford
Improved therapies are urgently needed for patients with diffuse large B cell lymphoma (DLBCL). Success using immune checkpoint inhibitors and chimeric antigen receptor T cell technology has fuelled demand for validated cancer epitopes. Immunogenic cancer testis antigens (CTAs), with their widespread expression in many tumours but highly restricted normal tissue distribution, represent attractive immunotherapeutic targets that may improve treatment options for DLBCL and other malignancies. Sperm protein 17 (Sp17), a CTA reported to be immunogenic in ovarian cancer and myeloma patients, is expressed in DLBCL...
2017: Advances in Hematology
https://www.readbyqxmd.com/read/29201804/aneurysm-of-portosystemic-fistula-a-case-report-and-review-of-literature
#13
Sila Ulus, Gulhan Ertan Akan, Cengiz Erol
Aim: A case of asymptomatic aneurysm of spontaneous portosystemic venous fistula (SPVF) with the radiologic findings is described. Background: Although advances and more widespread use of ultrasound (US) and computed tomog -raphy angiography (CTA) have enabled more detection of SPVF in the liver, it is a rare entity. Case report: A 49-year-old male was referred to our hospital's nephrology outpatient clinic due to hypertension. Abdominal sonography examination detected a well-defined cystic lesion adjacent to the middle hepatic vein in the liver...
July 2017: Euroasian Journal of Hepato-Gastroenterology
https://www.readbyqxmd.com/read/29201581/contrast-enhancement-of-aneurysm-sac-post-pipeline-treatment-interpreted-as-recanalization
#14
Annie J Tsay, Sara Langan, Scott Simon
Multiple imaging modalities are available to evaluate aneurysms post-flow diverter (FD) placement. Though digital subtraction angiography (DSA) is the gold standard imaging modality post-FD placement, it is not perfect, and neither are other techniques, including contrast-enhanced magnetic resonance angiography (CE-MRA) and magnetic resonance imaging (MRI). We present a case of a 73-year-old woman with a right internal carotid artery (ICA) aneurysm treated with a pipeline embolization device (PED). Initial follow-up post-PED placement by three-dimensional time-of-flight (3D-TOF) MRA demonstrated aneurysm occlusion, which was confirmed by computed tomography angiography (CTA) and CE-MRA in subsequent follow-up appointments...
September 29, 2017: Curēus
https://www.readbyqxmd.com/read/29201292/factors-associated-with-the-risk-of-articular-surface-perforation-during-anchor-placement-for-arthroscopic-acetabular-labral-repair
#15
Jun-Il Yoo, Yong-Chan Ha, Sun-Chul Hwang, Jin-Young Oh, Eui-Chan Chang, Young-Kyun Lee, Kyung-Hoi Koo
Background: The purpose of this study was to evaluate factors associated with the risk of articular surface perforation during anchor placement for arthroscopic acetabular labral repair using follow-up computed tomographic arthrography (CTA). Methods: Forty-six patients (29 males and 17 females) underwent arthroscopic labral repair using 142 suture anchors (55 large anchors and 87 small anchors). The patients were followed with CTA 1 year postoperatively. Anchor position was assessed by the insertion angle and the distance of the suture anchor tip from the articular cartilage...
December 2017: Clinics in Orthopedic Surgery
https://www.readbyqxmd.com/read/29198593/a-new-generation-of-cellulose-triacetate-suitable-for-online-haemodiafiltration
#16
Francisco Maduell, Raquel Ojeda, Marta Arias-Guillén, Néstor Fontseré, Manel Vera, Lida Rodas, Miquel Gómez, Karen P Huablocho, Fanny Esquivel, Paola D Mori, Valentina Hoffmann, Jessica Ugalde, Nayra Rico
BACKGROUND: Online haemodiafiltration (OL-HDF) is currently the most effective dialysis technique that also improves survival. To date, high permeability membranes with low albumin loss, such as polysulfone, polyamide and polyacrylonitrile membranes have been the most widely used. However, the initially restricted use of cellulose triacetate (CTA) membranes in OL-HDF has expanded. The aim of the study was to ascertain whether the latest generation asymmetric CTA membranes are more effective in obtaining high convective transport...
November 29, 2017: Nefrología: Publicación Oficial de la Sociedad Española Nefrologia
https://www.readbyqxmd.com/read/29195843/influence-of-irregular-heart-rhythm-on-radiation-exposure-image-quality-and-diagnostic-impact-of-cardiac-computed-tomography-angiography-in-4-339-patients-data-from-the-german-cardiac-computed-tomography-registry
#17
Grigorios Korosoglou, Mohamed Marwan, Sorin Giusca, Axel Schmermund, Steffen Schneider, Oliver Bruder, Jörg Hausleiter, Stephen Schroeder, Alexander Leber, Tobias Limbourg, Gitsios Gitsioudis, Johannes Rixe, Ralf Zahn, Hugo A Katus, Stephan Achenbach, Jochen Senges
BACKGROUND: Coronary computed tomography angiography (coronary CTA) provides non-invasive evaluation of the coronary arteries with high precision for the detection of significant coronary artery disease (CAD). AIM: To investigate whether irregular heart rhythm including atrial fibrillation and premature beats during data acquisition influences (i) radiation and contrast media exposure, (ii) number of non-evaluable coronary segments and (iii) diagnostic impact of coronary CTA...
November 21, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/29195841/incidental-pulmonary-nodules-in-emergent-coronary-ct-angiography-for-suspected-acute-coronary-syndrome-impact-of-revised-2017-fleischner-society-guidelines
#18
Jan-Erik Scholtz, Michael T Lu, Sandeep Hedgire, Nina M Meyersohn, George R Oliveira, Anand M Prabhakar, Rajiv Gupta, Mannudeep K Kalra, Jo-Anne O Shepard, Udo Hoffmann, Brian B Ghoshhajra
BACKGROUND: Pulmonary nodules (PN) are frequently detected incidentally during coronary computed tomography angiography (CTA). We evaluated whether the 2017 Fleischner Society guidelines may result in a decrease of follow-up testing of incidental PN as compared to prior guidelines in patients undergoing coronary CTA. METHODS: We conducted a retrospective study of a registry of emergency department patients who underwent coronary CTA for acute coronary syndrome assessment between 2012 and 2017...
November 14, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/29192876/posterior-inferior-cerebellar-artery-with-an-extradural-origin-from-the-v3-segment-higher-incidence-on-the-nondominant-vertebral-artery
#19
Taiki Isaji, Muneyoshi Yasuda, Reo Kawaguchi, Masahiro Aoyama, Aichi Niwa, Takahiro Nakura, Naoki Matsuo, Masakazu Takayasu
OBJECTIVE The posterior inferior cerebellar artery (PICA) and the vertebral artery (VA) often exhibit anatomical variations at the craniovertebral junction (CVJ). An example of this is the PICA originating extradurally from the V3 segment of the VA. To date, some cadaveric investigations have been reported, but the incidence and relationship of this variation to the VA and the atlas as observed on clinical imaging have not been discussed. This study evaluated the prevalence of PICAs originating from the V3 on CT scanning...
December 1, 2017: Journal of Neurosurgery. Spine
https://www.readbyqxmd.com/read/29191542/self-inflicted-dry-wall-screws-in-the-sagittal-sinus
#20
Kern H Guppy, Calvin Ochi
A 30-year-old right hand male with a history of schizophrenia presented with two self-inflicted drywall screws in the skull. The patient was sleepy but easily arousable with blood tests showing he had taken methamphetamines. Computed Tomography (CT) and Computed Tomography angiography (CTA) of the head showed the frontal screw abutted left of the superior sagittal sinus while the posterior screw went through the superior sagittal sinus with no extravasation of contrast at either site. Both screws were removed with exposure of the sagittal sinus using "U" shape craniectomies...
November 27, 2017: World Neurosurgery
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