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Conebeam OR dynaCT OR rotational angiogram

Jesus Peteiro, Alberto Bouzas-Mosquera, Javier Broullon, Gabriel Sanchez-Fernandez, Cayetana Barbeito, Lucia Perez-Cebey, Dolores Martinez, Jose M Vazquez-Rodriguez
LV torsion during exercise in patients with coronary artery disease (CAD) is not well known. Circumferential strain (CS) and left ventricular (LV) torsion (Tor) have not been evaluated during ischemia in these patients. We aimed to assess the effect of ischemia during exercise echocardiography (ExE) on CS and Tor. We studied a group of 73 patients with true positive ExE results (Ischemic group: ischemia plus an abnormal coronary angiogram) and a matched control group of 66 patients with negative ExE and either normal coronary angiography or low post-test probability of CAD...
September 19, 2016: International Journal of Cardiovascular Imaging
H G Morales, O Bonnefous, A J Geers, O Brina, V M Pereira, L Spelle, J Moret, I Larrabide
BACKGROUND AND PURPOSE: Our aim was to assess the performance of flow-diverter stents. The pre- and end-of-treatment angiographies are commonly compared. However, the arterial flow rate may change between acquisitions; therefore, a better understanding of its influence on the local intra-aneurysmal hemodynamics before and after flow-diverter stent use is required. MATERIALS AND METHODS: Twenty-five image-based aneurysm models extracted from 3D rotational angiograms were conditioned for computational fluid dynamics simulations...
September 15, 2016: AJNR. American Journal of Neuroradiology
Lukas Andereggen, Jan Gralla, Robert H Andres, Stefan Weber, Gerhard Schroth, Jürgen Beck, Hans Rudolf Widmer, Michael Reinert, Andreas Raabe, Matthias Peterhans
BACKGROUND: Treatment of complex intracranial aneurysms requires strategic pre-interventional or preoperative planning. In addition to modern three-dimensional (3D) rotational angiography, computed tomography angiography (CTA) or magnetic resonance angiogram (MRA), a solid, tangible 3D model may improve anatomical comprehension and treatment planning. A 3D rapid prototyping (RP) technique based on multimodal imaging data was evaluated for use in planning of treatment for complex aneurysmal configurations...
September 2016: Acta Neurochirurgica
Céline Vetter, Elizabeth E Devore, Lani R Wegrzyn, Jennifer Massa, Frank E Speizer, Ichiro Kawachi, Bernard Rosner, Meir J Stampfer, Eva S Schernhammer
IMPORTANCE: Prospective studies linking shift work to coronary heart disease (CHD) have been inconsistent and limited by short follow-up. OBJECTIVE: To determine whether rotating night shift work is associated with CHD risk. DESIGN, SETTING, AND PARTICIPANTS: Prospective cohort study of 189,158 initially healthy women followed up over 24 years in the Nurses' Health Studies (NHS [1988-2012]: N = 73,623 and NHS2 [1989-2013]: N = 115,535)...
April 26, 2016: JAMA: the Journal of the American Medical Association
Lauren Haddad, B Rush Waller, Jason Johnson, Asim Choudhri, Vera McGhee, David Zurakowski, Andrew Kuhls-Gilcrist, Shyam Sathanandam
BACKGROUND: Three-dimensional rotational angiography (3DRA) offers more detailed anatomic information than 2D digital acquisition (2DDA). Concerns over potentially higher contrast and radiation doses have limited its routine use. OBJECTIVE: The primary objective of this study was to compare radiation doses required to obtain 3DRA using a customized low dose radiation protocol with 2DDA. The secondary objective was to compare total procedural radiation in pediatric cardiac catheterization procedures utilizing 3DRA to those that do not...
December 2016: Congenital Heart Disease
Marco Boegel, Sonja Gehrisch, Thomas Redel, Christopher Rohkohl, Philip Hoelter, Arnd Doerfler, Andreas Maier, Markus Kowarschik
PURPOSE: Hemodynamic simulations are of increasing interest for the assessment of aneurysmal rupture risk and treatment planning. Achievement of accurate simulation results requires the usage of several patient-individual boundary conditions, such as a geometric model of the vasculature but also individualized inflow conditions. METHODS: We propose the automatic estimation of various parameters for boundary conditions for computational fluid dynamics (CFD) based on a single 3D rotational angiography scan, also showing contrast agent inflow...
June 2016: International Journal of Computer Assisted Radiology and Surgery
Ali Jalali, Visish M Srinivasan, Ponraj Chinnadurai, Peter Kan, Adam Arthur, Edward A M Duckworth
BACKGROUND: Since its introduction, digital subtraction angiography has been considered the gold standard in diagnostic imaging for neurovascular disease. Modern post-processing techniques have made angiography even more informative to the cerebrovascular neurosurgeon or neurointerventionalist. Open neurosurgical procedures such as aneurysm clipping, extirpation of arteriovenous malformations, and extracranial-intracranial bypass remain important techniques in the armamentarium of a comprehensive cerebrovascular neurosurgeon...
October 2016: Journal of Neurointerventional Surgery
Santhosh Kannath, Enakshy Rajan Jayadevan
BACKGROUND: Medullary-bridging vein dural arteriovenous fistula (DAVF) is an uncommon type of DAVF with an aggressive clinical course due to direct fistulous shunting into medullary and brainstem veins. Important considerations need to be given to retrograde embolic migration or perforator involvement while treating these fistulas endovascularly with a liquid embolic agent. We report a lateral spinal artery feeding the DAVF, the recognition of which is important to avoid potential catastrophic complications during definitive therapy, and which has not been described before...
October 27, 2015: Neurosurgery
Pontus Olsson, Fredrik Nysjö, Andrés Rodríguez-Lorenzo, Andreas Thor, Jan-Michaél Hirsch, Ingrid B Carlbom
UNLABELLED: Virtual surgery planning has proven useful for reconstructing head and neck defects by fibula osteocutaneous free flaps (FOFF). Benefits include improved healing, function, and aesthetics, as well as cost savings. But available virtual surgery planning systems incorporating fibula in craniomaxillofacial reconstruction simulate only bone reconstruction without considering vessels and soft tissue. METHODS: The Haptics-Assisted Surgery Planning (HASP) system incorporates bone, vessels, and soft tissue of the FOFF in craniomaxillofacial defect reconstruction...
August 2015: Plastic and Reconstructive Surgery. Global Open
Ha Son Nguyen, Ninh Doan, Gerald Eckardt, Glen Pollock
BACKGROUND: Bow hunter's syndrome, also known as rotational vertebrobasilar insufficiency, arises from mechanical compression of the vertebral artery during the neck rotation. Surgical options have been the mainstay treatment of choice. Postoperative imaging is typically used to assess adequate decompression. On the other hand, intraoperative assessment of decompression has been rarely reported. CASE DESCRIPTION: A 52-year-old male began to see "black spots," and experienced presyncope whenever he rotated his head toward the right...
2015: Surgical Neurology International
Pengfei Yang, Sebastian Schafer, Kevin Royalty, Azam Ahmed, David Niemann, Charles Strother
BACKGROUND: Accurate vessel size measurement is important for neurointervention. Modern angiographic equipment offers various two-dimensional (2D) and 3D measurement methods that have not been systematically evaluated for accuracy and reliability. OBJECTIVE: To evaluate these methods using anthropomorphic vessel phantoms. MATERIALS AND METHODS: Tubing of known sizes (2-5 mm, 1 mm increments) was embedded in 3D-printed skulls to simulate the middle cerebral artery, internal carotid artery, and basilar artery...
September 2016: Journal of Neurointerventional Surgery
Ponraj Chinnadurai, Cassidy Duran, Odeaa Al-Jabbari, Walid K Abu Saleh, Alan Lumsden, Jean Bismuth
BACKGROUND: To report our initial experience and highlight the value of using intraoperative C-arm cone beam computed tomography (CT; DynaCT(®)) image fusion guidance along with steerable robotic endovascular catheter navigation to optimize vessel cannulation. METHODS: Between May 2013 and January 2015, all patients who underwent endovascular procedures using DynaCT image fusion technique along with Hansen Magellan vascular robotic catheter were included in this study...
January 2016: Annals of Vascular Surgery
Jayesh Sardhara, Sanjay Behari, B Madan Mohan, Awadhesh K Jaiswal, Rabi N Sahu, Arun Srivastava, Anant Mehrotra, Hira Lal
CONTEXT: Variability in dimensions and course of vertebral artery (VA) makes it vulnerable to injury during surgery for congenital atlanto-axial dislocation (AAD) with or without an occipitalized atlas. AIMS: This prospective study attempts to define anatomical variations that render VA at the craniovertebral junction (CVJ) vulnerable to injury during transoral decompression and posterior stabilization procedures; and, to propose a classification that helps in preoperative risk stratification...
May 2015: Neurology India
Anna L Hoppe, Madhavan L Raghavan, David M Hasan
BACKGROUND AND PURPOSE: In recurrent cerebral aneurysms treated by coil embolization, coil compaction is regarded as the presumptive mechanism. We test the hypothesis that aneurysm growth is the primary recurrence mechanism. We also test the hypothesis that the coil mass will translate a measurable extent when recurrence occurs. METHODS: An objective, quantitative image analysis protocol was developed to determine the volumes of aneurysms and coil masses during initial and follow-up visits from 3D rotational angiograms...
2015: PloS One
Katsunari Namba, Ayuho Higaki, Naoki Kaneko, Toshihiro Mashiko, Shigeru Nemoto, Eiju Watanabe
OBJECTIVE: An optimal microcatheter is necessary for successful coiling of an intracranial aneurysm. The optimal shape may be predetermined before the endovascular surgery via the use of a 3-dimensional (3D) printing rapid prototyping technology. We report a preliminary series of intracranial aneurysms treated with a microcatheter shape determined by the patient's anatomy and configuration of the aneurysm, which was fabricated with a 3D printer aneurysm model. METHODS: A solid aneurysm model was fabricated with a 3D printer based on the data acquired from the 3D rotational angiogram...
July 2015: World Neurosurgery
Thomas Westermaier, Thomas Linsenmann, Almuth F Keßler, Christian Stetter, Nadine Willner, Laszlo Solymosi, Ralf-Ingo Ernestus, Giles H Vince
BACKGROUND: Intraoperative imaging of cerebral aneurysms may be desirable in emergency situations with large space-occupying hematomas or to visualize vessels after clip placement. Mobile 3-dimensional fluoroscopes are available in a number of neurosurgical departments and may be useful in combination with simple image postprocessing to depict cerebral vessels. OBJECTIVE: To assess whether intracranial aneurysms are detectable with appropriate image quality with intraoperative 3-dimensional fluoroscopy with intravenous contrast administration...
March 2015: Neurosurgery
Thomas W Leung, Lily Wang, Yannie O Y Soo, Vincent H L Ip, Anne Y Y Chan, Lisa W C Au, Florence S Y Fan, Alex Y L Lau, Howan Leung, Jill Abrigo, Adrian Wong, Vincent C T Mok, Ping Wing Ng, Tak Hong Tsoi, Siu Hung Li, Celeste B L Man, Wing Chi Fong, Ka Sing Wong, Simon C H Yu
OBJECTIVE: Understanding how symptomatic intracranial atherosclerotic disease (ICAD) evolves with current medical therapy may inform secondary stroke prevention. METHODS: In a prospective academic-initiated study, we recruited 50 patients (mean age = 63.4 ± 9.0 years) with acute strokes attributed to high-grade (≥70%) intracranial atherosclerotic stenosis for 3-dimensional rotational angiograms before and after intensive medical therapy for 12 months...
March 2015: Annals of Neurology
Mohammad Ebrahim, James Hagood, John Moore, Howaida El-Said
OBJECTIVE: Bronchial compression as a result of pulmonary artery and aortic arch stenting may cause significant respiratory distress. We set out to limit airway narrowing by endovascular stenting, by using simultaneous flexible bronchoscopy and graduated balloon stent dilatation, or balloon angioplasty to determine maximum safe stent diameter. METHODS: Between August 2010 and August 2013, patients with suspected airway compression by adjacent vascular structures, underwent CT or a 3D rotational angiogram to evaluate the relationship between the airway and the blood vessels...
April 2015: Catheterization and Cardiovascular Interventions
Zi-Fu Li, Bo Hong, Yi Xv, Qing-Hai Huang, Wen-Yuan Zhao, Jian-Min Liu
OBJECTIVE: Preoperative comprehension of the complex angioarchitecture and intraoperative complication detection are essential in endovascular treatment and surgical planning for spinal vascular diseases. We aimed to illustrate the application of DynaCT rotational angiography for the treatment of such diseases. METHODS: We retrospectively analyzed the medical records of 23 patients with spinal vascular disease who underwent DynaCT and three-dimensional (3D) rotational angiography between January 2012 and December 2013...
January 2015: Clinical Neurology and Neurosurgery
Yong Sun, Jun Jiang, Guozhong Zhu, Changling Li, Liang Dong, Xianbao Liu, Liang Lyu, Xinyang Hu, Meixiang Xiang, Jian'an Wang
OBJECTIVE: To evaluate the efficacy of intravascular ultrasound guided tranradial rotational atherectomy (RA) followed by drug eluting stent (DES) implantation in treating patients with heavily calcified coronary lesions. METHODS: Clinical characteristics, coronary angiogram, intravascular ultrasound images, peri-procedure and follow-up data (including death , myocardial infarction and target lesion revascularization) of 44 patients treated with RA and DES implantation under the guidance of IVUS in our department from March 2011 to March 2013 were retrospectively analyzed...
July 2014: Zhonghua Xin Xue Guan Bing za Zhi
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