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https://www.readbyqxmd.com/read/29455293/variations-of-transverse-foramina-in-cervical-vertebrae-what-happens-to-the-vertebral-artery
#1
Aristeidis Zibis, Vasileios Mitrousias, Nikolaos Galanakis, Nikoletta Chalampalaki, Dimitrios Arvanitis, Apostolos Karantanas
PURPOSE: The purpose of this study is to examine variations of the foramen transversarium and the vertebral artery in computed tomography angiographies (CTa) of the cervical spine, investigate their coexistence, and present possible considerations regarding such variations in spine surgical procedures. METHODS: Fifty CTa of the neck were retrospectively reviewed. Transverse and anteroposterior diameter of the foramen and diameter of the vertebral artery were measured...
February 17, 2018: European Spine Journal
https://www.readbyqxmd.com/read/29454774/incremental-diagnostic-value-of-stress-computed-tomography-myocardial-perfusion-with-whole-heart-coverage-ct-scanner-in-intermediate-to-high-risk-symptomatic-patients-suspected-of-coronary-artery-disease
#2
Gianluca Pontone, Daniele Andreini, Andrea I Guaricci, Andrea Baggiano, Fabio Fazzari, Marco Guglielmo, Giuseppe Muscogiuri, Claudio Maria Berzovini, Annalisa Pasquini, Saima Mushtaq, Edoardo Conte, Giuseppe Calligaris, Stefano De Martini, Cristina Ferrari, Stefano Galli, Luca Grancini, Paolo Ravagnani, Giovanni Teruzzi, Daniela Trabattoni, Franco Fabbiocchi, Alessandro Lualdi, Piero Montorsi, Mark G Rabbat, Antonio L Bartorelli, Mauro Pepi
OBJECTIVES: The goal of this study was to evaluate the diagnostic accuracy of stress computed tomography myocardial perfusion (CTP) for the detection of functionally significant coronary artery disease (CAD) by using invasive coronary angiography (ICA) plus invasive fractional flow reserve (FFR) as the reference standard in consecutive intermediate- to high-risk symptomatic patients. BACKGROUND: Stress CTP recently emerged as a potential strategy to combine the anatomic and functional evaluation of CAD in a single scan...
February 9, 2018: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29453592/patient-specific-registration-of-3d-ct-angiography-cta-with-x-ray-fluoroscopy-for-image-fusion-during-transcatheter-aortic-valve-implantation-tavi-increases-performance-of-the-procedure
#3
I Vernikouskaya, W Rottbauer, J Seeger, B Gonska, V Rasche, Jochen Wöhrle
OBJECTIVES: The aim of this study was to adapt patient-specifically a co-registration procedure for image fusion (IF) of a pre-interventional CT dataset with real-time X-ray (XR) fluoroscopy during transfemoral transcatheter aortic valve implantation (TAVI), enabling improved performance of the procedure. BACKGROUND: The ability to use 3D models of the respective anatomies to complement the anatomic information obtained by XR fluoroscopy and provide a greater degree of real-time anatomical guidance holds great potential for complex cardiac interventions, especially for TAVI procedures with cerebral protection...
February 16, 2018: Clinical Research in Cardiology: Official Journal of the German Cardiac Society
https://www.readbyqxmd.com/read/29450741/utility-of-cardiac-computed-tomography-scanning-in-the-diagnosis-and-pre-operative-evaluation-of-patients-with-infective-endocarditis
#4
Jason R Sims, Nandan S Anavekar, Krishnaswamy Chandrasekaran, James M Steckelberg, Walter R Wilson, Bernard J Gersh, Larry M Baddour, Daniel C DeSimone
Transesophageal echocardiography (TEE) is the gold standard imaging study used in the diagnosis of infective endocarditis (IE). Computed tomography angiography (CTA) has undergone rapid advancement as a cardiac imaging technique and has previously shown promise in small non-randomized studies for evaluation of IE. We hypothesized that cardiac CTA would perform similarly to TEE in the detection of endocarditic lesions and that there would be no difference in clinical outcomes whether the coronary arteries were evaluated by CTA or invasive coronary angiography (ICA)...
February 15, 2018: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/29449282/a-patient-dose-reduction-technique-for-neuroendovascular-image-guided-interventions-image-quality-comparison-study
#5
A Sonig, S V Setlur Nagesh, V S Fennell, S Gandhi, L Rangel-Castilla, C N Ionita, K V Snyder, L N Hopkins, D R Bednarek, S Rudin, A H Siddiqui, E I Levy
BACKGROUND AND PURPOSE: The ROI-dose-reduced intervention technique represents an extension of ROI fluoroscopy combining x-ray entrance skin dose reduction with spatially different recursive temporal filtering to reduce excessive image noise in the dose-reduced periphery in real-time. The aim of our study was to compare the image quality of simulated neurointerventions with regular and reduced radiation doses using a standard flat panel detector system. MATERIALS AND METHODS: Ten 3D-printed intracranial aneurysm models were generated on the basis of a single patient vasculature derived from intracranial DSA and CTA...
February 15, 2018: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29449280/prediction-of-the-multisegment-clot-sign-on-dynamic-ct-angiography-of-cardioembolic-stroke
#6
Z Chen, F Shi, M Zhang, X Gong, L Lin, M Lou
BACKGROUND AND PURPOSE: The multisegment clot sign has been observed at the site of large-artery occlusion in patients with acute ischemic stroke. This study aimed to assess its occurrence rate and relationship with stroke etiologies in patients with acute intracranial large-artery occlusion. MATERIALS AND METHODS: We included consecutive patients with acute ischemic stroke who had acute intracranial large-artery occlusion and underwent perfusion CT within 8 hours after stroke onset...
February 15, 2018: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29445607/comprehensive-evaluation-of-liver-resection-procedures-surgical-mind-development-through-cognitive-task-analysis
#7
Cheng-Maw Ho, Go Wakabayashi, Chi-Chuan Yeh, Rey-Heng Hu, Takanori Sakaguchi, Yasushi Hasegawa, Takeshi Takahara, Hiroyuki Nitta, Akira Sasaki, Po-Huang Lee
Background: Liver resection is a complex procedure for trainee surgeons. Cognitive task analysis (CTA) facilitates understanding and decomposing tasks that require a great proportion of mental activity from experts. Methods: Using CTA and video-based coaching to compare liver resection by open and laparoscopic approaches, we decomposed the task of liver resection into exposure (visual field building), adequate tension made at the working plane (which may change three-dimensionally during the resection process), and target processing (intervention strategy) that can bridge the gap from the basic surgical principle...
2018: Journal of Visualized Surgery
https://www.readbyqxmd.com/read/29439905/three-dimensional-intracranial-middle-cerebral-artery-aneurysm-models-for-aneurysm-surgery-and-training
#8
Liang Wang, Xun Ye, Qiang Hao, Li Ma, Xiaolin Chen, Hao Wang, Yuanli Zhao
To develop a realistic model of middle cerebral artery (MCA) aneurysms using three-dimensional (3D) printing for surgical planning, research, and training of neurosurgical residents. This study included eight MCA aneurysm cases. The aneurysm together with the adjacent arteries and skull base were printed based on raw computed tomography angiography (CTA) data using a 3D printer with acrylonitrile-butadiene-styrene as the model material. The aneurysm models were used for surgical planning, and craniotomy and clipping practice by neurosurgical residents...
February 10, 2018: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/29438036/cervical-ica-pseudo-occlusion-on-single-phase-cta-in-patients-with-acute-terminal-ica-occlusion-what-is-the-mechanism-and-can-delayed-cta-aid-diagnosis
#9
James Wareham, Robert Crossley, Sarah Barr, Alex Mortimer
BACKGROUND: Single-phase CT angiography (CTA) forms the basis of hyperacute stroke imaging but many patients with terminal internal carotid artery (ICA) occlusion exhibit a pseudo-occlusion of the cervical ICA whereby a column of unopacified blood mimics a tandem cervical ICA lesion. We aimed to investigate the utility of a delayed phase acquisition to aid identification of a pseudo-occlusion and investigated the mechanism for this imaging artefact. METHODS: Thirteen patients with a pseudo-occlusion were compared with 13 patients without...
February 6, 2018: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/29434687/is-fetal-type-posterior-cerebral-artery-a-risk-factor-for-intracranial-aneurysm-as-analyzed-by-multislice-ct-angiography
#10
Zhen He, Yeda Wan
Fetal-type posterior cerebral artery (FTP) is a common anatomic variation that is closely associated with intracranial aneurysm. In the present study, multislice computed tomography angiography (CTA) was performed to assess whether FTP is a risk factor for intracranial aneurysm. CTA data of 364 consecutive cases of patients who were suspected with cerebrovascular disease or intracranial aneurysm of intracranial artery from 2013 to 2016 were reviewed and the incidence rates of FTP, other variations of the circle of Willis, intracranial aneurysm and FTP with intracranial aneurysm were evaluated...
January 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29433968/dynamic-stress-computed-tomography-myocardial-perfusion-for-detecting-myocardial-ischemia-a-systematic-review-and-meta-analysis
#11
Minjie Lu, Shuli Wang, Arlene Sirajuddin, Andrew E Arai, Shihua Zhao
BACKGROUND: Comparing to SPECT and MRI, with higher temporal and spatial resolution and development of radiation dose reduction, myocardial computed tomography perfusion has emerged as a potential method for evaluation of hemodynamic myocardial ischemia. This meta-analysis systematically analyzed the performance of dynamic CT myocardial perfusion (DCTMP) to diagnose myocardial ischemia (MI) with clinically established reference methods [MR/SPECT/PET perfusion and fractional flow reserve (FFR)] as the reference standard...
February 10, 2018: International Journal of Cardiology
https://www.readbyqxmd.com/read/29431395/years-clinical-decision-tool-decreases-cta-in-patients-with-suspected-pulmonary-embolism
#12
Henry C Barry
No abstract text is available yet for this article.
November 15, 2017: American Family Physician
https://www.readbyqxmd.com/read/29430936/tailored-ct-angiography-in-follow-up-after-endovascular-aneurysm-repair-evar-combined-dose-reduction-techniques
#13
Georg Böning, Roman A Rotzinger, Johannes F Kahn, Patrick Freyhardt, Diane M Renz, Martin Maurer, Florian Streitparth
Background Endovascular aneurysm repair (EVAR) requires lifelong surveillance by computed tomography angiography (CTA). This is attended by a substantial accumulation of radiation exposure. Iterative reconstruction (IR) has been introduced to approach dose reduction. Purpose To evaluate adaptive statistical iterative reconstruction (ASIR) at different levels of tube voltage concerning image quality and dose reduction potential in follow-up post EVAR. Material and Methods One hundred CTAs in 67 patients with EVAR were examined using five protocols: protocol A (n = 40) as biphasic standard using filtered back projection (FBP) at 120 kV; protocols B (n = 40), C (n = 10), and D1 (n = 5) biphasic using ASIR at 120, 100, and 80 kV, respectively; and protocol D2 (n = 5) with a monophasic splitbolus ASIR protocol at 80 kV...
January 1, 2018: Acta Radiologica
https://www.readbyqxmd.com/read/29426964/incidental-pulmonary-embolism-in-suspected-stroke-patients-undergoing-carotid-ct-angiography
#14
Guang-Liang Chen, Dong-Hui Shen, Jin Wei, Hua Wang, Yuan-Fen Liu, Qing Duan
PURPOSE: The purpose of this study was to investigate the prevalence of incidental pulmonary embolism (IPE) in suspected stroke patients receiving carotid computed tomography angiography (CTA) and its characteristics. MATERIALS AND METHODS: A total of 4873 cases receiving carotid CTA between January 2013 and December 2016 were retrospectively reassessed by one radiologist. Patients with previous or suspected PE were excluded. The remaining prior contrast-enhanced carotid CTA studies were regarded as a "potentially incidental" IPE when a filling defect was found in one or more pulmonary arteries and subjected to the other two thoracic radiologists independently for reviewing and assessing for characteristics of the IPE and the image quality of the PE...
February 9, 2018: La Radiologia Medica
https://www.readbyqxmd.com/read/29422416/incidence-and-predictors-of-lesion-specific-ischemia-by-ffrct-learnings-from-the-international-advance-registry
#15
Hironori Kitabata, Jonathon Leipsic, Manesh R Patel, Koen Nieman, Bernard De Bruyne, Campbell Rogers, Gianluca Pontone, Bjarne L Nørgaard, Jeroen J Bax, Gilbert Raff, Kavitha M Chinnaiyan, Mark Rabbat, Niels Peter Rønnow Sand, Philipp Blanke, Timothy A Fairbairn, Hitoshi Matsuo, Tetsuya Amano, Tomohiro Kawasaki, Yoshihiro Morino, Takashi Akasaka
BACKGROUND: To date, the clinical utility of coronary computed tomography angiography (CTA)-derived fractional flow reserve (FFRCT) has been limited to trials and single center experiences. We herein report the incidence of abnormal FFRCT (≤0.80) and the relationship of lesion-specific ischemia to subject demographics, symptoms, and degree of stenosis in the multicenter, prospective ADVANCE registry. METHODS: One thousand patients with suspected angina having documented coronary artery disease on coronary CTA and clinically referred for FFRCT were prospectively enrolled in the registry...
February 2, 2018: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/29417173/cta-v-detection-of-bilateral-sigmoid-sinus-dehiscence-and-suspected-idiopathic-intracranial-hypertension-in-unilateral-pulsatile-tinnitus
#16
Shuaishuai Xu, Shidong Ruan, Shanfeng Liu, Jianrong Xu, Ruozhen Gong
PURPOSE: This aimed to evaluate the prevalence and extent of bilateral sigmoid sinus dehiscence (SSD) and to explore the presence of idiopathic intracranial hypertension (IIH) in patients with unilateral pulsatile tinnitus (PT) with CTA/V. METHODS: Sixty PT patients (52 females; 40.4 ± 11.6 years [20-72]) who underwent CTA/V and 30 non-PT patients (27 females; 38.4 ± 14.7 years [12-62]) were enrolled in this study. The primary outcome measure was the radiographic presence of SSD...
February 7, 2018: Neuroradiology
https://www.readbyqxmd.com/read/29416344/incidence-of-traumatic-carotid-and-vertebral-artery-dissections-results-of-cervical-vessel-computed-tomography-angiogram-as-a-mandatory-scan-component-in-severely-injured-patients
#17
Andreas Schicho, Lukas Luerken, Ramona Meier, Antonio Ernstberger, Christian Stroszczynski, Andreas Schreyer, Lena-Marie Dendl, Stephan Schleder
Purpose: The aim of this study was to evaluate the true incidence of cervical artery dissections (CeADs) in trauma patients with an Injury Severity Score (ISS) of ≥16, since head-and-neck computed tomography angiogram (CTA) is not a compulsory component of whole-body trauma computed tomography (CT) protocols. Patients and methods: A total of 230 consecutive trauma patients with an ISS of ≥16 admitted to our Level I trauma center during a 24-month period were prospectively included...
2018: Therapeutics and Clinical Risk Management
https://www.readbyqxmd.com/read/29414151/migrainous-aura-as-stroke-mimic-the-role-of-perfusion-computed-tomography
#18
Mariana Ridolfi, Antonio Granato, Paola Polverino, Giovanni Furlanis, Maja Ukmar, Irene Zorzenon, Paolo Manganotti
OBJECTIVES: The acute-onset of migrainuos aura (MA) can be erroneously diagnosed in Emergency Department (ED) as acute stroke (AS) and it can be classified as "stroke mimic" (SM). Perfusion computer tomography (PCT) may be useful to improve detection of infarcts. The aim of the study was to investigate the role in ED of PCT in improving diagnosis of migrainous aura. Data were compared with the well-defined perfusion patterns in patients with acute ischemic stroke. PATIENTS AND METHODS: A standardized Stroke Protocol was planned...
January 31, 2018: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/29412008/subtraction-ct-angiography-in-head-and-neck-with-low-radiation-and-contrast-dose-dual-energy-spectral-ct-using-rapid-kv-switching-technique
#19
Guangming Ma, Yong Yu, Haifeng Duan, Yuequn Dou, Yongjun Jia, Xirong Zhang, Chuangbo Yang, Xiaoxia Chen, Dong Han, Changyi Guo, Taiping He
OBJECTIVE: To investigate the application of low radiation and contrast dose Spectral CT angiology (CTA) using rapid kV-switching technique in the head and neck with subtraction method for bone removal. METHODS: This prospective study was approved by the local ethics committee. 64 cases for head and neck CTA were randomly divided into groups A (n=32) and B (n=32). Group A underwent unenhanced CT with 100kVp, 200mA and contrast-enhanced CT with Spectral CT mode with BMI-dependent low dose protocols...
February 7, 2018: British Journal of Radiology
https://www.readbyqxmd.com/read/29410034/repeated-endovascular-treatments-in-patients-with-recurrent-cerebral-vasospasms-after-subarachnoid-hemorrhage-a-worthwhile-strategy
#20
Claudia Ditz, Alexander Neumann, Jann Wojak, Emma Smith, Jan Gliemroth, Volker Tronnier, Jan Küchler
OBJECTIVE: Endovascular interventions in patients with subarachnoid hemorrhage (SAH) and symptomatic cerebral vasospasm (sCVS) are commonly performed. But potential benefits of repeated interventions have not been proven. The aim of this study was to show the potential burden and opportunities of repeated endovascular interventions in case of recurrent sCVS. METHODS: We reviewed 15 patients with SAH who underwent more than 2 endovascular treatments of recurrent sCVS (CVS group) regarding the radiation doses, their clinical course and their functional outcome...
January 31, 2018: World Neurosurgery
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