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https://www.readbyqxmd.com/read/27905183/mini-c-arm-faster-cheaper-safer
#1
Tom J Gieroba, Nicole Williams, Georgia Antoniou, Peter J Cundy
BACKGROUND: Mini C-arm image intensifiers (IIs) are promoted to permit lower radiation dose than traditional IIs with a lower purchase price and without the need for a radiographer, saving time. In real-world usage, radiation dose is not always lower. METHODS: A retrospective review of prospectively collected data for 620 children undergoing forearm fracture reduction in theatre was undertaken. Imaging was performed with the Fluoroscan mini C-arm or a comparison traditional II...
November 30, 2016: ANZ Journal of Surgery
https://www.readbyqxmd.com/read/27894283/small-lung-lesions-invisible-under-fluoroscopy-are-located-accurately-by-three-dimensional-localization-technique-on-chest-wall-surface-and-performed-bronchoscopy-procedures-to-increase-diagnostic-yields
#2
Chaosheng Deng, Xiaoming Cao, Dawen Wu, Haibo Ding, Ruixiong You, Qunlin Chen, Linying Chen, Xin Zhang, Qiaoxian Zhang, Yongquan Wu
BACKGROUND: Nowadays, small peripheral pulmonary lesions (PPLs) are frequently detected and the prognosis of lung cancer depends on the early diagnosis. Because of the high fee and requiring specialized training, many advanced techniques are not available in many developing countries and rural districts. METHODS: Three sets of opaque soft copper wires visible under the fluoroscopy (Flu) in the Flu-flexible bronchoscopy (FB) group (n = 24), which determined the three planes of the lesion, were respectively placed firmly on the surface of the chest wall with adhesive tape on the chest wall...
November 29, 2016: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/27884358/application-of-3-dimensional-computed-tomographic-image-guidance-to-watchman-implantation-and-impact-on%C3%A2-early-operator-learning-curve-single-center-experience
#3
Dee Dee Wang, Marvin Eng, Daniel Kupsky, Eric Myers, Michael Forbes, Mehnaz Rahman, Mohammad Zaidan, Sachin Parikh, Janet Wyman, Milan Pantelic, Thomas Song, Jeff Nadig, Patrick Karabon, Adam Greenbaum, William O'Neill
OBJECTIVES: The aim of this study was to examine the impact of 3-dimensional (3D) computed tomographic (CT) guided procedural planning for left atrial appendage (LAA) occlusion on the early operator WATCHMAN learning curve. BACKGROUND: Traditional WATCHMAN implantation is dependent on 2-dimensional transesophageal echocardiographic (TEE) sizing and intraprocedural guidance. METHODS: LAA occlusion with the WATCHMAN device was performed in 53 patients...
November 28, 2016: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/27867175/understanding-the-scatter-radiation-distribution-during-c-arm-ct-examination-a-body-phantom-study
#4
Toshiyo Norimasa, Akihiko Kakimi, Yoshinori Takao, Shohei Sasaki, Yutaka Katayama, Daisuke Himoto, Shinichiro Izuta, Takao Ichida
The purpose of this study was to understand the scatter radiation distribution during C-arm CT examination in the interventional radiography (IVR) room to show the escaped area and the radiation protective method. The C-arm rotates 200° in 5 s. The tube voltage was 90 kV, and the entrance dose to the detector was 0.36 μGy/frame during C-arm CT examination. The scattered doses were measured each 50 cm from the isocenter like a grid pattern. The heights of the measurement were 50, 100, and 150 cm from the floor...
2016: Nihon Hoshasen Gijutsu Gakkai Zasshi
https://www.readbyqxmd.com/read/27847562/optimal-c-arm-angulation-during-transcatheter-aortic-valve-replacement-accuracy-of-a-rotational-c-arm-computed-tomography-based-three-dimensional-heart-model
#5
Verena Veulemans, Sabine Mollus, Axel Saalbach, Max Pietsch, Katharina Hellhammer, Tobias Zeus, Ralf Westenfeld, Jürgen Weese, Malte Kelm, Jan Balzer
AIM: To investigate the accuracy of a rotational C-arm CT-based 3D heart model to predict an optimal C-arm configuration during transcatheter aortic valve replacement (TAVR). METHODS: Rotational C-arm CT (RCT) under rapid ventricular pacing was performed in 57 consecutive patients with severe aortic stenosis as part of the pre-procedural cardiac catheterization. With prototype software each RCT data set was segmented using a 3D heart model. From that the line of perpendicularity curve was obtained that generates a perpendicular view of the aortic annulus according to the right-cusp rule...
October 26, 2016: World Journal of Cardiology
https://www.readbyqxmd.com/read/27844231/a-new-method-to-precisely-control-the-depth-of-percutaneous-screws-into-the-pedicle-by-counting-the-rotation-number-of-the-screw-with-low-radiation-exposure-technical-note
#6
Xu Li, Feng Zhang, Wenzhi Zhang, Xifu Shang, Jintao Han, Pengfei Liu
STUDY DESIGN: Technique note. OBJECTIVES: To report a new method for precisely controlling the depth of percutaneous pedicle screws (PPS)-without radiation exposure to surgeons and less fluoroscopy exposure to patients than with conventional methods. PPS is widely used in minimal invasive spine surgery; the advantages include reduced muscle damage, pain, and hospital stays. However, placement of PPS demands repeated checking with fluoroscopy. Thus, radiation exposure is considerable for both surgeons and patients...
November 14, 2016: European Spine Journal
https://www.readbyqxmd.com/read/27836836/electromyography-needle-breaks-within-the-perineum-a-rare-complication-of-urodynamics-not-reported-earlier-and-lesson-learnt
#7
Kawaljit Singh, Ashok Kumar Sokhal, Ashok Kumar Gupta, Ankur Bansal
The urodynamic study (UDS) is nowadays frequently used by the urologist worldwide to aid in the diagnosis of various urological disorders and electromyography (EMG) is an integral part of it. EMG is performed either by using surface electrodes or concentric needle electrodes. We report an unusual case in which the concentric EMG needle was accidentally broken within the perineum of a man aged 60 years undergoing urodynamics. The needle was removed urgently in a minimally invasive manner under the C-arm guidance without any associated morbidity...
November 11, 2016: BMJ Case Reports
https://www.readbyqxmd.com/read/27832013/surgical-resection-of-osteoid-osteoma-and-osteoblastoma-of-the-spine
#8
Muayad Kadhim, Odion Binitie, Patrick O'Toole, Emmanouil Grigoriou, Camila B De Mattos, John P Dormans
: Intraoperative radiographic guidance has traditionally been utilized in orthopedic surgery through 2-D navigation with the C-arm and recently with 3-D navigation with the O-arm. The aim of this study was to describe the outcome of surgical treatment of spinal osteoblastoma and osteoid osteoma with the utilization of the O-arm and conventional C-arm guidance. This is a retrospective cohort study of patients with spinal osteoid osteoma and or osteoblastoma who were treated at our institution between 2002 and 2011...
November 9, 2016: Journal of Pediatric Orthopedics. Part B
https://www.readbyqxmd.com/read/27807113/breast-radiation-exposure-in-female-orthopaedic-surgeons
#9
Lindsey C Valone, Monique Chambers, Lisa Lattanza, Michelle A James
BACKGROUND: Breast cancer prevalence is higher among female orthopaedic surgeons compared with U.S. women. The most common breast cancer site, the upper outer quadrant (UOQ), may not be adequately shielded from intraoperative radiation. Factors associated with higher breast radiation exposure (protective apron size and type, surgeon position, and C-arm position) have yet to be established. METHODS: An anthropomorphic torso phantom, simulating the female surgeon, was placed adjacent to a standard operating table...
November 2, 2016: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/27790322/role-of-transpedicular-percutaneous-vertebral-biopsy-for-diagnosis-of-pathology-in-vertebral-compression-fractures
#10
Saurabh Shrinivas Pagdal, Sunil Nadkarni, Sharad Moreshwar Hardikar, Madan Sharad Hardikar
STUDY DESIGN: Retrospective observational study. PURPOSE: To identify the role of percutaneous vertebral biopsy in histopathological diagnosis of vertebral compression fractures and to identify the frequency of unexpected malignancy in vertebral compression fractures. OVERVIEW OF LITERATURE: Vertebral compression fractures are common in the Indian population. Magnetic resonance imaging and nuclear imaging have some limitations in the diagnosis of definitive pathology of vertebral compression fractures...
October 2016: Asian Spine Journal
https://www.readbyqxmd.com/read/27784118/c-arm-computed-tomography-adds-diagnostic-information-in-patients-with-chronic-thromboembolic-pulmonary-hypertension-and-a-positive-v-q-spect
#11
J B Hinrichs, T Werncke, T Kaireit, M M Hoeper, K M Olsson, J C Kamp, F K Wacker, F Bengel, C von Falck, I Schatka, B C Meyer
Purpose: To determine if C-Arm computed tomography (CACT) has added diagnostic value in patients suffering from chronic thromboembolic pulmonary hypertension (CTEPH) with a positive mismatch pattern in ventilation/perfusion single photon emission computed tomography (V/Q SPECT). Materials and Methods: 28 patients (23 men, 5 women, 62 ± 18 years) with CTEPH who had undergone SPECT, followed by CACT and right heart catheterization (RHC) were included. Two independent readers reviewed SPECT and CACT. Findings indicating CTEPH and their location (segmental or sub-segmental) were identified (V/Q mismatch in SPECT and vascular pathologies in CACT)...
October 26, 2016: RöFo: Fortschritte Auf Dem Gebiete der Röntgenstrahlen und der Nuklearmedizin
https://www.readbyqxmd.com/read/27782692/interventional-dual-energy-imaging-feasibility-of-rapid-kv-switching-on-a-c-arm-ct-system
#12
K Müller, S Datta, M Ahmad, J-H Choi, T Moore, L Pung, C Niebler, G E Gold, A Maier, R Fahrig
PURPOSE: In the last years, dual-energy CT imaging has shown clinical value, thanks to its ability to differentiate materials based on their atomic number and to exploit different properties of images acquired at two different energies. C-arm CT systems are used to guide procedures in the interventional suite. Until now, there are no commercially available systems that employ dual-energy material decomposition. This paper explores the feasibility of implementing a fast kV-switching technique on a clinically available angiographic system for acquiring dual-energy C-arm CT images...
October 2016: Medical Physics
https://www.readbyqxmd.com/read/27777477/study-of-scattered-radiation-during-fluoroscopy-in-hip-surgery
#13
Oksana Lesyuk, Patrick Emmanuel Sousa, Sónia Isabel do Espirito Santo Rodrigues, António Fernando Abrantes, Rui Pedro Pereira de Almeida, João Pedro Pinheiro, Kevin Barros Azevedo, Luís Pedro Vieira Ribeiro
OBJECTIVE: To measure the scattered radiation dose at different positions simulating hip surgery. MATERIALS AND METHODS: We simulated fluoroscopy-assisted hip surgery in order to study the distribution of scattered radiation in the operating room. To simulate the patient, we used a anthropomorphic whole-body phantom, and we used an X-ray-specific detector to quantify the radiation. Radiographs were obtained with a mobile C-arm X-ray system in continuous scan mode, with the tube at 0º (configuration 1) or 90º (configuration 2)...
July 2016: Radiologia Brasileira
https://www.readbyqxmd.com/read/27762236/nerve-cuff-electrode-using-embedded-magnets-and-its-application-to-hypoglossal-nerve-stimulation
#14
Jungmin Seo, Jee Hye Wee, Jeong Hoan Park, Pona Park, Jeong-Whun Kim, Sung June Kim
OBJECTIVE: A novel nerve cuff electrode with embedded magnets was fabricated and developed. In this study, a pair of magnets was fully embedded and encapsulated in a liquid crystal polymer (LCP) substrate to utilize magnetic force in order to replace the conventional installing techniques of cuff electrodes. In vitro and in vivo experiments were conducted to evaluate the feasibility of the magnet-embedded nerve cuff electrode (MENCE). Lastly, several issues pertaining to the MENCE such as the cuff-to-nerve diameter ratio, the force of the magnets, and possible concerns were discussed in the discussion section...
December 2016: Journal of Neural Engineering
https://www.readbyqxmd.com/read/27758120/bench-top-feasibility-testing-of-a-novel-percutaneous-renal-access-technique-the-laser-direct-alignment-radiation-reduction-technique-darrt
#15
Nazih Khater, Jim Ken-Chie Shen, Javier L Arenas, Mohamed Keheila, Muhannad Alsyouf, Jacob Martin, Michelle Lightfoot, Roger Li, Gaudencio Olgin, Jason Smith, D Duane Baldwin
: Basic Science Research Introduction: Traditional techniques for obtaining percutaneous renal access utilize continuous fluoroscopy. In an attempt to minimize radiation exposure, we describe a novel Laser DARRT (Direct Alignment Radiation Reduction Technique) for percutaneous access and test it in a bench-top model. METHODS: In this randomized-controlled bench-top study, twenty medical personnel obtained renal accesses using both the conventional bullseye technique and the Laser DARRT...
October 19, 2016: Journal of Endourology
https://www.readbyqxmd.com/read/27745815/reproducibility-of-parenchymal-blood-volume-measurements-using-an-angiographic-c-arm-ct-system
#16
Kerstin Mueller, Rebecca Fahrig, Michael Manhart, Yu Deuerling-Zheng, Jarrett Rosenberg, Teri Moore, Arundhuti Ganguly, Nishita Kothary
RATIONALE AND OBJECTIVES: Intra-procedural measurement of hepatic perfusion following liver embolization continues to be a challenge. Blood volume imaging before and after interventional procedures would allow identifying the treatment end point or even allow predicting treatment outcome. Recent liver oncology studies showed the feasibility of parenchymal blood volume (PBV) imaging using an angiographic C-arm system. This study was done to evaluate the reproducibility of PBV measurements using cone beam computed tomography (CBCT) before and after embolization of the liver in a swine model...
October 10, 2016: Academic Radiology
https://www.readbyqxmd.com/read/27739565/a-novel-fluoroscopic-approach-to-assessing-patient-positioning-in-total-hip-arthroplasty-accuracy-and-the-influence-of-body-mass-index
#17
Anton P Lambers, Robert Jennings, Andrew T Bucknill
INTRODUCTION: Accurate prosthetic cup placement is important in total hip arthroplasty (THA) and can be influenced by patient positioning. This study aims to assess the accuracy of patient positioning prior to THA, describe a new technique of assessment, and evaluate the influence of body mass index (BMI) on positioning error. METHODS: A consecutive series of 37 patients undergoing unilateral THA were investigated. After patient positioning in lateral decubitus, a lateral fluoroscopic image through the table was taken...
October 8, 2016: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/27723229/the-development-and-error-analysis-of-a-kinematic-parameters-based-spatial-positioning-method-for-an-orthopedic-navigation-robot-system
#18
Baoqing Pei, Gang Zhu, Yu Wang, Huiting Qiao, Xiangqian Chen, Binbin Wang, Xiaoyun Li, Weijun Zhang, Wenyong Liu, Yubo Fan
BACKGROUND: Spatial positioning is the key function of a surgical navigation robot system, and accuracy is the most important performance index of such a system. METHODS: The kinematic parameters of a six degrees of freedom (DOF) robot arm were used to form the transformation from intraoperative fluoroscopy images to a robot's coordinate system without C-arm calibration and to solve the redundant DOF problem. The influences of three typical error sources and their combination on the final navigation error were investigated through Monte Carlo simulation...
October 9, 2016: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
https://www.readbyqxmd.com/read/27718011/gun-barrel-view-of-the-anterior-pelvic-ring-for-percutaneous-anterior-column-or-superior-pubic-ramus-screw-placement
#19
Nicholas Quercetti, Brandon Horne, Zac DiPaolo, Michael J Prayson
BACKGROUND: Traditionally, operative fixation of pelvic and acetabular injuries involves complex approaches and significant complications. Accelerated rehabilitation, decreased soft tissue stripping and decreased wound complications are several benefits driving a recent interest in percutaneous fixation. We describe a new fluoroscopic view to guide the placement of screws within the anterior pelvic ring. METHODS: Twenty retrograde anterior pelvic ring screws were percutaneously placed in ten cadaveric specimens...
October 7, 2016: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/27694700/optimization-based-image-reconstruction-with-artifact-reduction-in-c-arm-cbct
#20
Dan Xia, David A Langan, Stephen B Solomon, Zheng Zhang, Buxin Chen, Hao Lai, Emil Y Sidky, Xiaochuan Pan
We investigate an optimization-based reconstruction, with an emphasis on image-artifact reduction, from data collected in C-arm cone-beam computed tomography (CBCT) employed in image-guided interventional procedures. In the study, an image to be reconstructed is formulated as a solution to a convex optimization program in which a weighted data divergence is minimized subject to a constraint on the image total variation (TV); a data-derivative fidelity is introduced in the program specifically for effectively suppressing dominant, low-frequency data artifact caused by, e...
October 21, 2016: Physics in Medicine and Biology
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