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https://www.readbyqxmd.com/read/28527025/pose-aware-c-arm-for-automatic-re-initialization-of-interventional-2d-3d-image-registration
#1
Javad Fotouhi, Bernhard Fuerst, Alex Johnson, Sing Chun Lee, Russell Taylor, Greg Osgood, Nassir Navab, Mehran Armand
PURPOSE: In minimally invasive interventions assisted by C-arm imaging, there is a demand to fuse the intra-interventional 2D C-arm image with pre-interventional 3D patient data to enable surgical guidance. The commonly used intensity-based 2D/3D registration has a limited capture range and is sensitive to initialization. We propose to utilize an opto/X-ray C-arm system which allows to maintain the registration during intervention by automating the re-initialization for the 2D/3D image registration...
May 19, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28474255/real-time-fluoroscopic-needle-guidance-in-the-interventional-radiology-suite-using-navigational-software-for-percutaneous-bone-biopsies-in-children
#2
Sphoorti Shellikeri, Randolph M Setser, Tiffany J Hwang, Abhay Srinivasan, Ganesh Krishnamurthy, Seth Vatsky, Erin Girard, Xiaowei Zhu, Marc S Keller, Anne Marie Cahill
BACKGROUND: Navigational software provides real-time fluoroscopic needle guidance for percutaneous procedures in the Interventional Radiology (IR) suite. OBJECTIVE: We describe our experience with navigational software for pediatric percutaneous bone biopsies in the IR suite and compare technical success, diagnostic accuracy, radiation dose and procedure time with that of CT-guided biopsies. MATERIALS AND METHODS: Pediatric bone biopsies performed using navigational software (Syngo iGuide, Siemens Healthcare) from 2011 to 2016 were prospectively included and anatomically matched CT-guided bone biopsies from 2008 to 2016 were retrospectively reviewed with institutional review board approval...
May 4, 2017: Pediatric Radiology
https://www.readbyqxmd.com/read/28472393/fluoroscopic-c-arm-and-ct-guided-selective-radiofrequency-ablation-for-trigeminal-and-glossopharyngeal-facial-pain-syndromes
#3
Nicholas A Telischak, Jeremy J Heit, Lucas W Campos, Omar A Choudhri, Huy M Do, Xiang Qian
Objectives.:  Percutaneous radiofrequency ablation (RFA) of the gasserian ganglion through the foramen ovale and the glossopharyngeal nerve at the jugular foramen is a classical approach to treating trigeminal neuralgia (TN) and glossopharyngeal neuralgia (GPN), respectively. However, it can be technically challenging with serious complications. We have thus developed a novel technique utilizing C-arm and computerized tomography (CT) guidance to block TN and GPN. Our goals were to describe a three-dimensional image-based technique to improve patient comfort and to decrease procedural time associated with needle guidance...
May 2, 2017: Pain Medicine: the Official Journal of the American Academy of Pain Medicine
https://www.readbyqxmd.com/read/28458936/anterior-impingement-syndrome-of-the-ankle-caused-by-osteoid-osteoma-in-the-talar-neck-treated-with-arthroscopy-and-3d-c-arm-based-imaging
#4
Masachika Ikegami, Takumi Matsumoto, Song Ho Chang, Hiroshi Kobayashi, Yusuke Shinoda, Sakae Tanaka
Osteoid osteoma in periarticular lesions tends to have an unusual presentation that likely leads to a delayed or missed diagnosis compared with a typical osteoid osteoma in the metaphysis or diaphysis of the long bone. In cases that are unresponsive to conservative treatment, surgical interventions including en bloc resection, computed tomography-guided percutaneous treatment, and arthroscopic resection have been performed; however, these methods frequently result in inadequate tumor resection and recurrence...
2017: Case Reports in Orthopedics
https://www.readbyqxmd.com/read/28455631/real-time-three-dimensional-ct-and-mri-to-guide-interventions-for-congenital-heart-disease-and-acquired-pulmonary-vein-stenosis
#5
Patcharapong Suntharos, Randolph M Setser, Sharon Bradley-Skelton, Lourdes R Prieto
To validate the feasibility and spatial accuracy of pre-procedural 3D images to 3D rotational fluoroscopy registration to guide interventional procedures in patients with congenital heart disease and acquired pulmonary vein stenosis. Cardiac interventions in patients with congenital and structural heart disease require complex catheter manipulation. Current technology allows registration of the anatomy obtained from 3D CT and/or MRI to be overlaid onto fluoroscopy. Thirty patients scheduled for interventional procedures from 12/2012 to 8/2015 were prospectively recruited...
April 28, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28449858/computer-assisted-surgery-the-use-of-stored-intraoperative-images-for-accurate-restoration-of-femoral-length-and-rotational-alignment-after-fracture
#6
David M Kahler
Most femoral fractures are now managed with minimally invasive internal fixation. In the absence of formal exposure of the fracture lines, these procedures make heavy use of C-arm fluoroscopy to allow both fracture reduction and placement of implants, at the expense of measurable radiation exposure to both patient and surgeon. Although this technology has been commercially available for over a decade, it has not yet been widely accepted by the Orthopaedic community.
April 24, 2017: Injury
https://www.readbyqxmd.com/read/28441687/c-arm-positioning-is-a-significant-source-of-radiation-in-spine-surgery
#7
Elizabeth W Reiser, Rupen Desai, Sarah A Byrd, Harrison Farber, Deborah Chi, Cary S Idler, Robert E Isaacs
STUDY DESIGN: Prospective chart review. OBJECTIVE: It is well-known that radiation exposure during minimally invasive spine procedures can be substantial. Less interest has focused on setup radiation exposure before incision, including preoperative images used for surgical approach. The present study seeks to better quantify the significance of setup radiation in the total radiation exposure of minimally invasive spine surgery. SUMMARY OF BACKGROUND DATA: Radiographic localization is necessary in minimally invasive spine procedures to visualize anatomy, but increased radiation exposure is associated with health risks...
May 1, 2017: Spine
https://www.readbyqxmd.com/read/28439307/fluoroscopic-imaging-overestimates-the-screw-tip-to-subchondral-bone-distance-in-a-cadaveric-model-of-slipped-capital-femoral-epiphysis
#8
M J Heffernan, B Snyder, H Zhou, X Li
PURPOSE: Intra-operative imaging plays a key role in screw placement for slipped capital femoral epiphysis (SCFE). Complications have been associated with inadequate screw position. The purpose of this study was to evaluate computed tomography (CT) (3D fluoroscopy) and standard fluoroscopy (C-arm) images as compared with direct anatomic measurement to determine final screw position in a cadaveric SCFE model. METHODS: Osteotomy with pinning was performed at the physeal scar in ten cadaveric hips...
2017: Journal of Children's Orthopaedics
https://www.readbyqxmd.com/read/28429363/two-unilateral-puncturation-comparative-analyses-of-multiple-level-fresh-osteoporotic-vertebral-body-compression-fractures-treated-with-percutaneous-vertebroplasty-guided-by-c-arm-fluoroscopy-or-in-senile-patients
#9
J-C Xu, G-H Wu, L-L Zhou, X-J Yang, J-T Liu
OBJECTIVE:  To compare the curative effects of two unilateral puncturation percutaneous vertebroplasty (PVP) for the pain caused by multiple-level osteoporotic vertebral body compression fractures (OVCF) in senile patients. PATIENTS AND METHODS: From June 2008 to November 2014, eighty-nine cases suffering from fresh multiple-level OVCF were randomly divided into experimental group (n=51) and control group (n=38). Patients underwent PVP guided by C-arm fluoroscopy in the prone position...
April 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28422397/a-novel-radiation-protection-device-based-on-tungsten-functional-paper-for-application-in-interventional-radiology
#10
Hajime Monzen, Mikoto Tamura, Kohei Shimomura, Yuichi Onishi, Shinichi Nakayama, Takahiro Fujimoto, Kenji Matsumoto, Kohei Hanaoka, Takeshi Kamomae
Tungsten functional paper (TFP), which contains 80% tungsten by weight, has radiation-shielding properties. We investigated the use of TFP for the protection of operators during interventional or therapeutic angiography. The air kerma rate of scattered radiation from a simulated patient was measured, with and without TFP, using a water-equivalent phantom and fixed C-arm fluoroscopy. Measurements were taken at the level of the operator's eye, chest, waist, and knee, with a variable number of TFP sheets used for shielding...
April 19, 2017: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28416994/the-radiation-safety-education-and-the-pain-physicians-efforts-to-reduce-radiation-exposure
#11
Tae Hee Kim, Seung Wan Hong, Nam Sik Woo, Hae Kyoung Kim, Jae Hun Kim
BACKGROUND: C-arm fluoroscopy equipment is important for interventional pain management and can cause radiation injury to physicians and patients. We compared radiation safety education and efforts to reduce the radiation exposure of pain specialists. METHODS: A survey of 49 pain specialists was conducted anonymously in 2016. The questionnaire had 16 questions. That questionnaire was about radiation safety knowledge and efforts to reduce exposure. We investigated the correlation between radiation safety education and efforts of radiation protection...
April 2017: Korean Journal of Pain
https://www.readbyqxmd.com/read/28414927/integration-of-free-hand-3d-ultrasound-and-mobile-c-arm-cone-beam-ct-feasibility-and-characterization-for-real-time-guidance-of-needle-insertion
#12
E Marinetto, A Uneri, T De Silva, S Reaungamornrat, W Zbijewski, A Sisniega, S Vogt, G Kleinszig, J Pascau, J H Siewerdsen
This work presents development of an integrated ultrasound (US)-cone-beam CT (CBCT) system for image-guided needle interventions, combining a low-cost ultrasound system (Interson VC 7.5MHz, Pleasanton, CA) with a mobile C-arm for fluoroscopy and CBCT via use of a surgical tracker. Imaging performance of the ultrasound system was characterized in terms of depth-dependent contrast-to-noise ratio (CNR) and spatial resolution. US-CBCT system was evaluated in phantom studies simulating three needle-based procedures: drug delivery, tumor ablation, and lumbar puncture...
April 3, 2017: Computerized Medical Imaging and Graphics: the Official Journal of the Computerized Medical Imaging Society
https://www.readbyqxmd.com/read/28413743/real-time-fluoroscopic-and-c-arm-computed-tomography-evaluation-of-ommaya-reservoir-integrity
#13
Adrienne M Moraff, Melanie Hayden Gephart, Larry M Shuer, Jeremy J Heit
We describe a case of a 24-year-old patient with relapsed acute myelogenous leukemia involving the central nervous system. After placement of an Ommaya reservoir for intrathecal chemotherapy administration, the patient developed progressive headache, nausea, and drowsiness and was found to have an enlarging subdural collection underlying the Ommaya. To exclude leakage of the Ommaya system into the subdural space, real-time fluoroscopic and C-arm computed tomographic evaluation of the Ommaya reservoir was performed after iodinated contrast injection into the reservoir...
March 15, 2017: Curēus
https://www.readbyqxmd.com/read/28408632/4d-dsa-for-dynamic-visualization-of-cerebral-vasculature-a-single-center-experience-in-26-cases
#14
S Lang, P Gölitz, T Struffert, J Rösch, K Rössler, M Kowarschik, C Strother, A Doerfler
BACKGROUND AND PURPOSE: 4D DSA allows acquisition of time-resolved 3D reconstructions of cerebral vessels by using C-arm conebeam CT systems. The aim of our study was to evaluate this new method by qualitative and quantitative means. MATERIALS AND METHODS: 2D and 4D DSA datasets were acquired in patients presenting with AVMs, dural arteriovenous fistulas, and cerebral aneurysms. 4D DSA was compared with 2D DSA in a consensus reading of qualitative and quantitative parameters of AVMs (eg, location, feeder, associated aneurysms, nidus size, drainage, Martin-Spetzler Score), dural arteriovenous fistulas (eg, fistulous point, main feeder, diameter of the main feeder, drainage), and cerebral aneurysms (location, neck configuration, aneurysmal size)...
April 13, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28408264/single-session-hematoma-removal-and-transcranial-coil-embolization-for-a-cavernous-sinus-dural-arteriovenous-fistula-a-technical-case-report
#15
Yosuke Akamatsu, Kenichi Sato, Hidenori Endo, Yasushi Matsumoto, Teiji Tominaga
BACKGROUND: Patients with cavernous sinus dural arteriovenous fistulas (CS dAVFs) with cortical venous varix are indicated for aggressive treatment because of the associated risk for intracranial hemorrhage. CASE DESCRIPTION: We present a case of surgical transvenous embolization in an 84-year-old woman with CS dAVF who presented with massive intracerebral hematoma. Cerebral angiograms revealed the dural AVF drained only into the superficial middle cerebral vein...
April 10, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28403104/effect-of-bipolar-pulsed-radiofrequency-on-refractory-chronic-cervical-radicular-pain-a-report-of-two-cases
#16
Min Cheol Chang
RATIONALE: Despite undergoing transforaminal epidural steroid injection (TFESI), many patients complain of persisting cervical radicular pain. For the management of chronic cervical radicular pain, clinicians are widely applying pulsed radiofrequency (PRF) stimulation to dorsal root ganglions (DRGs). To enhance the effect of PRF stimulation, we conducted bipolar PRF stimulation in 2 patients with chronic cervical radicular pain that was refractory to monopolar PRF and repeated TFESIs...
April 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28393672/radiation-awareness-for-endovascular-abdominal-aortic-aneurysm-repair-in-the-hybrid-operating-room-an-instant-patient-risk-chart-for-daily-practice
#17
Quirina M de Ruiter, Crystel M Gijsberts, Constantijn E Hazenberg, Frans L Moll, Joost A van Herwaarden
PURPOSE: To determine which patient and C-arm characteristics are the strongest predictors of intraoperative patient radiation dose rates (DRs) during endovascular aneurysm repair (EVAR) procedures and create a patient risk chart. METHODS: A retrospective analysis was performed of 74 EVAR procedures, including 16,889 X-ray runs using fixed C-arm imaging equipment. Four multivariate log-linear mixed models (with patient as a random effect) were constructed. Mean air kerma DR (DRAK, mGy/s) and the mean dose area product DR (DRDAP, mGycm(2)/s) were the outcome variables utilized for fluoroscopy as differentiated from digital subtraction angiography (DSA)...
April 1, 2017: Journal of Endovascular Therapy
https://www.readbyqxmd.com/read/28392852/a-systematic-review-and-meta-analysis-of-c-arm-cone-beam-ct-guided-percutaneous-transthoracic-needle-biopsy-of-lung-nodules
#18
Gao-Wu Yan, Anup Bhetuwal, Gao-Wen Yan, Qin-Quan Sun, Xiang-Ke Niu, Yu Zhou, Li-Fa Li, Bin-Zhong Li, Hao Zeng, Chuan Zhang, Bing Li, Xiao-Xue Xu, Han-Feng Yang, Yong Du
BACKGROUND: A systematic review and meta-analysis of all available publications was performed to evaluate the diagnostic accuracy of percutaneous transthoracic needle biopsy (PTNB) using a C-Arm Cone-Beam CT (CBCT) system in patients with lung nodules. MATERIAL/METHODS: Thedatabases of PUBMED, OVID, EBSCO, EMBASE, and China National Knowledge Infrastructure (CNKI) were systematically searched for relevant original articles on the diagnostic accuracy of CBCT-guided PTNB for the diagnosis of nodules in the lungs...
2017: Polish Journal of Radiology
https://www.readbyqxmd.com/read/28377262/evaluation-of-malrotation-following-intramedullary-nailing-in-a-femoral-shaft-fracture-model-can-a-3d-c-arm-improve-accuracy
#19
Austin J Ramme, Jonathan Egol, Gregory Chang, Roy I Davidovitch, Sanjit Konda
INTRODUCTION: Difficulty determining anatomic rotation following intramedullary (IM) nailing of the femur continues to be problematic for surgeons. Clinical exam and fluoroscopic imaging of the hip and knee have been used to estimate femoral version, but are inaccurate. We hypothesize that 3D c-arm imaging can be used to accurately measure femoral version following IM nailing of femur fractures to prevent rotational malreduction. METHODS: A midshaft osteotomy was created in a femur Sawbone to simulate a transverse diaphyseal fracture...
March 31, 2017: Injury
https://www.readbyqxmd.com/read/28371198/evaluation-of-the-new-c-arm-guiding-system-clearguide%C3%A2-in-an-orthopaedic-and-trauma-operating-theatre
#20
Marcus Christian Müller, Sophie Frege, Andreas Christian Strauss, Martin Gathen, Michael Windemuth, Eva Nadine Striepens
BACKGROUND: The objective was to evaluate whether the new intraoperative C-arm guiding system ClearGuide® (CG) reduces radiation exposure of the staff in an Orthopaedic and Trauma operation theatre. METHODS: Data of 95 patients CG was used were retrospectively compared using matched-pair analysis with controls without CG. Radiation dose (RD), fluoroscopic time (FT) and operation time (OT) were analysed in ten types of operative procedures. RESULTS: Use of CG led to a significant reduction (p ≤ 0...
April 3, 2017: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
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