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https://www.readbyqxmd.com/read/28917250/emerging-technologies-in-stereotactic-body-radiotherapy
#1
Lijun Ma, Lei Wang, Chia-Lin Tseng, Arjun Sahgal
Stereotactic body radiation therapy (SBRT) stems from the initial developments of intra-cranial stereotactic radiosurgery (SRS). Despite similarity in their names and clinical goals of delivering a sufficiently high tumoricidal dose, maximal sparing of the surrounding normal tissues and a short treatment course, SBRT technologies have transformed from the early days of body frame-based treatments with X-ray verification to primarily image-guided procedures with cone-beam CT or stereoscopic X-ray systems and non-rigid body immo-bilization...
September 2017: Chinese Clinical Oncology
https://www.readbyqxmd.com/read/28901617/dual-rotation-c-arm-cone-beam-computed-tomography-to-increase-low-contrast-detection
#2
Aymeric Reshef, Cyril Riddell, Yves Trousset, Saïd Ladjal, Isabelle Bloch
PURPOSE: This paper investigates the capabilities of a dual-rotation C-arm cone-beam computed tomography (CBCT) framework to improve non-contrast-enhanced low-contrast detection for full volume or volume-of-interest (VOI) brain imaging. METHOD: The idea is to associate two C-arm short-scan rotational acquisitions (spins): one over the full detector field of view (FOV) at low dose, and one collimated to deliver a higher dose to the central densest parts of the head...
September 2017: Medical Physics
https://www.readbyqxmd.com/read/28893700/comparison-of-radiation-exposure-during-endovascular-treatment-of-peripheral-arterial-disease-with-flat-panel-detectors-on-mobile-c-arm-vs-fixed-systems
#3
Marie Guillou, Blandine Maurel, Hatem Necib, Pierre-Alexandre Vent, Alain Costargent, Philippe Chaillou, Yann Gouëffic, Adrien Kaladji
PURPOSE: Flat-panel detectors on mobile C-arm (MC-arm) systems are currently challenging fixed C-arm (FC-arm) systems used in hybrid operating rooms. MC-arm systems offer an alternative to FC-arm systems in the endovascular treatment of peripheral arterial disease (PAD) but their efficiency has not been evaluated comparatively. METHODS: Two series of patients undergoing arteriography with intention to treat were included. Each series consisted of two non-randomized groups: an MC-arm group and an FC-arm group...
September 8, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28891900/use-of-a-balloon-catheter-with-intraoperative-c-arm-fluoroscan-for-reduction-of-zygomatic-arch-fractures
#4
Woon Jae Noh, Tae Jung Park, Joo Yeon Kim, Jae Hwan Kwon
BACKGROUND AND OBJECTIVES: The purpose of this study was to evaluate the usefulness of C-arm fluoroscan with a balloon catheter in patients undergoing closed reduction of zygomatic arch fractures. SUBJECTS AND METHODS: All patients who had zygomatic arch reduction surgery between 2006 and 2015 were identified and classified into 2 groups. Group A included those patients who underwent closed reduction of zygomatic arch fractures. Group B included those who underwent zygomatic arch reduction surgery with a C-arm fluoroscan and supporting balloon...
September 7, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28887680/cervical-vertebroplasty-under-sedoanalgesia-using-combined-ultrasonography-and-fluoroscopy-guidance-a-novel-technique
#5
Serbülent Gökhan Beyaz, Havva Sayhan, Mustafa Erkan İnanmaz, Mustafa Orhan
PURPOSE: The aim of this report was to describe a case using combined USG and fluoroscopy for cervical VP via a percutaneous route under sedoanalgesia. METHODS: A 70-year-old male patient had severe neck pain for 6 weeks because of metastatic mass lesions in C6. After the decision to VP, the patient was placed on the operating table and 2 mg midazolam and 75 µg fentanyl were administered for conscious sedation. Localisation of the carotid artery, internal jugular vein, and trachea had been determined with USG...
September 8, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28882771/eccentric-technique-for-foraminoplasty-in-percutaneous-endoscopic-transforaminal-procedure-a-technical-note
#6
Zhaoyu Ba, Zhiqiang Li, Zhonghan Liu, Haoxi Li, Desheng Wu, Jianguang Zhu
OBJECTIVE: To describe a modified technique usied for foraminoplasty in percutaneous endoscopic transforaminal procedure. METHODS: 58 patients (20 males and 38 females, average age 52.5 years) underwent percutaneous endoscopic transforaminal procedure by using our modified technique. Under the guidance of C-arm fluoroscopy, a kirschner wire was inserted into targeted superior articular process. After expanding the soft tissues, a trepan with the largest diameter was located through the kirschner wire and the angle of trepan was flexible enough to adjust to different operative conditions...
September 4, 2017: International Journal of Surgery
https://www.readbyqxmd.com/read/28875339/c-arm-cone-beam-ct-for-intraprocedural-image-fusion-and-3d-guidance-in-portal-vein-embolization-pve
#7
Willie M Lüdemann, Georg Böning, Julius Chapiro, Martin Jonczyk, Dominik Geisel, Dirk Schnapauff, Gero Wieners, Moritz Schmelzle, Sascha Chopra, Rolf W Günther, Bernhard Gebauer, Florian Streitparth
PURPOSE: Portal vein embolization (PVE) is applied in patients with extended oncologic liver disease to induce hyperplasia of the future liver remnant and make resection feasible. Ultrasound (US) guidance is the gold standard for percutaneous portal vein access. This study evaluated feasibility and safety of C-arm cone beam computed tomography (CBCT) for needle guidance. MATERIALS AND METHODS: In 10 patients, puncture was performed under 3D needle guidance in a CBCT data set...
September 5, 2017: Cardiovascular and Interventional Radiology
https://www.readbyqxmd.com/read/28845380/endovascular-extraction-of-a-needle-from-the-internal-carotid-artery-a-novel-approach-to-a-controversial-dental-misadventure
#8
Jonathan P Giurintano, Jessica Somerville, Merry Sebelik, Daniel Hoit, L Madison Michael, Courtney B Shires
Objective  To review the literature concerning the management of dental needles broken off into the deep spaces of the neck, to report what we believe is the first case of a fractured dental needle migrating into the jugular foramen, and the unconventional use of endovascular intervention to retrieve the needle fragment. Design  Case report with review of literature. Setting  Academic tertiary care center. Participants  Intervention was performed by the otolaryngology-head and neck surgery, vascular surgery, and neurovascular interventional radiology teams...
July 2017: Journal of Neurological Surgery Reports
https://www.readbyqxmd.com/read/28838379/phase-ii-study-of-olaratumab-with-paclitaxel-carboplatin-p-c-or-p-c-alone-in-previously-untreated-advanced-nsclc
#9
David E Gerber, Paul Swanson, Ariel Lopez-Chavez, Lucas Wong, Afshin Dowlati, Nathan A Pennell, Damien M Cronier, Amy Qin, Robert Ilaria, Jan Cosaert, Ashwin Shahir, Maria Q Baggstrom
BACKGROUND: In non-small cell lung cancer (NSCLC), platelet-derived growth factor receptor (PDGFR) mediates angiogenesis, tissue invasion, and tumor interstitial pressure. Olaratumab (IMC-3G3) is a fully human anti-PDGFRα monoclonal antibody. This Phase II study assessed safety and efficacy of olaratumab+paclitaxel/carboplatin (P/C) versus P/C alone for previously untreated advanced NSCLC. MATERIALS AND METHODS: Patients received up to six 21-day cycles of P 200mg/m(2) and C AUC 6 (day 1)±olaratumab 15mg/kg (days 1 and 8)...
September 2017: Lung Cancer: Journal of the International Association for the Study of Lung Cancer
https://www.readbyqxmd.com/read/28830239/a-robotic-c-arm-conebeam-ct-system-for-image-guided-proton-therapy-design-and-performance
#10
Chiaho Hua, Weiguang Yao, Takao Kidani, Kazuo Tomida, Saori Ozawa, Takenori Nishimura, Tatsuya Fujisawa, Ryousuke Shinagawa, Thomas E Merchant
OBJECTIVE: A ceiling-mounted robotic C-arm cone beam computed tomography (CBCT) system was developed for use with a 190° proton gantry system and a 6-degree-of-freedom robotic patient positioner. We report on the mechanical design, system accuracy, image quality, image guidance accuracy, imaging dose, workflow, safety and collision-avoidance. METHODS: The robotic CBCT system couples a rotating C-ring to the C-arm concentrically with a kV X-ray tube and a flat-panel imager mounted to the C-ring...
August 22, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28821928/is-lead-shielding-of-patients-necessary-during-fluoroscopic-procedures-a-study-based-on-kyphoplasty
#11
Joshua R Smith, Rebecca M Marsh, Michael S Silosky
OBJECTIVE: To determine the benefits, risks, and limitations associated with wrapping a patient with lead shielding during fluoroscopy-guided kyphoplasty procedures as a way to reduce operator radiation exposure. MATERIALS AND METHODS: An anthropomorphic phantom was used to mimic a patient undergoing a kyphoplasty procedure under fluoroscopic guidance. Radiation measurements of the air kerma rate (AKR) were made at several locations and under various experimental conditions...
August 18, 2017: Skeletal Radiology
https://www.readbyqxmd.com/read/28820541/automatic-estimation-of-optimal-deployment-of-transcatheter-aortic-valve-implantation-using-computed-tomography
#12
Arthur Kerner, Sobhi Abadi, Roy Dotan, Marcia Javitt, Doron Aronson, Jonathan Lessick
BACKGROUND: A comparison was made between the accuracy of and time saved by using novel automated software for pre-procedural computed tomography (CT) planning before transcatheter aortic valve implantation (TAVI) and manual methods. Preprocedural CT to assess aortic annulus dimensions and predict the optimal C-arm implant angle before TAVI can reduce complications related to incorrect prosthesis sizing and positioning. METHODS: A total of 61 consecutive patients underwent TAVI using either the SAPIEN XT or CoreValve prosthesis...
March 2017: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/28809633/the-potential-of-the-icuc%C3%A2-documentation-concept-to-improve-trauma-surgery
#13
P Regazzoni, A A Fernandez Dell'oca, S M Perren
Conventional documentation of surgical procedures using only pre- and postoperative X-ray images and possibly a few intra-operative pictures does not allow secondary analysis of the technical performance in detail. In particular, the quality of the handling of tissues and surgical tools cannot be judged «post hoc», i.e. after the end of the surgical procedure. The invasiveness of the surgical act cannot yet be quantified. Surrogate invasiveness indices have therefore been developed. Furthermore, conventional documentation does not allow evaluation of the proper use of the C-arm both technically and with regard to fluoroscopy time...
2017: Acta Chirurgiae Orthopaedicae et Traumatologiae Cechoslovaca
https://www.readbyqxmd.com/read/28809629/-talar-neck-fractures-treated-using-percutaneous-screw-fixation
#14
R Veselý, M Kelbl, J Kacián, V Hulka, J Kočiš, R Kunovský
PURPOSE OF THE STUDY Closed reduction and percutaneous fixation of nondisplaced talar neck fractures have been applied by some authors. The aim of this paper is to assess the results and complications of this minimally invasive technique. MATERIAL AND METHODS In the period from 2009 to 2014, twenty-one patients with a talar neck fracture were observed after closed reduction and percutaneous screw fixation in the Traumatological Hospital in Brno. The mean age of the patients was 38 years (range 18-56 years)...
2017: Acta Chirurgiae Orthopaedicae et Traumatologiae Cechoslovaca
https://www.readbyqxmd.com/read/28808622/radiation-exposure-and-reduction-in-the-operating-room-perspectives-and-future-directions-in-spine-surgery
#15
REVIEW
Ankur S Narain, Fady Y Hijji, Kelly H Yom, Krishna T Kudaravalli, Brittany E Haws, Kern Singh
Intraoperative imaging is vital for accurate placement of instrumentation in spine surgery. However, the use of biplanar fluoroscopy and other intraoperative imaging modalities is associated with the risk of significant radiation exposure in the patient, surgeon, and surgical staff. Radiation exposure in the form of ionizing radiation can lead to cellular damage via the induction of DNA lesions and the production of reactive oxygen species. These effects often result in cell death or genomic instability, leading to various radiation-associated pathologies including an increased risk of malignancy...
July 18, 2017: World Journal of Orthopedics
https://www.readbyqxmd.com/read/28774707/2d-projection-based-software-application-for-mobile-c-arms-optimises-wire-placement-in-the-proximal-femur-an-experimental-study
#16
B Swartman, D Frere, W Wei, M Schnetzke, N Beisemann, H Keil, J Franke, P A Grützner, S Y Vetter
PURPOSE: A new software application can be used without fixed reference markers or a registration process in wire placement. The aim was to compare placement of Kirschner wires (K-wires) into the proximal femur with the software application versus the conventional method without guiding. As study hypothesis, we assumed less placement attempts, shorter procedure time and shorter fluoroscopy time using the software. The same precision inside a proximal femur bone model using the software application was premised...
July 25, 2017: Injury
https://www.readbyqxmd.com/read/28772395/customized-a-ti6al4v-bone-plate-for-complex-pelvic-fracture-by-selective-laser-melting
#17
Di Wang, Yimeng Wang, Shibiao Wu, Hui Lin, Yongqiang Yang, Shicai Fan, Cheng Gu, Jianhua Wang, Changhui Song
In pelvic fracture operations, bone plate shaping is challenging and the operation time is long. To address this issue, a customized bone plate was designed and produced using selective laser melting (SLM) technology. The key steps of this study included designing the customized bone plate, metal 3D printing, vacuum heat treatment, surface post-processing, operation rehearsal, and clinical application and evaluation. The joint surface of the bone plate was placed upwards with respect to the build platform to keep it away from the support and to improve the quality of the joint surface...
January 4, 2017: Materials
https://www.readbyqxmd.com/read/28771143/equivalent-uniform-square-field-sizes-of-flattening-filter-free-photon-beams
#18
Wolfgang Lechner, Peter Kuess, Dietmar Georg, Hugo Palmans
Various types of treatment units, such as CyberKnife, TomoTherapy and C-arm linear accelerators (LINACs) are operated using flattening filter free (FFF) photon beams. Their reference dosimetry, however, is currently based on codes of practice that provide data which were primarily developed and tested for high-energy photon beams with flattening filter (WFF). The aim of this work was to introduce equivalent uniform square field sizes of FFF beams to serve as a basis of a unified reference dosimetry procedure applicable to all aforementioned FFF machines...
September 15, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28768918/advantages-and-disadvantages-of-multi-axis-intraoperative-angiography-unit-for-percutaneous-pedicle-screw-placement-in-the-lumbar-spine
#19
Hiroto Kageyama, Shinichi Yoshimura, Kazutaka Uchida, Tomoko Iida
We analyzed clinical usefulness of the high resolution imaging system in a hybrid operation room (OR) for posterior lumbar interbody fusion. A total of 17 patients with lumbar spondylolisthesis between February 2014 and August 2016 were included. Multi-axis imaging system in a hybrid OR was used in 12 patients (hybrid OR group); the conventional C-arm fluoroscopy, in 5 patients (C-arm group). The time to confirm the first percutaneous pedicle screw (PPS) angle (hybrid OR, 80 vs C-arm, 249 s; P = 0.0026) and the second to the last PPS angle (77 vs 90 s; P = 0...
August 1, 2017: Neurologia Medico-chirurgica
https://www.readbyqxmd.com/read/28768868/the-asymmetric-trimeric-ring-structure-of-the-nucleocapsid-protein-of-tospovirus
#20
Keisuke Komoda, Masanori Narita, Keitaro Yamashita, Isao Tanaka, Min Yao
Tomato spotted wilt virus (TSWV), belonging to the genus Tospovirus of the family Bunyaviridae, causes significant economic damage in several vegetables and ornamental plants worldwide. Similar to that in all other negative-strand RNA viruses, the nucleocapsid (N) protein plays very important roles in their viral life cycle. N proteins protect genomic RNAs by encapsidation and form a viral ribonucleoprotein complex (vRNP) with some RNA-dependent RNA polymerases. Here we show the crystal structure of the N protein from TSWV...
August 2, 2017: Journal of Virology
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