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https://www.readbyqxmd.com/read/28091696/radiation-dose-reduction-in-parasinus-ct-by-spectral-shaping
#1
Matthias S May, Michael Brand, Michael M Lell, Martin Sedlmair, Thomas Allmendinger, Michael Uder, Wolfgang Wuest
INTRODUCTION: Spectral shaping aims to narrow the X-ray spectrum of clinical CT. The aim of this study was to determine the image quality and the extent of radiation dose reduction that can be achieved by tin prefiltration for parasinus CT. METHODS: All scans were performed with a third generation dual-source CT scanner. A study protocol was designed using 100 kV tube voltage with tin prefiltration (200 mAs) that provides image noise levels comparable to a low-dose reference protocol using 100 kV without spectral shaping (25 mAs)...
January 16, 2017: Neuroradiology
https://www.readbyqxmd.com/read/28081326/the-effect-of-deep-sclerectomy-on-ocular-blood-flow-a-6-month-clinical-trial
#2
Arzu Özsoy, Murat Sinan Sarıcaoğlu, Mehtap Çavuşoğlu
BACKGROUND/AIM: To investigate the effect of deep sclerectomy on retrobulbar blood flow. MATERIALS AND METHODS: This prospective study included 20 eyes of 20 patients with open angle glaucoma. Color Doppler imaging (CDI) examinations were performed before and 2, 12, and 24 weeks after deep sclerectomy. Peak systolic velocity (PSV), end diastolic velocity (EDV), and resistance index (RI) were measured for the ophthalmic artery (OA), central retinal artery (CRA), and temporal and nasal short posterior ciliary arteries (SPCAs) at each examination and the results were compared...
December 20, 2016: Turkish Journal of Medical Sciences
https://www.readbyqxmd.com/read/28060246/unsuspected-conjunctival-orbital-dermoid-cyst-aids-in-diagnosis
#3
Frederick A Jakobiec, Fouad R Zakka, Alice Lorch
A 25-year-old man with Type 1 diabetes mellitus experienced rapid visual decline and was scheduled for right cataract surgery. At the time of administering an inferotemporal retrobulbar block, a white discharge appeared spontaneously on the surface of the globe. Superotemporally a cyst was found and its contents were subtotally evacuated. Microscopically, eosinophilic, acellular material with chatter artifact and small vacuoles was detected and initially thought to represent a lens choristoma. This material stained moderately with the periodic acid Schiff method and was focally Congo red positive without apple green birefringence; it also stained blue with the Masson trichrome method...
January 5, 2017: Ophthalmic Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28050807/radiotherapy-for-the-treatment-of-thyroid-eye-disease-a-prospective-comparison-is-orbital-radiotherapy-a-suitable-alternative-to-steroids
#4
P Grassi, D Strianese, R Piscopo, R Pacelli, G Bonavolontà
BACKGROUND AND AIMS: To evaluate the efficacy of orbital radiotherapy (OR) for the treatment of thyroid eye disease (TED). METHODS: Thirty-five consecutive patients with active TED with contraindications to steroid therapy received a course of OR. Bilateral retrobulbar irradiation was performed with a total dose of 20 Gy. 7-points clinical activity score (7-CAS), ocular motility, visual acuity (VA), exophthalmos and eyelid retraction were prospectively evaluated at 3, 6 and 12 months and compared with baseline data...
January 3, 2017: Irish Journal of Medical Science
https://www.readbyqxmd.com/read/28009349/reply-to-comment-on-effect-of-smoking-on-retrobulbar-blood-flow-in-thyroid-eye-disease
#5
A Sadeghi-Tari, M Jamshidian-Tehrani, A Nabavi, S Sharif-Kashani, E Elami, N Hassanpour, K A Zamani
No abstract text is available yet for this article.
December 23, 2016: Eye
https://www.readbyqxmd.com/read/28008696/sub-tenon-s-injection-in-equine-cadaver-eyes-mri-visualization-of-anesthetic-fluid-distribution-and-comparison-of-two-different-volumes
#6
Silvia Stadler, Matthias Dennler, Udo Hetzel, Francesca Del Chicca, Sèamus Hoey, Bernhard M Spiess, Katrin Voelter, Simon A Pot
OBJECTIVE: To compare the localization and distribution of two different anesthetic fluid volumes around equine cadaver eyes to determine an appropriate volume for a single sub-Tenon's injection in horses. PROCEDURE: A single sub-Tenon's injection of 2% lidocaine was performed in 10 equine cadaver heads (20 eyes) using two different volumes (7 mL on one side and 10 mL on the opposite side). The posterior circular distribution of the anesthetic was quantified in sagittal, dorsal, and transverse MRI (T2W-TSE) sequences and evaluated independently by three board-certified radiologists...
December 23, 2016: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/28002113/techniques-for-learning-descemet-membrane-endothelial-keratoplasty-for-eyes-of-asian-patients-with-shallow-anterior-chamber
#7
Takahiko Hayashi, Itaru Oyakawa, Naoko Kato
PURPOSE: To describe several essential surgical techniques that overcome difficulties in performing Descemet membrane endothelial keratoplasty (DMEK) for inexperienced surgeons, especially those who perform DMEK on eyes of Asian patients. METHODS: Nine eyes of 9 Asian patients with bullous keratopathy who underwent DMEK were analyzed retrospectively. All patients were given a diuretic such as D-mannitol or acetazolamide shortly before surgery, with retrobulbar anesthesia and a Nadbath facial nerve block...
January 4, 2017: Cornea
https://www.readbyqxmd.com/read/27996187/gasserian-ganglion-and-retrobulbar-nerve-block-in-the-treatment-of-ophthalmic-postherpetic-neuralgia-a-case-report
#8
Jie Huang, Ni Zhongge, Philip Finch
OBJECTIVES: Varicella-zoster virus reactivation can cause permanent histological changes in the central and peripheral nervous system. Neural inflammatory changes or damage to the dorsal root ganglia sensory nerve fibers during reactivation can lead to postherpetic neuralgia (PHN). For PHN of the first division of the fifth cranial nerve (ophthalmic division of the trigeminal ganglion), there is evidence of inflammatory change in the ganglion and adjacent ocular neural structures. First division trigeminal nerve PHN can prove to be difficult and sometimes even impossible to manage despite the use of a wide range of conservative measures, including anticonvulsant and antidepressant medication...
December 20, 2016: Pain Practice: the Official Journal of World Institute of Pain
https://www.readbyqxmd.com/read/27990593/is-the-unaffected-eye-really-unaffected-color-doppler-ultrasound-findings-in-unilaterally-active-central-serous-chorioretinopathy
#9
Iclal Erdem Toslak, Muhammet Kazim Erol, Devrim Toslak, Bulent Cekic, Mehtap Barc Ergun, Jennifer E Lim-Dunham
PURPOSE: To evaluate ocular hemodynamic changes using color Doppler ultrasonography imaging (CDI) with an emphasis on unaffected eyes of patients with central serous chorioretinopathy (CSC). METHODS: Twenty-seven patients with active CSC and 25 controls were analyzed using spectral domain-optical coherence tomography (SD-OCT) and CDI for choroidal imaging and evaluation of retrobulbar vessels, respectively. RESULTS: Resistive index (RI), pulsatility index (PI), and peak systolic velocity (PSV) of the ophthalmic artery (OA) and PSV, end-diastolic velocity (EDV), and mean velocity (Vmean) of the central retinal artery (CRA) in the patient group were less than those in the control group...
December 18, 2016: Journal of Medical Ultrasonics
https://www.readbyqxmd.com/read/27983730/comment-on-effect-of-smoking-on-retrobulbar-blood-flow-in-thyroid-eye-disease
#10
S Çalışkan, M Acar, C Gürdal
No abstract text is available yet for this article.
December 16, 2016: Eye
https://www.readbyqxmd.com/read/27956327/retrobulbar-chlorpromazine-in-management-of-painful-eye-in-blind-or-low-vision-patients
#11
A Ortiz, V Galvis, A Tello, J J Miro-Quesada, R Barrera, M Ochoa
OBJECTIVE: To evaluate the results of applying retrobulbar chlorpromazine in the management of patients with painful blind eyes or with very poor vision. METHODS: A retrospective, descriptive review was carried out on the medical records of 33 patients who were treated with a retrobulbar injection of chlorpromazine (25mg) for the management of painful blind eyes in Centro Oftalmológico Virgilio Galvis. RESULTS: Pain control was achieved in 90% of cases (with mean follow-up of 2...
December 7, 2016: Archivos de la Sociedad Española de Oftalmología
https://www.readbyqxmd.com/read/27938982/retrobulbar-hemorrhage-and-prasugrel
#12
Kanwal S Matharu, Stacy V Smith, Andrew G Lee
No abstract text is available yet for this article.
December 2016: Canadian Journal of Ophthalmology. Journal Canadien D'ophtalmologie
https://www.readbyqxmd.com/read/27933376/percutaneous-biopsy-of-retrobulbar-masses-anatomical-considerations-and-mri-guidance
#13
Faramarz Edalat, Roberto Luigi Cazzato, Julien Garnon, Georgia Tsoumakidou, Gerlinde Avérous, Jean Caudrelier, Guillaume Koch, Afshin Gangi
PURPOSE: Obtaining adequate tissue from retrobulbar masses remains a challenge. To this end, a new method of retrobulbar mass biopsy using MRI guidance is presented. MATERIALS AND METHODS: Two patients (7- and 71-year-old male) with indeterminate retrobulbar masses underwent bioptic and cytological samplings using MR-compatible 18G and 20-22G needles, and multi-planar MR fluoroscopy. An inferior approach was taken to avoid injury to the optic nerve and ophthalmic arteries...
December 8, 2016: Cardiovascular and Interventional Radiology
https://www.readbyqxmd.com/read/27930785/metallic-foreign-body-trapped-within-the-retrobulbar-part-of-the-optic-nerve
#14
Reema Bansal, Pallavi Singh, Sandeep Bansal
No abstract text is available yet for this article.
December 8, 2016: JAMA Ophthalmology
https://www.readbyqxmd.com/read/27906852/fenestration-of-solid-orbital-implants-reducing-retrobulbar-hematoma-rate
#15
Scott J Farber, Jenny L Yu, Dennis C Nguyen, Albert S Woo
PURPOSE: Retrobulbar hematoma is an uncommon but potentially devastating complication following repair of orbital fractures. Since 2007, the senior author routinely fenestrates the solid porous polyethylene implants commonly used for orbital reconstruction. The perforated implant may facilitate drainage of postoperative bleeding and may potentially reduce the risk of retrobulbar hematoma. This study examines the rates of retrobulbar hematoma in patients who underwent orbital fracture reconstruction with placement of fenestrated or nonfenestrated implants...
November 30, 2016: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/27904503/stem-cell-ophthalmology-treatment-study-scots-bone-marrow-derived-stem-cells-in-the-treatment-of-leber-s-hereditary-optic-neuropathy
#16
Jeffrey N Weiss, Steven Levy, Susan C Benes
The Stem Cell Ophthalmology Treatment Study (SCOTS) is currently the largest-scale stem cell ophthalmology trial registered at ClinicalTrials.gov (identifier: NCT01920867). SCOTS utilizes autologous bone marrow-derived stem cells (BMSCs) to treat optic nerve and retinal diseases. Treatment approaches include a combination of retrobulbar, subtenon, intravitreal, intra-optic nerve, subretinal, and intravenous injection of autologous BMSCs according to the nature of the disease, the degree of visual loss, and any risk factors related to the treatments...
October 2016: Neural Regeneration Research
https://www.readbyqxmd.com/read/27893548/pressureless-orbital-decompression-for-myopic-proptosis
#17
Saul N Rajak, Richard A McGovern, Dinesh Selva
Orbital decompression surgery increases the orbital volume. It has rarely been used for proptosis of the large highly myopic globe. However, external decompression surgery carries significant risks because of the large thin-walled globe. The authors report the first use of endoscopic medial wall orbital decompression surgery in this setting to obviate the risk of globe pressure.Endoscopic medial wall decompression brought about a 4 mm reduction of proptosis, correction of exotropia and elimination of retrobulbar ache providing good symmetry with the fellow eye...
November 23, 2016: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/27889503/gamma-knife-radiosurgery-for-uveal-metastases-report-of-three-cases-and-a-review-of-the-literature
#18
William J Ares, Daniel Tonetti, Jenny Y Yu, Edward A Monaco, John C Flickinger, L Dade Lunsford
PURPOSE: Uveal metastases are ophthalmologic tumors that have historically been treated by fractionated external beam radiation therapy or invasive brachytherapy. The need for rapid response and less invasive management options led the authors to explore the use of Gamma Knife stereotactic radiosurgery (SRS) for this common problem. DESIGN: Interventional case series. METHODS: To prevent eye movement during the procedure, all 3 patients underwent a retrobulbar anesthetic block followed by magnetic resonance imaging to detect the target...
November 23, 2016: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/27882744/transpalpebral-exenteration-in-cattle-a-retrospective-study-of-115-cases
#19
Munashe Chigerwe, John A Angelos, Lisa Gamsjäeger, Meera C Heller
OBJECTIVE: To describe the indications for exenteration and complications associated with the procedure. ANIMALS STUDIED: 115 cattle. PROCEDURES: Medical records of cattle presented for unilateral exenteration evaluated at the University of California, Davis Veterinary Medical Teaching Hospital from January 1985 through December 2015 were reviewed. RESULTS: Median (range) age at presentation for all cattle was 6 (0.2-30) years...
November 24, 2016: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/27875090/clinical-computed-tomographic-magnetic-resonance-imaging-and-histologic-findings-associated-with-myxomatous-neoplasia-of-the-temporomandibular-joint-in-two-dogs
#20
Arana Parslow, David P Taylor, David J Simpson
CASE DESCRIPTION A 15-year-old neutered female mixed-breed dog (dog 1) and an 11-year-old neutered female Labrador Retriever (dog 2) were examined because of unilateral exophthalmus, third eyelid protrusion, and periorbital swelling that failed to respond to antimicrobial treatment. CLINICAL FINDINGS Both dogs underwent ultrasonographic, CT, and MRI examination of the head. In both dogs, advanced imaging revealed a poorly defined, peripherally contrast-enhancing, mucous-filled cystic mass that radiated from the temporomandibular joint and infiltrated the periorbital tissues and retrobulbar space...
December 1, 2016: Journal of the American Veterinary Medical Association
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