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Orbital Ct Scan

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https://www.readbyqxmd.com/read/30335562/anatomic-variation-of-the-entrance-of-the-optic-canal-into-the-orbit
#1
Shoaib Ugradar, Robert Goldberg, Daniel Rootman
PURPOSE: To characterise variations in the location of the optic canal and its entry into the orbit in relation to the sphenoid sinus. METHODS: In this observational study, patients with high-resolution computed tomography (CT) scans seen by 2 specialists (RG and DR) over a period of 12 years were reviewed for study entry. The primary outcome measure was characterisation of the optic canal route in relation to the sphenoid sinus and the location of its opening within the orbit...
October 18, 2018: Orbit
https://www.readbyqxmd.com/read/30326441/targeted-nanoparticle-binding-detection-in-petroleum-hydrocarbon-impacted-porous-media
#2
Stuart Linley, Andrew Holmes, Timothy Leshuk, Wanis Nafo, Neil R Thomson, Adil Al-Mayah, Kevin McVey, Kanwartej Sra, Frank X Gu
Targeted nanoparticle binding has become a core feature of experimental pharmaceutical product design which enables more efficient payload delivery and enhances medical imaging by accumulating nanoparticles in specific tissues. Environmental remediation and geophysical monitoring encounter similar challenges which may be addressed in part by the adoption of targeted nanoparticle binding strategies. This study illustrates that engineered nanoparticles can bind to crude oil-impacted silica sand, a selective adsorption driven by active targeting based on an amphiphilic polymer coating...
October 8, 2018: Chemosphere
https://www.readbyqxmd.com/read/30319827/occult-orbital-injury-with-dagger-fragment-with-resulting-pneumocephalus
#3
Lucía Jáñez-García, Enrique Mencía-Gutiérrez, Esperanza Gutiérrez-Díaz, Luis F Moreno-García-Rubio, Laura Zarratea-Herreros, Álvaro Bengoa-González, Silvia Pérez-Trigo
Penetrating injuries of the cranium are relatively uncommon, only 0.4% of all head injuries. In patients with disturbed conscious level, an extensive examination should be performed in the emergency unit to rule out transorbital penetrating brain injury. A 25-year-old male was attacked with a dagger. He presented with ethylic intoxication and the physical examination demonstrated a small skin injury on the lateral canthus of the left eye with a large periocular hematoma which prevented eyelid opening. Cranial CT scan showed a metallic intraorbital foreign body consisting of a fragment of a dagger which perforated the eyeball, and penetrated through the superomedial wall of the orbit into the anterior cranial fossa...
2018: Case Reports in Ophthalmological Medicine
https://www.readbyqxmd.com/read/30310843/application-of-three-dimensional-printing-technology-in-orbital-floor-fracture-reconstruction
#4
Sherby Suet Ying Pang, Christian Fang, Jimmy Yu Wai Chan
Importance: Orbital floor fracture is common among patients suffering from facial trauma. Open reduction and reconstruction of the orbital floor with Medpor is the treatment of choice in our centre to correct diplopia and enophthalmos. Objective: Application of locally available 3D printing service in perioperative planning of orbital floor reconstruction with porous polyethylene. Design: We present two patients who suffered from orbital floor fracture complicated by diplopia...
October 2018: Trauma case reports
https://www.readbyqxmd.com/read/30289825/low-flow-orbital-venous-malformation-masquerading-as-rhabdomyosarcoma
#5
Saagar A Pandit, Kyle J Godfrey, Kristen E Dunbar, Ashley A Campbell, Michael Kazim
A 15-month-old male was referred for biopsy of presumed rhabdomyosarcoma in the setting of rapidly progressing left-sided proptosis. Examination revealed left periorbital edema and left hypoglobus. MRI revealed a soft-tissue density mass within the left lateral retrobulbar space. Several days later, he developed acute periorbital ecchymosis and increasing edema. With high suspicion for a vascular lesion, a CT scan was performed with dynamic arterial and venous imaging. Central filling was noted in the lateral retrobulbar component with increased enhancement on delayed venous imaging in the middle cranial fossa component favoring the diagnosis of a low-flow orbital venous malformation...
September 27, 2018: Ophthalmic Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/30287407/development-and-validation-of-an-optimized-finite-element-model-of-the-human-orbit
#6
J M Foletti, V Martinez, N Graillon, Y Godio-Raboutet, L Thollon, L Guyot
INTRODUCTION: The authors' main purpose was to develop a detailed finite element model (FEM) of the human orbit and to validate it by analyzing its behavior under the stress of blunt traumas. MATERIALS AND METHODS: A pre-existing 3D FEM of a human head was modified and used in this study. Modifications took into account preliminary research carried out on PubMed database. Data from a CT scan of the head were computed with Mimics® software to re-create the skull geometry...
October 1, 2018: Journal of Stomatology, Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/30270483/location-and-volume-of-mri-artifacts-in-patients-with-implanted-sphenopalatine-ganglion-neurostimulators-for-treatment-of-chronic-cluster-headache
#7
Martin Jakobs, Jessica Jesser, Tobias Albrecht, Antje Wick, Andreas Unterberg, Rezvan Ahmadi
INTRODUCTION: Sphenopalatine ganglion stimulation (SPG-S) is an invasive form of neuromodulation by which a neurostimulator is implanted into the pterygopalatine fossa to treat refractory chronic cluster headache. The implant is MRI conditional, up to 3 T, however there is no clinical data on the shape, size, and location of the artifact produced by the implant. MATERIALS AND METHODS: Records of patients with SPG-S were analyzed for postoperative cranial MRI scans...
September 30, 2018: Neuromodulation: Journal of the International Neuromodulation Society
https://www.readbyqxmd.com/read/30267706/enophthalmos-and-orbital-volume-changes-in-zygomaticomaxillary-complex-fractures-is-there-a-correlation-between-them
#8
Ali Ebrahimi, Mohammad Hosein Kalantar Motamedi, Hamid Reza Rasouli, Navid Naghdi
PURPOSE: The orbital cavity can be affected in zygomaticomaxillary complex (ZMC) fractures. The aim of this study was to assess the relation between orbital volume changes and enophthalmos in patients with ZMC fractures. MATERIALS AND METHODS: A descriptive study of consecutive adult patients with recent isolated unilateral ZMC fractures who were otherwise healthy was performed from 2016 through 2017. Multislice computed tomographic (CT) scans were taken of all patients and enophthalmos was measured clinically using a Hertel exophthalmometer...
September 3, 2018: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/30247211/a-case-of-radioactivity-concentrated-in-orbital-implant-in-99mtc-mdp-bone-scan-and-spect-ct
#9
Min Cai, Guisheng Feng, Guangwei Zhang
A 27-year-old woman, who has received a hydroxyapatite orbital implant in the right eye due to a trauma 6 years ago, was newly diagnosis with left breast invasive ductal carcinoma. Tc-MDP bone scan showed an increased radiotracer accumulation in the right orbit and SPECT/CT confirmed the focal accumulation at the site of the implant, without any sign of local malignant lesions or orbital infection. Radionuclide imaging could provide certain useful information in diagnosing or differential diagnosing orbital disease...
September 21, 2018: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/30234716/normative-data-of-the-interorbital-distance-in-thai-population
#10
Chalermpong Chatdokmaiprai, Kidakorn Kiranantawat, Panuwat Lertsithichai, Patamintita Taeshineetanakul
The incidence of the patients with craniofacial anomalies was high in southeast-Asian countries, for example, fronto-ethmoidal encephalo-menigocele or craniosynostosis. These craniofacial anomalies usually involve orbits, so a surgical orbital reconstruction is always required.Various methods have been used in the past to indirectly analyze the craniofacial region. Plain skull radiography, anthropometry, and cephalometry provided the limited information of interorbital distance in terms of accuracy whereas the interorbital distance is crucial to be reconstructed, increasing or decreasing...
October 2018: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/30226524/projectile-blunt-or-sharp-force-trauma-a-facial-lesion-on-a-bronze-age-skull-from-uglemose-denmark
#11
Larissa Collier, Chiara Villa
This study presents and discusses the differential diagnosis of a unique case of facial trauma. The adult male skull was excavated in 1948 from Uglemose (Owl Bog) outside of Birket, on the island of Lolland (Denmark). Carbon-14 samples from an adult tibia excavated with the skull dates to the end of the Danish Bronze Age and transition period into the pre-Roman Iron Age. The skull shows a traumatic ante-mortem lesion to the left maxilla, directly below the orbit, that opens into the maxillary sinus. The left margin of the injury is slightly rounded and angled into the lesion while the right margin is pulled out from the lesion and has a much sharper border, suggesting a directional force from left to right...
September 18, 2018: Anthropologischer Anzeiger; Bericht über die Biologisch-anthropologische Literatur
https://www.readbyqxmd.com/read/30192913/three-dimensional-computed-tomographic-study-on-the-periorbital-branches-of-the-ophthalmic-artery-arterial-variations-and-clinical-relevance
#12
Wei-Rui Zhao, Hai-Bin Wang, Cheng-En Luo, Xiang-Xue Kong, Wen-Feng Zhan, Sheng-Kang Luo
Background: Filler injection is a popular cosmetic procedure, but it can entail vascular complications. Periorbital injections have the highest risk among all the injection area. Objectives: To systematically screen for periorbital arterial variations prior to treatment. Methods: The external carotid arteries of 10 cadaveric heads were infused with adequate lead oxide contrast. The facial and superficial temporal arteries of another 11 cadaveric heads were injected with the contrast in sequential order...
September 5, 2018: Aesthetic Surgery Journal
https://www.readbyqxmd.com/read/30192295/oculocardiac-reflex-as-a-late-presentation-of-orbital-floor-fracture
#13
Berkay Başağaoğlu, Ashley Steinberg, Irene T Tung, Shola Olorunnipa, Renata S Maricevich
Delayed repair of orbital trapdoor fractures can jeopardize the viability of entrapped contents and prolong recovery. Variation in presentations, both clinically and radiographically, complicate prompt diagnosis. The oculocardiac reflex may be the only indication of fracture with entrapped orbital contents, but, unfortunately, the reflex has variable onset patterns and can mimic common diagnoses. Therefore, the authors present the case of a 14-year-old male with a right orbital floor fracture, who presented with delayed symptoms secondary to an oculocardiac reflex...
October 2018: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/30146694/combined-positron-emission-tomography-computed-tomography-for-diagnosis-and-monitoring-of-orbital-adnexal-lymphoma
#14
Annemarie Klingenstein, Aylin Garip-Kuebler, Ullrich G Mueller-Lisse, Christoph Hintschich
PURPOSE: Combined whole-body F-18-fluoro-2-deoxyglucose positron emission tomography / computed tomography ([18F]FDG-PET/CT) gives precise information about tumour morphology and metabolism. The standardized uptake value (SUV) allows quantification of tumour metabolism. The diagnostic value of PET/CT in patients with suspected orbital adnexal lymphoma (OAL) was evaluated. METHODS: Of 21 patients with suspected OAL who underwent combined whole-body PET/CT between 07/2002 and 11/2016, 16 were scanned before and five after orbital biopsy...
August 26, 2018: Acta Ophthalmologica
https://www.readbyqxmd.com/read/30139884/bilateral-orbital-soft-tissue-metastases-from-renal-neuroendocrine-tumor-successful-theranostic-application-of-68-ga-177-lu-dotatate-with-improvement-of-vision
#15
Rahul Vithalrao Parghane, Sandip Basu
Gratifying clinical response obtained in the clinical setting of bilateral orbital metastases from renal neuroendocrine tumor (NET) is reported. Methods: A 53 year-old male, diagnosed case of renal NET (MIB1 index-4%), with symptoms of skeletal and abdominal pain, proptosis and decrease in vision of left eye, was found to harbor bilateral orbital soft tissue lesions on 68 Ga-DOTATATE PET-CT and MRI in addition to widespread metastatic skeletal lesions, and metastatic lymph nodal disease. His symptoms worsened despite radiotherapy to left eye (20Gy) and long-acting octreotide therapy for 18 months, with increase in serum chromogranin A (CgA) level and was considered for 177 Lutetium(Lu)-DOTATATE peptide receptor radionuclide therapy (PRRT)...
August 23, 2018: Journal of Nuclear Medicine Technology
https://www.readbyqxmd.com/read/30137039/-orbital-hemangiomas-capabilities-of-modern-neuroradiological-diagnostics
#16
I N Shchurova, I N Pronin, T V Mel'nikova-Pitskhelauri, N K Serova, N N Grigor'eva, L M Fadeeva, L V Shishkina
MATERIAL AND METHODS: In the period from 2010 to 2016. 14 patients with cavernous hemangioma (CH) and 2 patients with capillary hemangioma (CapH) of the orbit were examined. The age of CH patients varied from 17 to 67 years (median, 53 years); 8 females and 6 males. The age of CapH patients was 35 and 54 years. All patients underwent surgery with subsequent histological verification. CT-perfusion was performed in 10 CH patients and 2 CapH patients according to a developed low-dose protocol (80 kV, 200 mAs, tscan =40 s) with allowance for a target localizer (80 kV, 120 mAs) and at a maximum radiation dose of not more than 4...
2018: Zhurnal Voprosy Neĭrokhirurgii Imeni N. N. Burdenko
https://www.readbyqxmd.com/read/30124604/predominant-contribution-of-superior-rectus-levator-complex-enlargement-to-optic-neuropathy-and-inferior-visual-field-defects-in-thyroid-eye-disease
#17
Susel Oropesa, Kristen E Dunbar, Kyle J Godfrey, Alison B Callahan, Ashley A Campbell, Michael Kazim
PURPOSE: To compare extraocular muscle volumes in thyroid eye disease patients with and without compressive optic neuropathy. METHODS: A retrospective review of 44 orbital CT scans (28 orbits without compressive disease and 16 orbits with compressive optic neuropathy) was conducted. The extraocular muscle volumes, summated soft tissue volumes, and optic nerve volumes were calculated at a section in the posterior 1/3 of the orbit. The visual fields of the orbits with compressive optic neuropathy were analyzed...
August 17, 2018: Ophthalmic Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/30119794/comparison-of-exophthalmos-measurements-hertel-exophthalmometer-versus-orbital-parameters-in-2-dimensional-computed-tomography
#18
Kyung Jun Choi, Min Joung Lee
OBJECTIVE: To compare the reliability of orbital parameters calculated using 2-dimensional computed tomography (CT) and Hertel exophthalmometry when measuring exophthalmos in normal subjects and in patients with thyroid-associated orbitopathy (TAO). DESIGN: Retrospective, observational case series. PARTICIPANTS: CT images of 33 normal orbits and 69 orbits with TAO were included. METHODS: In central axial CT scans, globe area (GA), orbital area (OA), and GA/OA ratio were calculated by 2 observers using ImageJ...
August 2018: Canadian Journal of Ophthalmology. Journal Canadien D'ophtalmologie
https://www.readbyqxmd.com/read/30112271/lung-adenocarcinoma-presenting-with-an-orbital-metastasis
#19
Noni Novisari Soeroso, Setia Putra Tarigan, Wina Saragih, Novie Diana Sari, Netty Lubis, Humairah Lubis
Orbital metastasis of lung adenocarcinoma is very rare. The incidence is only found to be approximately 7%-12% of lung cancer cases. The lack of knowledge about orbital metastasis results in misdiagnosis between malignant or benign lesion. This was a case of a 39-year-old woman complaining about a protruding left eye and a blind pain in the left eye characterized by hyperemesis eyeball. A CT scan of the orbital showed a soft tissue tumor in the fronto-naso-superomedial area of the left orbital with suspicion of infiltration of the medial rectus muscle, left bulbus oculi, lamina papyracea, and left frontal sinus wall which causes proptosis and soft tissue tumor in the left temporal region with suspicion of infiltration in the left sphenoid wing with an impression of metastasis...
2018: Respiratory Medicine Case Reports
https://www.readbyqxmd.com/read/30093462/eosinophilic-angiocentric-fibrosis-a-sino-orbital-masquerader
#20
Nicole Legare, Seema Frosh, Jonathan B Vasquez, Son T Ho
A 58-year-old Caucasian male presented with left periorbital oedema extending to the nasal area for 1 year along with nasal discharge for 1 month. Lab work was significant for positive cytoplasmic antineutrophil cytoplasmic antibodies. CT scan showed solid mass along the nasal soft tissue with bony nasal destruction. A CT scan of the thorax was performed to rule out granulomatosis with polyangiitis and showed multiple pulmonary nodules. Biopsies of the nasal mass and lung nodule were performed which showed fragments of fibrosis with spindle cell proliferation consistent with eosinophilic angiocentric fibrosis (EAF)...
August 9, 2018: BMJ Case Reports
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