scholarly journals Visualizing Orbital Content of Electronic Bands in Anisotropic 2D Semiconducting ReSe2

ACS Nano ◽  
2020 ◽  
Vol 14 (7) ◽  
pp. 7880-7891
Author(s):  
Byoung Ki Choi ◽  
Søren Ulstrup ◽  
Surani M. Gunasekera ◽  
Jiho Kim ◽  
Soo Yeon Lim ◽  
...  
Keyword(s):  
Orbital Content

scholarly journals Oculocerebrocutaneous Syndrome (Delleman Syndrome): A Case with a Novel Presentation of Orbital Involvement

2021 ◽  
Vol 2021 ◽  
pp. 1-4
Author(s):  
Mahbobeh Bahmani ◽  
Razieh Naseri ◽  
Alireza Iraniparast ◽  
Raya Mokhtari ◽  
Seyed Hamed Jafari
Keyword(s):  
Central Nervous System ◽  
Nervous System ◽  
Brain Mri ◽  
Cerebellar Hemisphere ◽  
Solid Mass ◽  
Resonance Imaging ◽  
Orbital Cavity ◽  
Orbital Content ◽  
Pediatric Neurologist ◽  
The Right

Oculocerebrocutaneous syndrome (OCCS), also known as Delleman syndrome (DS), is a rare congenital anomaly featuring focal skin defects, orbital anomalies, and central nervous system malformations. Diagnosis of Delleman syndrome is based on the triad of eye, central nervous system (CNS), and cutaneous defects and confirmed by magnetic resonance imaging. A 23-day-old girl was referred to our department for brain imaging. The infant had multiple cutaneous appendages on the right side of her face. There also was a fleshy mass measuring about 12 mm over her right eye. Brain MRI demonstrated the evidence of colpocephaly, agenesis of the corpus callosum, nodular subependymal heterotopias adjacent to the right lateral ventricle, aplasia of the cerebellar vermis, hypoplasia of the right cerebellar hemisphere, and widening of CSF space in the posterior fossa. There was also an exophytic skin lesion on her right cheek, measuring about 13 × 12 mm in size. In the orbital MRI, there was a mixed cystic solid mass measuring about 25 × 20 mm in her right orbital cavity. The orbital content was abnormal and suggestive of rudimentary orbit. Considering the findings, diagnosis of oculocerebrocutaneous syndrome (Delleman syndrome) was established for the patient. Because of the variations in orbital and CNS manifestations, all patients with clinical suspicion of DS should be assessed by brain and orbital MRI and managed by a pediatric neurologist and ophthalmologist.

scholarly journals Orbital content and velocity fields of triaxial galaxies

1994 ◽  
Vol 271 (4) ◽  
pp. 924-948 ◽  
Author(s):  
R. Arnold ◽  
P. T. de Zeeuw ◽  
C. Hunter
Keyword(s):  
Velocity Fields ◽  
Orbital Content

scholarly journals Concealed d-wave pairs in the s± condensate of iron-based superconductors

2016 ◽  
Vol 113 (20) ◽  
pp. 5486-5491 ◽  
Author(s):  
Tzen Ong ◽  
Piers Coleman ◽  
Jörg Schmalian
Keyword(s):  
Angular Momentum ◽  
Fermi Surface ◽  
Coulomb Repulsion ◽  
Cooper Pairs ◽  
Iron Based Superconductors ◽  
Angle Resolved Photoemission Spectroscopy ◽  
Angular Momenta ◽  
Spin Singlet ◽  
Orbital Content ◽  
Iron Based

A central question in iron-based superconductivity is the mechanism by which the paired electrons minimize their strong mutual Coulomb repulsion. In most unconventional superconductors, Coulomb repulsion is minimized through the formation of higher angular momentum Cooper pairs, with Fermi surface nodes in the pair wavefunction. The apparent absence of such nodes in the iron-based superconductors has led to a belief they form an s-wave (s±) singlet state, which changes sign between the electron and hole pockets. However, the multiorbital nature of these systems opens an alternative possibility. Here, we propose a new class of s± state containing a condensate of d-wave Cooper pairs, concealed by their entanglement with the iron orbitals. By combining the d-wave (L=2) motion of the pairs with the internal angular momenta I=2 of the iron orbitals to make a singlet (J=L+I=0), an s± superconductor with a nontrivial topology is formed. This scenario allows us to understand the development of octet nodes in potassium-doped Ba1−x KXFe2As2 as a reconfiguration of the orbital and internal angular momentum into a high spin (J=L+I=4) state; the reverse transition under pressure into a fully gapped state can then be interpreted as a return to the low-spin singlet. The formation of orbitally entangled pairs is predicted to give rise to a shift in the orbital content at the Fermi surface, which can be tested via laser-based angle-resolved photoemission spectroscopy.

Intraventricular silicone oil

2013 ◽  
Vol 118 (5) ◽  
pp. 1127-1129 ◽  
Author(s):  
Chih-Chen Chang ◽  
Hong-Shiu Chang ◽  
Cheng Hong Toh
Keyword(s):  
Chemical Shift ◽  
Intraventricular Hemorrhage ◽  
Silicone Oil ◽  
Rare Complication ◽  
Surgical Removal ◽  
Contrast Enhanced ◽  
History Of ◽  
Orbital Content ◽  
The Right ◽  
Mri Study

The authors report a case in which intravitreous silicone oil migrated into the ventricles. They note that intraventricular silicone oil can be misdiagnosed as intraventricular hemorrhage and neurosurgeons should be aware of this possibility. This 58-year-old woman with a history of Type II diabetic mellitus and retinal detachment (resulting from diabetic retinopathy), which had been treated with intravitreous silicone tamponade, presented with dizziness and headache approximately 10 years after the intravitreous silicone treatment. Over the next 6 years she underwent 2 non–contrast-enhanced brain CT studies and 1 MRI study for evaluation of her symptoms. On CT scan, extension of the intraocular silicone along the optic nerve was evident. Two hyperdense nodules were observed freely floating in the right lateral and fourth ventricles, remaining in the nondependent portion of ventricles in both supine and prone positions. On T2-weighted MRI, the left orbital content and the intraventricular nodules all demonstrated chemical shift artifacts typically associated with silicone. The imaging findings were characteristic for intraventricular silicone after silicone oil tamponade. The patient's dizziness and headache were treated symptomatically and she was followed up at the outpatient department. Migration of intravitreous silicone oil into the cerebral ventricles is a rare complication. Intraventricular silicone oil can mimic intraventricular hemorrhage. Radiographically, intraventricular silicone oil can be distinguished from hemorrhage as silicone oil tends to stay in the nondependent portion of the ventricle. Chemical shift artifacts on MRI may help establishing the diagnosis of intraventricular silicone oil. Currently, there is no consensus on surgical removal of intraventricular silicone oil, and in the majority of cases reported in the literature, the patients were asymptomatic.

scholarly journals Cáncer palatosinusal t4a/b: extensión de las resecciones oncológicas

2019 ◽  
Vol 111 (2) ◽  
pp. 61-70
Author(s):  
David O. Simkin ◽  
◽  
Hugo A. Pardo ◽  
Alejandro Rubino ◽  
Osvaldo González Aguilar ◽  
...  
Keyword(s):  
Univariate Analysis ◽  
Disease Free Survival ◽  
Previous Treatment ◽  
Free Flaps ◽  
Soft Tissue Reconstruction ◽  
Muscle Flaps ◽  
Tissue Reconstruction ◽  
Orbital Content ◽  
Base Of The Skull ◽  
Disease Free

Background: the problems of reconstructive surgery for the midface are variable and can be very complex. The anatomical proximity of the midface to the orbit, base of the skull and maxillary sinuses is a challenge for the surgeon who must perform a curative resection. Objective: The aim of this presentation is to report the survival rate and disease-free interval in T4a and T4b neoplasms of the palate and paranasal sinuses consecutively resected over a 30-year period. Material and methods: Surgery was extended to the orbit in 85.2%, the skull in 8.3%, the neck in 18.7% and the parotid gland in 7.3%. Soft tissue reconstruction was performed using free flaps in 32.5%, muscle flaps in 21.6%, local flaps in 20.2%, musculocutaneous flaps in 14.7% and skin flaps in 11.3%. Results: Local and general complications were reported, and 4/203 patients (2%) died. At 5 years, overall survival was 62.5% and disease-free survival was 53%. Univariate analysis revealed that lack of previous treatment was significantly associated with recurrence and squamous cell carcinoma was a predictor of survival. Conclusions: The indication of exenteration is mandatory in the presence of ophthalmoplegia or involvement of the orbital content. Survival at 5 years is acceptable, considering the advanced stages of the disease. In some patients, previous treatments were

scholarly journals Accelerated Osteomesh Resorption: A Case Report

2010 ◽  
Vol 3 (3) ◽  
pp. 115-117 ◽  
Author(s):  
Samuel Y.M. Ho ◽  
Vigneswaran Nallanthamby ◽  
Marcus T.C. Wong
Keyword(s):  
Traffic Accidents ◽  
Road Traffic ◽  
Significant Proportion ◽  
Rectus Muscle ◽  
Orbital Floor ◽  
Surgical Reconstruction ◽  
Inferior Rectus ◽  
Orbital Floor Fractures ◽  
Orbital Content ◽  
Inferior Rectus Muscle

Facial fractures occur commonly as a result of blunt trauma from road traffic accidents, assaults, and sporting injuries. Orbital floor fractures form a significant proportion of these and when large enough, the defect often requires surgical reconstruction of the floor to prevent orbital content herniation. Here, we present a case of a 28-year-old gentleman, who sustained an orbital floor fracture from a soccer-related injury. The resulting floor defect was surgically repaired using an osteomesh that was hand-cut to size. He developed delayed enophthalmos and entrapment of the inferior rectus muscle due to early resorption of the osteomesh, requiring revision surgery.

Endonasal Access to the Orbital Floor for Blowout Fractures

2008 ◽  
Vol 139 (2_suppl) ◽  
pp. P30-P31
Author(s):  
Yasuyuki Hinohira ◽  
Atsushi Shiraishi ◽  
Naohito Hato ◽  
Masahiro Komori
Keyword(s):  
Fracture Site ◽  
Ocular Motility ◽  
Endoscopic Endonasal Approach ◽  
Endonasal Approach ◽  
Endoscopic Endonasal ◽  
Orbital Wall ◽  
Bone Fragments ◽  
Orbital Content ◽  
Supporting Material ◽  
Traction Test

Objective 1) Describe how to endonasally access the inferior orbital wall for the reduction surgery using endoscope. 2) Show the usefulness of the endoscopic endonasal approach for alternative to the current approaches. Methods Between 1997 and 2007, 41 patients with isolated inferior blowout fractures not involving the medial wall underwent surgery. The surgical treatment was determined due to persisting diplopia for 2 to 4 weeks after the trauma. In 38 of the 41 patients the reduction surgery was completed using only the endoscopic endonasal approach. To achieve the endoscopic endonasal reduction surgery, via the middle nasal meatus, septoplasty was supplemented in 7 patients and sub-mucous conchotomy in 36. In 16 patients the inferior antrostomy was additionally required to reach the fracture site. The bone fragments entrapping the orbital content were carefully removed. An ophthalmologist verified the ocular motility improvement by eye traction test. No permanent supporting material except temporary balloon fixation was used. Results No surgical complications were encountered in any of the patients. Postoperatively, diplopia disappeared in 32 of the 35 patients (91.4%) followed over 6 months. No patients complained of postoperative buccal paresthesia or enophthalmos. Conclusions An endoscopic endonasal reduction surgery for isolated blowout fractures has so far been considered as technically difficult. Our procedure to access the inferior orbital wall comprise sinonasal surgery techniques that have been conventionally used. We conclude that the endoscopic endonasal approach can be an alternative to the extranasal methods because of safety and usefulness.

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