Search results for "focal"

Chronic neural probe for simultaneous recording of single-unit, multi-unit, and local field potential activity from multiple brain sites

2017

Drug resistant focal epilepsy can be treated by resecting the epileptic focus requiring a precise focus localisation using stereoelectroencephalography (SEEG) probes. As commercial SEEG probes offer only a limited spatial resolution, probes of higher channel count and design freedom enabling the incorporation of macro and microelectrodes would help increasing spatial resolution and thus open new perspectives for investigating mechanisms underlying focal epilepsy and its treatment. This work describes a new fabrication process for SEEG probes with materials and dimensions similar to clinical probes enabling recording single neuron activity at high spatial resolution.Polyimide is used as a bi…

Imaging approach for evaluation of focal liver lesions

2009

Focal liver lesions are common in the general population. Radiology (imaging) plays a pivotal role for the diagnosis, staging, treatment planning, and follow-up of focal liver lesions. To maximize lesion detection and characterization, imaging needs to be performed with appropriate equipment by using protocols carefully designed on the basis of the underlying clinical context. In addition, the decision of an imaging modality cannot be based on the diagnostic accuracy of an imaging test solely but must also consider patient safety and cost-effectiveness.

Characterization of focal liver lesions: contrast-enhanced US versus MDCT and MR

2008

Source Mechanisms of Laboratory Earthquakes During Fault Nucleation and Formation

2021

Identifying deformation and pre-failure mechanisms preceding faulting is key for fault mechanics and for interpreting precursors to fault rupture. This study presents the results of a new and robust derivation of first motion polarity focal mechanism solutions (FMS) applied to acoustic emission (AE). FMS are solved using a least squares minimization of the fit between projected polarity measurements and the deviatoric stress field induced by dilatational (T-type), shearing (S-type), and compressional (C-type) sources. 4 × 10 cm cylindrical samples of Alzo Granite (AG, porosity <1%) and Darley Dale Sandstone (DDS, porosity ≈14%) underwent conventional triaxial tests in order to investigat…

Imaging findings of hepatic Focal Nodular Hyperplasia (FNH) in Gadoxetic Acid vs Gadobenate Dimeglumine-enhanced MR: preliminary results

2009

Imaging findings of hepatic focal nodular hyperplasia in Gd-EOB-DTPA vs Gd-BOPTA -enhanced MR: preliminary results.

2009

Hepatic focal nodular hyperplasia: detection of spoke-wheel sign and central scar at contrast-enhanced ultrasound

2007

Towards higher sensitivity at the RITU focal plane

2001

The recently reconstructed focal plane detector system for the gas-filled recoil separator RITU was used to observe a new proton emitter 164Ir. The nuclide was produced via the p5n fusion evaporation channel using a 64Zn beam on a 106Cd target. The proton energy Ep = 1817(9) keV and half-life T1/2 = 113+62-30 μ s were used to characterize the decaying state to be [π h11/2 ν f7/2]9+. The new focal plane detector system and the results of the proton decay studies will be discussed. peerReviewed

Pràctica 4. Astigmatisme

2021

El document forma part dels materials docents programats mitjançant l'ajut del Servei de Política Lingüística de la Universitat de València Guió de la quarta pràctica de l'assignatura d'Òptica Fisiològica del Grau d'Òptica i Optometria de la Universitat de València Script of the fourth practice of Physiological Optics subject of the Optics and Optometry Degree of the University of Valencia

Effect of oxidoreduction potential and of gas bubbling on rheological properties and microstructure of acid skim milk gels acidified with glucono-del…

2009

Milk oxidoreduction potential was modified using gases during the production of a model dairy product and its effect on gel setting was studied. Acidification by glucono-delta-lactone was used to examine the physicochemistry of gelation and to avoid variations due to microorganisms sensitive to oxidoreduction potential. Four conditions of oxidoreduction potential were applied to milk: milk was gassed with air, nongassed, gassed with N(2), or gassed with N(2)H(2). The rheological properties and microstructure of these gels were determined using viscoelasticimetry, measurement of whey separation, and confocal laser scanning microscopy. It appeared that a reducing environment led to less-aggre…