Selective enhancement of H signal from water and oil in porous media at low field with Overhauser DNP.

In porous media MR studies, discriminating between oil and water presents a challenge because MR lifetimes are often similar and spectra overlap. Low saturations might suggest an experimental strategy of increasing the static field for increased sensitivity, but susceptibility effects are exacerbated at higher field. Overhauser dynamic nuclear polarization, effective at low static field, was employed with water and oil-soluble nitroxide to selectively enhance water and oil signals.

Magnetic expression in kerogen reveals impact on fluid transport.

How can the transport of fluids in a confined and complex mixed organic/inorganic matrix be far below the expected value from a topological aspect? A good example of this situation is oil shales. Oil and gas shales are source rocks in which organic matter has matured to form hydrocarbons. They exhibit a dual porous network formed by the intertwining of mineral and organic pores that leads to very low permeability.

Hangman's fracture: Management strategy and healing rate in a prospective multi-centre observational study of 34 patients.

Background: Hangman's fractures account for 15% to 20% of all cervical spine fractures. The grading system developed by Effendi and modified by Levine and Edwards is generally used as the basis for management decisions. Nonetheless, the optimal management remains controversial.

Mortality, complication, and fusion rates of patients with odontoid fracture: the impact of age and comorbidities in 204 cases.

Purpose: The French Society of Spine Surgery (SFCR) conducted a prospective epidemiologic multicenter study. The purpose was to investigate mortality, complication, and fusion rates in patients with odontoid fracture, depending on age, comorbidities, fracture type, and treatment.

Methods: Out of 204 patients, 60 were ≤ 70 years and 144 were > 70 years.

C1 fracture: Analysis of consolidation and complications rates in a prospective multicenter series.

Introduction: Three types of C1 fracture have been described, according to location: type 1 (anterior or posterior arc), type 2 (Jefferson: anterior and posterior arc), and type 3 (lateral mass). Stability depends on transverse ligament integrity. The main aim of the present study was to analyze complications and consolidation rates according to fracture type, age and treatment.

Facet joint syndrome: from diagnosis to interventional management.

Low back pain (LBP) is the most common pain syndrome, and is an enormous burden and cost generator for society. Lumbar facet joints (FJ) constitute a common source of pain, accounting for 15-45% of LBP. Facet joint degenerative osteoarthritis is the most frequent form of facet joint pain.

Greater occipital nerve cryoneurolysis in the management of intractable occipital neuralgia.

Objective: To assess technical feasibility of cryoneurolysis of the greater occipital nerve in the management of occipital neuralgia.

Methods: Six patients suffering from unilateral refractory greater occipital neuralgia and who underwent 7 GON cryoneurolysis were assessed between October 2015 and January 2017. All procedures were performed under CT guidance and local anesthesia.

Effect of surgery on periventricular white matter in normal pressure hydrocephalus patients: comparison of two methods of DTI analysis.

Background: Diffusion tensor imaging (DTI) is a useful tool for assessing changes that occur in microstructures. We have developed a novel method for region of interest (ROI) delineation in the assessment of DTI parameters in patients with normal pressure hydrocephalus (NPH).

Purpose: To compare the standard method and our novel method in an evaluation of the impact of surgery on periventricular white matter in patients with NPH.

Bilateral abducens paralysis revealing bipartite spheno-occipital synchondrosis fracture in a child: case based update.

Background: After reviewing the literature about sella turcica and spheno-occipital synchondrosis fracture, we present the case of a 6-year-old girl who suffered complex sphenoid bone fracture produced by an indirect mechanism.

Methods: The girl fell from her height after a blunt head injury due to a falling lamppost.

Results: Computer tomography (CT) scan showed occipital, sellar and clival fractures with pneumatocephalus.