Using dynamic maneuvers in the computed tomography/magnetic resonance assessment of lesions of the head and neck.
Despite advances in technology, the radiologic assessment of certain head and neck lesions may still pose difficulties because of the complex anatomy of this region, the small and mobile structures that this region harbors, and the apposition of mucosal surfaces in the neutral position. Certain maneuvers have been described in the literature to overcome these difficulties. We review the use of the Valsalva and the modified Valsalva maneuver, the puffed-cheek technique, phonation, and inspiration, with possible applications in head and neck imaging.policy tool to date to deal with the emissions, and ranks just behind the US and Australia in the table of worst global emitters per capita.

This is because of Canada's size, its cold climate and its resource-based economy, especially the energy-intensive, carbon-emissions-heavy oil boiled from large swaths of bitumen know as the Alberta tar sands.

Canada holds the world's third-largest oil reserves, mostly concentrated in the western province of Alberta, the region that is the largest emitter of greenhouse gases. Where most provinces' GHG emissions have stabilised since 1990, Alberta's emissions have increased by 41%.

The cornerstone of Prime Minister Stephen Harper's policy has been to try to approve key pipelines, such the Keystone XL, from Alberta to Texas, the Enbridge Northern Gateway, from Alberta to the West Coast, and