Doughnut

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Imaging adjective Referring to a targetoid lesion or radiodensity in which the central and peripheral fields are relatively more radiodense or darker that the middle field
noun The targetoid lesion or radiodensity itself
Surgery A sleeve of tissue excised after a major gastrointestinal tract resection, often of the distal colon, when a cancer extends close to the margin of the original segment
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References in periodicals archive ?
The application states: "The Paradise Circus redevelopment will thankfully open up pedestrian routes within and across this part of the city - all of which have long been burdened by the concrete collar created by the implementation of the 1960s ring road with its dual carriageway, retaining walls and other such barriers.
It is expected to draw interest from property developers because of its location on the edge of the giant regeneration scheme which will see the "concrete collar" of the ring road broken.
And some of his plans, such as introducing the controversial inner ring road - a concrete collar which is now viewed as one of the biggest planning mistakes of the 20th century - can be seen in some dramatic aerial photographs published in a new book by English Heritage.
However, the creation of a concrete collar around it for a ring road has perhaps been to the detriment of communities outside of it and for businesses inside it, which have struggled to expand.
David Kuczora, a science park tenant and member of the city centre committee for lobbying group Birmingham Future, said: "Despite the efforts invested in the science park and Eastside more generally to inspire both academic and economic development, we remain constrained by the concrete collar. There is no feasible way to traverse the city other than on foot, by car or making multiple bus changes.
Having witnessed the destruction of Masshouse Circus some 15 years ago, its disappointing that work to eradicate the remainder of the concrete collar has not progressed much further.
She was a key player on Birmingham's powerful planning committee for 17 years, including six as chairman, during which time developments such as Brindleyplace, the Bullring and Selfridges and the breaking of the 'concrete collar' came through.
Former councillor Renee Spector was key player on Birmingham's powerful planning committee for 17 years, including six as chairman, during which time developments such as Brindleyplace, the Bullring and Selfridges and the breaking of the concrete collar came through.
It should also not be underestimated that the Paradise Circus site is ripe for redevelopment as part of the ongoing plan to break Birmingham City Centre's concrete collar - a process which began with the demolition of Masshouse Circus.
The Library of Birmingham at Eastside gave the city chance to do this, breaking through Masshouse Circus and severing that hated 'concrete collar'.