notching


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A term referring to small grooves on the inferior face of the ribs, usually the 4th-8th thoracic ribs, seen on a plain film of 70% of older children and adults with uncorrected post-ductal—ductus arteriosus—coarctation of the aorta, due to ‘tracks’ from the pressure of dilated intercostal collateral vessels on the ribs

notching

Radiology Small grooves on the anterior aspect of ribs seen on a plain CXR of children with post-ductal–ductus arteriosus coarctation of the aorta, due to 'tracks' from the pressure of collateral vessels on the ribs.
References in periodicals archive ?
Fitch has not applied additional notching to the notes for non-performance risk according to Fitch's criteria, as the notes have no going-concern loss-absorption features, and Fitch believes that write-down of the notes will only occur once the point of non-viability is reached.
Reviews suggest that bilateral diastolic notching and pulsatility index are more promising doppler parameters to fulfill these pre requisites6.
MARC's notching guidelines reflect the lower recovery prospects and higher risks of write-off or enforced conversion of capital instruments for Basel III-compliant capital instruments as compared to their Basel II predecessors, particularly for banks rated lower on financial strength.
Although control and experimental lobsters in tank C did not demonstrate significant differences in mortality, particular interest is paid to the period at the start of the experiment, when 12% of v-notched lobsters died immediately after notching.
The notching device required for the most popular impact tests--notched Izod and notched Charpy--is sold separately from the test instrument.
That's the real reason you want to follow the notching and boring guidelines.