cold spot

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cold spot

In radiation oncology, a tissue region that is exposed to much less radiation than neighboring tissues.

cold spot

An area on a nuclear medicine scan in which no radioactive tracer is taken up, indicative of nonfunctioning tissue in a gland or other structure.
See also: spot
Medical Dictionary, © 2009 Farlex and Partners
References in periodicals archive ?
Moreover, these large-scale hot and cold spots in the microwave background would signify structures 10 times larger than any so far observed in the universe.
Looking for temperature fluctuations on an angular scale of 1.2 degrees, ACME-HEMT has made the most sensitive measurements to date of any instrument trying to find hot and cold spots in the microwave background.
Written by the ever-busy Cullen Bunn ('X-Men: Blue,' 'Deadpool' and 'Harrow Country,' among many others), 'Cold Spots' is a spooky mystery that begins when Dan Kerr sets off across the country to find his missing wife and child.
Articulated arms allow for extensive freedom of movement, and a longer hemmed back prevents cold spots. The hood naturally lies in place to allow for enhanced horizontal visibility.
This allows for customer-supplied thermocouples to be located in the best possible position, which will be recorded and represents the hot and cold spots of the oven based on the most recent calibration survey.
Remember to: Bleed your radiators If your radiators have cold spots, this means you have air in the system, so bleed them using a radiator key.
The design of the convection oven is optimized for the work with high humidity and prevents cold spots, which could turn the wet air back into water.
The advice is: wrap up your water tank; insulate your pipes; bleed your radiators to make sure they are working properly - if your radiators have cold spots, this means you have air in the system, so you will need to bleed them to get them working efficiently; block the breeze - make sure all of your home's windows and doors seal properly to stop warm air escaping; stay safe - don't forget to have an audible carbon monoxide alarm fitted and that you test it regularly; and check to make sure your boiler is working properly now that winter has set in - the older your boiler the more inefficient it will be.
If your radiators have cold spots, this means you have air in your central heating system, so you will need to bleed them to get them working efficiently.
A more comfortable home: Energy-efficient glazing reduces heat loss through windows and means fewer draughts and cold spots.
If radiators have cold spots, this is evidence of air in the system.
Bad installation, he warned, can lead to cold spots in the middle of walls, condensation and fungal growth.