Region of interest
From Wikipedia, the free encyclopedia
A Region of Interest, often abbreviated ROI, is a selected subset of samples within a dataset identified for a particular purpose.
For example:
on a waveform (1D dataset), a time or frequency interval
on an image (2D dataset), the boundaries of an object
in a volume (3D dataset), the contours or surfaces outlining an object
in a time-volume (4D dataset), the outline of an object at or during a particular time interval
The concept of an ROI is commonly used in medical imaging. For example, the boundaries of a tumor may be defined on an image or in a volume, for the purpose of measuring its size. The endocardial border may be defined on an image, perhaps during different phases of the cardiac cycle, say end-systole and end-diastole, for the purpose of assessing cardiac function.
http://en.wikipedia.org/wiki/Region_of_interest
A Region of Interest, often abbreviated ROI, is a selected subset of samples within a dataset identified for a particular purpose.
For example:
on a waveform (1D dataset), a time or frequency interval
on an image (2D dataset), the boundaries of an object
in a volume (3D dataset), the contours or surfaces outlining an object
in a time-volume (4D dataset), the outline of an object at or during a particular time interval
The concept of an ROI is commonly used in medical imaging. For example, the boundaries of a tumor may be defined on an image or in a volume, for the purpose of measuring its size. The endocardial border may be defined on an image, perhaps during different phases of the cardiac cycle, say end-systole and end-diastole, for the purpose of assessing cardiac function.
http://en.wikipedia.org/wiki/Region_of_interest
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