What is spatial frequency in radiography

The number of line pairs per unit length is the spatial frequency, and for MRI systems it is expressed in line pair per centimeter (lp/cm). A low spatial frequency represents large objects, and a high spatial frequency represents small objects.

1. What is meant by spatial frequency?
2. What is spatial frequency radiology?
3. What is an example of spatial frequency?
4. What is spatial and temporal frequency?

What is meant by spatial frequency?

The spatial frequency is defined as line pairs per angular extent of the target, and the phase specifies the relative location of the target image to the detector array raster. From: Encyclopedia of Modern Optics, 2005.

What is spatial frequency radiology?

Spatial frequency domain imaging is a technique to separate the effects of scattering and absorption, and consequently, to approximately quantify a set of chromophores. The technique works by shining different patterns light on the tissue, recording a video of the remitted light, and processing the movie acquired.

What is an example of spatial frequency?

Spatial frequency describes the periodic distributions of light and dark in an image. High spatial frequencies correspond to features such as sharp edges and fine details, whereas low spatial frequencies correspond to features such as global shape.

What is spatial and temporal frequency?

The spatial frequency refers to how many complete periods the signal goes through for a given unit of distance (eg. cylcles/m) while the temporal frequency refers to how many complete periods the signal goes through for a given unit of time (eg. cyles/s or Hz).