CT spec is
detector : 1152x1152, 127um
source focal spot : 50um
So,
If i do reconstruction, how can i determine recon image resolution?
I do recon with 640x640x600, 30um.
but detector and source is larger than 30um.
so i think i can't do recon like that.
Does it have limitation of resolution?
I wonder how the recon size is affected by the detector or source and how to set the resolution value.
In fan beam CT scans, the nominal resolution can be obtained as;
Detector Pixel Size/(Magnification)
Where Magnifications is as follows;
M = SDD/SOD
SDD=Source to Detector Distance and SOD=Source to Object Distance
You can choose the image pixel size as low as you want, but the optimal selection cannot be lower than half of mentioned resolution.
Voxel size is an important component of image quality. Voxel is the 3-D analog of a pixel. Voxel size is related to both the pixel size and slice thickness. ... Pixel size is typically between 0.5 and 1.5 mm. The smaller the pixel size, the greater the image spatial resolution.
The energy resolution (Re) of a detector measures its ability to distinguish gamma-rays with close energies. The better the energy resolution, the better it can separate two adjacent energy peaks, which allows identifying different decays or radionuclides in the spectrum.
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