This technique integrates a low-dose CT scan with the functional SPECT to provide more detailed anatomic information. The CT image (without contrast) is usually taken after the perfusion scan.[10]Radiation exposure is the main disadvantage. Advantages of SPECT/CT: More reliable detection of V/Q ...
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Unfortunately, standard 3D T1 MRI images do not allow to easiy segment the skull bone directly, and therefore, unless a 3D CT scan is available for the same subject, an indirect approach is to be used. For the head layer, starting from the whole-head (cleaned) VMR, and growing a ...