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Which of the following attenuation methods uses a standard attenuation coefficient of soft tissue applied to the entire matrix of a SPECT image? 

Each of the following contribute to dead-time in PET imaging except: 

How frequently is this QC test performed on SPECT systems? 

Each of the following contribute to background in PET imaging except: 

The QC test on the dose calibrator that determines the instruments ability to measure the activity of a known standard in called_____. 

“Butterworth” is a common type of: 

Prompt coincidences include:

Which of the following radiology specific network systems includes patient registration, scheduling of examinations, patient workflow and resource management, patient and study tracking, reporting, and billing? 

Small objects and sharp edges (demonstrating greatest contrast) are represented by: 

Conversion of 2D projections from the spatial domain to the spatial frequency domain is accomplished by the _____________.