Author: Anonymous

It is important to monitor lung volumes in ICU patients because changes in lung volumes reflect all of the following changes except:

During NREM sleep, N3 is considered the deepest state of sleep. During this time, which waves are seen on an EEG tracing? (these demonstrate diminishing brain activity which suggests a restorative state) I. slow-wave sleep II. fast-wave sleep III. delta-wave sleep IV. alpha-wave sleep

Choosing this matrix (?)  over a 64 x64 matrix on SPECT images will reduce count density by a factor of 4, increase noise by a factor of 3, and require either longer imaging time or an increased radiopharmaceutical dose to preserve image quality. 

The method of expressing a gamma camera’s ability to image an object as a funciton of the frequencies contained within the object is called: 

What is the minimum number of counts that should be obtained in a high count uniformity (uniformity correction) flood for a SPECT camera?

A well counter has an efficiency of 42%. A swab gives a gross count of 1095 cpm and a background of 334 cpm. How many dpm are being produced by the swab?  

Which of the following critical frequency cut-off’s is likely to result in a SPECT image which is too smooth? 

Total combined energy of the two annihilation photons originating from an annihilation reaction is:

Which of the following attenuation techniques provides the best quality images? 

Which of the following does NOT degrade contrast