Blog

If the range of Hounsfield numbers on the image is 0 to 200, a value of 250 will display as what color?

With regard to planar gamma camera imaging, the _________ assigns a particular shade of gray to a specific count-per-pixel value. Adjusting this will change the threshold of most intense pixels and increase or decrease the shades of gray visualized. 

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

An expected reading for a geometry test on a 5 ml syringe was 2.95 mCi. The actual reading is 2.63 mCi. Calculate the correction factor: 

Which of the following does NOT degrade contrast

What is the unit of measurement for current of electrons that flow from the filament to the anode?

If a value if within the 68% confidence interval, this means that 68% of all values fall within _______

No acquiring enough stops (angular sampling) during a SPECT acquisition will result in which type of artifact on reconstructed images? 

The major cause of gamma camera non-uniformity is the underlying non-uniformity of the:

The QC test that measures a dose calibrators ability to read accurately over a wide range of activities is known as the _________  and it should be performed _______.