diagnostic imaging system

1- Define the concepts of sensitivity, specificity and predictive value as applied to a diagnostic imaging system. [20 marks] 2- Describe the in detail what DQE, how it is applied to medical imaging and what are its advantages
[30 marks] 3- Describe the nyquist criteria and demonstrate aliasing using a sinusoidal wave form
[20 marks] 4- The maximum optical density of an available xray film is 3 and the diameter of the developed grain is 1.25×10-6. What is the number of grains per area?
[20 marks] 5- Draw and describe the characteristic curve of xray film material? [10 marks]