1. Fill in the blanks

Visible light is a form of radiation.

The exposure rate dependency between exposure and OD of the film for every long or very short exposure is called

For H and D curve of a traditional film screen system, the steeper slope indicates contrast.

The grid ratio generally used in radiography is

Differential attenuation is affected by

Increase in field size will increase radiation.

In a traditional film screen system the thicker screen will result in increased of the system.

For radiography film, latitude refers range of over which the film is radiographically useful.

The width of the penumbra region depends upon the of the focus.

The full form of FWHM is

2. Write short notes on the following:

Nal crystal in Nuclear Medicine

Range of radiation doses in medical imaging

Base +Fog in Radiography Film

Resolution in film screen system

Benefits of digital imaging over analog imaging

Radiographic cassette

Attempt any four questions:

3. What is Bremsstrahlung radiation? How is it different from characteristic radiation?

4. Explain the various methods to reduce patient's radiation dose in medical imaging.

5. Explain the image formation in Computed Radiography system.

6. Explain daily quality insurance programme in traditional film processor system.

7. Compare Rare Earth screen with Calcium Tungstate screen.

Attempt any three questions:

8. Explain Digital Radiography system of imaging. Write its advantages and disadvantages with respect to traditional film screen system.

9. What is the characteristic curve of a film screen system? Explain it with its use in medical imaging.

10. Explain the structure and function of a traditional film as image recorder. Kindly explain the chemical reactions involved in development of the film.

11. Explain in detail the structure and function of screen in a traditional cassette.