Physics

Question 1

Inverse Square Law

Answer 1

Decreasing the distance between the x-ray tube and the patient surface—->
Increases the concentration of radiation and thus creates a darker radiograph (increased film density)

Question 2

Scatter

Answer 2

Increases with:

• Thickness of patient
• kVp setting
• Field size

Corrections:

• Use grids as needed
• Use appropriate kVp
• Collimate!

Question 3

Upside Down Grid

Answer 3

• Underexposure of edges

- Caused by an upside down focused grid, with near normal transmission at the center