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Understanding the Inverse Square Law in Radiology: Density Maintenance Formula

Chapter 6 delves into the Inverse Square Law, crucial for radiologic practices. It explains the relationship between intensity and distance, highlighting the formula I¹ ‗(I²)² and its application in maintaining image density. A key formula discussed is the density maintenance formula, which states that Old mAs multiplied by the square of the New distance equals New mAs. This principle helps radiologists adjust imaging techniques to ensure optimal exposure and quality, emphasizing its relevance in effective patient care.

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Understanding the Inverse Square Law in Radiology: Density Maintenance Formula

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Presentation Transcript

  1. Chapter 6

    Inverse Square LAW

  2. Inverse square law

    I¹ ‗(I²)² I² (I¹)²
  3. Density maintenance formula, sometimes referred to as direct proportion square law Old mAs x New distance ² New mAs = ________________________ Old distance ² OLD MAS‗ (OLD DISTANCE)² NEW MAS (NEW DISTANCE)²
  4. Referring to P. 6, SID effects image density, so if you need to change SID, use density maintenance formula to maintain the same image density.
  5. Why isn’t SID in the contrast category on P. 6? Assign module worksheet problems

  6. Image Density

    Film Screen Grid Beam restriction Processor Filtration Pathology Air gap patient
  7. Why isn’t SID found in the contrast section on P. 6 of Wallace? (As we discuss the various imaging components, always refer to P. 6 in Wallace the learn why the component is or is not included in the other categories.)
  8. END CHAPTER 6
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