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I più letti

Line Pair Patterns

High-Resolution Bar Test Patterns

 

 

resolution pattern 1 resolution pattern 2 resolution pattern 3

The x-ray test patterns are used for high-contrast and/or spatial resolution measurements.

The procedure has a long tradition in x-ray QA and service and is easy to perform.

The test patterns are used to evaluate film-screen systems, magnification techniques and resolution capabilities of x-ray imaging systems.

The patterns consist of various lead thicknesses. The respective thickness is usually specified on each pattern. Each test pattern is usually enclosed in plastic, i.e. tissue equivalent material.

The resolution range for each pattern varies depending on the test type.

Technical Specifications

  • Type 1: 1.0 ... 4.86 LP/mm / 16 groups
  • Type 1-83: 0.5 ... 5.0 LP/mm / 16 groups
  • Type 2: 0.25 … 3.33 LP/mm / 16 groups
  • Type 4A: 0.5 ... 8.0 LP/mm / 2x 9 groups
  • Type 4B: 0.5 ... 5.5 LP/mm / 2x 13 groups
  • Type 4C: 1.4 ... 8.0 LP/mm / 2x 16 groups
  • Type 6-2,8: 2,8 ... 5,0 LP/mm / 2x 6 groups
  • Type 17: 0.177 ... 3.33 LP/mm / 18 groups
  • Type 18: 0.5 ... 5.0 LP/mm / 21 groups
  • Type 10: 0.25 … 2.0 LP/mm / 6 groups
  • Type 38: 0.6 ... 5.0 LP/mm / 20 groups
  • Type 81: 0.6 … 10.0 LP/mm / 26 groups
  • Type 21: 2.0 ... 10.0 LP/mm / 16 groups
  • Type 22: 3.54 … 4.86 LP/mm / 2x 4 groups
  • Type 22A: 4.0 ... 7.14 LP/mm / 2x 4 groups
  • Type 22B: 3.93 … 5.5 LP/mm / 2x 4 groups
  • Type 16: 0.5 ... 4.0 LP/mm / 7 groups
  • Type 52: 0.05 + 0.1 + 0.25...3.4 + 3.7 LP/mm / 19 groups
  • Type 53: 0.25 + 0.5...10.0...6.0 LP/mm / 23 groups
  • Type 54: 0.5 + 0.1 + 0.25...3.55...2.8 LP/mm / 28 groups
  • Type 56: 0.5 + 0.1 + 0.25...3.55...2.8 LP/mm / 48 groups
  • Type 68: 1.4 ... 8.4 LP/mm / 2x 10 groups
  • Type 80: 2.0 ... 6.0 LP/mm / 2x 12 groups
  • Type 84: 0.6 ... 5.0 LP/mm / 2x 16 groups
  • Type 15: 0.315 ... 1.25 LP/mm / 2x 7 groups
  • Type 41: 0.6 ... 3.4 LP/mm / 2x 15 groups
  • Type 42: 2.0 ... 6.0 LP/mm / 2x 14 groups
  • Type 43: 3.4 ... 10.0 LP/mm / 2x 15 groups
  • Type 46: 0.8 ... 9.5 LP/mm / 2x 15 groups


 

CQ_Radiologia

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