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RAD 354 Chapt . 10 Concepts of RAD Image Quality

RAD 354 Chapt . 10 Concepts of RAD Image Quality. Radiographic Image Quality – Hi image quality = being able to see clearly on the image Spatial resolution – ability to see SMALL objects that are in close proximity to one another Contrast Resolution - OD differences

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RAD 354 Chapt . 10 Concepts of RAD Image Quality

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  1. RAD 354 Chapt. 10 Concepts of RAD Image Quality • Radiographic Image Quality – Hi image quality = being able to see clearly on the image • Spatial resolution – ability to see SMALL objects that are in close proximity to one another • Contrast Resolution - OD differences • Other key terms: detail, visibility of detail and recorded detail

  2. Terms, con’t • Noise; Quantum mottle; • System speed • Film-screen/receptor (how fast the OD is built up) • Characteristic curve (H & D curve, etc); parts of the curve • Sensitometry/densitometry • Log relative exposure – why .3 increments?

  3. Terms Con’t • Contrast – discuss pt., barium, H2O; body habitus; screen-film/receptor factors • Exposure ”latitude” (chemistry/processing/speed of system • Geometric factors – discuss/draw all geo. Type factors

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