Category: Digital Radiography

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Digital radiography: Detector Sensitivity

This last post on digital radiography is on detector sensitivity.  This is probably the most talked about characteristic of digital radiography when the systems are being hyped.  Detector sensitivity is the ability of the sensor/phosphor plate to respond to small amounts of radiation.  There is no term used to measure…
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Digital radiography: Detector Latitude

This weeks topic on digital radiography is detector latitude.  Detector latitude is the ability of a receptor to capture a range of x ray exposures.  The term used to describe this is magnitude.  Analog film has a large range of magnitudes from 0.5 to 4, however, only under bright illumination…
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Digital radiography: Spatial resolution

This weeks topic on digital radiography is spatial resolution.  Spatial resolution is the capacity for distinguishing fine detail in an image.  The term used to identify this is line pairs per millimeter (lp/mm).  The higher the spatial resolution, the greater the capacity for distinguishing fine detail.  An average observer is…
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Digital radiography: Contrast resolution

This weeks topic on digital radiography is contrast resolution.  Contrast resolution is the ability to distinguish gray levels on an image.  The term used to identify how many gray levels that can be identified is bits.  When any number is in front of bits, such as 8 bits or 14…
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Digital radiography: Basics

This will be the first of a new series on digital radiography. I won’t be going into deep detail about the mechanisms of how the different digital radiography systems work but more covering things that a salesperson may tell you or that you’ll see in ads and how to discern…