Tag: gray scale

4 min read 2

ROC curves in Dentistry

This week I’m focusing on ROC curves in dentistry and the different imaging modalities (primarily film versus digital).  As these numbers can change based on the research being performed and the reviewers of those radiographs, I thought the best way to break this all down is to give a short…
2 min read 2

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…
3 min read 15

x ray unit settings: kilovoltage peak (kVp)

This is the beginning of a 4 week series going over the settings on a x ray unit and how they affect image quality.  The first topic I am going to cover is kilovoltage peak or kVp.  Changing the kVp on a unit is directly associated with the overall contrast…