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X is for x ray: Image sharpness

Today I’m onto image sharpness.  There are three different characteristics we will be looking at; target size, film composition and patient movement. Target size The target size is just that, the target size in an x ray unit.  This is fixed by the manufacturer and cannot be changed by the…
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Case of the Week: Dens invaginatus with clinical photo

This week I have a case of dens invaginatus.  I have shown a case of dens invaginatus before but this time I have a clinical photo to show the infolding of the enamel.  This case is involving a mandibular premolar.  The radiograph shows a radiopaque inverted triangle with a radiolucent…
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X is for x ray: Image magnification

I gave a lecture recently for the dental hygiene students reviewing for their dental hygiene written boards (NBDHE) and it gave me some ideas for topic posts. So for the next 4 posts I will be talking about x rays, image magnification, image distortion, PID length, etc.  The students told…
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Case of the Week: Vertical root fracture

This week I have a case of a vertical root fracture where there is no separation of the two segments.  This case shows a radiolucent area on the mesial aspect of the root and at the apex of the same root.  This is sometimes to referred to as a “J”…
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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…