Radiographic exams – Page 3

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SLOB rule (Same-Lingual, Opposite-Buccal)

Today I will be going over another way to determine the location of an object (known or unknown) that appears on intraoral radiographs. One important note – do not combine the two methods, use only the image shift or the SLOB rule when locating an object. SLOB rule The SLOB…

2 min read 51

Image shift

This week and next I am going to cover two different techniques with the same outcome – determining the location of an object (known or unknown) visualized on radiograph. This object could include but is not limited to supernumerary teeth, impacted teeth, foreign objects, etc. This week will be image…

2 min read 0

X is for x ray: Inverse square law and PID/cone length

This is the last week of post topics from the review for the hygiene written boards. Today is the inverse square law and how this applies to changing the PID/cone length and exposure settings for a comparable image density. Inverse square law The inverse square law applies to any source…

1 min read 0

X is for x ray: Image distortion

Today is image distortion. There is really only one characteristics (actually an artifact) we will be looking at; bending. (Note to those who use wired sensors, it is not possible to bend the sensor without breaking it 🙂 so this will not apply to you). Bending Bending occurs when the…

3 min read 0

X is for x ray: Image Density

Today is all about image density and how different settings on the x ray unit as well as the subject being imaged will effect this. The four topics I will be covering are: milliampere (mA), kilovoltage peak (kVp), exposure time, and subject thickness. I have covered some of these topics…