detail The degree of sharpness in an object’s borders in addition to structural details. How “clear” the object looks on the radiograph Recorded detail

detail The degree of sharpness in an object’s borders in addition to structural details. How “clear” the object looks on the radiograph Recorded detail www.phwiki.com

detail The degree of sharpness in an object’s borders in addition to structural details. How “clear” the object looks on the radiograph Recorded detail

Kessel, Dave, General Manager has reference to this Academic Journal, PHwiki organized this Journal Part II Image Quality Image Quality Image Quality Photographic Quality Geometric Quality Why you see what you see The films or images have different levels of density – different shades of gray X-rays show different features of the body in various shades of gray. The gray is darkest in those areas that do not absorb X-rays well – in addition to allow it to pass through The images are lighter in dense areas (like bones) that absorb more of the X-rays.

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Terminology Density, contrast Detail Distortion Image Sharpness spatial resolution Lp/mm Blur Motion SID OID Focal spot size Image receptor Magnification Penumbra Size distortion Shape distortion Focal Spot size Image quality Resolution, ability to distinguish shapes, ability to distinguish lines on image detail

RECORDED DETAIL The degree of sharpness in an object’s borders in addition to structural details. How “clear” the object looks on the radiograph Recorded detail Image sharpness Spatial resolution Smallest separation of two lines or edges Measured by lp/mm RESOLUTION TEST TOOLS LINE PAIRS/ MM Depicts how well you can see the differences in structures More lines=more detail

Recorded Detail SID Focal spot size OID Image receptor type Motion Factors that affect detail

Focal Spot Geometry Angle of anode size Focal Spot Geometry Focal spot is not really a single point Dependent on filament size in addition to anode angle. SID Shine a flashlight on a 3-D object, shadow borders will appear “fuzzy” -On a radiograph called penumbra Penumbra (fuzziness) obscures true border Farther the flashlight from object = sharper borders. Same with radiography.

Recorded Detail: Penumbra in addition to SID Recorded Detail: Penumbra in addition to Focal Spot Size Recorded Detail: Penumbra in addition to OID

The position of the structure in the body will influence how magnified it will be seen on the image The farther away – the more magnified Recorded Detail: OID in addition to Penumbra The closer the object to the film, the sharper the detail. OID , penumbra , sharpness OID , penumbra , sharpness Structures located deep in the body, radiographer must know how to position to get the object closest to the film. Recorded Detail: Image Receptor Type Film/Screen Imaging excellent spatial resolution-smallest detail that can be detected in an image Computed Radiography (cassettes) Digital Radiography (cassette-less) improved contrast resolution

Motion Can be voluntary or involuntary Best controlled by short exposure times Use of careful instructions to the patient Suspension of patient respiration Immobilization devices Blurring of image due to patient movement during exposure. Misrepresentation of size or shape of anatomic part; when part is distorted, detail is reduced distortion

Kessel, Dave KVNA-FM General Manager www.phwiki.com

Distortion An increase of decrease in the size of an object : magnification or reduction Three types: size, shape, placement of part in body Types of Distortion SID-size distortion OID-size distortion Beam Angulation-shape distortion Body Part-Beam alignment-shape distortion FACTOR INFLUENCING DISTORTION Distortion: SID

40” SID VS 72” SID Which one is which Distortion: OID

Elongation Foreshortened Normal

Kessel, Dave General Manager

Kessel, Dave is from United States and they belong to KVNA-FM and they are from  Flagstaff, United States got related to this Particular Journal. and Kessel, Dave deal with the subjects like Entertainment; Music

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This Particular Journal got reviewed and rated by Baker College of Owosso and short form of this particular Institution is US and gave this Journal an Excellent Rating.