Change: This patient presented to the Emergency Department with a possible foreign body in the upper oesophagus. The lateral projection demonstrated an apparent metallic wire foreign   View changes from previous version. (Word count: 582)

Change: 3 Dimensions Displayed in 2 DimensionMagnificationAll anatomy demonstrated on a plain film image has some degree of magnification. The degree of magnification will depend on geometric factors.   View changes from previous version. (Word count: 369)

Change: Moved by AndyC Feb 8 2010, 2:24 AM EST

Change: OFD (Object to Focal Spot Distance) or object-film distanceSID (Source Image-receptor distance)IR (Image receptor)MagnificationAll anatomy demonstrated on a plain film image has some degree of magnification. The degree of magnification   View changes from previous version. (Word count: 351)

Change: the chest anatomy in the field of view.anatomy. The right image is taken with the patient in exactly the same position with the SID increased to 270cm- this is not a routinely employed SID but can be usefully employed where geometric magnification is likely to cause difficulties.   View changes from previous version. (Word count: 309)

Change: demonstrated on a plain film image has some degree of magnification. The degree of magnification will depend on geometric factors. Whilst this might appear to be something that you learn to pass your radiography exams, it can have surprisingly important implications in the real world. Some examples are shown below.   View changes from previous version. (Word count: 216)

Change: like to call this projectional), the mediastinum appears widened on the best (only) available imaging. ForThis reasonscannot ofbe ignored by the clinicians and the patient is referred for CT chest imaging. pata   View changes from previous version. (Word count: 215)

Change: The left image was taken in the resus room with the patient on a resus trolley. The FFD/SID was limited by the tube height (?radiographer   View changes from previous version. (Word count: 187)