Change: Moved by AndyC Feb 8 2010, 6:48 AM EST

Change: John Harris notes (The Radiology of Emergency Medicine, 3rd Ed, 1993, p 273, Williams and Wilkins) "The etiology of spondylolysis is overwhelmingly congenital, although sporadic reports of traumatic lumbar spondylolysis appear in the literature". CT imaging will usually ientify the edfects as characteristically acute or otherwise.Positioning TechniqueOblique   View changes from previous version. (Word count: 1553)

Change: all of the entire lumbar vertebra, don't angle the beam. For imaging the lower lumbar vertebra (L4/5, L5/S1) angle to match the lumbar lordosisalso depends on the patient's lumbar lordosisWhat exposure technique should be employed? You may need a considerable increase in   View changes from previous version. (Word count: 1504)

Change: This is a lateral lumbar spine using a long exposure time and long ffd on film/screen . In addition, an aluminium wedge filter has been placed to reduce the exposure to all but L5 and lower. There is a defect of the L5 pars interarticularis- probably bilateral (white arrow).The   View changes from previous version. (Word count: 1443)

Change:  both.It is important to note that a patient who has a defect of the pars interarticularis (scotty's neck) may not have an acute injury. The defect may be congenital.http://www.gentili.net/signs/20.htmhttp://www.gentili.net/signs/20.htmnormal Scotty'No neck' Scotty at L5 (spondylolysis and spondylolisthesis)...back to the Applied Radiography home page   View changes from previous version. (Word count: 1218)

Change: Of course, imaging of the intervertebral discs is not important with oblique views of the lumbar spine. However, if the lumbar intervertebral discs are not imaged in profile, imaging of the posterior elements of the spine will also be compromised.http://www.medscape.com/content/1999/00/40/85/408509/art-mos4931.solo.fig4.jpgThese images demonstrate the tendency   View changes from previous version. (Word count: 1160)

Change: http://www.medscape.comhttp://www.medscape.com/content/1999/00/40/85/408509/art-mos4931.solo.fig4.jpgThese images demonstrate the tendency to produce an undistorted view of the central lumbar vertebra in the oblique projection. There are two strategies that might help avoid this problem.1. Use a PA technique2. Image the lower 3 lumbar discs   View changes from previous version. (Word count: 1120)

Change: Erect Oblique Lumbar spine TechniqueErect AP Oblique Lumbar SpineErect PA Oblique Lumbar Spinemedinfo.ufl.edu:8050/~rad6190/topics/pdf_of_lectures/Lecture_3_notes.pdf medinfo.ufl.edu:8050/~rad6190/topics/pdf_of_lectures/Lecture_3_notes.pdf Centre Point for PA TechiqueIncorrectCorrrectThis is a trap that you might fall into the first time you   View changes from previous version. (Word count: 1082)

Change: 2. Image the lower 3 lumbar discs only and angle the beam to suit (cephalic angle for AP technique and caudal angle for PA technique)Erect AP Oblique Lumbar SpineErect PA Oblique Lumbar Spinemedinfo.ufl.edu:8050/~rad6190/topics/pdf_of_lectures/Lecture_3_notes.pdf medinfo.ufl.edu:8050/~rad6190/topics/pdf_of_lectures/Lecture_3_notes.pdf IncorrectCorrrectThis is a trap that you   View changes from previous version. (Word count: 1043)

Change: scotty's neck is missing, the patient probablymay hashave a fracturetraumatic ofinjury to the pars interarticularisinterarticularis, a congenital defect or both.http://www.gentili.net/signs/20.htmhttp://www.gentili.net/signs/20.htmnormal ScottyNo neck Scotty at L5 (spondylolysis and spondylolisthesis)...back to the Applied Radiography home page   View changes from previous version. (Word count: 899)