Location: Lumbar Spine Radiography

Discussion: Lumbar Spine AP/PA BreathingReported This is a featured thread

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YuliaRadStud
YuliaRadStud
Lumbar Spine AP/PA Breathing
Jan 19 2011, 4:31 AM EST | Post edited: Jan 19 2011, 4:31 AM EST
Dear M.J. Fuller,
I saw the nice picture of lateral L-Spine with breathing technique (85kVp, 40mA, 2sec). Could you please post the exposure factors used for the AP/PA L-Spine picture you've shown using breathing technique?
Kind Regards,
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M.J.Fuller
M.J.Fuller
1. RE: Lumbar Spine AP/PA Breathing
Jan 19 2011, 6:36 AM EST | Post edited: Jan 19 2011, 6:36 AM EST
The exposure factors are unknown and may not be that helpful unless you were using the same imaging system and the patient was the same size. As a guide, you employ the same kVp and mAS as you would normally use (say 75kVp and 20mAS- less with DR). The difference is in how the mAS is derived. Rather than using 250mA for 0.1 seconds, try 25mA for 1 second. ... or 12.5 mA for 2 seconds if the patient is very compliant. (Reciprocity law failure has been ignored)
If you use a long FFD (SID), these exposure factors will need to be increased. This technique is not suitable for every patient in every situation.
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