CT-guided lumbar nerve root injections: are we using the correct radiation dose settings?

AJNR. American Journal of Neuroradiology
J S SchaubergerJ K Hoang

Abstract

Selecting a lower tube current for CT fluoroscopic spine injections is a method of radiation dose reduction. Ideally tube current should be tailored to the patient's body habitus, but a greater influence on tube current may be the proceduralist's personal preference. The purpose of this study was to compare tube current and fluoroscopy time of different proceduralists for lumbar spine CT-guided selective nerve root blocks, and to correlate image quality to patient diameter and tube current. Eighty CT-guided SNRBs performed by 4 proceduralists were retrospectively reviewed for tube current and fluoroscopy time. Patient body habitus was evaluated by measuring anteroposterior diameters on scout images. Image quality was evaluated objectively and subjectively: noise was measured in the psoas muscle and images were graded on a 3-point scale. The mean tube current was 59 ± 20 mA and mean fluoroscopy time was 10.4 ± 7.5 seconds. The mean tube current between proceduralists differed by almost 2-fold, and there was greater than 2-fold difference in mean fluoroscopy time (P < .0001 and .01, respectively). Mean AP body size was 27 ± 5 cm. When categoric data of tube current and AP diameter were analyzed, only AP diameter was a statistical...Continue Reading

References

Jan 30, 2002·Cardiovascular and Interventional Radiology·J J Froelich, H J Wagner
May 6, 2005·Journal of Vascular and Interventional Radiology : JVIR·Diego A AguirreOrlando M Diaz
Apr 12, 2007·The Journal of the American Academy of Orthopaedic Surgeons·Irene A YoungAndrew J Cole
Jan 30, 2009·Medical Physics·Xiang LiDonald P Frush
Sep 17, 2011·AJNR. American Journal of Neuroradiology·T M ShepherdW P Dillon
Oct 25, 2011·AJR. American Journal of Roentgenology·Jenny K HoangLynne M Hurwitz

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Citations

Jun 5, 2013·Journal of Neurointerventional Surgery·Andrew D BrookTodd S Miller
Jan 23, 2016·AJR. American Journal of Roentgenology·Timothy J AmrheinJenny K Hoang
Nov 5, 2014·Interventional Neuroradiology : Journal of Peritherapeutic Neuroradiology, Surgical Procedures and Related Neurosciences·Ronald J ViolaPeter G Kranz

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