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C-0814 - 256-slice MDCT in suspected lumbar spine disorder: Comparison of standard and reduced-Dose settings using iterative reconstruction

J. M. Weinrich, L. Well, A. Laqmani, C. Behzadi, S. Sehner, H. Nagel, G. Adam, M. Regier; Hamburg/DE Type: Scientific Exhibit
Area of Interests: Trauma, Musculoskeletal bone
Imaging Technique: CT
Procedure: Dosimetry
Special Focuses: Trauma, Dosimetric comparison
Please note: This poster is part of the session VoE 23 - German on Saturday, March 4, 10:00 - 11:00 Add poster to my schedule In your schedule (remove)

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Aims and objectives: Even though there are a few studies about dose reduction of MDCT for imaging the lumbar spine (1-5), there are currently no studies evaluating its implementation in emergency patients with suspected fracture. Therefore, the aim of this study was to compare the effect of two different tube modulatio[...]

Methods and materials: This retrospective HIPAA-compliant study was approved by the local ethics committee. Between March and July 2016, a total of 40 patients were included who were referred to our emergency department for a clinically and radiographically indicated reduced-dose lumbar spine CT (RD CT) for suspected frac[...]

Results: The mean exposure, CTDIvol, DLP and effective dose in RD CT were significantly reduced compared to SD CT (Table 1). OIN was reduced up to 20% and 37% with RD CT reconstructed with iDoseL4 and iDoseL6 while RD CT-FBP showed an increase of 39% OIN compared to SD CT reconstructed with iDoseL3 (p<0.0[...]

Conclusion: For emergency patients suspected with suspected lumbar spine fractures, tube charge settings in combination with IR result in substantial dose reduction of 50% in lumbar spine CT. Diagnostic accuracy and detection of pathologic findings were high and showed a good interobserver agreement. Thus, we c[...]

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References: Yang C-H, Wu T-H, Lin C-J, et al (2016) Knowledge-based Iterative Model Reconstruction Technique in Computed Tomography of Lumbar Spine Lowers Radiation Dose and Improves Tissue Differentiation for Patients with Lower Back Pain. European Journal of Radiology. doi: 10.1016/j.ejrad.2016.07.015 Bohy P,[...]

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