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Evaluation of Lumen Structure Reproducibility Using 3D Rotational DSA with Different Contrast Media

This study assesses the reproducibility of lumen structures in relation to varying concentrations of contrast media (CM) using 3D Rotational Digital Subtraction Angiography (DSA). We examine the effectiveness and reliability of the 3D RA system at the Seoul National University Hospital (SNUH) in providing precise morphological assessments while minimizing CM-induced renal toxicity. Key metrics include scan methods, injection rates, and geometric distortions affecting the resolution. Results indicate significant findings related to the dilution ratios of CM and the impact of intrinsic and extrinsic factors on lumen visualization.

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Evaluation of Lumen Structure Reproducibility Using 3D Rotational DSA with Different Contrast Media

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  1. 박 천 웅 3D rotational DSA를 이용한 조영제 농도별 관강구조물의 재현성 평가 SNUH SNUH

  2. Assesment of Morphology Endovascular treatment Stereotactic surgery Introduction Usefulness of 3D RA

  3. Precision & accuracy assessment Reduction of CM-induced renal toxicity Reduction of CM usage Assessment of reliability Objectives

  4. Flat panel detector X-ray tube Detector size Anode heat storage capacity 42 x 52 cm 2400 kHU Matrix/lines Cooling system 2048 x 2048 Direct oil cooling Photodiode layer Nominal power A-Si 30/65 kw Allura Xper FD 20 Materials and methods

  5. Allura 3D-RA Materials and methods

  6. Contrast Media Phantom Materials and methods

  7. Roll scan Prop. scan Geometry Geometry - Head - Side Range Range - +120°~-120° - +90°~-90° - 4sec - 8sec Scan time Scan time - 120 - 240 Images Images Materials and methods

  8. X-ray system 3D workstation 3D data acquisition 3D Reconstruction Materials and methods

  9. Materials and methods

  10. 144.26± 0.18 143.59± 0.12 144.17± 0.28 144.85± 0.12 144.85± 0.26 144.60± 0.23 144.55± 0.04 144.85± 0.26 144.91± 0.13 5.41± 0.22 5.24± 0.00 5.36± 0.13 9.18± 0.12 9.18± 0.11 9.06± 0.22 19.49± 0.13 19.38± 0.19 19.32± 0.22 SL ML LL SW MW LW Actual 145 145 145 6.5 10.5 20.5 원액 1:1 2:1 Difference by dilution ratio of CM

  11. SL ML LL SW MW LW 145 145 145 6.5 10.5 20.5 Actual 144.02± 0.32 144.70± 0.20 144.74± 0.24 5.28± 0.09 9.13± 0.15 19.34± 0.22 Roll 143.99± 0.43 144.60± 0.22 144.80± 0.20 5.39± 0.19 9.16± 0.17 19.46± 0.12 Prop Difference by scan method

  12. SL ML LL SW MW LW 145 145 145 6.5 10.5 20.5 143.88± 0.29 144.68± 0.24 144.76± 0.22 5.28± 0.09 9.12± 0.15 19.42± 0.17 144.13± 0.40 144.63± 0.22 144.78± 0.22 5.39± 0.19 9.16± 0.17 19.38± 0.20 Actual 無 有 Difference by existence of bony structure

  13. Resolution by dilution ratio of CM 원액 1:1 2:1

  14. Resolution by scan method Roll scan Prop. scan

  15. Resolution by existence of bony structure 無 有

  16. Intrinsic factor of lumen Reconstruction algorithm Injection rate Rendering mode Variable factor of 3D RA Total injection volume Geometric distortion Extrinsic factor of lumen User’s adjustment Conclusion

  17. Thanks for attention!

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