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Optimal injection method for long-range computed tomography angiography.

Aogu Yamaguchi1, Tsukasa Sasaki2

  • 1Division of Radiology, Departments of Medical Technology, Hokkaido University Hospital, Kita 14, Nishi 5, Kita-ku, Sapporo, Hokkaido, 060-8648, Japan. aogu@huhp.hokudai.ac.jp.

Radiological Physics and Technology
|June 3, 2017
PubMed
Summary

The novel Stable Line Imaging Protocol (SLIP) enhances computed tomography angiography (CTA) by extending contrast enhancement duration. This method ensures high-stable CT values for improved diagnostic imaging.

Keywords:
Computed tomography (CT)Computed tomography angiography (CTA)Contrast medium injection methodStable line imaging protocol (SLIP)Time-enhancement curve (TEC)

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Area of Science:

  • Radiology
  • Medical Imaging
  • Diagnostic Imaging

Background:

  • Computed Tomography Angiography (CTA) requires stable contrast enhancement for accurate imaging.
  • Optimizing contrast delivery is crucial for achieving high and consistent CT values.
  • Existing contrast injection methods may have limitations in maintaining prolonged enhancement.

Purpose of the Study:

  • To develop and evaluate a novel contrast injection method, the Stable Line Imaging Protocol (SLIP).
  • To achieve high-stable computed tomography (CT) values for enhanced CT angiography (CTA).
  • To assess the efficacy of SLIP in prolonging the time period of contrast enhancement.

Main Methods:

  • Developed the Stable Line Imaging Protocol (SLIP) involving gradual contrast reduction with simultaneous saline administration.
  • Utilized a contrast material flow phantom for simulating long-range scanning in CTA.
  • Measured time-enhancement curve (TEC) data, peak enhancement (pTEC), and time period of contrast enhancement above 80% (p80).

Main Results:

  • SLIP demonstrated comparable peak CT values (pTEC) to single injection (296.5 ± 2.3 HU vs. 295.7 ± 5.3 HU).
  • SLIP significantly increased the time period of contrast enhancement (p80) by 18% compared to single injection (23.2 ± 0.4 s vs. 19.1 ± 0.2 s).
  • No significant difference in pTEC was observed between SLIP and single injection methods.

Conclusions:

  • The Stable Line Imaging Protocol (SLIP) effectively achieves high-stable CT values for CTA.
  • SLIP prolongs the duration of optimal contrast enhancement, potentially improving diagnostic quality in CTA.
  • This novel injection method offers a promising advancement for CT angiography imaging protocols.