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Preliminary examination to determine the suitable contrast material injection protocol for CT angiography of the pelvis and lower extremities with a multidetector row helical scanner

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Abstract

Purpose

The aim of this study was to determine the best of three protocols for the depiction of arteries in the pelvis and lower extremities by computed tomographic angiography (CTA) with a multidetector row helical scanner.

Materials and methods

CTA was performed in five asymptomatic volunteers using a four-channel multidetector row helical scanner. Low-osmolar iodinated contrast material was injected at the flow rate of 3 ml/s using three protocols: 100 ml of 300 mg I/ml, 150 ml of 300 mg I/ml, and 100 ml of 350 mg I/ml. The CT number of opacified blood was measured at six levels. Three doctors independently assessed the degree of depiction of arteries on CTA images without knowing the protocol using a 3-point scale.

Results

CT numbers at the level of the popliteal artery on the protocol of 150 ml of 300 mg I/ml were significantly greater than the others. The mean score for the depiction of trifurcation on the protocol of 150 ml of 300 mg I/ml was significantly greater than those in the others.

Conclusion

The protocol of 150 ml of 300 mg I/ml was the best for depicting arteries in the pelvis and lower extremities by CTA.

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Authors and Affiliations

  1. Department of Radiology, Showa University Hospital, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo, 142-8666, Japan

    Minoru Honda

  2. Department of Radiology, Jichi Medical School, Tochigi, Japan

    Hideharu Sugimoto

  3. Department of Radiology, Showa University Fujigaoka Hospital, Yokohama, Japan

    Masao Obuchi

  4. Department of Vascular Surgery, Showa University Fujigaoka Hospital, Yokohama, Japan

    Takashi Narisawa

Authors
  1. Minoru Honda
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  2. Hideharu Sugimoto
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  3. Masao Obuchi
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  4. Takashi Narisawa
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Corresponding author

Correspondence to Minoru Honda.

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Honda, M., Sugimoto, H., Obuchi, M. et al. Preliminary examination to determine the suitable contrast material injection protocol for CT angiography of the pelvis and lower extremities with a multidetector row helical scanner. Radiat Med 24, 239–246 (2006). https://doi.org/10.1007/s11604-005-1473-9

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  • DOI: https://doi.org/10.1007/s11604-005-1473-9

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