European Radiology

, Volume 27, Issue 12, pp 4931–4940 | Cite as

Improved assessment of mediastinal and pulmonary pathologies in combined staging CT examinations using a fast-speed acquisition dual-source CT protocol

  • Franziska M. Braun
  • Veronica Holzner
  • Felix G. Meinel
  • Marco Armbruster
  • Martina Brandlhuber
  • Birgit Ertl-Wagner
  • Wieland H. Sommer
Oncology
  • 132 Downloads

Abstract

Objectives

To demonstrate the feasibility of fast Dual-Source CT (DSCT) and to evaluate the clinical utility in chest/abdomen/pelvis staging CT studies.

Methods

45 cancer patients with two follow-up combined chest/abdomen/pelvis staging CT examinations (maximally ±10 kV difference in tube potential) were included. The first scan had to be performed with our standard protocol (fixed pitch 0.6), the second one using a novel fast-speed DSCT protocol (fixed pitch 1.55). Effective doses (ED) were calculated, noise measurements performed. Scan times were compared, motion artefacts and the diagnostic confidence rated in consensus reading.

Results

ED for the standard and fast-speed scans was 9.1 (7.0-11.1) mSv and 9.2 (7.4-12.8) mSv, respectively (P = 0.075). Image noise was comparable (abdomen; all P > 0.05) or reduced for fast-speed CTs (trachea, P = 0.001; ascending aorta, P < 0.001). Motion artefacts of the heart/the ascending aorta (all P < 0.001) and breathing artefacts (P < 0.031) were reduced in fast DSCT. The diagnostic confidence for the evaluation of mediastinal (P < 0.001) and pulmonary (P = 0.008) pathologies was improved for fast DSCT.

Conclusions

Fast DSCT for chest/abdomen/pelvis staging CT examinations is performed within 2 seconds scan time and eliminates relevant intrathoracic motion/breathing artefacts. Mediastinal/pulmonary pathologies can thus be assessed with high diagnostic confidence. Abdominal image quality remains excellent.

Key points

Fast dual-source CT provides chest/abdomen/pelvis staging examinations within 2 seconds scan time.

The sevenfold scan time reduction eliminates relevant intrathoracic motion/breathing artefacts.

Mediastinal/pulmonary pathologies can now be assessed with high diagnostic confidence.

The coverage of the peripheral soft tissues is comparable to single-source CT.

Fast and large-volume oncologic DSCT can be performed with 9 mSv effective dose.

Keywords

Dual-source computed tomography Oncology Thorax Abdomen Pelvis 

Abbreviations

CT

Computed tomography

CTDIvol

Volumetric CT dose index

DLP

Dose length product

DSCT

Dual-source CT system

ED

Effective radiation dose

FOV

Field of view

PACS

Picture archiving and communication system

ROI

Region of interest

Notes

Compliance with ethical standards

Guarantor

The scientific guarantor of this publication is W. H. Sommer.

Conflict of interest

The authors of this manuscript declare no relationships with any companies, whose products or services may be related to the subject matter of the article.

Funding

The authors state that this work has not received any funding.

Statistics and biometry

No complex statistical methods were necessary for this paper.

Informed consent

Written informed consent was waived by the Institutional Review Board.

Ethical approval

Institutional Review Board approval was obtained.

Methodology

• retrospective

• diagnostic study

• performed at one institution

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Copyright information

© European Society of Radiology 2017

Authors and Affiliations

  • Franziska M. Braun
    • 1
  • Veronica Holzner
    • 1
  • Felix G. Meinel
    • 1
  • Marco Armbruster
    • 1
  • Martina Brandlhuber
    • 1
  • Birgit Ertl-Wagner
    • 1
  • Wieland H. Sommer
    • 1
  1. 1.Institute for Clinical RadiologyUniversity Hospital MunichMunichGermany

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