European Radiology

, Volume 22, Issue 11, pp 2458–2464 | Cite as

PET/CT in lung cancer: Influence of contrast medium on quantitative and clinical assessment

  • Florian F. Behrendt
  • Yavuz Temur
  • Frederik A. Verburg
  • Moritz Palmowski
  • Thomas Krohn
  • Hubertus Pietsch
  • Christiane K. Kuhl
  • Felix M. Mottaghy
Oncology

Abstract

Objectives

To evaluate the influence of intravenous contrast medium and different contrast medium phases on attenuation correction, PET image quality and clinical staging in combined PET/CT in patients with a suspicion of lung cancer.

Methods

Sixty patients with a suspicion of lung cancer were prospectively enrolled for combined 18F-FDG-PET/CT examination. PET images were reconstructed with non-enhanced and arterial and venous phase contrast CT. Maximum and mean standardised uptake values (SUVmax and SUVmean) and contrast enhancement (HU) were determined in the subclavian vein, ascending aorta, abdominal aorta, inferior vena cava, portal vein, liver and kidney and lung tumour. PET data were evaluated visually for clinical staging and image quality.

Results

SUVmax was significantly increased between contrast and non-contrast PET/CT at all anatomic sites (all P < 0.001). SUVmax was significantly increased for arterial PET/CT compared to venous PET/CT in the arteries (all P < 0.001). Venous PET/CT resulted in significantly higher SUVmax values compared to arterial PET/CT in the parenchymatous organs (all P < 0.05). Visual clinical evaluation of malignant lesions showed no differences between contrast and non-contrast PET/CT (P = 1.0).

Conclusions

Contrast enhanced CT is suitable for attenuation correction in combined PET/CT in lung cancer; it affects neither the clinical assessment nor image quality of the PET images.

Key Points

Positron emission tomography combined with computed tomography is now a mainstream investigation

There has been debate about whether CT contrast agents affect PET results

Contrast-enhanced CT is satisfactory for attenuation correction in lung cancer PET/CT

Multiphase CT does not affect PET; additional unenhanced CT is unnecessary

For quantitative follow-up PET analysis, an identical PET/CT protocol is required

Keywords

PET/CT Attenuation correction Contrast medium Lung cancer SUV 

Notes

Acknowledgements

Hubertus Pietsch is an employee of Bayer Healthcare AG. This study was supported by an unrestricted grant from Bayer Healthcare, Berlin, Germany.

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Copyright information

© European Society of Radiology 2012

Authors and Affiliations

  • Florian F. Behrendt
    • 6
  • Yavuz Temur
    • 1
  • Frederik A. Verburg
    • 1
    • 2
  • Moritz Palmowski
    • 1
    • 3
    • 4
  • Thomas Krohn
    • 1
  • Hubertus Pietsch
    • 5
  • Christiane K. Kuhl
    • 3
  • Felix M. Mottaghy
    • 1
    • 2
  1. 1.Department of Nuclear MedicineRWTH Aachen UniversityAachenGermany
  2. 2.Department of Nuclear MedicineMaastricht University Medical CenterMaastrichtThe Netherlands
  3. 3.Department of RadiologyRWTH Aachen UniversityAachenGermany
  4. 4.Department of Experimental Molecular ImagingRWTH Aachen UniversityAachenGermany
  5. 5.Contrast Media ResearchBayer Healthcare AGBerlinGermany
  6. 6.Department of Nuclear Medicine, University HospitalRWTH-Aachen UniversityAachenGermany

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