Skip to main content

High-resolution spiral CT of the breast at very low dose: concept and feasibility considerations

Abstract

Objective

Mammography, today’s standard imaging approach, has deficits with respect to the superimposition of anatomical structures. Dedicated CT of the breast so far indicated that it can provide superior soft-tissue imaging, but that it still has significant limitations with respect to spatial resolution and dose. We have assessed novel dedicated breast CT technology.

Methods

Based on simulations and measurements we developed novel technology which uses direct-conversion CdTe material and photon-counting electronics with 100 μm detector element size for close to 100% dose efficiency. We assessed the potential for the imaging of microcalcifications of 100 to 200 μm diameter and soft-tissue lesions of 1 to 5 mm diameter by simulations at dose levels between 1 and 6 mGy.

Results

Microcalcifications of 150 μm and soft-tissue lesions of 2 mm diameter were found to be clearly detectable at an average glandular dose of 3 mGy. Separate displays are required for high-resolution microcalcification and for low-resolution soft-tissue analysis. Total CT data acquisition time will be below 10 s.

Conclusion

Dedicated breast CT may eventually provide comprehensive diagnostic assessment of microcalcifications and soft-tissue structures at dose levels equivalent to or below those of two-view screening mammography.

This is a preview of subscription content, access via your institution.

Fig. 1
Fig. 2
Fig. 3
Fig. 4

References

  1. Hall FM (2008) The rise and impending decline of screening mammography. Radiology 247:597–601

    PubMed  Article  Google Scholar 

  2. Smith JA, Andreopoulou E (2004) An overview of the status of imaging screening technology for breast cancer. Ann Oncol 15(Suppl 1):18–26

    Article  Google Scholar 

  3. Yaffe MJ (2004) What should the burden of proof be for acceptance of a new breast-cancer screening technique? Lancet 364(9440):1111–1112

    PubMed  Article  Google Scholar 

  4. Carney PA, Miglioretti DL, Yankaskas BC et al (2003) Individual and combined effects of age, breast density, and hormone replacement therapy use on the accuracy of screening mammography. Ann Intern Med 138:168–175

    PubMed  Google Scholar 

  5. Kolb TM, Lichy J, Newhouse JH (2002) Comparison of the performance of screening mammography, physical examination, and breast US and evaluation of factors that influence them: an analysis of 27,825 patient evaluations. Radiology 225:165–175

    PubMed  Article  Google Scholar 

  6. Kuhl CK, Schrading S, Leutner CC et al (2005) Mammography, breast ultrasound, and magnetic resonance imaging for surveillance of women at high familial risk for breast cancer. J Clin Oncol 23:8469–8476

    PubMed  Article  Google Scholar 

  7. Gennaro G, Toledano A, di Maggio C et al (2010) Digital breast tomosynthesis versus digital mammography: a clinical performance study. Eur Radiol 20:1545–1553

    PubMed  Article  Google Scholar 

  8. Gur D, Abrams GS, Chough DM et al (2009) Digital breast tomosynthesis: observer performance study. American Journal of Roentgenology 193:586–591

    PubMed  Article  Google Scholar 

  9. Teertstra H, Loo C, van den Bosch M et al (2010) Breast tomosynthesis in clinical practice: initial results. Eur Radiol 20:16–24

    PubMed  Article  Google Scholar 

  10. Boone JM, Nelson TR, Lindfors KK, Seibert JA (2001) Dedicated breast CT: radiation dose and image quality evaluation. Radiology 221:657–667

    PubMed  Article  CAS  Google Scholar 

  11. Lindfors KK, Boone JM, Nelson TR, Yang K, Kwan ALC, Miller DF (2008) Dedicated breast CT: initial clinical experience. Radiology 246:725–733

    PubMed  Article  Google Scholar 

  12. O’Connell A, Conover DL, Zhang Y et al (2010) Cone-beam CT for breast imaging: radiation dose, breast coverage, and image quality. Am J Roentgenol 195:496–509

    Article  Google Scholar 

  13. McCormack VA, dos Santos SI (2006) Breast density and parenchymal patterns as markers of breast cancer risk: a meta-analysis. Cancer Epidemiol Biomarkers Prev 15:1159–1169

    PubMed  Article  Google Scholar 

  14. Prionas ND, Lindfors KK, Ray S et al (2010) Contrast-enhanced dedicated breast CT: initial clinical experience. Radiology 256:714–723

    PubMed  Article  Google Scholar 

  15. Kalender WA (2009) High-resolution CT of the breast: a proposal! Eur Radiol 19(Suppl 4):849–852

    Google Scholar 

  16. European Reference Organisation for Quality Assured Breast Screening and Diagnostic Services (EUREF) (2008) European guidelines for quality assurance in breast cancer screening and diagnosis, Fourth Edition. http://www.euref.org/index.php?option=com\_content\&view=article\&id=5\&Itemid=25. Accessed May 26, 2011

  17. American College of Radiology (2008) ACR Practice guidline for performance of Screening and diagnostic mammography. http://www.acr.org/secondarymainmenucategories/quality_safety/guidelines/breast/screening_diagnostic.aspx. Accessed May 26, 2011

  18. Yaffe MJ, Mainprize JG (2011) Risk of radiation-induced breast cancer from mammographic screening. Radiology 258:98–105

    PubMed  Article  Google Scholar 

  19. EC EURATOM 7th Framework Program “Dedicated CT of the female breast: Feasibility, optimization and comparison to competing imaging modalities”, Contract No. FP/213153 (2008–2010) PI: W. A. Kalender. http://www.imp.uni-erlangen.de/BreastCT/index.html. Accessed May 26, 2011

  20. Deutsche Forschungsgemeinschaft Research Unit FOR 661 “Multimodal Imaging for Preclinical Research”, DFG Az. KA 1254/11-2 (2009–2012) PI: W. A. Kalender. http://www.imp.uni-erlangen.de/for661/index.htm. Accessed May 26, 2011

  21. Hendrick RE, Pisano ED, Averbukh A et al (2010) Comparison of acquisition parameters and breast dose in digital mammogrphy and screen-film mammography in the American College of Radiology Imaging Network Digital Mammographic Imaging Screening Trial. Am J Radiology 194:362–369

    Google Scholar 

  22. Boone JM, Shah N, Nelson TR (2004) A comprehensive analysis of DgN[sub CT] coefficients for pendant-geometry cone-beam breast computed tomography. Med Phys 31:226–235

    PubMed  Article  CAS  Google Scholar 

  23. Kalender WA (2011) Computed tomography. Publicis Corporate Publishing, Erlangen

    Google Scholar 

  24. Weigel M, Vollmar SV, Kalender WA (2011) Spectral optimization for dedicated breast CT. Med Phys 38:114–124

    PubMed  Article  Google Scholar 

  25. Kolditz D, Kyriakou Y, Kalender WA (2010) Volume-of-interest (VOI) imaging in C-arm flat-detector CT for high image quality at reduced dose. Med Phys 37:2719–2730

    PubMed  Article  Google Scholar 

  26. Beekman FJ, Kamphuis C (2001) Ordered subset reconstruction for x-ray CT. Phys Med Biol 46:1835

    Article  Google Scholar 

  27. International Commission on Radiation Units and Measurements (1989) ICRU report 44: tissue substitutes in radiation dosimetry and measurement

  28. Yaffe MJ, Boone JM, Packard N et al (2009) The myth of the 50–50 breast. Med Phys 36:5437–5443

    PubMed  Article  CAS  Google Scholar 

  29. Deak PD, Langner O, Lell M, Kalender WA (2009) Effects of adaptive section collimation on patient radiation dose in multisection spiral CT. Radiology 252:140–147

    PubMed  Article  Google Scholar 

  30. Sechopoulos I, Feng SSJ, D’Orsi CJ (2010) Dosimetric characterization of a dedicated breast computed tomography clinical prototype. Med Phys 37:4110–4120

    PubMed  Article  Google Scholar 

  31. Bundesministerium für Bildung und Forschung (BMBF) Spitzencluster Medical Valley, Verbund Bildgebende Diagnostik: Leitprojekt Brust CT, Az. 01EX1002 PI: W. A. Kalender

Download references

Acknowledgements

The authors are grateful for the financial support of this work by the European Union [19], the Deutsche Forschungsgemeinschaft [20] and the Bundesministerium für Bildung und Forschung [31]. The results presented were produced in a cooperation of the Institute of Medical Physics and Artemis Imaging GmbH, a spinoff of the IMP and also located in Erlangen. Special thanks go to our colleagues Felix Althoff, Ronny Hendrych, Martin Hupfer, and Tristan Nowak for their tremendous support of this work.

W. Kalender is the founder, CEO and shareholder of Artemis Imaging GmbH, Erlangen, Germany.

M. Beister and D. Kolditz are part-time employees of Artemis Imaging, J. Boone is a consultant to Artemis Imaging.

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Willi A. Kalender.

Additional information

Key points

– Breast CT allows diagnosing both microcalcifications and soft tissue in one acquisition.

– Microcalcifications of 100 to 150 μm are resolved.

– Soft tissue lesions down to 2 mm diameter are discernable.

– Dose levels of 2–4 mGy AGD conform with constraints imposed on screening.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Kalender, W.A., Beister, M., Boone, J.M. et al. High-resolution spiral CT of the breast at very low dose: concept and feasibility considerations. Eur Radiol 22, 1–8 (2012). https://doi.org/10.1007/s00330-011-2169-4

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s00330-011-2169-4

Keywords

  • Computed tomography (CT)
  • Breast
  • Image quality
  • Spatial resolution
  • Dose efficiency