Breast Cancer

, Volume 21, Issue 2, pp 146–153 | Cite as

Photoacoustic mammography: initial clinical results

  • Toshiyuki Kitai
  • Masae Torii
  • Tomoharu Sugie
  • Shotaro Kanao
  • Yoshiki Mikami
  • Tsuyoshi Shiina
  • Masakazu Toi
Original Article



Photoacoustic tomography can image the hemoglobin distribution and oxygenation state inside tissue with high spatial resolution. The purpose of this study is to investigate its clinical usefulness for diagnosis of breast cancer and evaluation of therapeutic response in relation to other diagnostic modalities.

Materials and methods

Using a prototype machine for photoacoustic mammography (PAM), 27 breast tumor lesions, including 21 invasive breast cancer (IBC), five ductal carcinoma in situ (DCIS), and one phyllodes tumor, were measured. Nine out of twenty-one IBC patients had received primary systemic therapy (PST).


Eight out of twelve IBC without PST were visible. Notably, detection was possible in all five cases with DCIS, whereas it was not in one case with phyllodes tumor. Seven out of nine IBC with PST were assigned as visible in spite of decreased size of tumor after PST. The mean value of hemoglobin saturation in the visible lesions was 78.6 %, and hemoglobin concentration was 207 μM. The tumor images of PAM were comparable to those of magnetic resonance imaging (MRI).


It is suggested that PAM can image tumor vascularity and oxygenation, which may be useful for diagnosis and characterization of breast cancer.


Photoacoustic mammography Optical imaging Near-infrared Breast cancer Tumor vascularity Oxygenation 



This work is partly supported by the Innovative Techno-Hub for Integrated Medical Bio-imaging Project of the Special Coordination Funds for Promoting Science and Technology, from the Ministry of Education, Culture, Sports, Science, and Technology, Japan.


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Copyright information

© The Japanese Breast Cancer Society 2012

Authors and Affiliations

  • Toshiyuki Kitai
    • 1
  • Masae Torii
    • 1
  • Tomoharu Sugie
    • 1
  • Shotaro Kanao
    • 2
  • Yoshiki Mikami
    • 3
  • Tsuyoshi Shiina
    • 4
  • Masakazu Toi
    • 1
  1. 1.Department of Breast Surgery, Graduate School of MedicineKyoto UniversityKyotoJapan
  2. 2.Department of Diagnostic Imaging and Nuclear Medicine, Graduate School of MedicineKyoto UniversityKyotoJapan
  3. 3.Department of Diagnostic Pathology, Graduate School of MedicineKyoto UniversityKyotoJapan
  4. 4.Department of Human Health Science, Graduate School of MedicineKyoto UniversityKyotoJapan

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