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British Journal of Radiology (1995) 68, 1325-1331
© 1995 British Institute of Radiology
doi: 10.1259/0007-1285-68-816-1325
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Non-destructive elemental analysis of vertebral body trabecular bone using muonic X-rays

Y Hosoi, MD, PhD 1,2 Y Watanabe, PhD 4,5 R Sugita, MD 1 Y Tanaka, MD, PhD 3 K Nagamine, PhD 4,5 T Ono, PhD 2 and K Sakamoto, MD, PhD 1

1 Department of Radiology, Tohoku University School of Medicine, Sendai 980, Japan 2 Department of Radiation Research, Tohoku University School of Medicine, Sendai 980, Japan 3 Orthopaedics, Tohoku University School of Medicine, Sendai 980, Japan 4 Department of Meson Science Laboratory, Faculty of Science, University of Tokyo, Tokyo 119, Japan 5 Department of Institute of Physical and Chemical Research (RIKEN), Wako, Saitama 351–01, Japan

Correspondence: Address correspondence to Dr Yoshio Hosoi, Department of Radiation Research, Tohoku University School of Medicine, 2-1 Seiryomachi, Aobaku, Sendai 980, Japan.

Non-destructive elemental analysis with muonic X-rays was performed on human vertebral bone and lumbar torso phantoms. It can provide quantitative information on all elements in small deep-seated localized volumes. The experiment was carried out using the superconducting muon channel at TRIUMF in Vancouver, Canada and a lithium drifted germanium detector with an active area of 18.5 cm2. The muon channel produced backward-decayed negative muons with wide kinetic energy range from 0.5 to 54.2 MeV. The muon beam was collimated to a diameter of 18 mm. The number of incoming muons was about 4xl06~5xl07 per data point. In the measurements with human vertebral bones fixed with neutralized formaldehyde, the correlation coefficient between calcium content measured by muons and by atomic absorption analysis was 0.99 and the level of significance was 0.0003. In the measurements with lumbar torso phantoms, the correlation coefficient between calcium content measured by muons and by atomic absorption analysis was 0.99 and the level of significance was 0.02. The results suggest that elemental analysis in vertebral body trabecular bone using muonic X-rays closely correlates with measurements by atomic absorption analysis.

Received for publication January 3, 1995. Accepted for publication July 21, 1995.






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