Dual-energy imaging in full-field digital mammography: a phantom study.

A dual-energy technique which employs the basis decomposition method is being investigated for application to digital mammography. A three-component phantom, made up of plexiglas, polyethylene, and water, was doubly exposed with the full-field digital mammography system manufactured by General Electric. The 'low' and 'high' energy images were recorded with a Mo/Mo anode-filter combination and a Rh/Rh combination, respectively. The total dose was kept within the acceptable levels of conventional mammography. The first hybrid images obtained with the dual-energy algorithm are presented in comparison with a conventional radiograph of the phantom. Image-quality characteristics at contrast cancellation angles between plexiglas and water are discussed. Preliminary results show that a combination of a standard Mo-anode 28 kV radiograph with a Rh-anode 49 kV radiograph provides the best compromise between image-quality and dose in the hybrid image.

[1]  M Gambaccini,et al.  Dual-energy tissue cancellation in mammography with quasi-monochromatic x-rays. , 2002, Physics in medicine and biology.

[2]  A Fenster,et al.  Dual-energy mammography: initial experimental results. , 1985, Medical physics.

[3]  M Gambaccini,et al.  Signal-to-noise ratio evaluation in dual-energy radiography with synchrotron radiation. , 2002, Physics in medicine and biology.

[4]  A. Macovski,et al.  Generalized image combinations in dual KVP digital radiography. , 1981, Medical physics.

[5]  J. H. Hubbell,et al.  XCOM: Photon cross sections on a personal computer , 1987 .

[6]  T. R. Fewell,et al.  Molybdenum, rhodium, and tungsten anode spectral models using interpolating polynomials with application to mammography. , 1997, Medical physics.

[7]  S. Evans.  Catalogue of Diagnostic X-Ray Spectra and Other Data , 1998 .

[8]  Manuel Sanchez del Rio,et al.  XOP: recent developments , 1998, Optics & Photonics.

[9]  Xinming Liu,et al.  A dual-energy subtraction technique for microcalcification imaging in digital mammography--a signal-to-noise analysis. , 2002, Medical physics.

[10]  D. Dance.  Monte Carlo calculation of conversion factors for the estimation of mean glandular breast dose. , 1990, Physics in medicine and biology.

[11]  A Fenster,et al.  An accurate method for direct dual-energy calibration and decomposition. , 1990, Medical physics.

[12]  P. C. Johns,et al.  X-ray characterisation of normal and neoplastic breast tissues. , 1987, Physics in medicine and biology.

[13]  G. Barnes,et al.  Normalized average glandular dose in molybdenum target-rhodium filter and rhodium target-rhodium filter mammography. , 1994, Radiology.

[14]  S Suryanarayanan,et al.  Full breast digital mammography with an amorphous silicon-based flat panel detector: physical characteristics of a clinical prototype. , 2000, Medical physics.

[16]  A. Macovski,et al.  Energy-selective reconstructions in X-ray computerised tomography , 1976, Physics in medicine and biology.

[17]  A R Cowen,et al.  Dual-energy digital mammography utilizing stimulated phosphor computed radiography. , 1994, Physics in medicine and biology.

[18]  M Ishida,et al.  Breast imaging: dual-energy projection radiography with digital radiography. , 1987, Radiology.

[19]  C. J. Kotre,et al.  Additional factors for the estimation of mean glandular breast dose using the UK mammography dosimetry protocol. , 2000, Physics in medicine and biology.

[20]  P C Johns,et al.  Incorporation of scattered radiation into dual-energy radiologic theory and application to mammography. , 1994, Medical physics.

[21]  S Muller,et al.  Full-field digital mammography designed as a complete system. , 1999, European journal of radiology.