Evaluation of a dichromatic X-ray source for dual-energy imaging in mammography

A. Tuffanelli, S. Fabbri, A. Sarnelli, A. Taibi, M. Gambaccini

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

A novel X-ray system, providing dichromatic beams for dual-energy radiography, has been assembled. The source generates pairs of superimposed quasi-monochromatic beams, having energies E and 2E, with E tuneable in the 15-20 keV range. In this paper the characteristics of the radiation field in terms of energy resolution and fluence, for three dichromatic X-ray beams are reported. A study of the spectra attenuated by a 5 cm-thick phantom of breast equivalent tissue demonstrates that the optimal energy of the dichromatic beam for dual-energy application may be set as a function of the thickness of investigated tissue. A detailed topographic study of mean energy and flux shows the spatial superposition of the first and the second diffraction order beam, that is the main requirement for the application of a single exposure dual-energy radiography. The bidimensional mapping of the irradiated beam is also reported, showing the presence of energy and intensity gradients. We estimate that the observed gradients do not affect the results of dual-energy technique application in an appreciable way.

Original languageEnglish
Pages (from-to)509-518
Number of pages10
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume489
Issue number1-3
DOIs
Publication statusPublished - Aug 21 2002

Fingerprint

Mammography
Radiography
Imaging techniques
X rays
evaluation
Tissue
x rays
energy
Diffraction
radiography
Fluxes
Radiation
gradients
breast
radiation distribution
fluence
requirements

Keywords

  • Bragg diffraction
  • Dichromatic source
  • Dual-energy mammography

ASJC Scopus subject areas

  • Instrumentation
  • Nuclear and High Energy Physics

Cite this

Evaluation of a dichromatic X-ray source for dual-energy imaging in mammography. / Tuffanelli, A.; Fabbri, S.; Sarnelli, A.; Taibi, A.; Gambaccini, M.

In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 489, No. 1-3, 21.08.2002, p. 509-518.

Research output: Contribution to journalArticle

@article{6e2f2754f150422f89041b8004675959,
title = "Evaluation of a dichromatic X-ray source for dual-energy imaging in mammography",
abstract = "A novel X-ray system, providing dichromatic beams for dual-energy radiography, has been assembled. The source generates pairs of superimposed quasi-monochromatic beams, having energies E and 2E, with E tuneable in the 15-20 keV range. In this paper the characteristics of the radiation field in terms of energy resolution and fluence, for three dichromatic X-ray beams are reported. A study of the spectra attenuated by a 5 cm-thick phantom of breast equivalent tissue demonstrates that the optimal energy of the dichromatic beam for dual-energy application may be set as a function of the thickness of investigated tissue. A detailed topographic study of mean energy and flux shows the spatial superposition of the first and the second diffraction order beam, that is the main requirement for the application of a single exposure dual-energy radiography. The bidimensional mapping of the irradiated beam is also reported, showing the presence of energy and intensity gradients. We estimate that the observed gradients do not affect the results of dual-energy technique application in an appreciable way.",
keywords = "Bragg diffraction, Dichromatic source, Dual-energy mammography",
author = "A. Tuffanelli and S. Fabbri and A. Sarnelli and A. Taibi and M. Gambaccini",
year = "2002",
month = "8",
day = "21",
doi = "10.1016/S0168-9002(02)00897-5",
language = "English",
volume = "489",
pages = "509--518",
journal = "Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment",
issn = "0168-9002",
publisher = "Elsevier",
number = "1-3",

}

TY - JOUR

T1 - Evaluation of a dichromatic X-ray source for dual-energy imaging in mammography

AU - Tuffanelli, A.

AU - Fabbri, S.

AU - Sarnelli, A.

AU - Taibi, A.

AU - Gambaccini, M.

PY - 2002/8/21

Y1 - 2002/8/21

N2 - A novel X-ray system, providing dichromatic beams for dual-energy radiography, has been assembled. The source generates pairs of superimposed quasi-monochromatic beams, having energies E and 2E, with E tuneable in the 15-20 keV range. In this paper the characteristics of the radiation field in terms of energy resolution and fluence, for three dichromatic X-ray beams are reported. A study of the spectra attenuated by a 5 cm-thick phantom of breast equivalent tissue demonstrates that the optimal energy of the dichromatic beam for dual-energy application may be set as a function of the thickness of investigated tissue. A detailed topographic study of mean energy and flux shows the spatial superposition of the first and the second diffraction order beam, that is the main requirement for the application of a single exposure dual-energy radiography. The bidimensional mapping of the irradiated beam is also reported, showing the presence of energy and intensity gradients. We estimate that the observed gradients do not affect the results of dual-energy technique application in an appreciable way.

AB - A novel X-ray system, providing dichromatic beams for dual-energy radiography, has been assembled. The source generates pairs of superimposed quasi-monochromatic beams, having energies E and 2E, with E tuneable in the 15-20 keV range. In this paper the characteristics of the radiation field in terms of energy resolution and fluence, for three dichromatic X-ray beams are reported. A study of the spectra attenuated by a 5 cm-thick phantom of breast equivalent tissue demonstrates that the optimal energy of the dichromatic beam for dual-energy application may be set as a function of the thickness of investigated tissue. A detailed topographic study of mean energy and flux shows the spatial superposition of the first and the second diffraction order beam, that is the main requirement for the application of a single exposure dual-energy radiography. The bidimensional mapping of the irradiated beam is also reported, showing the presence of energy and intensity gradients. We estimate that the observed gradients do not affect the results of dual-energy technique application in an appreciable way.

KW - Bragg diffraction

KW - Dichromatic source

KW - Dual-energy mammography

UR - http://www.scopus.com/inward/record.url?scp=0037151416&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0037151416&partnerID=8YFLogxK

U2 - 10.1016/S0168-9002(02)00897-5

DO - 10.1016/S0168-9002(02)00897-5

M3 - Article

AN - SCOPUS:0037151416

VL - 489

SP - 509

EP - 518

JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

SN - 0168-9002

IS - 1-3

ER -