A tissue-equivalent phantom series for mammography dosimetry.
A breast tissue-equivalent series (BRTES) of phantoms is manufactured to mimic both the attenuation and the density of the range of glandular and adipose tissue compositions encountered in mammography. The BRTES simulates breast tissues across the range of 20% to 70% glandularity and can be assembled in a variety of thicknesses to represent a compressed breast thickness corresponding to glandularity to simulate various patient demographics. The fabrication techniques are presented, and the physical properties of the completed series of phantoms are described. The BRTES phantoms provide a dosimetry comparison with commonly used phantoms, including the American College of Radiology accreditation phantom and BR12, a 50% glandularity tissue-equivalent material. The comparison shows that the average glandular dose is a strong function of compressed breast thickness and tissue composition. Patient doses measured using photo-timed exposures with the BRTES phantoms can be up to a factor of 3 greater than or less than the doses predicted using conventional phantoms.
Argo
William P
WP
U.S. Army Medical Department Center and School with duty at University of Florida, 202 Nuclear Sciences Center, P.O. Box 118300, Gainesville, Florida 32611-8300, USA. William.Argo@CEN.AMEDD.ARMY.MIL
Hintenlang
Kathleen
K
Hintenlang
David E
DE
D004867:Equipment Design; D019544:Equipment Failure Analysis; D005260:Female; D006801:Humans; D008327:Mammography / Q000295:instrumentation* / Q000379:methods; D019047:Phantoms, Imaging; D011857:Radiographic Image Interpretation, Computer-Assisted / Q000295:instrumentation* / Q000379:methods; D011874:Radiometry / Q000295:instrumentation* / Q000379:methods; D011879:Radiotherapy Dosage; D011880:Radiotherapy Planning, Computer-Assisted / Q000295:instrumentation* / Q000379:methods; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
Radiology. 1991 Apr;179(1):143-8
2006265
Phys Med Biol. 2000 Mar;45(3):801-13
10730972
Radiology. 1996 Feb;198(2):347-50
8596830
Br J Radiol. 1977 Nov;50(599):814-21
588903
J Appl Clin Med Phys. 2002 Summer;3(3):248-54
12132948
AJR Am J Roentgenol. 1994 Dec;163(6):1371-4
7992731
Radiat Res. 1977 Apr;70(1):58-81
850736