The Study of In Vivo X-Ray Fluorescence (XRF) Technique for Gadolinium (Gd) Measurements in Human Bone

Details

• Personal Author:
  Mostafaei F ; Nie LH
• Description:
  An in vivo K x-ray fluorescence system, based on 109Cd source, for the detection of gadolinium has been investigated. Gd is of interest because of the extensive use of Gd-based contrast agents in MR imaging. A human simulating bone phantom set has been developed. The phantoms were doped with seven concentrations of Gd. Additional elements important for in vivo x-ray fluorescence, Na, Cl and Ca, were also included to create an overall elemental composition consistent with the Reference Man. A new 5 GBq 109Cd source was purchased to improve the source activity in comparison to the previous study (0.17 GBq). The previously published minimum detection limit (MDL) for Gd phantom measurements using KXRF system was 3.3 ppm. In this study the minimum detection limit for bare bone phantoms was found to reduce the MDL to 0.8, a factor of 4.1. The previous published data used only three layers of plastic as soft tissue equivalent materials and found the MDL of 4-4.8 ppm. In this study we have used the plastic with more realistic thicknesses to simulate a soft tissue at tibia. The detection limits for phantoms with Lucite as a tissue equivalent, using a new source, was determined to be 1.81 to 3.47 ppm (µg Gd per gram phantom). Our next study would be testing an in vivo K x-ray fluorescence system, based on 109Cd source on human volunteers who went through MR imaging and were injected by Gd. [Description provided by NIOSH]
• Subjects:
  Occupational Health Radiation Safety
• Keywords:
  Author Keywords: X-ray Fluorescence Systems Imaging Techniques In Vivo Studies Radiology X-ray Fluorescence Analysis X-ray Generators And Sources X-rays XRF
• ISSN:
  1748-0221
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  Indiana ; OSHA Region 5 ; Wisconsin
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  11
• Issue:
  8
• NIOSHTIC Number:
  nn:20069156
• Citation:
  J Instrum 2016 Aug; 11(8):T08001
• Contact Point Address:
  F. Mostafaei, School of Health Sciences, Purdue University, West Lafayette, IN 47907, U.S.A.
• Email:
  fmostafa@purdue.edu
• CAS Registry Number:
  Gadolinium (CAS RN 7440-54-2)
• Federal Fiscal Year:
  2016
• Performing Organization:
  Purdue University, West Lafayette, Indiana
• Peer Reviewed:
  True
• Start Date:
  20120701
• Source Full Name:
  Journal of Instrumentation
• End Date:
  20150630
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:d4077c0b9861a3249eee94404b52177cb215efd6d685dd7183ea35e435ee33589d6c492ad38da5b602774b0073cd3011046087cb4f01fbfaba29f373f3b873a7
• Download URL:
  https://stacks.cdc.gov/view/cdc/207690/cdc_207690_DS1.pdf
• File Type:
  [PDF - 1.99 MB ]