Element distribution imaging in rat kidney using a 2D rapid scan EDXRF device

Authors
Figueroa, Rodolfo; Lozano, E.; Bongiovanni, Guillermina Azucena
Publication Year
2013
Language
English
Format
article
Status
Published version
Description
Visualization of elemental distributions of biological tissue is gaining importance in many disciplines of biological, forensic, and medical research. On the other hand, the mapping of elements has wider application to the archaeological, to understanding pigments, modes of preservation, and environmental context. Since major advances in relation to collimators and detectors have yielded micro scale images, the chemical mapping via synchrotron scanning micro-X-ray fluorescence spectrometry (SR-µXRF) is widely used as microanalytical techniques. However, the acquisition time is a limitation of current SR-µXRF imaging protocols, doing tedious micro analysis of samples of more than 1 cm and very difficult to study of larger samples such as animal organ, whole organisms, work of art, etc. Recently we have developed a robotic system to image the chemistry of large specimens rapidly at concentration levels of parts per million. Multiple images of distribution of elements can be obtained on surfaces of 100x100 mm and a spatial resolution of up to 0.2 mm2 per pixel, with a spectral capture time up to 1 ms per point. This system has proven to be highly efficient for the XRF mapping of elements in large biological samples, achieving comparables results to those obtained by SR-μXRF. Thus, images of As and Cu accumulation in renal cortex of arsenic-exposed rats were obtained by both methodologies. However, the new imaging system enables the XRF scanning in few minutes, whereas SR-μXRF required several hours. These and other advantages as well as the potential applications of this system, will be discussed.
Fil: Figueroa, Rodolfo. Universidad de la Frontera; Chile
Fil: Lozano, E.. Instituto Nacional del Cancer; Chile
Fil: Bongiovanni, Guillermina Azucena. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnol.conicet - Patagonia Norte. Instituto de Investigación y Des. En Ing. de Procesos, Biotecnología y Energias Alternativas. Idepa - Subsede San Antonio Oeste; Argentina
Subject
XRF-Imaging
biological samples
multi-elemental mapping
Tecnología de Laboratorios Médicos
Ingeniería Médica
INGENIERÍAS Y TECNOLOGÍAS
Access level
Open access
License
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repository
CONICET Digital (CONICET)
Institution
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identifier
oai:ri.conicet.gov.ar:11336/18598