CENTRO DE INVESTIGACIONES EN FISICA E INGENIERIA DEL CENTRO DE LA PROVINCIA DE BUENOS AIRES
Unidad Ejecutora - UE
Study of inks used in biomedical optics phantoms: stability and ageing
P. PARDINI; M. V. WAKS SERRA; H. F. RANEA SANDOVAL; J. A. POMARICO; D. I. IRIARTE
JOURNAL OF NEAR INFRARED SPECTROSCOPY
N I R PUBLICATIONS
Año: 2015 vol. 23 p. 219 - 219
Inks are the most common absorbers added in phantoms for biomedical optics experiments. Due to the small quantities required, it is usual to prepare dilutions in distilled water and to store them for future use. However, they may degrade with time. This work investigatesthe stability, over a 60-day period, of various types of ink dilutions as a component used in tissue-mimicking phantoms. For this purpose, the optical properties, particularly the absorption coefficient, of a diffusive phantom fabricated with various pre-diluted inkshave been determined using time-resolved experiments, for the period of time under investigation. Two commercial India inks were studied, namely Rotring® and Higgins®, as well as a third type, a black ink-jet printer ink (Powertec®). Results suggest that all inkdilutions suffer from ageing, affecting the reproducibility of the optical properties of the phantoms. For the investigated period, this effect was more noticeable for the India inks, but almost negligible for the ink-jet printer ink.