A quantitative assessment of the depth sensitivity of an optical topography system using a solid dynamic tissue-phantom.

Abstract:

:A solid dynamic phantom with tissue-like optical properties is presented, which contains seven discrete targets impregnated with thermochromic pigment located at different depths from the surface. Changes in absorption are obtained in response to localized heating of the targets, simulating haemodynamic changes occurring in the brain and other tissues. The depth sensitivity of a continuous wave optical topography system was assessed successfully using the phantom. Images of the targets have been reconstructed using a spatially variant regularization, and the determined spatial localization in the depth direction is shown to be accurate within an uncertainty of about 3 mm down to a depth of about 30 mm.

journal_name

Phys Med Biol

authors

Correia T,Banga A,Everdell NL,Gibson AP,Hebden JC

doi

10.1088/0031-9155/54/20/016

subject

Has Abstract

pub_date

2009-10-21 00:00:00

pages

6277-86

issue

20

eissn

0031-9155

issn

1361-6560

pii

S0031-9155(09)22154-3

journal_volume

54

pub_type

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