While such portable systems have been used worldwide with good reproducibility levels, portable detection systems can be considered still in their infancy.
The inherent static field gradients of portable systems have, however, limited such studies to imaging of slices perpendicular to the main gradient; full volume imaging in transportable, open systems has not been actively pursued.
Consequently, a number of portable systems have been designed to acquire metabolic gas measurements during field studies.
A portable system has also been fabricated in which potential change directly relates to iodine number of the edible oils, which is directly displaced on Liquid Crystal Display (LCD).
The performance of the portable system has been evaluated using diclofenac, hydrogen peroxide and metals (Pb, Cu, and Hg) as model analytes.
NIRS may thus have useful applications in daily life, and portable NIRS systems have recently been marketed commercially.
The image quality, system functionality, ease of use, and relatively low cost of portable ultrasound systems have made them more accessible for education and clinical practice.
The small size and light weight of portable ultrasound systems have made them accessible for use in virtually every patient care setting from the hospital and outpatient clinic to remote communities with limited medical services, to the site of a disaster, the battlefield, and even outer space [27 33].
Emergency supplies provided by UNICEF ranging from tents to water purification tablets, hygiene kits, blankets, health kits, cooking sets, and portable water systems have been pre-positioned in six key departments throughout Haiti (South, SouthEast, North, NorthOuest and Central).
In addition to portable XRF, the availability of portable Raman systems has also increased in recent years.
To be able to be used in discipline-specific field studies, these portable gas analysis systems have to be not only small and unobtrusive, but also reliable and valid.
