Liquid Crystals: Frontiers In Biomedical Applications

Frederick Y. Biga, Francois I. Luks, John W. McMurdy and Gregory P. Crawford
There are things known and there are things unknown, and in between are the doors of perception.
Aldous Huxley, English Novelist and Critic, 1894 1963
A major component of the medical diagnostic process involves the visual inspection of x-rays, computed axial tomography (CT) scans, ultrasound and, in some cases, photographed images. Moreover, surgical treatments increasingly rely on captured and displayed images, as more and more operations are performed endoscopically (with the use of telescopes introduced inside body cavities). An accurate presentation of the information captured in medical examinations is vital to ensuring effective diagnostic decisions are made. In addition to considering the performance of various parameters of a display and the ambient conditions, it is important to take into account the strengths and limitations of the human eye when assessing the performance of a display system. This chapter will bring together the display technologies available for medical imaging applications and highlight some of the key features and characteristics that need to be considered for high-fidelity image delivery systems.
Electronic media provides an effective means to acquire, view, analyze and distribute medical images in a highly efficient manner [Samei et al. (2005)]. Electronic display systems are replacing antiquated films developed in darkrooms or printed with laser image recorders and viewed on light boxes, such as radiographs, ultrasonographs, computed tomography (CT) scans, magnetic resonance imaging (MRI) scans and digital subtraction angiographs (DSA) [Lee et al.