Abstract: The present invention relates generally to a system and a method to detect small molecules, also known as Volatile Organic Compounds (VOCs), in a fluid sample. The system and method can also be applied to diagnose a disease state of an organism by detecting a unique combination of metabolites produced by an organism.

Abstract: Systems and methods are disclosed to determine dimensions of an imaged object: determining a scale factor for each pixel of the imaged object; receiving a dimensional specification between two or more points on the object; determining a pixel count between the two or more points; and determining the actual dimension of the object using the pixel count and scale factor.

Abstract: A shield assembly for protecting an exposed surface of an injector. The shield assembly includes a shield body having a front and back walls and at least one plenum therebetween, and at least one conduit coupled for delivering a gaseous substance to the plenum. The front wall includes a plurality of apertures for removing the gaseous substance from the plenum. The apertures are configured to provide a substantially uniform distribution of the gaseous substance across an exterior region of the front wall. At least one support member extends between the front and back walls, and is positioned to transfer forces from the front wall to the back wall to thereby reinforce the front wall against collapse.