Related Stories3D printed heart models to aid doctors arrange for complex ops'Determining obstructive coronary artery disease in women: an interview with Dr. Ladapo, NYU School of MedicinePreclinical Magnetic Particle Imaging: an interview with Professor Jeff Bulte, Johns HopkinsIt consists of overlaying CT images of the lungs used during exhalation and inhalation. A different color is certainly assigned to each little 3D area, referred to as voxels, based on the difference in the density measured between your two scans, which indicates whether tissue is diseased or healthy.So though I am a proponent of small even, limited government – – and although I consider myself to be a libertarian at heart – – there are some special situations where government has a legitimate role. Limiting and regulating large, domineering corporations is one of those roles precisely. While government does not have any right to eliminate our rifles, or gather property or home taxes from us or even to tell us what kind of medical care insurance we must buy, government is exercising the best part when it forces companies to disclose truthful information regarding its products in order that customers can make an informed choice in what they are buying. On a few issues, corporations must be forced by federal government to follow the essential rulesSimilarly, government also offers the best role in forcing companies to not pollute the surroundings.