First developed by the United States in the early 1950s, the hydrogen or thermonuclear bomb is perhaps a thousand times more powerful than a uranium-or plutonium-based fission bomb, making it effectively the nuclear weapon's nuclear weapon.n a fusion reaction, two atoms of the lightest element, hydrogen, fuse to create one atom of helium, the next-lightest element â and release much more energy.
Clival tumors were found to enhance intensely. A clivus of very low signal intensity (signal void) on T1- or T2-weighted images was always abnormal. The clivus with marrow reconversion was uniformly hypointense relative to the pons on T1-weighted images and isointense relative to normal marrow on T2-weighted images.
T waves are negative in leads I, II, III, aVF, V3-V6. The. T is upright (abnormal) in aVR and T is low in aVL. The. rhythm is sinus and the intervals including (notably) the. QT, are normal. The differential diagnosis rests between viral pericarditis. and/or viral myocarditis. The herpes zoster virus, agent. for varicella, is known to produce cardiac and pericar-. dial inflammation.