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.
Ureterovesical junction (UVJ) obstruction refers to a blockage to this area. The obstruction impedes the flow of urine down to the bladder, causing the urine to back up into and dilate the ureters and kidney (megaureter and hydronephrosis).Unilateral UVJ obstruction is the second most common prenatally detected obstructive disease, often picked up on maternal ultrasounds during pregnancy.reterovesical junction (UVJ) obstruction refers to a blockage to this area. The obstruction impedes the flow of urine down to the bladder, causing the urine to back up into and dilate the ureters and kidney (megaureter and hydronephrosis).