The most characteristic ultrasonographic feature of an angiomyolipoma is its echogenicity; however, angiomyolipomas may also cause acoustic shadowing. The echogenic appearance of the tumor is thought to be related to its fat content and the presence of multiple tissue interfaces within it.
Roy Lichtenstein. Roy Fox Lichtenstein (pronounced /ËlÉªktÉnËstaÉªn/; October 27, 1923 â September 29, 1997) was an American pop artist. During the 1960s, along with Andy Warhol, Jasper Johns, and James Rosenquist among others, he became a leading figure in the new art movement. His work defined the premise of pop art through parody.
He described pop art as not 'American' painting but actually industrial painting.. His paintings were exhibited at the Leo Castelli Gallery in New York City. Whaam! and Drowning Girl are generally regarded as Lichtenstein's most famous works, with Oh, Jeff...I Love You, Too...But...arguably third.n 1957, he moved back to upstate New York and began teaching again. It was at this time that he adopted the Abstract Expressionism style, being a late convert to this style of painting. Lichtenstein began teaching in upstate New York at the State University of New York at Oswego in 1958.