Given a text passage, come up with an appropriate title for it. The title should accurately represent what the main focus of the passage is. The title of a passage may be present in the first few sentences of the passage and/or be referred to multiple times in the passage. The title should be 1-5 words long.

Input: Consider Input: For medical purposes , X-ray filters are used to selectively attenuate , or block out , low - energy rays during x-ray imaging ( radiography ) . Low energy x-rays ( less than 30 keV ) contribute little to the resultant image as they are heavily absorbed by the patient 's soft tissues ( particularly the skin ) . Additionally , this absorption adds to the risk of stochastic ( e.g. cancer ) or non stochastic radiation effects ( e.g. tissue reactions ) in the patient . Thus , it is favorable to remove these low energy X-rays from the incident light beam . X-ray filtration may be inherent due to the X-ray tube and housing material itself or added from additional sheets of filter material . The minimum filtration used is usually 2.5 mm aluminium ( Al ) equivalent , although there is an increasing trend to use greater filtration . Manufacturers of modern fluoroscopy equipment utilize a system of adding a variable thickness of copper ( Cu ) filtration according to patient thickness . This typically ranges from 0.1 to 0.9 mm Cu .

Output: X-ray filter


Input: Consider Input: In the early 1960s , the Nashville sound began to be challenged by the rival Bakersfield sound on the country side and by the British Invasion on the pop side ; compounding these problems were the sudden deaths , in separate airplane crashes , of Patsy Cline and Jim Reeves , two of the Nashville Sound 's biggest stars . Nashville 's pop song structure became more pronounced and it morphed into what was called Countrypolitan - a smoother sound typified through the use of lush string arrangements with a real orchestra and often , background vocals provided by a choir . Countrypolitan was aimed straight at mainstream markets and it sold well throughout the later 1960s into the early 1970s . Among the architects of this sound were producers Billy Sherrill ( who was instrumental in shaping Tammy Wynette 's early career ) and Glenn Sutton . Artists who typified the countrypolitan sound initially included Wynette , Glen Campbell ( who recorded in Hollywood and not Nashville ) , Lynn Anderson , Charlie Rich , and Charley Pride , the latter being a rare example of a top - selling African - American country performer .

Output: Nashville sound


Input: Consider Input: Goodfellas ( stylized as GoodFellas ) is a 1990 American crime film directed by Martin Scorsese . It is an adaptation of the 1986 non-fiction book Wiseguy by Nicholas Pileggi , who co-wrote the screenplay with Scorsese . The film narrates the rise and fall of mob associate Henry Hill and his friends and family over a period from 1955 to 1980 .


Output: Goodfellas