In the 1950s roentgenizdat – or X-ray publishing – became a trend in Soviet Union counterculture. ‘Bone music’ and ‘rock on ribs’ are two other terms that describe these bootleg recordings of music from the West, ingeniously cut onto X-ray fi lm discarded by hospitals. This vinyl disc carries an X-ray image of a spine and pelvis – and a 1967 recording that has its own bootleg history: the great cellist Mstislav Rostropovich smuggled it out of the Soviet Union when he was exiled in the 1970s. It is his world premiere performance of the Cello Concerto No. 2 by his teacher and mentor Dmitri Shostakovich, recorded live in the Great Hall of the Moscow Conservatoire with the USSR State Symphony Orchestra under Evgeni Svetlanov. This is its first release on LP.