Flexibly usable couch top for rt applications

A couch top, comprising:

• an underside for laying the couch top on a patient table of a patient couch of a medical imaging modality;
• and
• an upper side for laying a patient on the couch top;
• wherein
• the underside and the upper side extend along a length in a longitudinal direction from an upper edge to a lower edge,
• the underside and the upper side extend across a width in a transverse direction from a left-hand edge to a right-hand edge,
• the couch top has a left-hand basic fixing element and a right-hand basic fixing element,
• each of the left-hand basic fixing element and the right-hand basic fixing element have a respective base member and a respective projection,
• the left-hand basic fixing element is fastened to the couch top with the respective base member in a vicinity of the left-hand edge,
• the right-hand basic fixing element is fastened to the couch top with the respective base member in a vicinity of the right-hand edge,
• the respective base member of the left-hand basic fixing element and the respective base member of the right-hand basic fixing element do not protrude beyond the underside, whereas the respective projection of the left-hand basic fixing element and the respective projection of the right-hand basic fixing element do protrude beyond the underside, and
• the left-hand basic fixing element and the right-hand basic fixing element are fastened to the couch top such that a spacing between the left-hand basic fixing element and the right-hand basic fixing element is variable in the transverse direction.