A method is disclosed for determining bone mineral density values of an object. In an embodiment, the method includes acquisition of first two-dimensional projection overview image data of the object to be examined in an image detail with a first X-ray energy acquisition of at least second two-dimensional projection overview image data of the object to be examined in an image detail with at least one different second X-ray energy determining a bone overview image data record using the first and second projection overview image data determining at least one specific evaluation region of the image detail using the bone overview image data record and determining a bone mineral density value for the specific evaluation region of the image detail using the image data of the bone overview image data record in the specific evaluation region. A computerized tomography system for implementing a method is also disclosed.
