LESION DETERMINATION APPARATUS, SIMILAR CASE SEARCHING APPARATUS, LESION DETERMINATION METHOD, SIMILAR CASE SEARCHING METHOD, AND NON-TRANSITORY COMPUTER-READABLE STORAGE MEDIUM
A lesion determination apparatus includes: a number-of-images acquiring unit configured to acquire and record, on occurrence of a direction change that is either a first state in which a second operation instruction is received immediately after receipt of a first operation instruction or a second state in which the first operation instruction is received immediately after a receipt of the second operation instruction, a number of one-directionally viewed images that is either a number of tomography images continuously viewed in response to continuous first operation instructions including the first operation instruction in the first state or a number of tomography images continuously viewed in response to continuous second operation instructions including the second operation instruction in the second state； and a locality determining unit configured to determine whether the object part is a focal lesion or a diffuse lesion based on a change in the number of one-directionally viewed images.
