Automatic quantification package (Hone Graph) for phantom-based image quality assessment in bone SPECT: computerized automatic classification of detectability.

Objective: We previously developed a custom-design thoracic bone scintigraphy-specific phantom ("SIM bone phantom") to assess image quality in bone single-photon emission computed tomography (SPECT). We aimed to develop an automatic assessment system for imaging technology in bone SPECT and demonstrate the validity of this system.

Methods: Four spherical lesions of 13-, 17-, 22-, and 28-mm diameters in the vertebrae of SIM bone phantom simulating the thorax were filled with radioactivity (target-to-background ratio: 4).