1. Radiation absorption and HU number approximate to human body, in an arms-abducted position suits the CT.
2.Simulated tumors and other targets can be attached at any points in the lung fields.
3. Wide variety of uses in interpretation training, anatomical education, evaluation and assessment of devices and other research.

PH-1 is used to study in a database of CT  scans with different scanners and protocols, as a resource for assessment of lung nodule size estimation method.