2. What is the dose delivered to soft tissue in different depths of the tissue (D1, D2, D3 and D4) by a 0.1 W/cm2 beam consisting of 4 MeV x-ray photons exposing the patient for 1 min? The linear attenuation coefficient of the tissue (u) is 0.1 cm-?, mass-energy absorption coefficient is 0.03 cm/g. The beam width at the surface is 10 cm and the SSD is 100 cm. (25 marks) S t = 1 min 1 cm 1 cm 1 cm 1. = 0.1 W/ cm D = ? D = ? D = ? D = ? 1 cm 2. What is the dose delivered to soft tissue in different depths of the tissue (D1, D2, D3 and D4) by a 0.1 W/cm2 beam consisting of 4 MeV x-ray photons exposing the patient for 1 min? The linear attenuation coefficient of the tissue (u) is 0.1 cm-?, mass-energy absorption coefficient is 0.03 cm/g. The beam width at the surface is 10 cm and the SSD is 100 cm. (25 marks) S t = 1 min 1 cm 1 cm 1 cm 1. = 0.1 W/ cm D = ? D = ? D = ? D = ? 1 cm