Technological sentences: Intensity-Modulated Radiotherapy (IMRT) is...

[Haihao]

Hi,

Could anybody shed some light on:

Brackets shall be avoided if possible. When necessary, it is recommended that a small stiff cube be used, rigidly mounted to the structure, with machined surfaces drilled and tapped to accept stud mounting.

1. Is it saying: Mounting to Brackets shall be avoided if possible. When unavoidable, it is recommended that a small stiff cube be used, which (the cube) is to be rigidly mounted to the structure that has machined surfaces drilled and tapped accept stud mounting. ?

Intensity-Modulated Radiotherapy (IMRT) is an advanced form of 3D-CRT that uses non-uniform radiation beam intensities incident on the patient that have been determined using various computer-based optimization techniques.

2. Does ‘that’ refer to ‘the patient’?

3. Is the subject of ‘using’ IMRT?

Thank you!

Haihao