24.3.6—The gamma-ray photons from an annihilation event travel outside the body and

understand that the gamma-ray photons from an annihilation event travel outside the body and can be detected, and an image of the tracer concentration in the tissue can be created by processing the arrival times of the gamma-ray photons.

Use —the gamma-ray photons from an annihilation event travel outside the body and to connect the rule to the data and decision in the question.

This matters because —the gamma-ray photons from an annihilation event travel outside the body and determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply —the gamma-ray photons from an annihilation event travel outside the body and to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: —The gamma-ray photons from an annihilation event travel outside the body and is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.