AIIMS 2019 Physics Medical Imaging MCQ Question

In positron emission tomography (PET), the isotope fluorine-18 (F¹⁸) undergoes beta decay, emitting a positron (β⁺) and a gamma ray (γ) as it transforms into oxygen-18 (O¹⁸). This process is crucial for detecting metabolic activity in tissues, making it valuable for diagnosing conditions such as cancer, heart problems, and brain disorders. Options A, C, and D are incorrect because they mistakenly refer to gamma rays, alpha rays, and an undefined "r rays," respectively, which do not accurately describe the emissions associated with F¹⁸ decay. Understanding the specific emissions involved in PET imaging is essential for grasping how this technique functions in medical diagnostics.