GATE Medical Imaging Systems: Nuclear Imaging – Previous Year Questions
9 GATE previous year questions on Nuclear Imaging (Medical Imaging Systems, Biomedical Engineering) with answers and explanations, from every paper.
- GATE 2020 BM Q29 – NaI crystals detect 120 keV gamma rays. If their half-value layer is 0.2 cm, what percentage of gamma rays passes through 1 cm of NaI, to one decimal…
- GATE 2021 BM Q34 – A radionuclide has decay constant 3.22×10⁻⁵ s⁻¹ and activity 6 mCi at 10:30 AM. Find activity at 4:30 PM on the same day, in mCi to two decimals.
- GATE 2021 BM Q64 – A radioisotope has activity 2 mCi, decay constant 3.22×10⁻⁵ s⁻¹ and atomic molar mass 98 g/mol. Avogadro constant is 6.02×10²³ mol⁻¹. Find isotope…
- GATE 2022 BM Q49 – Radionuclide P has half-life four times that of Q. At t=0 both have N₀ atoms. At what time do their activities become equal? Express the answer in…
- GATE 2024 BM Q16 – Which statement is true for PET imaging?
- GATE 2024 BM Q54 – For the source’s ideal inverse-square radiation model, a person one metre from a 4000-curie source receives a specified lethal dose in five minutes.…
- GATE 2025 BM Q16 – Assertion: PET uses radionuclides such as ¹¹C and ¹⁵N to study tissue metabolism. Reason: Positron-emitting nuclides are incorporated into molecules…
- GATE 2025 BM Q25 – 9 6C and 10 6C are , whereas 9 6C and 8 5B are .
- GATE 2026 BM Q62 – The half-lives of ¹¹³ᵐIn and ⁹⁹ᵐTc are 1.7 and 6.0 hours. Their initial sample activities are 100 and 20 GBq respectively. After how many hours are…