Which of the following best describes how a computed tomography scanner produces its images?
- A.Strong magnetic fields align hydrogen nuclei in the body
- B.High frequency sound waves are reflected off tissue
- C.A rotating X-ray system with digital detectors, reconstructed by computer algorithms
- D.Radioactive tracers injected into the bloodstream are tracked
Correct answer
Explanation
The correct answer is a rotating X-ray system with digital detectors, reconstructed by computer algorithms. In a computed tomography machine the X-ray source turns around the patient while detectors record the radiation that passes through, and software then assembles those readings into cross-sectional pictures of the structures inside the body. Precise engineering, careful integration of the imaging parts and rigorous calibration are all needed so that the images are accurate and the patient remains safe. Option A describes magnetic resonance imaging, which uses magnetic fields rather than X-rays. Option B describes ultrasound, which relies on reflected sound waves. Option D describes nuclear medicine scanning, where a tracer is followed inside the body. Knowing which physical principle belongs to which machine is a common requirement in science sections.
Read the full article: TDB Supports Development of Indigenous 32-Slice CT Scanner
Practice Questions
The Technology Development Board functions under which department?
- A.Department of Biotechnology
- B.Department of Science and Technology
- C.Department of Health Research
- D.Department of Pharmaceuticals
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The Board sits within that department and finances Indian enterprises that are developing and commercialising home grown technology, which is why it was the body to sign an agreement for an indigenous computed tomography scanner.
Read the full explanation →Which company has been supported for the development of an indigenous 32-slice CT scanner?
- A.Panacea Medical Technologies Private Limited
- B.Bharat Electronics Limited
- C.Hindustan Antibiotics Limited
- D.HLL Lifecare Limited
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Building on its strength in high precision imaging, the firm has taken up the design, development and deployment of a diagnostic scanner, and the agreement with the Board will fund that effort through to commercial sale.
Read the full explanation →Which of the following was NOT among the five sovereign commitments outlined at the workshop?
- A.Energy independence
- B.Net-zero emissions and industrial decarbonisation
- C.Universal energy access
- D.Nuclear fuel self-sufficiency
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Professor R. R. Sonde of IIT Delhi-Abu Dhabi, the Guest of Honour, outlined five sovereign commitments covering energy independence, economic development, net-zero emissions and industrial decarbonisation, universal energy access, and a clean environment.
Read the full explanation →Where was the workshop commemorating National Hydrogen and Fuel Cell Day held?
- A.IIT Delhi, New Delhi
- B.IIT Madras Research Park, Chennai
- C.IISc Bengaluru
- D.ARCI campus, Hyderabad
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The correct answer is the IIT Madras Research Park in Chennai, where the 9th Workshop on Recent Advancements in Hydrogen Value Chain was held on 13 October 2026.
Read the full explanation →The 9th Workshop on Recent Advancements in Hydrogen Value Chain was organised by which centre?
- A.ARCI, the International Advanced Research Centre for Powder Metallurgy and New Materials
- B.National Institute of Solar Energy
- C.Central Power Research Institute
- D.National Physical Laboratory
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It organised the workshop at the IIT Madras Research Park in Chennai to commemorate National Hydrogen and Fuel Cell Day, and about 150 delegates from academia, research institutes and industry attended.
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