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High Resolution 3D Imaging of Ex-Vivo Biological Samples by Micro CT
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Computed Tomography Diagnostic Reference Levels in India: Results from the First National Survey
Philomina Akhilesh1, Sunil Dutt Sharma2, Munir S Pathan1
1Radiological Physics and Advisory Division, Bhabha Atomic Research Centre, Mumbai 400085, India.
Summary
India
Area of Science:
- Medical Imaging
- Radiology
- Radiation Dosimetry
Background:
- Computed tomography (CT) is a widely used diagnostic imaging technique.
- Establishing national diagnostic reference levels (DRLs) is crucial for optimizing radiation doses in medical imaging.
Purpose of the Study:
- To conduct the first nationwide survey of patient radiation doses from adult CT examinations in India.
- To establish national diagnostic reference levels (DRLs) for adult CT examinations in India.
Main Methods:
- Data from 6454 patients across 76 CT facilities in India were analyzed.
- Volume computed tomography dose index (CTDIvol) and dose length product (DLP) were calculated.
- National DRLs were proposed based on the 75th percentile of median dose values.
Main Results:
- National DRLs for India in terms of CTDIvol were established for five adult CT examination categories.
- Indian DRLs in terms of DLP were found to be comparatively higher than international benchmarks.
- Significant variations in radiation doses were observed across facilities, suggesting non-optimized scan protocols.
Conclusions:
- A substantial potential for radiation dose reduction in adult CT examinations in India was identified.
- Higher DLP values indicate the use of unnecessarily long scan lengths in many cases.
- Optimization of scan protocols is recommended to reduce patient radiation exposure.
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