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Australian diagnostic reference levels for multi detector computed tomography.

Anna Hayton¹, Anthony Wallace, Paul Marks

¹Diagnostic Imaging and Nuclear Medicine Section, Australian Radiation Protection and Nuclear Safety Agency, 619 Lower Plenty Road, Yallambie, Melbourne, VIC, 3085, Australia. anna.hayton@arpansa.gov.au

Australasian Physical & Engineering Sciences in Medicine

|January 12, 2013

Summary

This summary is machine-generated.

Australian Radiation Protection and Nuclear Safety Agency (ARPANSA) established national diagnostic reference levels (DRLs) for multi-detector computed tomography (MDCT) imaging. These DRLs help optimize radiation dose delivery in diagnostic imaging practices.

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Area of Science:

Medical Physics
Radiological Protection
Public Health

Background:

Diagnostic reference levels (DRLs) are crucial for optimizing radiation dose in medical imaging.
Multi-detector computed tomography (MDCT) is a widely used diagnostic imaging modality.
Establishing national DRLs ensures consistent and safe radiation practices across Australia.

Purpose of the Study:

To establish the first set of national diagnostic reference levels (DRLs) for multi-detector computed tomography (MDCT) in Australia.
To collect and analyze dosimetry data from Australian radiology clinics.
To compare Australian radiation doses with European benchmarks.

Main Methods:

Web-based surveys collected dose length product (DLP) and volume computed tomography dose index (CTDIvol) data for six common MDCT protocols.
Practice reference levels (PRLs) were calculated as the median DLP/CTDIvol from compliant surveys (≥10 patients).
Australian National DRLs were determined as the 75th percentile of PRLs for each protocol and age group.

Main Results:

National DRLs for adult MDCT were established in terms of DLP for Head, Neck, Chest, AbdoPelvis, ChestAbdoPelvis, and Lumbar Spine protocols.
Specific DLP DRLs: 1000, 600, 450, 700, 1200, and 900 mGy·cm, respectively.
Australian MDCT doses were found to be higher than European averages for four out of six protocols.

Conclusions:

Australian National DRLs for adult MDCT have been successfully determined.
The survey highlights potential areas for dose optimization in Australian radiology practices.
Ongoing data collection will allow for periodic updates to DRLs, reflecting technological advancements.