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Optimisation of multislice computed tomography protocols in angio-CT examinations
S Strocchi1, C Vite, L Callegari
1Fisica Sanitaria, Ospedale di Circolo e Fondazione Macchi, Varese, Italy. fisica.sanitaria@ospedale.varese.it
La Radiologia Medica
|May 5, 2006
Summary
Optimizing multislice computed tomography (MSCT) protocols can significantly reduce radiation exposure. This study demonstrates a 40% effective dose reduction in angio-CT examinations without compromising image quality.
Area of Science:
- Radiology
- Medical Imaging
- Radiation Oncology
Background:
- Multislice computed tomography (MSCT) is crucial for diagnostic imaging.
- Angiographic CT (angio-CT) protocols often involve high radiation doses.
- Optimizing imaging parameters is essential for patient safety.
Purpose of the Study:
- To present a generalizable procedure for optimizing MSCT protocols.
- To reduce radiation effective dose in angio-CT examinations.
- To maintain diagnostic image quality while minimizing patient exposure.
Main Methods:
- Four angio-CT protocols on a GE LightSpeed Plus 4-slice CT scanner were analyzed.
- Effective doses were calculated for patient samples.
- Dose optimization involved standard patient protocols adapted by weight-specific scaling factors.
Main Results:
- Mean effective doses ranged from 18.8 mSv to 28.8 mSv per examination.
- A protocol optimization procedure was developed, including a patient weight-based tube current table.
- Effective dose was reduced by approximately 40% post-optimization.
Conclusions:
- Angio-CT examinations are associated with high radiation doses.
- Radiation doses can be effectively reduced through protocol optimization.
- Image quality is preserved following dose reduction strategies.
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