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Quality analysis of DSA equipment.
M A Thijssen1, H O Thijssen, J L Merx
1Department of Physics, University Hospital Nijmegen, The Netherlands.
Neuroradiology
|January 1, 1988
Summary
Image quality and radiation dose in digital subtraction angiography (DSA) vary significantly across hospitals. Improvements in equipment, image storage, and hard copy production are recommended for better diagnostic imaging and patient safety.
Area of Science:
- Medical Imaging
- Radiology
- Health Physics
Background:
- Digital subtraction angiography (DSA) is a crucial diagnostic tool.
- Variations in DSA equipment performance and radiation dose are suspected.
- Quality assurance is essential for optimizing medical imaging procedures.
Purpose of the Study:
- To assess image quality and radiation dose of DSA equipment in multiple hospitals.
- To compare DSA with conventional angiography (CA) regarding radiation dose.
- To identify factors influencing image quality and dose for improvement recommendations.
Main Methods:
- Image quality assessed using a contrast-detail (CD) phantom.
- Radiation dose measured using thermo-luminescence dosimeters (TLD) on a human phantom and patients.
- Simulated DSA examinations of the aortic arch and brachiocephalic arteries were performed.
- Comparisons made between DSA and CA, and between phantom and patient studies.
Main Results:
- Significant variations in image quality were observed across different hospitals.
- In-hospital, monitor images demonstrated superior quality compared to hard copy images.
- Image quality differences correlated with radiation dose, image storage techniques (digital vs. analogue), and hard copy imager quality.
Conclusions:
- Substantial disparities exist in DSA image quality and radiation dose management.
- Recommendations are proposed for enhancing DSA equipment performance and implementing quality control measures.
- Optimizing DSA procedures can lead to improved diagnostic accuracy and reduced patient radiation exposure.