Optimisation of the lateral lumbar spine projection using an air-gap technique
| Autor: | Bellizzi, Andrea, Zarb, Francis, Malta International Conference: Medical Imaging and Radiotherapy |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: | |
| Popis: | Purpose: To investigate the feasibility of replacing an antiscatter grid with an air gap technique to achieve dose reduction for lateral lumbar spine radiography while maintaining image quality on a direct digital radiography (DDR) system. Methodology: The study comprised of 2 phases. Phase 1 - an experimental study using an anthropomorphic phantom to identify the optimal airgap technique. Phase 2 - lateral projections of the lumbar spine were performed on patients (n=50). Patients were randomly assigned into a control group (n=25 imaged using the antiscatter grid) and an experimental group (n=25 imaged using the airgap technique). The dose area product (DAP) of all examinations was recorded, keeping all other variables constant. Image quality evaluation was performed by 5 radiologists performing Absolute Visual Grading Analysis (VGA) using an image quality score tool, with resultant scores analysed using Visual Grading Characteristics (VGC). Results: A 10cm airgap in conjunction with a source to image distance (SID) of 121cm was found as the optimal airgap technique. The clinical application of this technique resulted in a statistically significant (p0.05). Conclusion: The results imply that replacing the antiscatter grid with an optimal airgap technique in lateral lumbar spine digital radiography, provides a significant dose reduction whilst still maintaining diagnostic image quality. peer-reviewed |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|