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Dependency of image quality on acquisition protocol and image processing in chest tomosynthesis-a visual grading
Masoud Jadidi1, Magnus Båth2,3, Sven Nyrén4,5
11 Departments of Clinical Science, Intervention and Technology, Karolinska Institutet , Stockholm , Sweden.
The British Journal of Radiology
|March 23, 2018
Summary
Shorter acquisition times (6.3s) in digital tomosynthesis (DTS) yielded better image quality than the 12s protocol. Standard DTS processing also showed an advantage over advanced processing for improved demarcation and reduced disturbance in chest imaging.
Area of Science:
- Medical Imaging
- Radiology
- Diagnostic Imaging
Background:
- Digital tomosynthesis (DTS) is an advanced imaging technique used in chest radiography.
- Optimizing acquisition protocols and post-processing is crucial for maximizing image quality and diagnostic accuracy.
Purpose of the Study:
- To compare image quality between two chest DTS protocols with different acquisition times (6.3s vs. 12s).
- To evaluate the impact of standard versus advanced post-processing on image quality in chest DTS.
Main Methods:
- Twenty patients underwent chest DTS imaging using two protocols (6.3s and 12s acquisition times).
- Images were processed using standard DTS and advanced optimized methods.
- Five observers assessed image quality based on predefined criteria using visual grading characteristics (VGC).
Main Results:
- The 6.3s acquisition protocol demonstrated statistically significant advantages in demarcation and disturbance compared to the 12s protocol.
- Standard DTS processing showed a slight but significant advantage over advanced processing for demarcation and disturbance.
- Image quality was significantly affected by protocol selection, with the 6.3s protocol and standard processing performing better.
Conclusions:
- A 6.3s acquisition time protocol offers improved image quality over the 12s protocol for chest DTS.
- Standard DTS processing is preferable to advanced processing for enhancing image quality in this system.
- Vendor-recommended protocols may not always represent the optimal choice for achieving superior image quality.
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