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Intracranial 2D and 3D DSA with flat panel detector of the direct conversion type: initial experience
Yoshihisa Hatakeyama1, Shingo Kakeda, Yukunori Korogi
1Department of Radiology, University of Occupational and Environmental Health School of Medicine, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, 807-8555, Japan.
European Radiology
|May 19, 2006
Summary
The flat panel detector (FPD) system offers superior 2D digital subtraction angiography (DSA) image quality for intracranial vessels compared to conventional systems. This advanced FPD technology also enables high-quality 3D DSA imaging with significantly reduced radiation doses.
Area of Science:
- Medical Imaging
- Radiology
- Neurovascular Imaging
Background:
- Conventional image intensifier (I.I.)-TV systems are standard for digital subtraction angiography (DSA).
- Assessing advanced imaging technologies like flat panel detectors (FPD) is crucial for improving diagnostic capabilities and patient safety in neurovascular procedures.
Purpose of the Study:
- To compare the 2D DSA image quality between a direct conversion FPD system and a conventional I.I.-TV system.
- To evaluate the efficacy of 3D DSA using the FPD system for depicting intracranial vessels.
- To assess radiation dose reduction associated with the FPD system.
Main Methods:
- Prospective study of 15 patients undergoing 2D DSA with both FPD and I.I.-TV systems.
- Radiation dose measurements using a phantom for both systems.
- Independent radiologist evaluation of 2D DSA, 3D DSA (MIP and VR images) using a 5-point scale for intracranial vessel visualization.
Main Results:
- The FPD system demonstrated a significant dose reduction (approx. 85% for DSA, 9% for fluoroscopy) compared to the I.I.-TV system.
- 2D DSA with the FPD system showed significantly superior visualization of peripheral and perforating intracranial vessels (p<0.05).
- 3D DSA images generated with the FPD system provided sufficient visualization of small vessels, including perforating ones.
Conclusions:
- The direct conversion FPD system surpasses conventional I.I.-TV systems in visualizing small intracranial vessels.
- The FPD system achieves this superior visualization while significantly reducing radiation dose.
- High-quality 3D DSA images with excellent spatial resolution can be generated using the FPD system, aiding precise neurovascular assessment.
