Esophageal cancer: evaluation with triple-phase dynamic CT--initial experience
Shigeaki Umeoka1, Takashi Koyama, Kaori Togashi
1Department of Diagnostic Imaging and Nuclear Medicine, Graduate School of Medicine, Kyoto University, and Department of Radiology, Kyoto University Hospital, Japan.
Radiology
|April 20, 2006
Summary
The second arterial phase of dynamic CT best visualizes esophageal cancer, showing higher tumor enhancement and conspicuity. This finding aids in accurate diagnosis and staging of this disease.
Area of Science:
- Radiology
- Oncology
- Medical Imaging
Background:
- Esophageal cancer diagnosis relies on accurate imaging.
- Dynamic contrast-enhanced CT is a key tool.
- Optimizing CT protocols improves diagnostic yield.
Purpose of the Study:
- To determine the optimal phase for visualizing esophageal cancer using triple-phase dynamic CT.
- To compare the conspicuity and enhancement of tumors across different CT phases.
Main Methods:
- Prospective study of 28 patients with confirmed esophageal cancer.
- Triple-phase dynamic CT (arterial and venous phases) was performed.
- Qualitative and quantitative image analysis compared tumor visualization across phases.
Main Results:
- The second arterial phase demonstrated the highest tumor conspicuity and attenuation.
- 30 out of 31 lesions were identified in the second arterial phase.
- Significantly higher tumor-to-normal wall attenuation differences were observed in the second arterial phase (P<.01).
Conclusions:
- The second arterial phase of dynamic CT is optimal for esophageal cancer visualization.
- This phase provides superior enhancement and conspicuity for accurate diagnosis.
- Findings support the use of the second arterial phase in esophageal cancer imaging protocols.
