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Contrast-enhanced CT with saline flush technique using two automated injectors: how much contrast medium does it
Toshiyuki Irie1, Motonao Kajitani, Masayuki Yamaguchi
1Department of Radiology, Institute of Clinical Medicine, University of Tsukuba, Ibaraki, Japan.
Journal of Computer Assisted Tomography
|March 9, 2002
Summary
The saline flush technique in thoracic helical CT prolongs time to peak aortic enhancement (TPAE) by 6 seconds. This method effectively saves 12 ml of contrast medium per scan.
Area of Science:
- Radiology
- Medical Imaging
- CT Scan Optimization
Background:
- Contrast-enhanced computed tomography (CT) is crucial for thoracic imaging.
- Optimizing contrast medium usage is essential for patient safety and cost-effectiveness.
- The saline flush technique is a potential method to reduce contrast volume.
Purpose of the Study:
- To evaluate the volume of contrast medium saved using the saline flush technique.
- To determine the impact of saline flush on the time to peak aortic enhancement (TPAE).
Main Methods:
- Thoracic helical CT scans were performed on five groups (n=25 each).
- Groups received either contrast medium alone or contrast medium followed by varying volumes of saline (6, 12, 25, 50 ml).
- Aortic CT numbers were measured to determine TPAE.
Main Results:
- A statistically significant difference in TPAE was observed across all groups (p < 0.0001).
- Saline flush significantly prolonged TPAE compared to no flush.
- No significant differences in TPAE were found among groups receiving 12 ml or more of saline.
Conclusions:
- The saline flush technique significantly prolongs TPAE by approximately 6 seconds.
- This technique allows for a reduction of 12 ml in contrast medium volume.
- Saline flush is an effective method for contrast medium volume reduction in thoracic CT.