Optimizing coronary CT angiography in patients with delayed contrast arrival using a free-breathing, high-threshold bolus-tracking protocol
Yan Zhang, Ying Wang, Jing Li, Yixuan Zou, Aihui Di, Ning Lang, Huishu Yuan · 2026
Read Optimizing coronary CT angiography in patients with delayed contrast arrival using a free-breathing, high-threshold bolus-tracking protocol by Yan Zhang, Ying Wang, Jing Li, Yixuan Zou, Aihui Di, Ning Lang, Huishu Yuan (2026) in the Tower of Babel, a free online library of public-domain works preserved in clean, searchable text. No sign-up. The full text is served as a plain-text file at a predictable URL, where text is present: https://antarctic-labs.com/tower-of-babel/pmc-13476204.txt.
Description
Coronary CT angiography can fail when contrast dye arrives late, firing at the wrong phase and lighting vessels unevenly. The seven authors split one hundred fifty-nine patients at random between two protocols. One used held breath, a one hundred HU trigger, and a six point eight second delay. The other used free breathing, a three hundred HU trigger, and a two second delay. Patients were grouped by whether dye arrival passed fifteen seconds.
In the late group, that protocol raised coronary attenuation. It cut the variation coefficient from sixteen point seven three percent to eleven point two eight percent. Excellent segments rose from eighty-six point eight percent to ninety-four point two percent. Best-phase scans doubled, and late-phase scans halved. Scores were higher across all major arteries. The authors call the free-breathing plan a kinder choice when blood moves slowly or breath-holding is weak.
Catalog record
| CREATOR | Yan Zhang, Ying Wang, Jing Li, Yixuan Zou, Aihui Di, Ning Lang, Huishu Yuan |
|---|---|
| YEAR | 2026 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 44 KB |
| VERSION | 1.0 |
| LICENSE | CC BY 4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |