Corrected TIMI Frame Count (cTFC)
Corrected TIMI frame count (Gibson 1996): cine frames for contrast to reach the distal landmark, normalized to 30 frames/s and divided by 1.7 for the LAD; higher = slower coronary flow.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Frame count to distal landmark
- 34
- Acquisition frame rate
- 30 frames/s
- Vessel
- LAD (÷ 1.7)
Result: Corrected TIMI frame count 20 — normal flow (~21).
The tool opens with these values already filled in. Replace them with your own.
What the result means
- ~21 +/- 3
- Normal coronary flow.
- > ~27
- Slow coronary flow (frames to distal landmark, normalized to 30 fps; LAD / 1.7). A flow index, not a diagnosis.
What you enter
- Frame count to distal landmark
- Acquisition frame rate
- Vessel
How this is calculated
Gibson CM, Cannon CP, Daley WL, et al. TIMI frame count: a quantitative method of assessing coronary artery flow. Circulation. 1996;93(5):879-888. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.