🦴 Bone Scan Timing + Decayed Activity
Bone-scan delay and decayed activity at imaging.
Clinical takeaway
A=A0·e^(−λt).
Loading calculator…
Paste the link in Slack, Teams, X, or LinkedIn — the preview image comes from this page’s Open Graph card.
When to use
Scheduling and activity check.
How it works
Typical delay 2–4 h; Tc-99m T½ 6.01 h.
Key points
- A=A0·e^(−λt).
References
- SNMMI bone scintigraphy procedure standard
Decision support for licensed clinicians only; not a substitute for clinical judgement, diagnosis or local protocols.
Worked calculation
The values below come from this tool's own example placeholders and are computed server-side with the formula shown on this page, so the arithmetic can be checked quickly. It demonstrates how to substitute values only — it is not clinical advice and not a real case.
| Delay | 3 h |
|---|---|
| Injected activity | 20 |
| unit | mCi |
→A at imaging14.1503mCi
- % remaining：70.75 %
- delay band：Typical 2–4 h
- other：523.5608 MBq
Frequently asked questions
- What is Bone Scan Timing + Decayed Activity?
- Bone-scan delay and decayed activity at imaging.
- How is Bone Scan Timing + Decayed Activity calculated? What is the core formula?
- Typical delay 2–4 h; Tc-99m T½ 6.01 h.
- When is Bone Scan Timing + Decayed Activity used?
- Scheduling and activity check.
- What are the key clinical points for Bone Scan Timing + Decayed Activity?
- A=A0·e^(−λt).
- What are the limits and cautions when using Bone Scan Timing + Decayed Activity?
- For licensed clinicians and clinical researchers. Interpret results with history, investigations and local protocols; not a diagnosis or prescription, and not a substitute for multidisciplinary decision-making or local guidelines.
- How is Bone Scan Timing + Decayed Activity calculated in practice? Can you show a worked example?
- Inputs: Delay 3 h, Injected activity 20, unit mCi → Result: A at imaging 14.1503 mCi（% remaining: 70.75 %, delay band: Typical 2–4 h, other: 523.5608 MBq）
💬 Peer discussion
Licensed clinicians only — about this Tool · Bone scan timing
Do not share identifiable patient information (PHI). Discuss principles and workflow only — not a substitute for clinical judgement.
Loading…