30-day experiment counter
0h 0m 0s
Live cleanly and consistently for one month, log enough data to interpret the change, then compare end labs/stool results against the April baseline. This article is the clinical protocol and interpretation ledger; the [Next Biomed Visit Plan](#sec-test-plan) remains the lab-logistics ledger.
The logging goal is meaningful long-term trends, not perfect symptom capture. Meals, exercise/walks, and stool photos are intended to be registered every time. Weak localized pains may be logged sporadically; stronger, new, persistent, or unusual pains matter more and should be logged when possible.
The experiment is not trying to prove one narrow mechanism. It is designed to separate four tracks that currently overlap: iron availability, occult blood, post-meal bloating/motility, and reactive inflammation/coagulation.
## Current signal
Day-0 state from the first Tracker observation, **2026-04-26 14:28 Cambodia**:
| Signal | Baseline detail |
|---|---|
| Start conditions | After breakfast and two coffees; bloating already present on waking. |
| Bloating | 5/10 at start. |
| Localized pain | 1/10; one sudden far-left abdominal pain episode around belly-button height, lasting seconds. |
| Recent confounders | Beer three nights in a row; roughly 30 cigarettes in the prior 24 hours. |
| Exposure reset | Last cigarette at experiment start; smoking stops cold turkey. |
| Working hypothesis | Beer/alcohol may be a major bloating amplifier, but the month should show the pattern rather than assume it. |
The 2026-04-19/20 blood and stool results remain the practical baseline for most markers: ferritin 54.01 with low serum iron 11.64, derived TSAT about 19%, normal hemoglobin 14.4, platelets 494, WBC 13.1, positive FOB/stool RBCs, and calprotectin normalized to 13.3.
Baseline Biomed day-0 testing is now logged across **2026-04-26/27**. Key additions: reticulocyte 1.0% normal; fibrinogen 3.7 g/L high-normal; fasting glucose 99 mg/dL with insulin 4.4 µIU/mL gives HOMA-IR about 1.08; urine clean; IgG 1299 and IgM 72.5 normal; hemoglobin electrophoresis normal. The IgG/IgM/urine block is reassuring but is an IgA side quest, not the core experiment. Hemoglobin electrophoresis does not replace serum protein electrophoresis for the IgA band-pattern question.
A **2026-05-12 midpoint blood checkpoint** has been added as directional context, not a clean comparator. Unlike the first experiment-day labs and the planned final labs, it was improvised around 14:00, roughly 1 hour after a meal and coffee. It is still useful: WBC normalized to 8.2, CRP stayed normal at 2.71, platelets improved to 452 but remain high, hemoglobin eased to 13.6, ferritin fell to 43.28, and TSAT improved to 27.7%. Interpret it as mid-experiment signal/noise.
The **2026-05-27/28 end summary** is directionally better after the completed zero-alcohol/zero-smoking month and a final-week coffee-reduction/tea-substitution attempt. Blood-side: ferritin rose to **61.60**, TSAT recovered to **33.4%**, WBC stayed normalized at **7.7**, CRP stayed normal at **2.52**, and platelets improved to **444** — just below the common 450 thrombocytosis threshold but still above Biomed's reference range. Stool-side: FOB became **negative** and stool RBCs were **absent** on 2026-05-28. This strengthens the practical hypothesis that alcohol-plus-smoking periods destabilize gut symptoms, iron recovery, and reactive/inflammatory markers, and it cools the April occult-blood branch. It does **not** prove alcohol alone caused the April positive stool test, and recurrence rules still apply if visible blood, iron decline, or repeat stool positivity returns.
Tracker context before the final-week phase: coffee was still being logged through **2026-05-19**, and 2026-05-12/13/15 observations linked coffee temporally with bloating or brief abdominal pain. The final-week log then shows tea substitution plus coffee exceptions on **2026-05-21**, **2026-05-23**, **2026-05-24**, **2026-05-25**, and **2026-05-26**. That does not prove coffee is causal, and it means the final-week phase must be analyzed as reduced coffee with exceptions — not as a clean coffee-free trial.
## Decision questions
| Question | Main evidence after 30 days | Why it matters |
|---|---|---|
| Did iron availability improve? | Ferritin, iron, TIBC/TSAT, hemoglobin, reticulocyte | Tests cleaner intake, reduced coffee/tea timing, alcohol abstinence, and occult-loss pressure. |
| Did the occult-blood signal clear? | FOB, stool RBC/direct exam, ferritin/TSAT trend | Keeps bleeding-source logic separate from bloating. |
| Did bloating improve? | Tracker bloating score, stool photos, meal gaps, abdomen-circumference deltas | Tests meal timing, alcohol removal, reduced-coffee/coffee-exception days, gut load, MMC/SIBO/SUDD branch. |
| Did reactive markers fall? | WBC, platelets, fibrinogen, CRP/ESR | Tests whether smoking/alcohol/gut irritation explained part of the inflammatory/thrombotic pattern; blood-side markers improved by the final summary, but platelet persistence remains its own branch. |
| Did passive physiology improve? | Apple Health sleep, resting HR, HRV, steps/exercise | Adds context without turning the month into manual data entry. |
## Protocol rules
| Rule | Practical definition | Interpretation value |
|---|---|---|
| No alcohol | Zero beer/wine/spirits for the 30-day window. | Removes a major gut-barrier, sleep, inflammation, and bleeding-risk confounder. |
| No smoking | Zero cigarettes; log any slip immediately. | Removes a major vascular and gut-motility confounder. |
| Log every non-water intake | Meals, snacks, tea, coffee slips, juice, soda, supplements with caloric drinks, and alcohol/smoking slips. | Water-only intervals are inferred from gaps between logged non-water/caloric events. |
| Meal spacing | Aim for 4-5 hour water-only windows when practical. | Tests the MMC/meal-spacing hypothesis for bloating. |
| 24-hour fast | Deferred during the final week and before day-30/31 labs. | Kept the final labs interpretable and avoided mixing the coffee-reduction attempt with fasting/re-feeding effects. |
| No 48-72 hour fast during clean month | Longer fasts were deferred until after day-30/31 labs unless a clinician specifically supervised a separate protocol. | Longer fasting adds avoidable lean-mass, sleep, mood, uric-acid, lipid/ApoB, inflammatory/platelet, bowel-output, and refeeding noise, and would blur the main no-smoking/no-alcohol/meal-spacing experiment. |
| Final-week coffee-reduction phase | Planned from 2026-05-20 through the final labs as no coffee with tea allowed, but Tracker shows coffee exceptions on 2026-05-21, 2026-05-23, 2026-05-24, 2026-05-25, and 2026-05-26. | Preserves a useful reduced-coffee/tea-substitution signal, but it is not a clean coffee-free trial for bloating, sleep/HR, pain timing, or iron-absorption analysis. |
| Tea/iron timing | Log each tea type and rough size; keep tea away from iron-focused meals when practical, ideally 1-2 hours after meals. | Tea polyphenols can still inhibit non-heme iron absorption; stable tea use reduces caffeine-withdrawal noise while preserving the iron branch. |
| Coke Zero / diet-soda avoidance | Avoid Coke Zero, diet cola, and other artificial-sweetened carbonated drinks while the symptom signal is live. If accidentally consumed, log exact drink, volume, timing, and symptom timing. | Removes a plausible same-day bloating/ache trigger and keeps coffee-reduction analysis cleaner. |
| Vegetarian iron focus | Lentils/beans/tofu/greens/seeds plus vitamin-C pairing when practical. | Gives the iron branch a fair test without jumping straight to iron supplements. |
| Apple Watch coverage | Keep charged, worn, synced, and configured for Sleep/Vitals/heart data; record real workouts deliberately. | Adds sleep, HR, HRV, respiratory rate, SpO2/wrist-temperature if available, exercise and steps context. |
| Stool photos | Photograph bowel movements before flushing when practical. | Creates a stool-appearance record for consistency/color review. |
| Trend-consistent logging | Register every meal, exercise/walk, and stool photo when possible; weak pains may be sporadic. | Preserves useful denominators for trend analysis without pretending pain capture is complete. |
A slip is data. Log it and continue; do not restart the clock unless the month becomes too noisy to interpret.
## Tracker logging
Use the Tracker app as the experiment log, not as a nutrition calculator: `https://spinningowl.cloud/meal-tracker/`.
| What to log | When / how |
|---|---|
| Meals and caloric drinks | Every time, at intake or as soon as remembered. |
| Diet soda / carbonated sweet drinks | For now: avoid. If there is a slip/rechallenge later, log product, volume, time, carbonation level if relevant, and pain/bloating/stool response. |
| Water | Do not log plain water; analysis uses gaps between logged non-water events. |
| Coffee / tea | Final week: planned no coffee, but actual Tracker data show a reduced-coffee phase with coffee exceptions; log every coffee/tea by type and rough size (`coffee`, `green tea`, `oolong tea`, `rooibos tea`, etc.). Label the 2026-05-03 to 2026-05-06 period as a partial/interrupted coffee-free attempt. |
| Alcohol/smoking slips | Log as ordinary events: `beer`, `cigarette`. |
| Bloating/pain observations | Bloating at least daily and ideally at symptom peaks. Pain means localized pain, not general bloating pressure; weak pains may be sporadic, while stronger/new/persistent/unusual pains should be logged when possible. |
| Maximum-width abdomen circumference | Morning baseline when practical; again at symptom peak or about 2 hours after a main meal when useful. |
| Stool photo | Intended for every bowel movement when possible, before flushing; if missed, do not backfill from memory. |
| Exercise/walks | Register every exercise/walk when possible, even if brief; intensity and notes can stay rough. |
| Supplements/medications | Log once when timing or dose changes. |
The app already handles timestamps, offline queueing, photo upload, experiment counter, and export. Those implementation details belong to the app, not this clinical protocol.
## Apple Watch setup for cleaner data
The useful signal is repeatable overnight and walking data, not more metrics. Assume default settings are fine unless data are missing.
1. Sleep/Vitals: no fixed sleep schedule needed. When lying down, turn on Sleep Focus manually from iPhone Control Center -> Focus -> Sleep, or Apple Watch side button -> Control Center -> Focus -> Sleep. Turn it off on waking. Vitals needs about 7 worn nights to establish a range.
2. Track sleep only if data are missing: Apple Watch app -> My Watch -> Sleep -> Track Sleep with Apple Watch. Do not check this routinely; it is usually already on if sleep tracking works.
3. Runkeeper is fine for walks/exercise if Health Sync is on. One-time verify after the next walk: Health app -> Search -> Workouts -> Show All Data -> latest workout should list Runkeeper and show duration/distance; if it has route/HR/active energy, even better. Do not double-track the same walk in Apple Workout unless testing.
4. Walk accuracy one-time check only if pace/distance look wrong: iPhone Settings -> Privacy & Security -> Location Services -> System Services -> Motion Calibration & Distance. If on, stop checking. Apple’s formal calibration method is one 20-minute Apple Workout -> Outdoor Walk on a flat/open route.
5. Benchmark walks: for deliberate walks, use Runkeeper consistently and reuse the same route when practical; compare pace vs average HR over weeks.
Do not spend time auditing default privacy/heart-rate settings unless resting HR, walking HR, workout HR, or sleep data are missing. Apple does not offer a useful setting to increase passive measurement frequency. The practical frequency boost is workout tracking: Apple measures HR continuously during Workout app sessions; Runkeeper is acceptable if its workout in Health includes HR. Avoid Low Power Mode during sleep/workouts because it disables background HR/blood-oxygen measurements and heart notifications.
Manual sensors: take one calm baseline ECG if the app is already set up, then use ECG only for palpitations, skipped/rapid heartbeat, chest discomfort, dizziness, unusual shortness of breath, or an irregular-rhythm notification. ECG is a 30-second single-lead rhythm snapshot and does not detect heart attack, stroke, clots, cholesterol, or blood pressure. Optional blood-oxygen/current-HR checks are symptom-timed only. Skip sleep-stage micromanagement and daily HRV rituals unless effortless.
Log only context Apple/Runkeeper cannot know: tea type/size and any coffee slip, smoking/alcohol slips, illness, gut symptoms, and unusual stress/sleep.
## Abdomen circumference
Use the tape as an objective distension add-on. The 0-10 bloating score captures pressure/discomfort; maximum-width abdomen circumference captures physical expansion.
Protocol:
1. Stand upright and relaxed.
2. Let the abdomen relax normally; do not suck in or push out.
3. Wrap the tape horizontally around the **widest belly point** at that moment.
4. Measure after a normal relaxed exhale.
5. Use snug contact without compression.
6. Record to nearest 0.5 cm if possible, otherwise nearest 1 cm.
7. Use short notes: `max-width abdomen 92.5 cm, standing relaxed`.
Best comparison points: morning baseline after toilet and before food/tea; symptom peak; about 2 hours after a main meal. Interpret the delta more than the absolute number. A +5 cm symptom-peak rise supports physical distension; a high bloating score without much circumference change points more toward visceral sensitivity/pressure.
This stays in the symptom/motility branch. It does not replace the bleeding dashboard: visible blood, FOB/stool RBC, ferritin/TSAT/Hb, and red-flag symptoms.
## Fasting branch — deferred until after final labs
Classification: **WATCH / optional later self-test, not a core intervention.** Fasting was reviewed as a queued 24h/48h/72h idea for the active 30-day window. It was correctly not added before day-30/31 labs. The practical conclusion remains conservative: protect the clean signals from smoking abstinence, alcohol abstinence, meal timing, stool/iron follow-up, Apple Watch/BP context, and the weaker final-week coffee-reduction signal. A later 24-hour fast can answer a gut-motility question, but it should not become a major health-optimization project during this loaded protocol.
| Duration | Current role | What it could teach | Why not make it central now |
|---|---|---|---|
| 24 hours | Defer until after final labs | Whether bloating/distension/walking discomfort drops with complete food absence; whether refeeding triggers a reproducible symptom flare; hunger/craving/sleep/HR response | Would have mixed with final-lab interpretation and coffee-reduction noise. Lowest-disruption fasting option later, but not needed for the main endpoints. |
| 48 hours | Defer | Stronger ketosis/fat-oxidation and gut-rest signal | More sleep, mood, fatigue, exercise, bowel-output, and refeed noise; can stress nicotine-abstinence stability. Do only later if a 24h fast gives a clearly useful signal. |
| 72 hours | Skip during this experiment | Deep metabolic-switch experiment, not a decision-grade clinical test | Too much confounding and low personal yield: current insulin sensitivity is already good, and longer fasts can acutely alter lipids/ApoB, uric acid, inflammatory markers, platelet/coagulation signals, lean mass, and refeeding response. |
What fasting can plausibly help interpret: meal-driven bloating, MMC/no-snacking response, walking-related distension when fasted, refeed sensitivity, resting HR/HRV/sleep, and behavioral stability under food absence.
What it should **not** be used to interpret: occult-blood clearance, iron-loss source, diverticular rebleeding prevention, cancer screening, Lp(a) risk, aspirin/antithrombotic safety, or whether WBC/platelets are reactive versus clonal.
If a 24h fast is done, log start/end time, water/electrolytes/salt use, hunger/cravings, bloating and maximum-width abdomen circumference at baseline/pre-refeed/2h post-refeed, fasted walk response, stool/photo if any, sleep, resting HR/HRV, optional BP, and the first refeed meal. Refeed with a moderate familiar vegetarian meal; avoid a huge spicy/oily/raw-fiber challenge. Stop early for dizziness/fainting, chest pain, palpitations, unusual shortness of breath, severe weakness/confusion, severe abdominal pain, visible red/maroon/black stool, vomiting, or inability to hydrate.
Evidence anchors: prolonged fasting review (PMID: 37377031); intermittent-fasting RCT meta-analysis (PMID: 40533200); 48h cognition/mood studies (PMIDs: 28025637, 32504694); 72h metabolic studies (PMIDs: 30183740, 12388154); supervised fasting safety cohorts (PMIDs: 29458369, 30601864); prolonged fasting inflammation/platelet activation signal (PMID: 40268190).
## Stool photos
Goal: make images comparable enough for later stool consistency/color review. Consistency matters more than perfect images.
Historical comparator: two user-supplied stool photos timestamped **2025-08-20** have been archived privately under the local archive identifier `stool-photos-2025-08-20`. They may represent the actual late-August 2025 visible bleeding incident or an immediately adjacent stool. Do not publish the images; use the private originals and manifest only as a later comparator for visible blood/color patterns when reviewing 30-day Tracker stool photos or stool-blood research.
Historical exposure context: a separate private archive, `topical-mupirocin-prebleed-2025-08`, records the user-supplied photo of 康立邦 莫匹罗星软膏 (mupirocin ointment), reported as bought OTC and applied to penile/genital skin before the August 2025 bleeding incident. The front panel shows 5 g and external-use OTC markers; matching listings show 2% (20 mg/g). Use this later as exposure context when comparing the historical bleed with current stool-photo/stool-blood data; do not treat it as causal until researched.
| Factor | Guideline |
|---|---|
| Conditions | Keep conditions as similar as possible: same bathroom, same lights, same phone/camera mode when practical. |
| Flash | Always use flash. |
| Angle/size | Take the photo from straight above, focus on what is inside the toilet bowl, and maximize stool size in the frame while keeping it recognizable. |
| Focus/color | Retake blurry photos; no filters, night-mode color effects, or editing. |
| Notes | Add a note only for visible red/black area, unusual color, urgency, diarrhea, constipation, pain, or uncertainty. |
Practical default: same conditions, straight above, flash on, focused on the toilet bowl contents, stool as large as practical in the frame.
## Final-week sub-experiment — coffee-reduction tea phase
The deliberate coffee-removal plan started on **2026-05-20**, but the actual Tracker record shows a **coffee-reduction / tea-substitution phase with exceptions**, not a clean coffee-free trial. Logged final-week coffee exceptions were **2026-05-21** (“Coffee”), **2026-05-23** (“Coffee”), **2026-05-24** (“Tuna bun and coffee”), **2026-05-25** (“Coffee”), and **2026-05-26** (“Daily coffee before working”). The original **2026-05-03 14:00 -> 2026-05-10 14:00 Cambodia time** window was paused/postponed as of **2026-05-06** because nicotine/smoking abstinence was the higher-priority experiment load. Treat May 3-6 as logged context and May 20-26 as reduced coffee with exceptions, not as a clean no-coffee comparator.
| Rule | Protocol |
|---|---|
| Main rule | Planned rule was **no coffee at all**, but actual adherence became **reduced coffee with logged exceptions**. Analyze actual coffee days separately from tea-only days. |
| Caffeine rule | **Caffeine is allowed from tea**, but keep it moderate and fairly stable. The intended test was coffee removal rather than total caffeine withdrawal; actual interpretation is weaker because coffee exceptions occurred. |
| Default teas | Green tea and oolong tea, unsweetened/plain, are the preferred default. They keep some caffeine while removing coffee-specific compounds and preparation habits. |
| Caffeine-free options | Rooibos, ginger, chamomile, lemongrass, chrysanthemum, and mild mint teas are allowed. Use these especially late day. |
| Secondary options | White tea or black tea are allowed if wanted, but black tea is more caffeine/polyphenol-heavy, so keep it secondary rather than the main replacement. |
| Avoid | Yerba mate, guayusa, yaupon, energy drinks, cola-as-caffeine replacement, Coke Zero/diet colas, bottled sweet tea, bubble/milk tea, and green-tea extract supplements. They add avoidable stimulant, carbonation, sweetener, sugar, calorie, or supplement confounding. |
| Iron timing | Tea polyphenols, not just caffeine, can inhibit non-heme iron absorption. Keep tea away from iron-focused meals when practical: ideally about 1-2 hours after meals, and use vitamin-C pairing with vegetarian iron meals. |
| Logging | Log every tea with type and rough size: `green tea`, `oolong tea`, `ginger tea`, etc. If headache/fatigue/irritability appears in the first 2-3 days, mark it as possible caffeine reduction/withdrawal rather than assuming gut worsening. |
Final-phase interpretation default: **not a clean no-coffee trial**. It can still inform whether reducing coffee and substituting tea was behaviorally feasible and whether clearly tea-only days differed from coffee-exception days. Recommended default remains useful if the habit continues: **green tea or oolong earlier in the day; rooibos/ginger/chamomile/lemongrass/chrysanthemum later**, with tea kept away from iron-focused meals when practical. Keep meals, alcohol/smoking abstinence, exercise, and other routines stable when evaluating any future coffee-removal signal.
What it can answer now: whether reduced coffee plus more tea coincided with any obvious change, and whether tea-only days differ from coffee-exception days. What it cannot answer cleanly: whether strict coffee removal improves bloating, stool/urgency changes, sleep/HR signals, or iron-absorption noise. A future clean trial would need no coffee at all and no cola/diet-soda replacement, because carbonation, phosphoric acid/cola flavoring, caffeine, and non-caloric sweeteners are separate GI variables.
Evidence basis kept practical: brewed coffee is roughly 96 mg caffeine per 8 oz, green tea about 29 mg, and black tea about 48 mg, with wide preparation variability (Mayo Clinic, 2025). Caffeine withdrawal can begin 12-24 hours after stopping, peak around 20-51 hours, and last 2-9 days, sometimes from habitual intakes around 100 mg/day ([PMID: 15448977](https://pubmed.ncbi.nlm.nih.gov/15448977/)); therefore a tea-caffeine allowance keeps withdrawal from drowning the coffee-specific signal. Iron timing still matters because polyphenol-containing drinks, including black tea, coffee, peppermint, and several herbal teas, can strongly inhibit non-heme iron absorption with a meal ([PMID: 10999016](https://pubmed.ncbi.nlm.nih.gov/10999016/)). Coffee also has GI effects beyond caffeine, including gastric-acid/gastrin, bile/pancreatic secretion, microbiome, and colonic-motility effects, with individual symptom response still variable (Nutrients 2022 coffee-GI review, PMCID: PMC8778943).
## End tests
At day 30/31 (**2026-05-26/27 Cambodia**), repeat the paired set if possible.
Blood:
- CBC/Hg
- Reticulocyte
- Ferritin
- Iron
- TIBC
- Fibrinogen
- CRP hs or CRP
- ESR
- Fasting glucose + fasting insulin if taken at day 0
- Homocysteine + folate only if taken at day 0 and the month included meaningful diet/supplement/alcohol changes
Stool:
- **Essential:** FOB + Stool Direct Exam = **$9.50**
- **Better full context:** FOB + Stool Direct Exam + Calprotectin = **$74.50** if inflammatory symptoms return or the GI picture is unclear
- **Optional:** H. pylori stool antigen (+$15) only if upper-GI suspicion increases
Optional blood add-ons only if the result would change interpretation: zinc ($16.25) and copper ($15.00, especially if adding zinc). **CEA is not a routine stool-blood add-on**; use it only if a clinician specifically wants tumor-marker follow-up in the context of prior CEA history, symptoms, imaging, or endoscopy planning.
If visible blood, melena, worsening pain, dizziness, unusual fatigue, or a major bowel-pattern change appears, do not wait for day 30. Repeat the stool/blood set sooner and treat it as a GI-source escalation question.
## Interpretation
| Pattern after 30 days | Interpretation |
|---|---|
| Iron/ferritin improve and stool blood clears | This is the current end-experiment pattern: cleaner intake/absorption plus no obvious ongoing occult-loss signal on the repeat stool sample. |
| Iron/ferritin improve but stool blood is not repeated or still pending | Blood-side recovery improves the exposure/iron story, but does not answer the bleeding-source question. |
| Iron/ferritin improve but stool blood persists | Diet/absorption may help, but bleeding-source question remains unresolved. |
| Iron/ferritin fall and stool blood persists | Ongoing loss becomes the dominant concern. |
| Iron/ferritin fall but stool blood clears | Intake/absorption, small-bowel, or non-GI explanations remain possible. |
| Bloating improves but iron does not | Symptom branch and iron branch are probably not the same problem. |
| Bloating does not improve despite clean spacing | SIBO/MMC/SUDD branch stays active; meal-spacing hypothesis weakens. |
| Stool photos improve while FOB remains positive | Visible consistency improves, but occult-bleeding logic remains active. |
| Stool photos worsen with stable labs | More likely motility/diet/microbiome branch unless red flags appear. |
| WBC/platelets/fibrinogen normalize | Reactive exposure/inflammation explanation strengthens. |
| WBC/platelets/fibrinogen stay high | Reactive-only explanation weakens; revisit inflammatory/hematology logic. |
| Apple Health sleep/HRV/resting HR improves with symptoms | Systemic recovery signal strengthens. |
| Apple Health improves but GI symptoms do not | Gut-specific branch remains active despite general recovery. |
## Blind spots
These remain separate tracks even if the month goes well:
- persistent positive occult blood still needs GI-source logic
- poor iron response may need celiac/malabsorption reassessment
- persistent bloating may still need SIBO/breath-testing workup
- persistent thrombocytosis may still need JAK2/CALR/MPL-style escalation logic
- Lp(a), BP, and cardiac imaging are separate risk-management tracks