Thyroid scan - Preparation Requirements
TOTAL DURATION OF STUDY:
40 minutes
SCANNING TIME:
Approximately 40 minutes per image.
PREGNANCY:
Contraindicated
BREAST FEEDING:
Stopped 24 hours
MEDICATION:
See table below. Kindly have your clinician speak directly with Nuclear Physician for full preparation.
PREVIOUS STUDIES:
Required.
BIOCHEMISTRY:
Recent TFT’s required.
DIET:
Low iodine diet. Bring a snack for duration of study.
HYDRATION:
Patient is encouraged to drink water prior and during study
| Adrenocorticosteroids 1 week | Bromides 1 week |
| Butazolidine 1 week | Mercurials 1 week |
| Methimazole (Tapazole) 1 week | Nitrates 1 week |
| Perchlorate 1 week | Propylthiouracil 1 week |
| Salicylates (large doses) 1 week | Sulfonamides 1 week |
| Thiocyanate 1 week | Tri-iodothyronine (Cytomel) 2 to 3 weeks |
| Thyroid extract (Synthroid, Proloid) 4 weeks | Iodine solution (Lugol’s or SSKI**) 4 weeks |
| Iodine-containing antiseptics 4weeks | Kelp 4 weeks |
| Some cough medicines and vitamin preparations 4 weeks | Intravenous contrast agents 1 to 2 months |
| Oil-based iodinated contrast agents 3 to 6 months | Amiodarone 3 to 6 months |
**saturated solution of potassium iodide.