Article Figures & Data
Figures
- FIGURE 1.
Exposure rate surveys are conducted in the hallway outside the isolation room to ensure regulatory compliance.
- FIGURE 2.
Wipe tests are conducted daily in the hallway and at the nurses’ station to ensure contamination control.
Tables
Disposable surgical gowns 2 boxes of disposable shoe covers Boxes of disposable latex gloves (all sizes) Disposable surgical masks 2–3 boxes of small filter papers (for wipe tests) Scissors Tape (masking tape and radiation warning tape) Large garbage bags (for collection of contaminated items) G-M detector Permanent marking pens Decontamination cleansing solution (a dilute solution of liquid dishwashing detergent and water) - TABLE 2
Determination of Activity Remaining in a Patient’s Body Based on Exposure Rate Measurements
Sample Calculation: An 131I therapy patient is administered a therapy dose of 7400 MBq (200 mCi). An initial exposure rate reading is made a distance from the patient soon after dosing and is determined to be 50 μGy/h (5 mR/h). The dosing vial is assayed after the dose is administered and is found to contain 29.6 MBq (800 μCi) of residual activity. Approximately 24 h later, a second exposure rate reading of 22 μGy/h (2.2 mR/h) is obtained at the same distance from the patient as on the previous day. Based on the dose rate measurements provided, what activity remains in the patient’s body 24 h after dose administration? Solution: 
Since exposure rate is directly proportional to the activity, the following proportion can be established:
