Question

Given the following date set, calculate the thyroid uptake?

1) Standard counts = 9456
2) Background counts = 215
3) Thyroid counts = 4519
4) Thigh counts = 284

Answer 1

The thyroid uptake is calculated by subtracting background counts from thyroid and standard counts, dividing the net thyroid counts by the net standard counts, and then multiplying by 100 to obtain the percentage. The calculation results in a thyroid uptake of approximately 46.60%.

Step-by-step explanation:

The student is asked to calculate the thyroid uptake using a given data set that includes standard counts, background counts, thyroid counts, and thigh counts. To perform this calculation, background counts need to be subtracted from both the thyroid and thigh counts to obtain net counts. Then, the net thyroid count is divided by the net standard count and multiplied by 100 to get the thyroid uptake percentage.

Here's the step-by-step calculation:

1. Subtract the background counts from both the thyroid and standard counts to get the net counts.
   
   • Net Thyroid Counts = Thyroid Counts - Background Counts = 4519 - 215 = 4304
   • Net Standard Counts = Standard Counts - Background Counts = 9456 - 215 = 9241
2. Divide the net thyroid counts by the net standard counts.
3. Multiply the result by 100 to obtain the thyroid uptake percentage.

Using the provided values:

Thyroid Uptake (%) = (Net Thyroid Counts / Net Standard Counts) × 100 = (4304 / 9241) × 100 ≈ 46.60%

The thyroid uptake is approximately 46.60%.