What is the percent perfusion to the right lung if the right lung counts are 175,362 and the left lung counts are 325,672?

To find the percent perfusion to the right lung based on the given counts, you would use the total lung counts to determine the distribution of perfusion to each lung. The formula for percent perfusion to the right lung is as follows:

Percent perfusion to the right lung = (Right lung counts / Total lung counts) x 100

First, calculate the total lung counts by adding the counts from both lungs:

Total lung counts = Right lung counts + Left lung counts

Total lung counts = 175,362 + 325,672 = 501,034

Now, apply these values to the formula:

Percent perfusion to the right lung = (175,362 / 501,034) x 100

This calculation yields:

Percent perfusion to the right lung = 0.349 or 34.9%

When rounded to the nearest whole number, this corresponds to approximately 35%. Therefore, this methodology demonstrates how to calculate the relative perfusion based on count data, leading to an accurate understanding of lung function in a nuclear medicine context. The calculation confirms that the right lung has a perfusion percentage that closely aligns with the option indicating 35%.