What is the formula for calculating the SUV body weight?

The formula for calculating the Standardized Uptake Value (SUV) based on body weight is represented correctly in the choice. SUV is a commonly used metric in PET imaging to assess the uptake of radiotracers in tissues, normalized to the patient's body weight. The calculation helps in comparing the concentration of the radiotracer in a region of interest (ROI) to the total amount of tracer injected, adjusted for body weight, providing a standardized measure that accounts for body size.

To break it down: the ROI tracer concentration measures the radioactivity concentration in a specific tissue area, while the tracer dose reflects the total amount of the radiotracer administered to the patient, divided by their weight to give a value in kg. This normalization allows for accurate assessments of metabolic activity, particularly useful in oncological evaluations.

The other options do not correctly represent the standard formula for SUV concerning body weight. The essential framework is to measure the concentration in a defined volume (the ROI) against the body weight-adjusted total injected dose, ensuring that variations in body size don't skew the interpretation of the PET scan results.