Final answer:
The range of particle size for most particles in 99mTc-MAA is between 10 to 100 nanometers, which is within the heterogeneous particle size range of 1-1000 nanometers.
Step-by-step explanation:
The range of particle size for the majority of particles in 99mTc-MAA (technetium-99m macroaggregated albumin) is typically between 10 to 100 nanometers. Macoaggregated means that the particles are a clump of smaller molecules, and these aggregates fall under the category of heterogeneous particle sizes, which range from 1-1000 nanometers. In medical applications, technetium-99m is frequently used in the form of 99mTc-MAA for imaging and diagnostic procedures because its decay produces a single, easily identified gamma-ray, which is useful for the safe delivery of a diagnostic dose of radiation to the patient.