Which equipment is needed to verify the size and number of MAA particles?

The hemocytometer and light microscope are essential tools for verifying the size and number of MAA (Microspheres for Arterial embolization) particles. A hemocytometer is specifically designed for counting the concentration of cells or particles in a sample. By loading a sample onto the hemocytometer and observing it under a light microscope, technicians can accurately count the particles and assess their size. This process is critical in various applications within nuclear medicine, particularly in ensuring proper dosing and safety when using MAA particles for procedures like lung perfusion scans or treatment of liver tumors.

The other listed equipment is not applicable for this purpose. Ultrasound and CT scanners are imaging modalities that provide structural information and are not used directly to measure particle size or count. A blood glucose monitor is designed to measure glucose levels in blood, and an electrocardiogram with a stethoscope is used to evaluate heart function and sounds, neither of which relate to particle measurement. Thus, the hemocytometer and light microscope are the correct tools for this specific verification in nuclear medicine.