Final answer:
The statement, 'at least 30 million counts should be obtained when assessing the uniformity of a planar imaging system,' is false. The count required for assessing the uniformity depends on the specific requirements and standards set for the system.
Step-by-step explanation:
The statement, 'at least 30 million counts should be obtained when assessing the uniformity of a planar imaging system,' is false. The count required for assessing the uniformity of a planar imaging system is not specified in terms of a specific number like 30 million. Instead, it depends on the specific requirements and standards set for the system. To evaluate uniformity, one would typically rely on factors such as count statistics, spatial distribution, and error propagation.