Final answer:
Laser alignment should be checked monthly and before each use to ensure accuracy and consistency in various applications.
Step-by-step explanation:
Checking the orientation of lasers with respect to imaging planes should take place not only monthly but also before each use. This practice is crucial for maintaining accuracy and consistency in applications such as medical imaging, scientific research, and industrial processes. Regular checks ensure that the laser is aligned correctly and functioning at optimal performance, thus preventing errors and maintaining the integrity of the data or work being performed.