<prompt> On taking X-ray, Grid is placed:Behind the film and in front of the patientBehind the patient and in front of the filmBehind the film and lateral to the patientBehind the patient and lateral to the film  <response>: Grids are placed between the patient and the x-ray film to reduce the scattered radiation from forming the image and thus improve image contrast. They are made of parallel strips of lead with an inter-space having aluminum or organic spacer and prevents scatter radiation from forming the image while allowing the straight beam to pass. 