Final answer:
Close collimation is effective in minimizing scatter radiation in radiography. Other methods to limit radiation include employing isotopes with short half-lives and techniques like CT scans and PET scans which use different forms of radiation for medical imaging and treatment purposes.
Step-by-step explanation:
The question relates to the reduction of scattered radiation in radiography of a large abdomen. The most effective way to minimize the amount of scattered radiation reaching the image receptor (IR) is through the use of close collimation. Collimation confines the radiation beam to the area of interest, which reduces the volume of irradiated tissue and thus minimizes scatter. This improves image quality by enhancing contrast and reducing noise from scattered photons. Other methods to reduce radiation dose in medical imaging include using isotopes with short half-lives, as they decrease the time the patient is exposed to radiation. Technologies such as CT scans use X-ray radiation to produce cross-sectional images, while PET scans use radioactive substances to assist in treatments like chemotherapy.