Answer:
Right lateral radiographic image.
Step-by-step explanation:
Radiographic imaging is useful to determine the particular position of the patients. Different diseases can be easily diagnosed by the radiographic imaging.
The most helpful procedure of confirming the disease in 3 year old patient is right lateral radiographic image. This imaging is generally used to reveal the the displaced pylorus filled with gas and the ventral fundus. Both are separated by soft band of the tissue. The gastric dilation and volvulud can be examined by this radiographic image.
Thus, the answer is right lateral radiographic image.