Positron emission tomography scan (PET scan) Positron emission tomography (PET) is a nuclear imaging technique that creates detailed, computerized pictures of organs and tissues inside the body. A PET scan reveals how the body is functioning and uncovers areas of abnormal metabolic activity. During a PET scan, the patient is first injected with a glucose (sugar) solution that contains a very small amount of radioactive material. The substance is absorbed by the particular organs or tissues being examined.
Kneisler used a hailstone that measured 5.581 inches in diameter and weighed 1.68 lbs (a hailstone that was previously the largest measured in the U.S.) to calculate numbers necessary to estimate the size of the great hailstones in Revelation 16:21. Kneisler also assumed that the great hailstones would weigh 75 lbs in his analysis.
Other stones have frequently been reported to be the size of a baseball or even a small grapefruit. How would you like to be hit by one of these? The largest hailstone reported in the United States fell in a storm in Potter, Nebraska, in 1928. It was round and hard and weighed a pound and a half with a circumference of seventeen inches, just about the size of a softball. However, the largest hailstone in the world that has ever been found was in India after a hailstorm on March 17, 1939. This stone weighed seven and one-half pounds. Scientists wonder if perhaps this stone was not really several stones that had joined to make one.