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MOH Radiographer - Blogs Sample Questions

According to the EPA, an individual with radiation exposure of 2,000 rem would begin to experience which of the following?

Correct Answer:
loss of consciousness within minutes.


according to the environmental protection agency (epa), radiation exposure levels and their corresponding health effects are meticulously quantified to ensure public safety and awareness. the epa has established a variety of thresholds where different symptoms and health risks become prevalent as the dosage of radiation exposure increases.

for instance, lower exposure levels ranging from 5-10 rem can lead to changes in blood chemistry, which might not immediately manifest noticeable symptoms but indicate alterations at a cellular level. as the exposure increases to 50 rem, symptoms become more apparent with nausea, and at 55 rem, fatigue sets in. the severity of symptoms escalates with the increase in radiation dosage. at 70 rem, individuals might experience vomiting, followed by hair loss at 75 rem, and diarrhea at 90 rem. a further increase to 100 rem can lead to severe conditions such as hemorrhage.

once the exposure reaches about 400 rem, the risk of mortality increases, with potential death being a significant threat. a dosage of 1,000 rem intensifies the severity of internal damage, including internal bleeding, death likely within 1 to 2 weeks, and destruction of the intestinal lining, indicating profound impairment to critical bodily functions.

at an exposure level of 2,000 rem, the effects are catastrophic. this high level of radiation primarily affects the central nervous system, causing immediate and severe damage. one of the most immediate symptoms at this stage is the loss of consciousness occurring within minutes. this rapid decline in neurological function illustrates the acute and lethal nature of such high radiation exposure. following this, death can occur within hours to days, depending on various factors including the health and individual conditions of the exposed person.

therefore, when considering the radiation exposure of 2,000 rem, the most immediate and severe effect according to the epa is the loss of consciousness within minutes, followed by imminent death within a short timeframe. this highlights the extreme danger posed by such high levels of radiation and underscores the importance of stringent safety measures and regulations to prevent such exposures.

Another term for filtration is called:

Correct Answer:
hardening of the beam


another term for filtration in the context of x-ray production is "hardening of the beam." this phrase captures the essence of what occurs during the filtration process in radiography or medical imaging. when x-rays are initially produced, they consist of a spectrum of photon energies. some of these photons are of lower energy, often referred to as "soft" x-rays, while others are higher energy, or "hard" x-rays.

during the filtration process, a material, typically made of metal such as aluminum, is placed in the path of the x-ray beam as it exits the x-ray tube but before it reaches the patient or object being imaged. the primary role of this filter is to absorb or block the lower-energy photons. these soft photons are less likely to penetrate the body and more likely to contribute to the dose without improving the quality of the image. by removing them, the filter effectively "hardens" the x-ray beam.

this hardening of the beam increases the average energy of the photons that make up the beam. as a result, the beam has enhanced penetrating power and can produce clearer, more detailed images. additionally, by eliminating the lower energy photons, the overall patient exposure to radiation can be reduced, enhancing the safety and effectiveness of the diagnostic process.

therefore, when the term "hardening of the beam" is used, it specifically refers to the increase in the average energy of the photons in the x-ray beam due to the selective absorption of lower-energy photons by the filtration material. this is a crucial step in optimizing the quality and safety of x-ray imaging.

Additional Blogs for MOH Saudi Arabia - Ministry of Health (Saudi Arabia) dfgdfgdfg

In your journey to get MOH Radiographer certified it is important for you to have all information related to your exam. So we have pulled together a list of additional blogs that may be of interest to you because that are all related to the Ministry of Health (Saudi Arabia).

Exam Edge Blogs for MOH Saudi Arabia - Ministry of Health (Saudi Arabia)