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DHA Radiographer - Reviews


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See why our users from 154 countries love us for their exam prep! Including 160 reviews for the DHA Radiographer exam.

Exam Edge is an industry leader in online test prep. We work with institutional partners to offer a wide array of practice tests that will help you prepare for your big exam. No matter how niche your field of interest might be, we're here to help you prepare for test day.

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DHA Radiographer - Test Reviews Sample Questions

Which of the following is not a form Fentanyl is available in?

Correct Answer:
skin lotion.


the question asks to identify which form of fentanyl is not available among the listed options. the options provided are: film that dissolves in the mouth, skin lotion, skin patch, and nasal spray. to answer this, we need to understand the various formulations in which fentanyl is commercially available.

fentanyl is a potent synthetic opioid used primarily for pain management, particularly in severe cases such as cancer-related pain or after surgeries. it acts on opioid receptors in the brain and spinal cord, leading to a decrease in the sensation of pain and the emotional response associated with it. due to its high potency and potential for abuse, fentanyl is classified as a controlled substance and is only available through a doctor's prescription.

the common forms of fentanyl include: 1. **pills**: typically used for breakthrough pain and are often available in formulations that are swallowed or dissolved in the mouth. 2. **skin patches**: these are transdermal patches that deliver fentanyl slowly through the skin, providing continuous pain relief. they are one of the most common methods for administering fentanyl, especially for chronic pain management. 3. **nasal sprays**: used for rapid relief of breakthrough pain by providing a quick onset of action. 4. **intravenous (iv) administration**: generally used in hospital settings for immediate pain relief and during anesthetic procedures. 5. **injections (shots)**: used for more controlled dosing when immediate but short-term pain relief is needed. 6. **films that dissolve in the mouth**: these are used for their fast-acting properties and ease of use, especially in situations where swallowing pills is difficult.

based on the information about common fentanyl formulations, it is evident that skin lotion is not a recognized or approved form for fentanyl delivery. fentanyl requires careful dosing and administration through specific delivery systems that ensure controlled release and absorption, which are not feasible with a lotion format. thus, "skin lotion" is the correct answer to the question, as it is not a legitimate or available form of fentanyl.

For MR signal intensities, a cyst using T1WI will have the image turn out as:

Correct Answer:
dark.


to understand how different substances or tissues appear on various magnetic resonance imaging (mri) sequences, it's important to know the basics of how mri works. mri uses a powerful magnetic field and radio waves to generate images of the organs and structures within the body. the appearance of these structures on mri depends on their properties, particularly their proton density and relaxation times (t1 and t2).

for the question regarding the mr signal intensity of a cyst on t1-weighted imaging (t1wi), the answer is that it will typically appear dark. this is because cysts are filled with fluid that contains few mobile hydrogen protons available to induce a strong signal on t1wi. the low proton density and longer t1 relaxation time of the fluid result in lower signal intensity, hence a darker appearance on t1wi.

in contrast, on t2-weighted imaging (t2wi), cysts will generally appear bright. this is because the fluid in the cyst has a longer t2 relaxation time, which means it holds onto its magnetization longer than the surrounding tissues. this results in a higher signal intensity, making the cyst appear bright on t2wi.

proton density (pd) and fluid-attenuated inversion recovery (flair) sequences also provide different contrasts based on the water content and flow dynamics within tissues. for a cyst, the pd imaging typically shows a bright signal due to the high fluid content, whereas on flair, which suppresses the signal from free fluid, the cyst may appear dark.

understanding these variations in signal intensities across different mri sequences is crucial for accurately diagnosing and characterizing different types of tissues, cysts, masses, and other pathological conditions. for instance, solid masses might appear differently compared to cystic or hemorrhagic areas, and knowing these differences enhances diagnostic accuracy in clinical practice.