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DHA MRI Technologists (DHA-MRI) Practice Tests & Test Prep - Review


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DHA Magnetic Resonance Imaging Technologists - Reviews


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See why our users from 154 countries love us for their exam prep! Including 145 reviews for the DHA MRI Technologists 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 Magnetic Resonance Imaging Technologists - Test Reviews Sample Questions

A technique which reduces respiratory motion artifacts by gating the sequences to the movement of the chest wall is known as which of the following?

Correct Answer:
respiratory gating.


the correct answer to the question regarding a technique that reduces respiratory motion artifacts by gating sequences to the movement of the chest wall is known as "respiratory gating." this method is pivotal in improving image clarity and accuracy in imaging modalities such as mri (magnetic resonance imaging) and ct (computed tomography) scans, where patient motion can degrade the quality of the results.

respiratory gating works by synchronizing the acquisition of imaging data with the patient's breathing cycle. typically, during a respiratory cycle, the position of organs and tissues within the thoracic cavity changes, which can lead to blurring or artifacts in images if not accounted for. by using sensors or other monitoring devices to track the movement of the chest wall, the imaging system can be controlled to collect data only at certain points in the cycle — typically when motion is minimal.

this method is also referred to as respiratory triggering. in respiratory triggering, the imaging device is triggered to acquire data at specific phases of the respiratory cycle, usually during end-expiration where the body is relatively still compared to other phases of breathing. this synchronization helps in significantly reducing motion artifacts, thereby enhancing the quality and diagnostic value of the images.

respiratory gating is particularly useful in thoracic imaging, where clear and precise images of the heart, lungs, and surrounding structures are crucial for accurate diagnosis and treatment planning. it is also increasingly being used in radiation therapy for tumors in the lung and upper abdomen, to ensure that radiation is precisely targeted while minimizing exposure to surrounding healthy tissues.

despite its benefits, the implementation of respiratory gating requires sophisticated equipment and can increase the complexity and duration of imaging procedures. however, the improvement in image quality and the potential for more accurate diagnosis and treatment planning often outweigh these challenges.

What is necessary for a patient who is transported from isolation that is not typically necessary for other patients?

Correct Answer:
mask.


when transporting a patient from isolation, certain precautions must be taken that are not typically necessary for other patients. one of the most crucial items is the use of a mask. masks are essential in preventing the spread of infections through respiratory droplets. these droplets can be expelled when a person coughs, sneezes, talks, or even breathes, and they can carry infectious agents such as viruses or bacteria. therefore, when a patient is in isolation due to a contagious disease, both the patient and those transporting the patient should wear masks to contain the spread of infection.

it's important to note that while gloves and gowns are also used as protective gear in medical settings, their use is not unique to the transport of patients from isolation. gloves are generally worn during any patient interaction that involves potential contact with bodily fluids, to protect healthcare workers from exposure to various pathogens. similarly, gowns are worn to protect healthcare workers' clothing and prevent the transmission of infectious agents. these items are standard in many medical procedures and interactions, not just in cases involving isolation.

hand washing is another critical practice in any medical care scenario, including the transport of isolated patients. regular and thorough hand washing helps prevent the spread of infection and is a fundamental hygiene practice in healthcare settings. however, like gloves and gowns, hand washing is a universal precaution and not specific only to the transport of patients from isolation.

in summary, while masks, gloves, gowns, and hand washing are all important in the context of preventing the spread of infection, the use of a mask is particularly emphasized when transporting a patient from isolation. this is because masks directly address the primary route of transmission—respiratory droplets—which is a concern when dealing with infectious diseases that necessitate isolation.