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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.

   Excellent -- Based on 145 reviews

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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.