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Related Concept Videos

Imaging Studies IV: Magnetic Resonance Imaging01:27

Imaging Studies IV: Magnetic Resonance Imaging

Introduction:Magnetic Resonance Imaging, or MRI, can include a specialized imaging technique of the urinary system known as Magnetic Resonance Urography (MRU). This radiation-free technique uses strong magnetic fields and radio waves to produce detailed images with the help of a computer. MRU is particularly effective for visualizing fluid-filled structures like the kidneys, ureters, and bladder.Applications of MRI in the Genitourinary SystemKidneys and Ureters: MRI detects tumors, cysts,...
Imaging Studies I: CT and MRI01:14

Imaging Studies I: CT and MRI

Introduction: MRI and CT scans are crucial advancements in medical imaging techniques, playing a vital role in diagnosing conditions related to the gastrointestinal (GI) system. Each scan serves distinct purposes, targets specific areas, and requires unique nursing duties.
Description of the Procedures
Computed Tomography (CT) scan:
Computed Tomography (CT) scans use X-ray technology to generate detailed images of bones, organs, and tissues. During the scan, the patient lies on a moving table...
Magnetic Resonance Imaging01:24

Magnetic Resonance Imaging

Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...
Imaging Studies II: Ultrasonography01:24

Imaging Studies II: Ultrasonography

IntroductionUltrasonography, or renal ultrasound, is a noninvasive medical imaging technique that uses high-frequency sound waves to visualize the kidneys, ureters, bladder, and surrounding tissues.Indications for Urinary System UltrasonographyUrinary system ultrasonography is indicated in various clinical scenarios, such as:Kidney Stones (Urolithiasis): To detect and monitor the size and presence of kidney or urinary tract stones.Hydronephrosis: To assess the dilation of the renal pelvis and...
Imaging Studies III: Computed Tomography01:27

Imaging Studies III: Computed Tomography

DefinitionComputed Tomography (CT) of the genitourinary (GU) tract is a non-invasive imaging modality that utilizes X-rays and computer processing to generate detailed cross-sectional images of the urinary system, encompassing the kidneys, ureters, bladder, and adjacent structures such as the adrenal glands.PurposeCT scans of the GU tract serve several diagnostic and therapeutic purposes, including:Diagnosis of Urinary Tract Diseases: Detects kidney stones, tumors, cysts, and congenital...
Ultrasonography01:17

Ultrasonography

Ultrasonography is an imaging technique that uses high-frequency sound waves to visualize the body's internal structures. It is a non-invasive and safe procedure that does not involve the use of ionizing radiation, making it widely used in various medical fields. Ultrasonography is used to study heart function, blood flow in the neck or extremities, certain conditions such as gallbladder disease, and fetal growth and development.
During an ultrasonography procedure, a handheld device called a...

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An Approach to Point-Of-Care Ultrasound Evaluation of the Abdominal Aorta
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Published on: September 8, 2023

Optimizing abdominal MR imaging: approaches to common problems.

Roberta K Yang1, Christopher G Roth, Robert J Ward

  • 1Department of Radiology, Thomas Jefferson University, 132 S. 10th Street, Philadelphia, PA 19107, USA. rkjyang@gmail.com

Radiographics : a Review Publication of the Radiological Society of North America, Inc
|January 20, 2010
PubMed
Summary
This summary is machine-generated.

Abdominal magnetic resonance (MR) imaging faces challenges from patient motion and artifacts. Strategies like breath holds and advanced techniques improve image quality and efficiency in abdominal MR scans.

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Area of Science:

  • Medical Imaging
  • Radiology
  • Biophysics

Background:

  • Abdominal magnetic resonance (MR) imaging presents unique challenges due to physiological motion.
  • Motion artifacts, susceptibility, and other effects complicate abdominal MR imaging acquisition.

Purpose of the Study:

  • To outline challenges in abdominal MR imaging.
  • To present techniques for minimizing artifacts and improving efficiency.

Main Methods:

  • Minimizing patient motion through physical restraint, respiratory gating, and reduced acquisition time.
  • Correcting motion-induced dephasing using gradient moment nulling and signal averaging.
  • Reducing acquisition time with fewer phase-encoding steps, shorter repetition times, parallel imaging, and multiecho acquisitions.

Main Results:

  • Techniques effectively minimize artifacts from respiratory, cardiac, gastrointestinal, and voluntary movements.
  • Optimized echo spacing and timing enhance section sampling and image quality.
  • Efficient acquisition strategies reduce scan times within breath-hold constraints.

Conclusions:

  • Minimizing motion and artifacts is crucial for optimizing abdominal MR imaging protocols.
  • Familiarity with MR principles and artifact reduction techniques improves imaging efficiency.
  • Advanced techniques enhance the diagnostic quality and efficiency of abdominal MR scans.