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Related Concept Videos

Imaging Studies IV: Magnetic Resonance Imaging01:27

Imaging Studies IV: Magnetic Resonance Imaging

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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,...
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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...
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Imaging Studies for Cardiovascular System IV: CMRI01:21

Imaging Studies for Cardiovascular System IV: CMRI

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Cardiovascular magnetic resonance imaging, or CMRI, is a non-invasive diagnostic test that employs a magnetic field and radiofrequency waves to create precise images of the heart and arteries. It provides comprehensive information about cardiac anatomy, function, perfusion, and tissue characterization without ionizing radiation.IndicationsCMRI diagnoses various heart conditions, including tissue damage from heart attacks, ischemic heart disease, myocarditis, aortic issues (tears, aneurysms,...
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Radiological Investigation II: MRI and Ventilation Perfusion Scan01:30

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Description
Magnetic Resonance Imaging (MRI) and Ventilation Perfusion Scans are two radiological investigations that offer detailed diagnostic images of the body, particularly lung structures.
MRI
MRI uses magnetic fields and radiofrequency signals to distinguish between normal and abnormal tissues. This technology provides a more detailed diagnostic image than CT scans, enabling it to characterize pulmonary nodules, stage bronchogenic carcinoma, and evaluate inflammatory activity in...
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Imaging Studies V: Intravenous Urography and Retrograde Pyelography01:22

Imaging Studies V: Intravenous Urography and Retrograde Pyelography

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IntroductionIntravenous Urography (IVU) and Retrograde Pyelography (RP) are important diagnostic imaging techniques used to evaluate the urinary system. These methods help identify structural abnormalities, obstructions, and functional issues in the kidneys, ureters, and bladder. Both procedures use iodine-based contrast media to enhance the visibility of urinary tract structures on X-ray images, though they differ in their methods and indications.1. Intravenous Urography (IVU)Intravenous...
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Imaging Studies I: CT and MRI01:14

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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.
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In vivo Macrophage Imaging Using MR Targeted Contrast Agent for Longitudinal Evaluation of Septic Arthritis
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Simultaneous bilateral-knee MR imaging.

Feliks Kogan1, Evan Levine1,2, Akshay S Chaudhari1,3

  • 1Department of Radiology, Stanford University, Stanford, California, USA.

Magnetic Resonance in Medicine
|December 19, 2017
PubMed
Summary
This summary is machine-generated.

Simultaneous bilateral knee MRI scans using a dual-coil array offer comparable image quality and quantitative accuracy to single-knee scans. This novel approach can enhance the efficiency and value of MRI knee evaluations.

Keywords:
T2 mappingknee MRIosteoarthritisparallel imaging

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Area of Science:

  • Medical Imaging
  • Magnetic Resonance Imaging (MRI)
  • Musculoskeletal Radiology

Background:

  • Conventional MRI of the knee involves single-knee imaging, which can be time-consuming for bilateral assessments.
  • Evaluating both knees often requires separate scan sessions, increasing patient burden and resource utilization.
  • Developing efficient MRI techniques for simultaneous bilateral knee imaging is crucial for improving diagnostic throughput.

Purpose of the Study:

  • To evaluate the scan time and quantitative accuracy of simultaneous bilateral-knee MRI using a dual-coil array.
  • To compare bilateral-knee imaging performance against conventional single-knee acquisitions.
  • To assess the feasibility of improving MRI knee evaluation value through simultaneous bilateral imaging.

Main Methods:

  • MR imaging hardware modifications were made to enable dual 16-channel flexible coil arrays for bilateral knee imaging.
  • Noise covariance and g-factor maps were computed to assess coil cross-talk and noise amplification.
  • Ten healthy volunteers underwent bilateral and unilateral knee MRI scans on a 3T scanner, followed by radiologist image quality comparison and T2 relaxation time analysis.

Main Results:

  • The dual-coil array configuration demonstrated low mean g-factors, indicating minimal noise amplification and coil cross-talk.
  • Image quality ratings showed no significant difference between bilateral and unilateral acquisitions in 89% of cases.
  • Quantitative T2 relaxation time measurements from bilateral scans exhibited similar agreement and concordance to unilateral scans, comparable to single-coil repeatability.

Conclusions:

  • Simultaneous bilateral knee MRI using a dual-coil array achieves comparable scan times, image quality, and quantitative accuracy to conventional single-knee scans.
  • This technique offers a potential improvement in the efficiency and value of MRI knee examinations.
  • The findings support the clinical utility of simultaneous bilateral knee MRI for comprehensive musculoskeletal assessment.