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Related Concept Videos

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...
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 VII: Vascular Imaging01:19

Imaging Studies VII: Vascular Imaging

DefinitionRenal angiography, also known as renal arteriography, is an imaging technique used to obtain a comprehensive view of blood flow and the vascular structure of blood vessels in the kidneys and surrounding areas.PurposeRenal angiography detects blood vessel abnormalities in the kidneys, such as aneurysms, stenosis, thrombosis, vascular tumors, and renal artery stenosis. It evaluates kidney function and guides interventional treatments like angioplasty or stent placement.Pre-Procedure...
Computed Tomography01:10

Computed Tomography

Tomography refers to imaging by sections. Computed tomography (CT) is a non-invasive imaging technique that uses computers to analyze several cross-sectional X-rays to reveal minute details about structures in the body.
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
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...

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Tracking the Mammary Architectural Features and Detecting Breast Cancer with Magnetic Resonance Diffusion Tensor Imaging
15:48

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Published on: December 15, 2014

Evaluation of multicoil breast arrays for parallel imaging.

Helen Marshall1, Patrick M Devine, Nishanthan Shanmugaratnam

  • 1Department of Imaging Research, Sunnybrook Health Sciences Centre, Toronto, ON, Canada. helen.marshall@sri.utoronto.ca

Journal of Magnetic Resonance Imaging : JMRI
|January 26, 2010
PubMed
Summary

Smaller, adjustable breast MRI coils offer higher signal-to-noise ratio (SNR) for improved SENSE-accelerated imaging. A 16-element array demonstrated superior performance for advanced breast MRI applications.

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Area of Science:

  • Magnetic Resonance Imaging (MRI)
  • Medical Imaging Technology

Background:

  • Breast MRI utilizes multicoil arrays for enhanced signal detection.
  • Accelerated imaging techniques like SENSE reduce scan times but can impact image quality.

Purpose of the Study:

  • To compare the performance of three different multicoil breast arrays.
  • To evaluate their suitability for both conventional and SENSE-accelerated MRI.

Main Methods:

  • Assessed two commercial 8-element coils and one prototype 16-element coil using a phantom.
  • Evaluated signal-to-noise ratio (SNR), g-factor, and uniformity.
  • Tested performance with SENSE acceleration in multiple directions.

Main Results:

  • The 16-element adjustable coil array yielded the highest SNR.
  • The fixed 8-element coil showed the best uniformity.
  • All coils supported SENSE acceleration in the left-right direction; the 16-element coil also enabled superior-inferior acceleration.

Conclusions:

  • Adjustable, smaller coil elements near breast tissue enhance SNR compared to larger, fixed elements.
  • Multicoil arrays with high intrinsic SNR and low g-factors are crucial for high-quality accelerated breast MRI.