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Magnetic Resonance Imaging01:24

Magnetic Resonance Imaging

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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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Computed Tomography01:10

Computed Tomography

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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...
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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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Positron Emission Tomography01:29

Positron Emission Tomography

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Positron emission tomography (PET) is a medical imaging technique involving radiopharmaceuticals — substances that emit short-lived radiation. Although the first PET scanner was introduced in 1961, it took 15 more years before radiopharmaceuticals were combined with the technique and revolutionized its potential.
One of the main requirements of a PET scan is a positron-emitting radioisotope, which is produced in a cyclotron and then attached to a substance used by the part of the body...
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Imaging Studies I: CT and MRI01:14

Imaging Studies I: CT and MRI

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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.
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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Imaging Studies III: Computed Tomography01:27

Imaging Studies III: Computed Tomography

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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...
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Updated: Sep 9, 2025

Author Spotlight: Optimized Lung MRI Protocol with Computationally Efficient Reconstruction Methods
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広範なMRIシミュレーションのためのGpu加速 JEMRIS

Aizada Nurdinova1,2, Stefan Ruschke3, Michael Gestrich4

  • 1Department of Radiology, Stanford University, Stanford, USA. nurdaiza@stanford.edu.

Magma (New York, N.Y.)
|September 4, 2025
PubMed
まとめ
この要約は機械生成です。

グラフィック処理ユニット (GPU) の並列化は,JEMRISにおけるブロックシミュレーションを加速し,より迅速なMRIアーティファクト分析を可能にします. この改良により,より複雑なシミュレーションが可能になり,磁気共鳴画像 (MRI) 現象に対するより深い洞察が得られます.

キーワード:
ブロックシミュレーションGPU 加速ジェムリスモーション・アーティファクト定量的なMRI

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科学分野:

  • 医療用イメージング
  • 計算物理
  • 磁気共鳴画像 (MRI)

背景:

  • JEMRISはMRIシミュレーションのためのオープンソースツールです.
  • 複雑なMRIシナリオでは,ブロックシミュレーションの加速が不可欠です.

研究 の 目的:

  • JEMRISをGPU並列化で強化し,Blochシミュレーションを高速化する.
  • JEMRISのシミュレーションツールの性能と能力を向上させる.

主な方法:

  • CUDA C++でGPU加速のためにJEMRISのキークラスを再実装した.
  • 統合された非同期通信と混合精度サポート.
  • GPU-JEMRISとCPU-JEMRISとKomaMRI.jlを比較した

主要な成果:

  • CPUと比較して3〜12 (二重精度) と7〜65 (単一精度) の加速因数を達成した.
  • 極小の精度差 (<0.1% NRMSE) を証明した.
  • 肝臓脂肪の定量化におけるシミュレートされた動きは 重要なバイアスを示しています

結論:

  • GPU-JEMRISは,CUDA対応のGPUで加速されたBlochシミュレーションを可能にします.
  • より現実的で計算が難しいMRIシミュレーションを可能にします.
  • 大規模なスピンプールとダイナミックなMRI効果における先進的な研究の可能性を広げています.