Image artifacts during MRT hybrid hyperthermia--causes and elimination
J Gellermann1, H Faehling, M Mielec
1Clinic for Radiotherapy, Charité-Universitätsmedizin Berlin, 13353 Berlin, Germany. johanna.gellermann@charite.de
Summary
Hybrid hyperthermia requires high-quality MRI imaging. This study demonstrates detecting and eliminating image artifacts caused by additional frequencies, ensuring effective treatment control.
Area of Science:
- Medical Physics
- Oncology
- Radiology
Background:
- Online MR-thermometry is crucial for controlling hyperthermia treatments.
- Excellent image quality is essential for analyzing subtracted images during hyperthermia.
Purpose of the Study:
- To address image artifacts in hybrid hyperthermia systems.
- To demonstrate the detection and elimination of spurious frequencies impacting MRI quality.
Main Methods:
- Utilized a hybrid hyperthermia system combining two high-frequency devices (64 MHz and 100 MHz).
- Employed a 1.5 T MRI scanner for imaging and a BSD 2000 3D unit for hyperthermia.
- Used a spectrum analyzer to detect image artifacts caused by interfering frequencies.
Main Results:
- Identified two distinct image artifacts arising from the introduction of additional frequencies.
- Successfully detected and eliminated these spurious frequencies in two case studies.
- Confirmed the feasibility of MRI quality control for multi-frequency hyperthermia systems.
Conclusions:
- Hybrid hyperthermia necessitates superior imaging for optimal performance.
- Spectrum analyzers are effective tools for identifying artifact-inducing frequencies.
- RF filters can successfully eliminate interfering frequencies, enabling reliable MRI quality control.
More Related Videos
08:19Protocol for the Evaluation of MRI Artifacts Caused by Metal Implants to Assess the Suitability of Implants and the Vulnerability of Pulse Sequences
Published on: May 17, 2018
09:21Human Brown Adipose Tissue Depots Automatically Segmented by Positron Emission Tomography/Computed Tomography and Registered Magnetic Resonance Images
Published on: February 18, 2015
Related Concept Videos
01:24Magnetic 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...
01:14Imaging 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...
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...
01:27Imaging 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,...
01:21Imaging Studies for Cardiovascular System IV: CMRI
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,...
01:30Radiological Investigation I: X-ray and CT
Radiological investigations, including X-rays and computed tomography (CT) scans, are critical for diagnosing and evaluating various medical conditions. These imaging techniques provide valuable insights into the body's internal structures, aiding in the detection of abnormalities, assessment of disease progression, and development of treatment strategies. This article delves into two primary radiological investigations, chest X-rays and CT scans, outlining their purpose, procedures, and the...
01:27Imaging 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...