Search results for "Inversion recovery"

showing 3 items of 13 documents

Magnetresonanztomographie (MRT) der Leber und des Gehirns bei hämatologisch-onkologischen Patienten mit Fieber unbekannter Ursache

1998

PURPOSE To examine the advantage of liver and brain MRI in clinically anomalous haematological patients with fever of unknown origin. MATERIAL AND METHODS Twenty liver MRI (T2-TSE, T2-HASTE, T1-FLASH +/- Gd dynamic) and 16 brain MRI (T2-TSE, FLAIR, T1-TSE +/- Gd) were performed searching for a focus of fever with a suspected organ system. Comparison with clinical follow-up. RESULTS A focus was detected in 11/20 liver MRI. Candidiasis (n = 3), mycobacteriosis (n = 2), relapse of haematological disease (n = 3), graft versus host disease (n = 1), non-clarified (n02). The remaining 9 cases with normal MRI were not suspicious of infectious hepatic disease during follow-up. In brain MRI, 3/16 sho…

MastoiditisPathologymedicine.medical_specialtybusiness.industryFluid-attenuated inversion recoverymedicine.diseaseAspergillosisToxoplasmosisCentral nervous system diseaseGraft-versus-host diseasemedicineRadiology Nuclear Medicine and imagingFever of unknown originbusinessMycosisRöFo - Fortschritte auf dem Gebiet der Röntgenstrahlen und der bildgebenden Verfahren
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Presacral Myelolipoma

2014

Many reports have described adrenal myelolipomas but there have been only a few reports of extra-adrenal myelolipomas. We describe a 74-year-old woman who came to our observation for MRI of the lumbar spine for typical lumbar back pain. In addition to signs of mild scoliosis and spondylo disc arthrosis, MR imaging revealed a presacral mass showing a heterogeneously high signal in all pulse sequences and almost completely suppressed on inversion recovery sequences for fat tissue. CT imaging confirmed the fatty nature of the lesion and no signs of bone involvement. These findings were most consistent with a diagnosis of a rare presacral myelolipoma as confirmed at histopathologic analysis. T…

Myelolipomamedicine.medical_specialtyInversion recoveryMyelolipomamedicineHumansRadiology Nuclear Medicine and imagingAgedMild scoliosisLumbar VertebraeSpinal Neoplasmsbusiness.industryOriginal ArticlesGeneral MedicineAnatomymedicine.diseaseMagnetic Resonance ImagingMr imagingLumbar back painFemaleLumbar spineNeurology (clinical)RadiologyCt imagingDifferential diagnosisTomography X-Ray ComputedbusinessThe Neuroradiology Journal
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Robustness of PET Radiomics Features: Impact of Co-Registration with MRI

2021

Radiomics holds great promise in the field of cancer management. However, the clinical application of radiomics has been hampered by uncertainty about the robustness of the features extracted from the images. Previous studies have reported that radiomics features are sensitive to changes in voxel size resampling and interpolation, image perturbation, or slice thickness. This study aims to observe the variability of positron emission tomography (PET) radiomics features under the impact of co-registration with magnetic resonance imaging (MRI) using the difference percentage coefficient, and the Spearman’s correlation coefficient for three groups of images: (i) original PET, (ii) PET after co-…

TechnologyTomografía de emisión de positronesNeoplasias encefálicasCorrelation coefficientImagen por resonancia magnética:Phenomena and Processes::Mathematical Concepts::Probability::Uncertainty [Medical Subject Headings]QH301-705.5Computer scienceQC1-999:Diseases::Neoplasms::Neoplasms by Site::Nervous System Neoplasms::Central Nervous System Neoplasms::Brain Neoplasms [Medical Subject Headings]:Analytical Diagnostic and Therapeutic Techniques and Equipment::Diagnosis::Diagnostic Techniques and Procedures::Diagnostic Imaging::Magnetic Resonance Imaging [Medical Subject Headings]Co registrationFluid-attenuated inversion recovery:Organisms::Eukaryota::Animals::Chordata::Vertebrates::Mammals::Primates::Haplorhini::Catarrhini::Hominidae::Humans [Medical Subject Headings]Magnetic resonance imagingRadiomicsRobustness (computer science):Analytical Diagnostic and Therapeutic Techniques and Equipment::Diagnosis::Diagnostic Techniques and Procedures::Diagnostic Techniques Radioisotope::Radionuclide Imaging::Tomography Emission-Computed::Positron-Emission Tomography [Medical Subject Headings]Resamplingradiomics feature robustness; imaging quantification; [11C]-methionine positron emission tomography; PET/MRI co-registration Appl.medicineGeneral Materials ScienceBiology (General)QD1-999InstrumentationSettore ING-INF/05 - Sistemi Di Elaborazione Delle InformazioniFluid Flow and Transfer Processesmedicine.diagnostic_testbusiness.industryTPhysicsProcess Chemistry and TechnologyRadiomics feature robustnessGeneral EngineeringPET/MRI co-registrationMagnetic resonance imagingPattern recognitionEngineering (General). Civil engineering (General)Imaging quantificationComputer Science ApplicationsChemistry:Chemicals and Drugs::Amino Acids Peptides and Proteins::Amino Acids::Amino Acids Essential::Methionine [Medical Subject Headings]Positron emission tomography[11C]-methionine positron emission tomography:Analytical Diagnostic and Therapeutic Techniques and Equipment::Diagnosis::Prognosis [Medical Subject Headings]Artificial intelligenceTA1-2040businessApplied Sciences
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