Search results for "T1 weighted"

showing 3 items of 3 documents

Balance of T1-weighted images before and after application of a paramagnetic substance (Gd-DTPA)

1987

Ten patients with encephalitis disseminata and 10 patients with cerebral ischemia underwent computed tomography and magnetic resonance imaging examinations. The results before and after the application of contrast media were compared. It is shown that T1-weighted MRI images, even after application of gadolinium-DTPA, are of little value for differential diagnosis of these diseases. In contrast, T2-weighted images did support the diagnosis of an acute stage of encephalitis disseminata versus acute ischemia. This was also true for lesions that had not been adequately depicted by computed tomography.

AdultGadolinium DTPAMalemedicine.medical_specialtyIschemiaGadoliniumComputed tomographyDiagnosis DifferentialOrganometallic CompoundsmedicineT1 weightedHumanscardiovascular diseasesmedicine.diagnostic_testbusiness.industryMultiple sclerosisBrainMagnetic resonance imagingGeneral MedicineMiddle AgedPentetic Acidmedicine.diseaseMagnetic Resonance ImagingIschemic Attack TransientEncephalitisFemaleSurgeryNeurology (clinical)RadiologyNeurosurgeryDifferential diagnosisbusinessNuclear medicineEncephalitisNeurosurgical Review
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Improved contrast for myeloma focal lesions with T2-weighted Dixon images compared to T1-weighted images

2019

International audience; Purpose: The purpose of this study was twofold. First, to compare the contrast between spinal multiple myeloma (MM) focal lesions and surrounding bone marrow obtained on T2-weighted Dixon fat-only MR images to that obtained on T1-weighted spin-echo images. Second, to search for correlation between bone marrow fat fraction assessed by T2-weighted Dixon sequence and International Myeloma Working Group myeloma defining events.Materials and methods: A total of 39 patients with 112 focal MM lesions were included. There were 25 men and 14 women with a mean age of 68.8±9.8 [SD] years (range: 49-88 years). Contrast between focal MM lesions and surrounding bone marrow was cal…

Malemedia_common.quotation_subject[SDV]Life Sciences [q-bio]Signal-To-Noise Ratio030218 nuclear medicine & medical imagingLesion03 medical and health sciences0302 clinical medicineBone MarrowImage Interpretation Computer-AssistedmedicineT1 weightedHumansContrast (vision)Radiology Nuclear Medicine and imagingMagnetic resonance imaging (MRI)Correlation testMultiple myelomaAgedRetrospective Studiesmedia_commonAged 80 and overSpinal NeoplasmsRadiological and Ultrasound Technologybusiness.industryMean ageGeneral MedicineMiddle AgedImage Enhancementmedicine.diseaseDixon sequenceMagnetic Resonance Imaging[SDV] Life Sciences [q-bio]medicine.anatomical_structure030220 oncology & carcinogenesisFemaleBone marrowmedicine.symptomMultiple MyelomabusinessT2 weightedNuclear medicine
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Focal liver lesions hyperintense on T1-weighted magnetic resonance images.

2009

This article reviews focal liver lesions hyperintense on T1-weighted magnetic resonance (MR) images and describes the underlying etiologies associated with their T1 signal intensity. Although focal liver lesions are commonly detected because of their iso- or hypointensity on T1-weighted images, lesions (benign or malignant) may present with T1 hyperintensity when they contain T1 shortening elements--such as fat, hemorrhage, copper, melanin, and highly concentrated proteins. Our discussion includes the description of state-of-the-art T1-weighted MR sequences and the imaging features of lesions on pre- and postcontrast MR images that are characteristic for lesion composition and useful for ma…

medicine.medical_specialtymedicine.diagnostic_testbusiness.industryLiver DiseasesContrast MediaMagnetic resonance imagingMagnetic Resonance ImagingHyperintensityLesionDiagnosis DifferentialImaging Three-DimensionalmedicineT1 weightedHumansRadiology Nuclear Medicine and imagingRadiologySignal intensityMr imagesmedicine.symptombusinessNuclear medicineSeminars in ultrasound, CT, and MR
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