Voxel-based mapping of five MR biomarkers in the wrist bone marrow.

Objective: MRI is a reliable and accurate technique to characterize rheumatoid arthritis. The aim of this study was to provide voxel-by-voxel 3D maps of the proton density fat fraction (PDFF), the T of water (T), the T of fat (T), the T* of water (T*), the T* of fat (T*) in the wrist bone marrow.

Materials And Methods: The experiments were conducted on 14 healthy volunteers (mean age: 24 ± 4).

Confounding factors in multi-parametric q-MRI protocol: A study of bone marrow biomarkers at 1.5 T.

Object: The MRI tissue characterization of vertebral bone marrow includes the measurement of proton density fat fraction (PDFF), T and T* relaxation times of the water and fat components (T, T, T*, T*), IVIM diffusion D, perfusion fraction f and pseudo-diffusion coefficient D*. However, the measurement of these vertebral bone marrow biomarkers (VBMBs) is affected with several confounding factors. In the current study, we investigated these confounding factors including the regional variation taking the example of variation between the anterior and posterior area in lumbar vertebrae, B inhomogeneity and the effect of fat suppression on f.

Measurements of Diffusion and Perfusion in Vertebral Bone Marrow Using Intravoxel Incoherent Motion (IVIM) With Multishot, Readout-Segmented (RESOLVE) Echo-Planar Imaging.

Background: A limited number of studies have used the intravoxel incoherent motion (IVIM) approach on bone marrow. In none of the previous studies were the effects of fat suppression on the IVIM parameters investigated.

Purpose: To measure the water diffusion coefficient and the perfusion fraction in vertebral bone marrow using IVIM with multishot, readout-segmented (RESOLVE) echo-planar imaging and to assess the effects of different fat suppression techniques on the measurement of the IVIM parameters.

Using an Elastic Band Device After a Severe Obstetric Pubic Symphyseal Separation: Clinical and Imaging Evaluation.

Background: Severe separation of the pubic symphysis is a rare delivery complication. Facing this pathology, we decided to study a new elastic band device.

Method: To evaluate the elastic band device, clinical (pain-rated) and imaging (magnetic resonance imaging and radiography) evaluations with and without the device were performed.

A fast method for the quantification of fat fraction and relaxation times: Comparison of five sites of bone marrow.

Purpose: Bone marrow is found either as red bone marrow, which mainly contains haematopoietic cells, or yellow bone marrow, which mainly contains adipocytes. In adults, red bone marrow is principally located in the axial skeleton. A recent study has introduced a method to simultaneously estimate the fat fraction (FF), the T1 and T2* relaxation times of water (T1w, T2*w) and fat (T1f and T2*f) in the vertebral bone marrow.