The study is aimed at assessing changes in the bone marrow of patients from 6 to 18 years old with a diagnosis of acute lymphoblastic leukemia during chemotherapy. Patients of the same age without hematological diseases will be recruited as a control group.
The ratio of fat to water in the bone marrow depends on the cellularity of the bone marrow. In addition to the water/fat ratio in bone marrow there are also other parameters for quantitative MRI assessment. These include the apparent diffusion coefficient (ACD), the T1 relaxation time, mapping of the macromolecular proton fraction. The undoubted advantage of MRI is its non-invasiveness and the ability to assess any localization of the bone marrow. MRI may become a new non-invasive method for assessing the ratio of fat to cells in the bone marrow in children with hematological malignancies, which can help in making a diagnosis and monitoring the response to therapy.
Study Type
INTERVENTIONAL
Allocation
NON_RANDOMIZED
Purpose
DIAGNOSTIC
Masking
NONE
Enrollment
150
Dynamics of Bone marrow fat fraction by mDixon-quant (%)
Dmitry Rogachev National Research Center of Pediatric Hematology, Oncology and Immunology
Moscow, Russia
RECRUITINGDynamics of Bone marrow fat fraction
Dynamics of Bone marrow fat fraction by mDixon-quant (%)
Time frame: Point 1. Before the start of therapy - the starting point.
Dynamics of Bone marrow fat fraction
Dynamics of Bone marrow fat fraction by mDixon-quant (%)
Time frame: Point 2. 15 ± 3 days after the start of the therapy.
Dynamics of Bone marrow fat fraction
Dynamics of Bone marrow fat fraction by mDixon-quant (%)
Time frame: Point 3. 36 ± 3 days after the start of the therapy.
Dynamics of Bone marrow fat fraction
Dynamics of Bone marrow fat fraction by mDixon-quant (%)
Time frame: Point 4. through study completion, an average of 2 year
T1 maping (ms)
T1 mapping is a magnetic resonance imaging technique used to calculate the T1 time
Time frame: Point 1. Before the start of therapy - the starting point. Point 2. 15 ± 3 days after the start of the therapy. Point 3. 36 ± 3 days after the start of the therapy. Point 4. through study completion, an average of 2 year
apparent diffusion coefficient (mm2/s)
Apparent diffusion coefficient (ADC) is a measure of the magnitude of diffusion (of water molecules) within tissue, and is commonly clinically calculated using MRI with diffusion-weighted imaging (DWI).
Time frame: Point 1. Before the start of therapy - the starting point. Point 2. 15 ± 3 days after the start of the therapy. Point 3. 36 ± 3 days after the start of the therapy. Point 4. through study completion, an average of 2 year
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bone marrow fat fraction (FF) by spectroscopy (%)
Fat fraction (FF)-this is the ratio of unconfounded fat signal to the sum of the unconfounded fat and water signals
Time frame: Point 1. Before the start of therapy - the starting point. Point 2. 15 ± 3 days after the start of the therapy. Point 3. 36 ± 3 days after the start of the therapy. Point 4. through study completion, an average of 2 year
The macromolecular proton fraction (MPF)
The macromolecular proton fraction (MPF) is a quantitative MRI parameter determining the magnetization transfer (MT) effect in tissues, and is defined as the relative amount of immobile macromolecular protons involved in magnetization exchange with mobile water protons.
Time frame: Point 1. Before the start of therapy - the starting point. Point 2. 15 ± 3 days after the start of the therapy. Point 3. 36 ± 3 days after the start of the therapy. Point 4. through study completion, an average of 2 year