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- W4379538764 abstract "Considering liver as the reference, that both fast diffusion (PF) and slow diffusion (Dslow) of the spleen are much underestimated is likely due to the MRI properties of the spleen such as the much longer T2 relaxation time. It is possible that longer T2 relaxation time partially mitigates the signal decay effect of various gradients on diffusion weighted image. This phenomenon will not be limited to the spleen. Most liver tumors have a longer T2 relaxation time than their native normal tissue and this is considered to be associated with oedema. On the other hand, most tumors are measured with lower MRI diffusion (despite being oedematous). The reason why malignant tumors have lower diffusion value [apparent diffusion coefficient (ADC) and Dslow] are poorly understood but has been proposed to be related to a combination of higher cellularity, tissue disorganization, and increased extracellular space tortuosity. These explanations may be true, but it is also possible to that many tumors have MRI properties similar to the spleen such as longer T2 (relative to the liver) and these MRI properties may also contribute to the lower MRI measured ADC and Dslow . In other words, if we could hypothetically plant a piece of spleen tissue in the liver, MRI would recognize this planted spleen tissue as being similar to a tumor and measure it to have lower diffusion than the liver." @default.
- W4379538764 created "2023-06-07" @default.
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- W4379538764 date "2023-06-03" @default.
- W4379538764 modified "2023-09-27" @default.
- W4379538764 title "The contribution of T2 relaxation time to diffusion MRI quantification and its clinical implications: a hypothesis" @default.
- W4379538764 doi "https://doi.org/10.48550/arxiv.2306.02011" @default.
- W4379538764 hasPublicationYear "2023" @default.
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