<abstract xmlns="http://www.w3.org/1999/xhtml"><sec id="j_raon-2019-0056_s_006_w2aab3b8c82b1b7b1aab1c16b1Aa"><h3>Background</h3><p>Recent advances in MRI technology makes it increasingly more competitive to CT also in the field of interventions. Multi-parametric MRI offers a significant amount of data relevant for characterization of human cerebral thrombi.</p></sec><sec id="j_raon-2019-0056_s_007_w2aab3b8c82b1b7b1aab1c16b2Aa"><h3>Patients and methods</h3><p>Cerebral thrombi of 17 patients diagnosed with acute stroke were acquired by mechanical thrombectomy. The thrombi were subsequently scanned using a high spatial-resolution 3D <italic>T</italic><sub>1</sub>-weighted MRI to obtain morphological characteristics of the thrombi and also by apparent diffusion coefficient (ADC) and transversal nuclear magnetic resonance (NMR) relaxation time (<italic>T</italic><sub>2</sub>) mapping. The MRI results were analysed for possible correlations between thrombectomy procedure parameters (recanalization time and number of passes) and MR-measurable parameters (sample-mean ADC and <italic>T</italic><sub>2</sub>, within-sample coefficient of variation of ADC and <italic>T</italic><sub>2</sub>, and thrombus length).</p></sec><sec id="j_raon-2019-0056_s_008_w2aab3b8c82b1b7b1aab1c16b3Aa"><h3>Results</h3><p>Both MRI mapping techniques enabled a good discrimination among thrombi regions of different water mobility and compaction. Within-sample coefficient of variation of ADC was found most sensitive for discrimination between the thrombi where thrombectomy procedure was performed in a single pass and those where is was performed in two or more passes (p = 0.03). Interestingly, negative correlation was found between the recanalization time and thrombus length (ρ = -0.22).</p></sec><sec id="j_raon-2019-0056_s_009_w2aab3b8c82b1b7b1aab1c16b4Aa"><h3>Conclusions</h3><p>Preliminary results of presented study shows that pretreatment MRI assessment of thrombi in stroke patients could potentially ease stroke treatment planning. In this study it is shown that within-sample coefficient of variation of ADC could serve for prediction of possible complications during thrombectomy procedures.</p></sec></abstract>

BackgroundRecent advances in MRI technology makes it increasingly more competitive to CT also in the field of interventions. Multi-parametric MRI offers a significant amount of data relevant for characterization of human cerebral thrombi.Patients and methodsCerebral thrombi of 17 patients diagnosed with acute stroke were acquired by mechanical thrombectomy. The thrombi were subsequently scanned using a high spatial-resolution 3D T1-weighted MRI to obtain morphological characteristics of the thrombi and also by apparent diffusion coefficient (ADC) and transversal nuclear magnetic resonance (NMR) relaxation time (T2) mapping. The MRI results were analysed for possible correlations between thrombectomy procedure parameters (recanalization time and number of passes) and MR-measurable parameters (sample-mean ADC and T2, within-sample coefficient of variation of ADC and T2, and thrombus length).ResultsBoth MRI mapping techniques enabled a good discrimination among thrombi regions of different water mobility and compaction. Within-sample coefficient of variation of ADC was found most sensitive for discrimination between the thrombi where thrombectomy procedure was performed in a single pass and those where is was performed in two or more passes (p = 0.03). Interestingly, negative correlation was found between the recanalization time and thrombus length (ρ = -0.22).ConclusionsPreliminary results of presented study shows that pretreatment MRI assessment of thrombi in stroke patients could potentially ease stroke treatment planning. In this study it is shown that within-sample coefficient of variation of ADC could serve for prediction of possible complications during thrombectomy procedures.

Retrieved cerebral thrombi studied by <italic>T</italic><sub>2</sub> and ADC mapping: preliminary results

Radiology and Oncology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Retrieved cerebral thrombi studied by  and ADC mapping: preliminary results

BackgroundRecent advances in MRI technology makes it increasingly more competitive to CT also in the field of interventions. Multi-parametric MRI offers a...

Retrieved cerebral thrombi studied by T₂ and ADC mapping: preliminary results

Article Category: Research Article

Published Online: Nov 20, 2019

Page range: 427 - 433

Received: Oct 03, 2019

Accepted: Oct 22, 2019

DOI: https://doi.org/10.2478/raon-2019-0056

© 2019 Jernej Vidmar, Franci Bajd, Zoran V. Milosevic, Igor J. Kocijancic, Miran Jeromel, Igor Sersa, published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Retrieved cerebral thrombi studied by T2 and ADC mapping: preliminary results

Article Category: Research Article

Published Online: Nov 20, 2019

Page range: 427 - 433

Received: Oct 03, 2019

Accepted: Oct 22, 2019

DOI: https://doi.org/10.2478/raon-2019-0056

© 2019 Jernej Vidmar, Franci Bajd, Zoran V. Milosevic, Igor J. Kocijancic, Miran Jeromel, Igor Sersa, published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Retrieved cerebral thrombi studied by T₂ and ADC mapping: preliminary results