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01.08.2013 | Neuro

Associations among q-space MRI, diffusion-weighted MRI and histopathological parameters in meningiomas

verfasst von: Zareen Fatima, Utaroh Motosugi, Ahmed Bilal Waqar, Masaaki Hori, Keiichi Ishigame, Naoki Oishi, Toshiyuki Onodera, Kazuo Yagi, Ryohei Katoh, Tsutomu Araki

Erschienen in: European Radiology | Ausgabe 8/2013

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Abstract

Objectives

The purposes of this MR-based study were to calculate q-space imaging (QSI)–derived mean displacement (MDP) in meningiomas, to evaluate the correlation of MDP values with apparent diffusion coefficient (ADC) and to investigate the relationships among these diffusion parameters, tumour cell count (TCC) and MIB-1 labelling index (LI).

Methods

MRI, including QSI and conventional diffusion-weighted imaging (DWI), was performed in 44 meningioma patients (52 lesions). ADC and MDP maps were acquired from post-processing of the data. Quantitative analyses of these maps were performed by applying regions of interest. Pearson correlation coefficients were calculated for ADC and MDP in all lesions and for ADC and TCC, MDP and TCC, ADC and MIB-1 LI, and MDP and MIB-1 LI in 17 patients who underwent subsequent surgery.

Results

ADC and MDP values were found to have a strong correlation: r = 0.78 (P = <0.0001). Both ADC and MDP values had a significant negative association with TCC: r = –0.53 (p = 0.02) and –0.48 (P = 0.04), respectively. MIB-1 LI was not, however, found to have a significant association with these diffusion parameters.

Conclusion

In meningiomas, both ADC and MDP may be representative of cell density.

Key Points

• Diffusion-weighted MRI offers possibilities to assess the aggressiveness of meningiomas.

• The q-space imaging-derived mean displacement correlates strongly with apparent diffusion coefficients.

• Both diffusion parameters showed a strong negative association with tumour cell counts.

• Derived mean displacement may help assess the aggressiveness of meningiomas preoperatively.

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Titel: Associations among q-space MRI, diffusion-weighted MRI and histopathological parameters in meningiomas
verfasst von: Zareen Fatima
Utaroh Motosugi
Ahmed Bilal Waqar
Masaaki Hori
Keiichi Ishigame
Naoki Oishi
Toshiyuki Onodera
Kazuo Yagi
Ryohei Katoh
Tsutomu Araki
Publikationsdatum: 01.08.2013
Verlag: Springer Berlin Heidelberg
Erschienen in: European Radiology / Ausgabe 8/2013
Print ISSN: 0938-7994
Elektronische ISSN: 1432-1084
DOI: https://doi.org/10.1007/s00330-013-2823-0

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Associations among q-space MRI, diffusion-weighted MRI and histopathological parameters in meningiomas