OBJECTIVE: To look for the impact of leak correction on correlation of perfusion indices with microvessel density (MVD) and vascular endothelial growth factor (VEGF) in astrocytomas. METHODS: Dynamic contrast-enhanced magnetic resonance imaging was performed in 64 patients with varying grades of astrocytoma. Perfusion indices (ie, relative cerebral blood volume (rCBV) with and without leak correction, relative cerebral blood flow (rCBF), permeability (k(trans)), and leakage (v(e)) were quantified. MVD and VEGF-expressing cells were quantified from the excised tumor tissues and were correlated with perfusion metrics. RESULTS: Perfusion indices showed significant difference among the astrocytoma grades. The corrected rCBV correlated better with MVD and VEGF. The corrected rCBV correlated (r = 0.853, P = <0.001) strongly, whereas the uncorrected rCBV (r = 0.592, P = <0.001) and k(trans) (r = 0.498, P = 0.001) correlated moderately with tumor grade. The corrected rCBV discriminated 100% low-grade from high-grade astrocytoma, while uncorrected rCBV did this in 95.5% low-grade and 71.4% high-grade astrocytoma. CONCLUSIONS: Corrected rCBV better correlates with grade and is more accurate in discriminating low-grade from high-grade astrocytoma compared with uncorrected rCBV.
OBJECTIVE: To look for the impact of leak correction on correlation of perfusion indices with microvessel density (MVD) and vascular endothelial growth factor (VEGF) in astrocytomas. METHODS: Dynamic contrast-enhanced magnetic resonance imaging was performed in 64 patients with varying grades of astrocytoma. Perfusion indices (ie, relative cerebral blood volume (rCBV) with and without leak correction, relative cerebral blood flow (rCBF), permeability (k(trans)), and leakage (v(e)) were quantified. MVD and VEGF-expressing cells were quantified from the excised tumor tissues and were correlated with perfusion metrics. RESULTS: Perfusion indices showed significant difference among the astrocytoma grades. The corrected rCBV correlated better with MVD and VEGF. The corrected rCBV correlated (r = 0.853, P = <0.001) strongly, whereas the uncorrected rCBV (r = 0.592, P = <0.001) and k(trans) (r = 0.498, P = 0.001) correlated moderately with tumor grade. The corrected rCBV discriminated 100% low-grade from high-grade astrocytoma, while uncorrected rCBV did this in 95.5% low-grade and 71.4% high-grade astrocytoma. CONCLUSIONS: Corrected rCBV better correlates with grade and is more accurate in discriminating low-grade from high-grade astrocytoma compared with uncorrected rCBV.
Authors: Andrés Server; Bjørn A Graff; Tone E Døli Orheim; Till Schellhorn; Roger Josefsen; Øystein B Gadmar; Per H Nakstad Journal: Neuroradiology Date: 2010-09-21 Impact factor: 2.804
Authors: L S Hu; J M Eschbacher; A C Dueck; J E Heiserman; S Liu; J P Karis; K A Smith; W R Shapiro; D S Pinnaduwage; S W Coons; P Nakaji; J Debbins; B G Feuerstein; L C Baxter Journal: AJNR Am J Neuroradiol Date: 2011-11-17 Impact factor: 3.825
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Authors: Anna K Heye; Ross D Culling; Maria Del C Valdés Hernández; Michael J Thrippleton; Joanna M Wardlaw Journal: Neuroimage Clin Date: 2014-09-10 Impact factor: 4.881
Authors: S J Mills; D du Plessis; P Pal; G Thompson; G Buonacorrsi; C Soh; G J M Parker; A Jackson Journal: AJNR Am J Neuroradiol Date: 2015-12-24 Impact factor: 3.825