DCE and DSC MR perfusion imaging in the differentiation of recurrent tumour from treatment-related changes in patients with glioma

•We use DCE and DSC perfusion MRI to differentiate recurrence from treatment change.•We get CBV from DSC MRI and Ktrans and iAUC from DCE MRI using commercial software.•Perfusion MRI shows promise in distinguishing treatment changes from recurrence.•CBV from DSC MRI and Ktrans and iAUC from DCE MRI are elevated in recurrent tumors.

AimTo retrospectively compare the utility of perfusion magnetic resonance imaging (MRI) in distinguishing treatment-related changes from recurrent disease in glioma patients.Materials and methodsThirty-one patients with histologically diagnosed gliomas and increased enhancement after or during concurrent (chemo-) radiation therapy were enrolled. They underwent dynamic contrast-enhanced (DCE) permeability MRI followed by dynamic susceptibility contrast (DSC) perfusion MRI. The vascular transfer constant (rKtrans) and initial areas under the concentration curve (riAUC) were obtained from DCE MRI, and cerebral blood volume (rCBV) was obtained from DSC MRI. Patients were classified as having treatment-related changes or recurrent tumours based on clinicoradiological results or pathological results from surgery.ResultsNineteen patients were diagnosed as having recurrences and 12 patients as having treatment-related changes. The rKtrans, riAUC, and rCBV values in the recurrent group were significantly higher than the values in the group with treatment-related changes (p < 0.05). For all 31 patients, there was no significant difference between DSC MRI and DCE MRI for the differentiating power between recurrence and treatment-related changes (p = 0.7227). However, when including only the 24 patients with concordant values of rKtrans and riAUC, DCE MRI showed a significant AUC value of 0.786 in the receiver operating characteristic (ROC) curve analysis (p = 0.003), whereas DSC MRI did not (AUC = 0.643, p = 0.229).ConclusionMRI perfusion images appear to show promise in distinguishing treatment-related changes from recurrent tumours. When both rKtrans and riAUC show concordant values, DCE MRI seems to be more powerful than DSC MRI in the differentiation of recurrence from treatment-related changes.