Ictal focal hyperperfusion demonstrated by arterial spin-labeling perfusion MRI in partial epilepsy status

Oishi, Makoto; Ishida, Go; Morii, Ken; Hasegawa, Kenji; Sato, Mitsuya; Fujii, Yukihiko

doi:10.1007/s00234-012-1027-7

Cited by 38 publications

(30 citation statements)

References 10 publications

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“…In interictal state, hyperintense signals on DWI disappears and ASL demonstrates hypoperfusion or normal perfusion. 60,61 In our case (Fig. 9), cortical hyperperfusion was symmetrical, contemporary with severe headache, preceded the seizure and can therefore be attributed to PRES.…”

Section: Perfusionmentioning

confidence: 79%

Neuroimaging features in posterior reversible encephalopathy syndrome: A pictorial review

Ollivier

Bertrand

Clarençon

et al. 2017

Journal of the Neurological Sciences

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Posterior reversible encephalopathy syndrome (PRES) is a radioclinical entity associating nonspecific neurological symptoms (headache, seizures, impairment of alertness, visual disturbances…) occurring in evocative clinical condition (hypertension, eclampsia, immunosuppressor agents, systemic lupus erythematosus…). In the acute stage, the typical imaging finding is a vasogenic edema predominant in the subcortical parietal-occipital white matter. The purpose of this pictorial review is to illustrate the different neuroimaging features of PRES and present key radiological elements to assert diagnosis. In this overview, we examine the following points: the distributions of vasogenic edema, hemorrhage, the varying patterns in diffusion and perfusion, the different types of enhancement encountered and the vascular modifications demonstrated by angiography. The cause of PRES is still unknown. Nevertheless, catheter angiography, MR angiography and MR perfusion features in PRES render further insight into its pathophysiology. Follow-up imaging shows evidence of radiologic improvement in the very large majority of cases in 1 or 2weeks, sometimes in up to 1month. Recurrent PRES attacks are uncommon. Atypical imaging presentation should not reject the diagnosis of PRES in a compatible clinical situation.

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Section: Perfusionmentioning

confidence: 79%

Neuroimaging features in posterior reversible encephalopathy syndrome: A pictorial review

Ollivier

Bertrand

Clarençon

et al. 2017

Journal of the Neurological Sciences

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“…3,7,[11][12][13][14][15] These MRI findings of low apparent diffusion coefficient and high signals on DW-MRI in SE resemble those of acute ischemic stroke, indicating changes attributable to both cytotoxic and vasogenic edema. 4,7 Such ictal changes on ASL and DW-MRI were reversible in most cases. 5,7 In the present study, using serial MRI including DW-MRI and ASL and electroencephalography (EEG) recording, we examined 2 patients with nonconvulsive partial SE clinically resembling recurrent infarction around the old infarction.…”

mentioning

confidence: 91%

“…4,7 Such ictal changes on ASL and DW-MRI were reversible in most cases. 5,7 In the present study, using serial MRI including DW-MRI and ASL and electroencephalography (EEG) recording, we examined 2 patients with nonconvulsive partial SE clinically resembling recurrent infarction around the old infarction.…”

mentioning

confidence: 92%

“…[6][7][8][9][10] When the hyperperfusion is no longer sufficient to supply the hyperactive cortical area, pathophysiologic changes leading to cytotoxic edema in epileptic cortical neurons can occur, which appear as an abnormal high signal in the cortical lamina (cortical hyperintensity) on DW-MRI. 3,7,[11][12][13][14][15] These MRI findings of low apparent diffusion coefficient and high signals on DW-MRI in SE resemble those of acute ischemic stroke, indicating changes attributable to both cytotoxic and vasogenic edema. 4,7 Such ictal changes on ASL and DW-MRI were reversible in most cases.…”

mentioning

confidence: 98%

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Nonconvulsive Partial Status Epilepticus Mimicking Recurrent Infarction Revealed by Diffusion-weighted and Arterial Spin Labeling Perfusion Magnetic Resonance Images

Kanazawa

Morioka

Arakawa

et al. 2015

Journal of Stroke and Cerebrovascular Diseases

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“…Dedicated ASL perfusion MRI studies should evaluate the influence of increased rScO 2 values in combination with hyperperfusion vs. increased rScO 2 values without hyperperfusion on neurodevelopmental outcome. In addition, we want to mention that hyperperfusion has been visualized in an epileptogenic focus during epileptic activity (18). However, we consider this unlikely to be the cause of hyperperfusion because aEEG monitoring was performed in close proximity to MRI and did not reveal any remaining epileptic activity.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of perinatal arterial ischemic stroke using noninvasive arterial spin labeling perfusion MRI

et al. 2013

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Background: Arterial spin labeling (ASL) magnetic resonance imaging (MRI) can evaluate brain perfusion in neonates noninvasively. The aim of this study was to investigate whether ASL MRI can demonstrate perfusion abnormalities in neonates diagnosed with perinatal arterial ischemic stroke (PAIS). Methods: Pulsed ASL perfusion MR images were acquired in the subacute stage (5-6 d after birth) and at follow-up (13 d to 16 wk after birth) in four PAIS patients. Images were visually evaluated for hypo-and hyperperfusion. In addition, cerebral oxygenation was monitored using near infrared spectroscopy (NIRS). results: In three PAIS patients, ASL images showed hypoperfusion in the stroke area. In one of these, hyperperfusion was visualized in the periphery of the stroke area. In one PAIS patient, hyperperfusion was seen in the stroke area. In all infants, cerebral oxygenation was higher in the infarcted hemisphere as compared with the contralateral hemisphere. Follow-up ASL images showed partial recovery of perfusion in the stroke area. conclusion: ASL perfusion MRI is able to reliably detect hypo-and hyperperfusion in PAIS patients and can be used to monitor the evolution of perfusion after an ischemic event.

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Ictal focal hyperperfusion demonstrated by arterial spin-labeling perfusion MRI in partial epilepsy status

Cited by 38 publications

References 10 publications

Neuroimaging features in posterior reversible encephalopathy syndrome: A pictorial review

Neuroimaging features in posterior reversible encephalopathy syndrome: A pictorial review

Nonconvulsive Partial Status Epilepticus Mimicking Recurrent Infarction Revealed by Diffusion-weighted and Arterial Spin Labeling Perfusion Magnetic Resonance Images

Evaluation of perinatal arterial ischemic stroke using noninvasive arterial spin labeling perfusion MRI

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