Radiosurgery for cerebral arteriovenous malformations: Assessment of early phase magnetic resonance imaging and significance of gadolinium-DTPA enhancement

Morikawa, Minoru; Numaguchi, Y.; Rigamonti, Daniele; Kuroiwa, Toshiro; Rothman, Michael; Zoarski, Gregg H.; Simard, Joyce; Eisenberg, Howard M.; Amin, Pradip

doi:10.1016/0360-3016(95)02160-4

Cited by 25 publications

(11 citation statements)

References 24 publications

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“…Six of them were symptomatic, but all totally recovered after tapering steroid medication. Others have reported that asymptomatic radiation-induced changes appear frequently on MR images [12][13][14]. The incidence rate reported by Lunsford et al [10] was 24%.…”

Section: Complicationsmentioning

confidence: 80%

“…The new unit has 30 cobalt-60 sources (initial activity 200 Ci each), which are distributed spirally around the hemispherical body. 4 sets of collimators in different sizes (diameter of 4,8,14, and 18 mm) are built into the single carrier and can be easily selected by the treatment control unit. The convergent gamma beams can produce a nearly spherical volume with the synchronous rotation of the source body and the second collimator body during irradiation.…”

Section: Rotating Gamma Systemmentioning

confidence: 99%

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Rotating Gamma System Radiosurgery for Cerebral Arteriovenous Malformations

Dongxue¹,

Liu²,

Yu³

et al. 2000

Stereotact Funct Neurosurg

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One hundred and thirty-two patients with cerebral arteriovenous malformations (AVMs) were treated using the Rotating Gamma System, a new radiosurgical system between November 1996 and May 2000. The average size of the AVMs was 23 mm in diameter (range 6 to 69 mm). The mean dose delivered to the AVM margin was 19.2 Gy (range 13 to 25 Gy), and that delivered to the center of the AVMs was 37.6 Gy (range 32.5 to 50 Gy). One hundred and six patients were followed up for an average of 18.4 months (range 5 to 44 months). Five patients (4.7%) experienced rebleeding which took place between 5 and 13 months after treatment, but none of them died from hemorrhage. No bleeding took place after complete angiographic obliteration. Neuroimaging studies showed radiation-induced edema in 19 (22%) of the 87 patients, none of whom had severe permanent neurological deficits. Of the 68 patients followed up for more than one year, 57 underwent angiography at 1 year after treatment. The complete obliteration was demonstrated in 24 patients (42%) at 1 year. Of the 27 patients followed for more than 2 years, 23 patients underwent angiography 2 years after treatment, and complete obliteration was demonstrated in 18 patients (78%). These results are comparable to the results of treatment with other radiosurgical systems.

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Section: Complicationsmentioning

confidence: 80%

Section: Rotating Gamma Systemmentioning

confidence: 99%

Rotating Gamma System Radiosurgery for Cerebral Arteriovenous Malformations

Dongxue¹,

Liu²,

Yu³

et al. 2000

Stereotact Funct Neurosurg

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“…A disadvantage of contrast-enhanced MR angiography is its nonselective character and the simultaneous visualization of arteries and veins [134]. The diagnostic value of MR angiography has shown to be enhanced by Gd-DTPA in patients with intracranial vascular lesions such as vascular malformations [132,135], supratentorial tumors [136], large aneurysms [132] or angiomas [137]. Although vascular lesions demonstrated on intracranial MR angiography show a high correlation with infarct distribution [138], little is known of the clinical potential of contrast-enhanced MR angiography in the diagnosis of ischemic stroke.…”

Section: Mr Angiographymentioning

confidence: 99%

Multifunctional magnetic resonance imaging of cerebrovascular disease

Mali¹

1998

European Radiology

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Over the last few years magnetic resonance imaging (MRI) has developed into a multipurpose imaging technique. In addition to anatomical information, data can be obtained on perfusion, metabolism and imaging of the vascular anatomy. Especially in the field of neuroradiology the possibilities for obtaining multifunctional information from combined MR examinations are promising. In particular, stroke or stroke-related research benefits from these developments. This article reviews the current status and the potential of newly developed MR techniques with regard to the intracranial hemodynamic changes in patients with severe stenosis or occlusion of the internal carotid artery. The combination of MR angiography, perfusion-weighted MRI and MR spectroscopic imaging seems especially useful in the management of the individual patient.

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“…Because of this, a more precise 3D target shape is now required for radiosurgical planning. Gadolinium-enhanced 3D time-of-flight magnetic resonance angiography (MRA) and computed tomographic angiography (CTA) are the imaging modalities which can provide detailed 3D information on the AVM shape [3][4][5][6][7][8][9][10][11][12] . However, discrepancies are frequently experienced between the target created on an MRA or CTA, and the target on stereotactic angiography 5 .…”

Section: Introductionmentioning

confidence: 99%

“…However, discrepancies are frequently experienced between the target created on an MRA or CTA, and the target on stereotactic angiography 5 . The authors of previous publications have attributed the cause of this discrepancy to the poor depiction of AVM on biplanar stereotactic angiography 1,[3][4][5][6][7][8][9][10][11] ; however, none of these publications compared the targets created only on an MRA with those created only on a stereotactic Aoyama et al 5 angiography. In this study, therefore, we compared the target created on an MRA with the target created on a stereotactic angiography, in order to investigate the possible cause of the discrepancy between these two modalities.…”

Section: Introductionmentioning

confidence: 99%

Comparison of imaging modalities for the accurate delineation of arteriovenous malformation, with reference to stereotactic radiosurgery

Aoyama

Shirato

Katoh

et al. 2005

International Journal of Radiation Oncology*Biology*Physics

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Purpose: To investigate the discrepancy between the arteriovenous malformations (AVMs) seen on magnetic resonance angiography (MRA), and seen on stereotactic digital subtracted angiography (DSA). VMRA covered less than 80% of VDSA in any dimensions in 9 cases (32%), although no significant difference was seen in the target volume between each method with a mean value of 11.9 cc for VDSA and 12.3 cc for VMRA (p=0.948). Conclusion:The shift of centers between each modality is not negligible. Considering no significant difference between VDSA and VMRA, but inadequate coverage of the VDSA by VMRA, it is reasonable to consider that the target on MRA might include the feeding artery and draining vein, and possibly miss a portion of the nidus. Aoyama et al. 3

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Radiosurgery for cerebral arteriovenous malformations: Assessment of early phase magnetic resonance imaging and significance of gadolinium-DTPA enhancement

Cited by 25 publications

References 24 publications

Rotating Gamma System Radiosurgery for Cerebral Arteriovenous Malformations

Rotating Gamma System Radiosurgery for Cerebral Arteriovenous Malformations

Multifunctional magnetic resonance imaging of cerebrovascular disease

Comparison of imaging modalities for the accurate delineation of arteriovenous malformation, with reference to stereotactic radiosurgery

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