Morphologic Features and Flow Void Phenomenon in Normal Pressure Hydrocephalus and Other Dementias

Algın, Oktay; Hakyemez, Bahattin; Taşkapılıoğlu, Özlem; Ocakoğlu, Gökhan; Bekâr, Ahmet; Parlak, Müfıt

doi:10.1016/j.acra.2009.06.010

Cited by 25 publications

(31 citation statements)

References 23 publications

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“…48 CE-MRC can be used in conjunction with routine MR imaging sequences and PC-MR imaging in diagnosis and treatment-response assessment of NPH. 48,49 Further largescale studies are needed to demonstrate the efficacy of CE-MRC in NPH.…”

Section: Normal Pressure Hydrocephalusmentioning

confidence: 99%

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Intrathecal Gadolinium-Enhanced MR Cisternography: A Comprehensive Review

Algın¹,

Türkbey

2012

AJNR Am J Neuroradiol

109

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SUMMARY: CE-MRC has been in use for the past 15 years and was reported to be a useful method in the evaluation of CSF disorders and hydrocephalus. The use of CE-MRC in conjunction with other MR imaging techniques has been shown to be effective in selected cases for the evaluation of several disorders of cerebrospinal system. CE-MRC has certain advantages over other cisternographic studies with fewer side effects if performed properly. Although intrathecal Gd administration is not widely accepted yet, several recent studies have reported the safety of small-dose intrathecal gadolinium injection. In this review, we describe CE-MRC and review recent applications in several clinical conditions. ABBREVIATIONS: AC ϭ arachnoid cyst; AS ϭ aqueductal stenosis; CE ϭ contrast-material enhanced; CISS ϭ constructive interference in steady state; CTC ϭ CT

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Section: Normal Pressure Hydrocephalusmentioning

confidence: 99%

“…[46][47][48][49] Unfortunately, there is no single noninvasive gold standard test for the diagnosis of NPH. [46][47][48][49] PC-MR imaging is a commonly used test in clinical practice. 50 However, PC-MR imaging cannot always be conclusive for diagnosis and treatment planning.…”

Section: Normal Pressure Hydrocephalusmentioning

confidence: 99%

Intrathecal Gadolinium-Enhanced MR Cisternography: A Comprehensive Review

Algın¹,

Türkbey

2012

AJNR Am J Neuroradiol

109

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“…8 It was graded as present if both narrow sulci at the high convexity and the Sylvian fissure ordinal were graded as Ն1 (Fig 1D). Flow void phenomenon through the aqueduct and fourth ventricle (flow void) was graded by a modified version of the ordinal scale described by Algin et al 9 It was graded as follows: 0 ϭ no flow in the aqueduct, 1 ϭ flow void only in the aqueduct, 2 ϭ flow void in the aqueduct and the upper half of the fourth ventricle, 3 ϭ flow void that extends to the caudal part of the fourth ventricle. It was graded on T2-weighted sagittal images without flow compensation.…”

Section: Imagingmentioning

confidence: 99%

Preoperative Prognostic Value of MRI Findings in 108 Patients with Idiopathic Normal Pressure Hydrocephalus

Virhammar¹,

Laurell

Cesarini

et al. 2014

AJNR Am J Neuroradiol

144

165

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“…These radiological signs are considered useful to differentiate iNPH from other causes of dementia, 3,12 whereas their role in predicting response to shunting remains unclear. 25 One marker of hydrocephalus, the callosal angle (CA, the angle between the lateral ventricles on a coronal image, Fig.…”

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confidence: 99%

The callosal angle measured on MRI as a predictor of outcome in idiopathic normal-pressure hydrocephalus

Virhammar

Laurell

Cesarini³

et al. 2014

JNS

112

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Object Different neuroimaging biomarkers have been studied to find a tool for prediction of response to CSF shunting in idiopathic normal-pressure hydrocephalus (iNPH). The callosal angle (CA) has been described as useful in discriminating iNPH from ventricular dilation secondary to atrophy. However, the usefulness of the CA as a prognostic tool for the selection of shunt candidates among patients with iNPH is unclear. The aim of this study was to compare the CA in shunt responders with that in nonresponders and clarify whether the CA can serve as a predictor of the outcome. Methods Preoperative MRI brain scans were evaluated in 109 patients who had undergone shunt surgery for iNPH during 2006–2010. Multiplanar reconstruction was performed interactively to obtain a coronal image through the posterior commissure, perpendicular to the anterior-posterior commissure plane. The CA was measured as the angle between the lateral ventricles on the coronal image. The patients were examined clinically before surgery and at 12 months postoperatively. Results Shunt responders had a significantly smaller mean preoperative CA compared with nonresponders: 59° (95% CI 56°–63°) versus 68° (95% CI 61°–75°) (p < 0.05). A CA cutoff value of 63° showed the best prognostic accuracy. Conclusions The preoperative CA is smaller in patients whose condition improves after shunt surgery and may be a useful tool in the selection of shunt candidates among patients with iNPH.

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Morphologic Features and Flow Void Phenomenon in Normal Pressure Hydrocephalus and Other Dementias

Cited by 25 publications

References 23 publications

Intrathecal Gadolinium-Enhanced MR Cisternography: A Comprehensive Review

Intrathecal Gadolinium-Enhanced MR Cisternography: A Comprehensive Review

Preoperative Prognostic Value of MRI Findings in 108 Patients with Idiopathic Normal Pressure Hydrocephalus

The callosal angle measured on MRI as a predictor of outcome in idiopathic normal-pressure hydrocephalus

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