Evaluation of Aqueductal Stenosis by 3D Sampling Perfection with Application-Optimized Contrasts Using Different Flip Angle Evolutions Sequence: Preliminary Results with 3T MR Imaging

Algın, Oktay; Türkbey, Barış

doi:10.3174/ajnr.a2833

Cited by 44 publications

(47 citation statements)

References 17 publications

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“…11,12 With this technique, thinner section images and 3D data (by using < 1-mm 3 voxels) can be acquired with acceptable acquisition time (approximately 5 minutes), minimizing the partial volume effect between small entities and surrounding tissue. 3,12 Our previous studies demonstrated that T2W 3D-SPACE with variant flip-angle mode images may show the flow dynamics of CSF in the ventricular system. 3,5 Besides, it has been shown that 3D data with high resolution acquired with this technique may demonstrate clearly the morphology of the third ventricle.…”

Section: Discussionmentioning

confidence: 99%

“…3,12 Our previous studies demonstrated that T2W 3D-SPACE with variant flip-angle mode images may show the flow dynamics of CSF in the ventricular system. 3,5 Besides, it has been shown that 3D data with high resolution acquired with this technique may demonstrate clearly the morphology of the third ventricle. 4 Findings in this study are consistent with those of previous ones; it is shown that the 3D-SPACE technique could provide the information obtained when 3D heavily T2W and PC-MRI techniques were used together, and most of the patients (96%) in the study group were diagnosed correctly by using only the 3D-SPACE technique.…”

Section: Discussionmentioning

confidence: 99%

“…2,5 With the development of MRI technology, the whole cranium, including CSF-containing spaces (especially the ventricular system), and CSF circulation are better evaluated with 3D isotropic submillimetric data obtained by 3-T MR units. 3,11 By using a relatively new technique called 3D sampling perfection with application-optimized contrasts using different flip-angle evolutions (3D-SPACE) developed by Mugler et al, it has now become possible to scan the whole cranium with < 1-mm 3 voxels within an acceptable time period and without exceeding specific absorption rate limits in 3-T scanners.…”

mentioning

confidence: 99%

“…12 In our recently published studies we have concluded that the 3D-SPACE technique provides useful information in the determination of type and cause of hydrocephalus, integrity of the third ventricle floor, location and severity of obstruction, and demonstration of CSF circulation. 3,5 The primary purpose of this preliminary study is to determine the value of the 3D-SPACE technique in the evaluation of ETV patency. Our secondary aim is to compare 3D-SPACE with other MR sequences for the diagnosis of ETV patency.…”

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confidence: 99%

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Assessment of third ventriculostomy patency with the 3D-SPACE technique: a preliminary multicenter research study

Algın

Uçar²,

Özmen³

et al. 2015

JNS

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E ndoscopic third ventriculostomy (ETV) is a minimally invasive, safe, and relatively new CSF diversion method; it is mostly used in aqueductal stenosis, but may also be indicated in the treatment of other causes of hydrocephalus.1 With this procedure the inferior wall of the third ventricle is fenestrated, and CSF in the ventricular system is diverted into the prepontine cisternthereby bypassing the obstruction-and CSF circulation is reestablished. 4,7 It is a more physiological treatment option compared with shunt procedures, and therefore it is being done with increasing frequency. 4,7,10 Clinical, laboratory, and conventional imaging findings may be useful to determine whether the ETV stoma is patent, although advanced radiological methods are mostly required. 2,6 Ventriculography is a gold-standard technique for determination of ETV patency. 4 On the other hand, abbreviatioNs ETV = endoscopic third ventriculostomy; PC = phase-contrast cine; T1W, T2W = T1-, T2-weighted; 3D-SPACE = 3D sampling perfection with application-optimized contrasts using different flip-angle evolutions. obJect The goal of this study was to determine the value of the 3D sampling perfection with application-optimized contrasts using different flip-angle evolutions (3D-SPACE) technique in the evaluation of endoscopic third ventriculostomy (ETV) patency. methods Twenty-six patients with ETV were examined using 3-T MRI units. Sagittal-plane 3D-SPACE with variant flip-angle mode, 3D T1-weighted (T1W), and 3D heavily T2-weighted (T2W) images were obtained with isotropic voxel sizes. Also, sagittal-axial plane phase-contrast cine (PC)-MR images were obtained. The following findings were evaluated: diameters of stoma and third ventricle, flow-void sign on 3D-SPACE and PC-MR images, integrity of the third ventricle on heavily T2W images, and quantitative PC-MRI parameters of the stoma. Obtained sequences were evaluated singly, in combination with one another, and all together. results The mean area, flow, and velocity values measured at the level of stoma in patients with patent stoma were significantly higher than those measured in patients with closed stoma (p < 0.05). There was significant correlation among PC-MRI, 3D-SPACE, and 3D heavily T2W techniques regarding assessment of ETV patency (p < 0.001). The 3D-SPACE technique provided the lowest rate of ambiguous results. coNclusioNs The 3D-SPACE technique seems to be the most efficient one for determination of ETV patency. The authors suggest the use of 3D-SPACE as a stand-alone first-line sequence in addition to routine brain MRI protocols in assessing patients with ETV, thereby decreasing scan time and reserving the use of a combination of additional sequences such as PC-MRI and 3D heavily T2W images in suspicious or complex cases.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Assessment of third ventriculostomy patency with the 3D-SPACE technique: a preliminary multicenter research study

Algın

Uçar²,

Özmen³

et al. 2015

JNS

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“…Also the other advantage of 3D sequences with 3 Tesla MR unit is to decrease MR examination time significantly (1). In routine MR examination protocol, T1W and T2W sequences have to be performed in many plans to determine the anatomical structures in wrist.…”

Section: Discussionmentioning

confidence: 99%

Magnetic resonance (MR) imaging of the carpal tunnel and related structures in New Zealand Rabbit (Oryctolagus cuniculus): An anatomic and radiologic evaluation on an animal model

OTO¹

2014

Ankara Üniversitesi Veteriner Fakültesi Dergisi

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Summary:The aim of this study was to determine the anatomical structures in carpal region with the routine T1, T2 weighted (W) and three-dimensional (3D) magnetic resonance (MR) sequences that are frequently being used for the diagnosis and the treatment of the wrist disorders and to indicate the efficacy of MR imaging (MRI) on the rabbit's carpal region which can be a convenient wrist model especially for the carpal tunnel syndrome. It is also aspired to compare the image features obtained from 1.5 and 3 Tesla MR units in terms of anatomy and radiology. Five adult New Zealand rabbits were used in this study. Wrists were scanned in neutral position by 1.5 and 3 Tesla MR devices with a loop coil and a 15-channel transmit-receive birdcage coil respectively. Anatomy of the carpal tunnel was well defined in T1W transverse images in 1.5 Tesla MRI. The median nerve was imaged with greater signal intensity on T2W sequences. In 3 Tesla MRI, the anatomical structures in carpal region could easily be evaluated on high resolution 3D sequences with isotropic voxels and also with the help of thin section reformatted images. According to our results, 3D sequences with isotropic voxel sizes by 15-channel transmit-receive birdcage coil in 3 Tesla MRI device seems to be more efficient than the other routine two-dimensional sequences in 1.5 Tesla MRI for the assessment of carpal tunnel anatomy, diagnosis and treatment of disorders both in humans and in animals. This process also decreases the MRI time and specific absorption rate (SAR) values.

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Aqueductal Stenosis and Hydrocephalus

Frassanito¹,

Göker²,

Rocco³

2018

Textbook of Pediatric Neurosurgery

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Evaluation of Aqueductal Stenosis by 3D Sampling Perfection with Application-Optimized Contrasts Using Different Flip Angle Evolutions Sequence: Preliminary Results with 3T MR Imaging

Abstract: BACKGROUND AND PURPOSE: Diagnosis of AS and periaqueductal abnormalities by routine MR imaging sequences is challenging for neuroradiologists. The aim of our study was to evaluate the utility of the 3D-SPACE sequence with VFAM in patients with suspected AS.

Cited by 44 publications

References 17 publications

Assessment of third ventriculostomy patency with the 3D-SPACE technique: a preliminary multicenter research study

Assessment of third ventriculostomy patency with the 3D-SPACE technique: a preliminary multicenter research study

Magnetic resonance (MR) imaging of the carpal tunnel and related structures in New Zealand Rabbit (Oryctolagus cuniculus): An anatomic and radiologic evaluation on an animal model

Aqueductal Stenosis and Hydrocephalus

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