Three-dimensional-MRI of neurovascular compression in patients with hemifacial spasm

1995 ◽  
Vol 37 (5) ◽  
pp. 350-352 ◽  
Author(s):  
T. Hosoya ◽  
N. Watanabe ◽  
K. Yamaguchi ◽  
S. Saito ◽  
O. Nakai
Keyword(s):  
Hemifacial Spasm ◽  
Three Dimensional ◽  
Neurovascular Compression

Three-dimensional-MRI of neurovascular compression in patients with hemifacial spasm

1995 ◽  
Vol 37 (5) ◽  
pp. 350-352 ◽  
Author(s):  
T. Hosoya ◽  
N. Watanabe ◽  
K. Yamaguchi ◽  
S. Saito ◽  
O. Nakai
Keyword(s):  
Hemifacial Spasm ◽  
Three Dimensional ◽  
Neurovascular Compression

Classification of neurovascular compression in typical hemifacial spasm: three-dimensional visualization of the facial and the vestibulocochlear nerves

2007 ◽  
Vol 107 (6) ◽  
pp. 1154-1163 ◽  
Author(s):  
Ramin Naraghi ◽  
Levent Tanrikulu ◽  
Regina Troescher-Weber ◽  
Barbara Bischoff ◽  
Martin Hecht ◽  
...  
Keyword(s):  
Mr Imaging ◽  
Facial Nerve ◽  
Volume Rendering ◽  
Hemifacial Spasm ◽  
Three Dimensional ◽  
Neurosurgical Procedures ◽  
Neurovascular Compression ◽  
Direct Volume Rendering ◽  
Vestibulocochlear Nerve ◽  
Cerebellar Artery

Object In this paper, the authors introduce a method of noninvasive anatomical analysis of the facial nerve–vestibulocochlear nerve complex and the depiction of the variable vascular relationships by using 3D volume visualization. With this technique, a detailed spatial representation of the facial and vestibulocochlear nerves was obtained. Patients with hemifacial spasm (HFS) resulting from neurovascular compression (NVC) were examined. Methods A total of 25 patients (13 males and 12 females) with HFS underwent 3D visualization using magnetic resonance (MR) imaging with 3D constructive interference in a steady state (CISS). Each data set was segmented and visualized with respect to the individual neurovascular relationships by direct volume rendering. Segmentation and visualization of the facial and vestibulocochlear nerves were performed with reference to their root exit zone (REZ), as well as proximal and distal segments including corresponding blood vessels. The 3D visualizations were interactively compared with the intraoperative situation during microvascular decompression (MVD) to verify the results with the observed microneurosurgical anatomy. Results Of the 25 patients, 20 underwent MVD (80%). Microvascular details were recorded on the affected and unaffected sides. On the affected sides, the anterior inferior cerebellar artery (AICA) was the most common causative vessel. The posterior inferior cerebellar artery, vertebral artery, internal auditory artery, and veins at the REZ of the facial nerve (the seventh cranial nerve) were also found to cause vascular contacts to the REZ of the facial nerve. In addition to this, the authors identified three distinct types of NVC within the REZ of the facial nerve at the affected sides. The authors analyzed the varying courses of the vessels on the unaffected sides. There were no bilateral clinical symptoms of HFS and no bilateral vascular compression of the REZ of the facial nerve. The authors discovered that the AICA is the most common vessel that interferes with the proximal and distal portions of the facial nerve without any contact between vessels and the REZ of the facial nerve on the unaffected sides. Conclusions Three-dimensional visualization by direct volume rendering of 3D CISS MR imaging data offers the opportunity of noninvasive exploration and anatomical categorization of the facial nerve–vestibulocochlear nerve complex. Furthermore, it proves to be advantageous in establishing the diagnosis and guiding neurosurgical procedures by representing original MR imaging patient data in a 3D fashion. This modality provides an excellent overview of the entire neurovascular relationship of the cerebellopontine angle in each case.

Hemifacial spasm: three-dimensional MR images in the evaluation of neurovascular compression.

Radiology ◽  
1995 ◽  
Vol 197 (1) ◽  
pp. 227-231 ◽  
Author(s):  
C Du ◽  
Y Korogi ◽  
S Nagahiro ◽  
Y Sakamoto ◽  
A Takada ◽  
...  
Keyword(s):  
Hemifacial Spasm ◽  
Three Dimensional ◽  
Neurovascular Compression ◽  
Mr Images

Sensitivity of high-resolution three-dimensional magnetic resonance angiography and three-dimensional spoiled-gradient recalled imaging in the prediction of neurovascular compression in patients with hemifacial spasm

2009 ◽  
Vol 111 (4) ◽  
pp. 733-736 ◽  
Author(s):  
Ahmed M. Raslan ◽  
Reynaldo DeJesus ◽  
Caglar Berk ◽  
Andrew Zacest ◽  
Jim C. Anderson ◽  
...  
Keyword(s):  
High Resolution ◽  
Trigeminal Neuralgia ◽  
Blood Vessels ◽  
Hemifacial Spasm ◽  
Predictive Value ◽  
Mr Angiography ◽  
Three Dimensional ◽  
Vascular Compression ◽  
Neurovascular Compression ◽  
Predictive Values

Object Hemifacial spasm is a clinical syndrome caused by vascular compression of the facial nerve in the cerebellopontine angle, which can be relieved by surgical intervention. Advances in medical imaging technology allow for direct visualization of the offending blood vessels in hemifacial spasm and similar conditions (such as trigeminal neuralgia). The utility of high resolution 3D MR angiography and 3D spoiled-gradient recalled (SPGR) imaging sequences for surgical decision-making in hemifacial spasm, as measured by sensitivity, specificity, and positive and negative predictive values, has not been previously determined. Methods A retrospective review was undertaken of 23 patients with hemifacial spasm who underwent operations between January 2001 and December 2006 at Oregon Health & Science University. All patients underwent preoperative high-resolution 3D MR angiography and 3D SPGR imaging. The sensitivity of the SPGR imaging/MR angiography interpretation of neurovascular compression (NVC) by both a neurosurgeon and 2 neuroradiologists was determined in relation to the presence of actual NVC during surgery. Results All patients were found to have NVC at surgery. After review by a neurosurgeon and 2 neuroradiologists, imaging data from 19 of the 23 patients were evaluated. The neurosurgeon's interpretation had a sensitivity of 79% and a positive predictive value (PPV) of 100%. The first neuroradiologist's interpretation had a sensitivity of 21% with a PPV of 100%. Further interpretation by a blinded second neuroradiologist with expertise in MR imaging of hemifacial spasm and trigeminal neuralgia was conducted, and sensitivity was 59% and PPV was 100%. Specificity was not determined because there were no true negative cases. The negative predictive value was 0% for both the neurosurgeon's and neuroradiologists' evaluations. Conclusions Although high-resolution 3D MR angiography and 3D SPGR imaging was helpful in providing information about the anatomical relationship of cranial nerve VII and surrounding blood vessels, the authors determined that in the case of hemifacial spasm these types of imaging did not influence preoperative surgical decisionmaking.

Preoperative Three-Dimensional Diagnosis of Neurovascular Relationships at the Root Exit Zones During Microvascular Decompression for Hemifacial Spasm

2016 ◽  
Vol 92 ◽  
pp. 171-178 ◽  
Author(s):  
Keisuke Ohtani ◽  
Toshihiro Mashiko ◽  
Keiji Oguro ◽  
Atsuhito Takemura ◽  
Toru Hatayama ◽  
...  
Keyword(s):  
Hemifacial Spasm ◽  
Microvascular Decompression ◽  
Three Dimensional ◽  
Dimensional Diagnosis

scholarly journals Three-dimensional Imaging of Abducens Palsy by Neurovascular Compression

2020 ◽  
Vol 59 (2) ◽  
pp. 305-307
Author(s):  
Azusa Sugimoto ◽  
Takeshi Kuroda ◽  
Hiromasa Tsuda ◽  
Kenjiro Ono
Keyword(s):  
Three Dimensional ◽  
Neurovascular Compression ◽  
Abducens Palsy ◽  
Three Dimensional Imaging

Ventrolateral Compression of the Brain Stem in Essential Hypertension: MR Angiography Study

1997 ◽  
Vol 10 (4) ◽  
pp. 403-408
Author(s):  
L. Manfrè ◽  
M. Midiri ◽  
G. Cerasola ◽  
N. Platania ◽  
M. Accardi ◽  
...  
Keyword(s):  
Essential Hypertension ◽  
Diastolic Pressure ◽  
Cranial Nerves ◽  
Three Dimensional ◽  
Ventrolateral Medulla ◽  
Neurovascular Compression ◽  
Gradient Echo ◽  
Tof Mra ◽  
Sequence Ideal ◽  
The Brain

Our purpose was to evaluate neurovascular compression at the level of ventrolateral medulla and NVC with the IXth and the Xth cranial nerves in patients with essential hypertension and in healthy volunteers using high resoluted Spoiled Recalled Gradient Echo (SPGR) sequences, allowing the detection of stationary tissues and moving spins. Thirty patients (19 men and 11 women) with essential hypertension were examined. Patient's ages ranged from 24 to 64 years-old (mean age was 48 y.o.). Patients older than 65 were excluded. The average of systolic blood-pressure of hypertensive patients was 183 ± 10 mmHg, while the diastolic pressure was 98 ± 10.5 mmHg. In conclusion, we consider axial single partitions from a three-dimensional TOF MRA sequence ideal to demonstrate both vascular and neural components of NVC. NVC could explain essential hypertension disease in a significant percentage of patients, even though true idiopathic hypertension - probably less frequent than believed- exists.

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