Comparison of three-dimensional fast spin echo and gradient echo sequences for high-resolution temporal bone imaging

Schmalbrock, Petra

doi:10.1002/1522-2586(200012)12:6<814::aid-jmri4>3.0.co;2-l

Cited by 28 publications

(13 citation statements)

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“…Sie eignet sich zur exakten Tumorvolumetrie in der Verlaufsbeurteilung sowie zur präoperativen Beurteilung des Tumors in Bezug zum Hirnstamm, zum Fundus, zu den Gefäßen und Nerven. Auch die Beurteilung des Innenohrs gelingt am besten mit diesem Sequenztyp [15][16][17]. Die hochaufgelösten T1-w-Sequenzen vor und nach KM-Gabe erleichtern die Detektion sehr kleiner Tumore und die postoperative Beurteilung, insbesondere die Differenzierung zwischen Narbe und Tumorrest bzw.…”

Section: Bildgebende Diagnostikunclassified

Diagnostik und Therapie des Vestibularisschwannoms – eine interdisziplinäre Herausforderung

et al. 2017

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Vestibular schwannomas expand slowly in the internal auditory canal, in the cerebellopontine angle, inside the cochlear and the labyrinth. Larger tumors can displace and compress the brainstem. With an annual incidence of 1:100 000 vestibular schwannoma represent 6-7% of all intracranial tumors. In the cerebellopontine angle they are by far the most neoplasm with 90% of all lesions located in this region. Magnetic resonance imaging (MRI), audiometry, and vestibular diagnostics are the mainstays of the clinical workup for patients harboring tumors. The first part of this paper delivers an overview of tumor stages, the most common grading scales for facial nerve function and hearing as well as a short introduction to the examination of vestibular function.Upholding or improving quality of life is the central concern in counseling and treating a patient with vestibular schwannoma. Preservation of neuronal function is essential and the management options - watchful waiting, microsurgery and stereotactic radiation - should be custom-tailored to the individual situation of the patient. Continuing interdisciplinary exchange is important to monitor treatment quality and to improve treatment results. Recently, several manuscripts and reviews have been published on the topic of vestibular schwanomma. On the occasion of the 88 annual meeting of the German Society of Oto-rhino-laryngology, Head and Neck surgery a special volume of the journal "HNO" will be printed. Hence this presentation has been designed to deviate from the traditional standard which commonly consists of a pure literature review. The current paper was conceptually woven around a series of interdisciplinary cases which outlines examples for every stage of the disease that show characteristic results for management options to date. Systematic clinical decision pathways have been deduced from our experience and from results reported in the literature. These pathways are graphically outlined after the case presentations. Important criteria for decision making are size and growth rate of the tumor, hearing of the patient and the probability of total tumor resection with preservation of hearing and facial nerve function, age and co-morbidity of the patient, best possible control of vertigo and tinnitus and last but not least the patient's preference and choice. In addition to this, the experience and the results of a given center with each treatment modality will figure in the decision making process.We will discuss findings that are reported in the literature regarding facial nerve function, hearing, vertigo, tinnitus, and headache and reflect on recent studies on their influence on the patient's quality of life. Vertigo plays an essential role in this framework since it is an independent predictor of quality of life and a patient's dependence on social welfare.Pathognomonic bilateral vestibular schwannoma that occur in patients suffering from neurofibromatosis typ-2 (NF2) differ from spontaneous unilateral tumors in their biologic behavior. Treatment of neurof...

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Section: Bildgebende Diagnostikunclassified

Diagnostik und Therapie des Vestibularisschwannoms – eine interdisziplinäre Herausforderung

et al. 2017

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“…DRIVE, also called FRFSE, is an FSE sequence that uses a set of additional -90° recovery pulses applied at the end of the echo train to revert the remaining transverse magnetization back to the longitudinal axis. These reset pulses allow heavily T2-weighted images to be acquired with a shorter TR and reduce the scan time considerably (5, 9, 12-14). The shortened TR also has the effect of reducing flow void artifacts, further increasing the brightness of fluids.…”

Section: Discussionmentioning

confidence: 99%

“…Driven equilibrium (DRIVE), a synonym for fast recovery fast spin-echo (FRFSE), is an FSE sequence that uses a set of additional -90° recovery pulses applied at the end of the echo train to accelerate relaxation and reversion of the remaining transverse magnetization back to the longitudinal axis (5, 9, 12-14). Balanced fast field-echo (bFFE) is an FGRE sequence that utilizes a balanced gradient waveform for all gradient directions to provide a very high signal for tissues with a high T2/T1 ratio (8, 10, 13).…”

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confidence: 99%

“…Balanced fast field-echo (bFFE) is an FGRE sequence that utilizes a balanced gradient waveform for all gradient directions to provide a very high signal for tissues with a high T2/T1 ratio (8, 10, 13). There have been several studies that have compared the image quality of various 3D FSE and 3D FGRE sequences to demonstrate the anatomic structures of the IAC and inner ear (5, 6, 10, 12, 13); however, to the best of our knowledge, there has been no study comparing the use of 3D DRIVE and 3D bFFE sequences at 3 Tesla (T). The purpose of this study was to compare 3D DRIVE and 3D bFFE sequences in the assessment of the anatomic structures of the IAC and inner ear with 3T MR.…”

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MR Imaging of the Internal Auditory Canal and Inner Ear at 3T: Comparison between 3D Driven Equilibrium and 3D Balanced Fast Field Echo Sequences

et al. 2008

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ObjectiveTo compare the use of 3D driven equilibrium (DRIVE) imaging with 3D balanced fast field echo (bFFE) imaging in the assessment of the anatomic structures of the internal auditory canal (IAC) and inner ear at 3 Tesla (T).Materials and MethodsThirty ears of 15 subjects (7 men and 8 women; age range, 22-71 years; average age, 50 years) without evidence of ear problems were examined on a whole-body 3T MR scanner with both 3D DRIVE and 3D bFFE sequences by using an 8-channel sensitivity encoding (SENSE) head coil. Two neuroradiologists reviewed both MR images with particular attention to the visibility of the anatomic structures, including four branches of the cranial nerves within the IAC, anatomic structures of the cochlea, vestibule, and three semicircular canals.ResultsAlthough both techniques provided images of relatively good quality, the 3D DRIVE sequence was somewhat superior to the 3D bFFE sequence. The discrepancies were more prominent for the basal turn of the cochlea, vestibule, and all semicircular canals, and were thought to be attributed to the presence of greater magnetic susceptibility artifacts inherent to gradient-echo techniques such as bFFE.ConclusionBecause of higher image quality and less susceptibility artifacts, we highly recommend the employment of 3D DRIVE imaging as the MR imaging choice for the IAC and inner ear.

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“…The 3D fast-recovery fast spin-echo pulse sequence (11,12) makes use of a negative 90°pulse at the end of the echo train, so that bright fluid signal intensity can be achieved with a repetition time of 2 seconds or less. Drawbacks include blurring from T2 decay during the echo train and generally lower S/N unit acquisition time compared with gradient-echo methods.…”

Section: Mr Imagingmentioning

confidence: 99%

Pediatric and Adult Cochlear Implantation

Witte¹,

Lane²,

Driscoll³

et al. 2003

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The frequency of cochlear implantation has increased tremendously over the past decade. Cochlear implantation is often performed as an outpatient procedure and is considered an acceptable treatment for severe to profound sensorineural hearing loss in patients who are refractory to conventional hearing augmentation. Imaging plays an important part in the work-up of cochlear implant candidates, and an understanding of imaging evaluation procedures is essential. The radiologist must be familiar with imaging findings that contraindicate implantation (absence of the cochlea or cochlear nerve) and with those that could significantly alter surgery (facial nerve dehiscence, cochlear ossification). It is also imperative to be familiar with the growing number of imaging options (particularly magnetic resonance [MR] imaging pulse sequences) to optimize evaluation of cochlear implant candidates. Imaging choices will be substantially influenced by the manufacturer of the computed tomographic scanner or MR imager. Radiologists will assume an expanding role in evaluating affected patients as the frequency of cochlear implantation continues to increase.

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Comparison of three-dimensional fast spin echo and gradient echo sequences for high-resolution temporal bone imaging

Cited by 28 publications

References 16 publications

Diagnostik und Therapie des Vestibularisschwannoms – eine interdisziplinäre Herausforderung

Diagnostik und Therapie des Vestibularisschwannoms – eine interdisziplinäre Herausforderung

MR Imaging of the Internal Auditory Canal and Inner Ear at 3T: Comparison between 3D Driven Equilibrium and 3D Balanced Fast Field Echo Sequences

Pediatric and Adult Cochlear Implantation

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