Non Echo Planar Diffusion Weighted

High-resolution three-dimensional diffusion-weighted MRI/CT image data fusion for cholesteatoma.

Non echo planar diffusion weighted. Compared diagnostic performances of two incremental MRI protocols including non-echo planar diffusion-weighted imaging acquired on 3T and 1.5T scanners. This technique is also time saving in comparison to delayed post‐contrast imaging. Non-echo-planar imaging was found to be more reliable compared with echo-planar imaging in identifying residual/recurrent cholesteatoma in one systematic review.

Non-echo planar DWI is currently the imaging modality of choice due to its high diagnostic performance in the detection of post-operative cholesteatoma 1-3. Diffusion-weighted magnetic resonance imaging (DWI or DW-MRI) is the use of specific MRI sequences as well as software that generates images from the resulting data that uses the diffusion of water molecules to generate contrast in MR images. Non-echo planar DWI is superior for the.

Non-echo-planar imaging was found to be more reliable compared with echo-planar imaging in identifying residual/recurrent cholesteatoma in one systematic review. False Positive and Negative Imaging for Cholesteatomas on Non-Echo-Planar Diffusion Weighted MR Imaging Prior Tympanomastoidectomy Surgery. However, the DW MRI appearances of postoperative or inflammatory mucosal changes have not been well investigated, thus rendering the interpretation of postoperative DW MRI difficult in the presence of mucosal reactions.

Whereas this fast sequence may be sufficient to screen for residual cholesteatoma in canal. A prospective study of 33 ears, 21 with previous cholesteatoma surgery. This was a prospective study of 16 patients who.

Developed by renowned radiologists in each specialty, STATdx provides comprehensive decision support you can rely on - Pars Tensa Cholesteatoma. Research Article Head and Neck The Diagnostic Accuracy of Non-Echo-Planar Diffusion-Weighted Imaging in the Detection of Residual and/or Recurrent Cholesteatoma of the Temporal Bone M.H.G. As originally defined, echo planar imaging referred to a sequence in which data from all of k-space for an entire 2D plane was collected following a single RF-excitation pulse.

Li PM , Linos E , Gurgel RK et al. With CWU surgery, residual disease can be monitored through the use of non-echo planar diffusion-weighted imaging (DWI) if second-look surgery is to be avoided. Wenhui Huang 1 * Wenhui Huang.

Magnetic resonance imaging (MRI) and in particular diffusion-weighted imaging (DWI) have been broadly proven to be the reference imaging method to discriminate between cholesteatoma and noncholesteatomatous middle ear lesions, especially when high tissue specificity is required. However, the sequence is prone to artefact and care must be taken how the sequence is performed and interpreted 2. Non‐echo‐planar imaging (EPI) MRI has been recently introduced to improve the detection of small‐sized cholesteatoma and decrease different artefacts occurring in the EPI‐diffusion‐weighted (DW) technique.

Compared with the EP DWI sequence, the non-echo-planar diffusion weighted imaging (non-EPI) DW imaging sequence produces thinner slices and has a higher imaging matrix, and it tends to produce fewer magnetic susceptibility artifacts but requires longer imaging times (multi-shot non-echo-planar DWI sequences require approximately 8 min), and non. To evaluate non echo-planar diffusion weighted magnetic resonance imaging (non-EP DW MRI) at 9 months after primary surgery to rule out residual cholesteatoma in patients scheduled before second-look-surgical exploration. The non-echo planar diffusion-weighted MRI (non-EP DWI) sequence is efficient in identifying the restricted diffusion in the substance of cholesteatoma, and, thanks to its sensitivity and precision, has changed the way otolaryngologists manage chronic ear disease.

To describe the accuracy of non-echo-planar diffusion-weighted magnetic resonance imaging (DW MRI) in identifying middle ear cholesteatoma. A systematic review of diffusion-weighted magnetic resonance imaging in the assessment of postoperative cholesteatoma. To investigate the diagnostic value of non–echo planar diffusion-weighted magnetic resonance imaging (DW-MRI) for primary and recurrent/residual (postoperative) cholesteatoma in adults (≥18 years) after canal wall up surgery.

Developed by renowned radiologists in each specialty, STATdx provides comprehensive decision support you can rely on - Pars Flaccida Cholesteatoma. We prospectively assessed the diagnostic accuracy of MRI including delayed post. Previous studies demonstrated that, among DWI acquisition techniques, non-echo-planar imaging (EPI) MRI is a more accurate method in detecting middle ear cholesteatoma compared to EPI and it improves the detection of small-sized cholesteatoma and decreases artifacts occurring in the EPI diffusion weighted technique 1, 2, 4, 8, 11, 12;.

A systematic review of the literature was performed to identify studies in which patients suspected of having middle ear cholesteatoma underwent DW MRI scans prior to surgery. The standard examination is a T2-weighted series in the coronal and axial plane, followed by a non-echo planar DWI series (b-values 0, 1000). Yamashita K, Hiwatashi A, Togao O, et al.

To describe the accuracy of non-echo-planar diffusion-weighted magnetic resonance imaging (DW MRI) in identifying middle ear cholesteatoma.A meta-analysis of the published literature.A systematic review of the literature was performed to identify studies in which patients suspected of having middle ear cholesteatoma underwent DW MRI scans prior to surgery. Role of non-echo-planar diffusion-weighted images in the identification of recurrent cholesteatoma of the temporal bone Radiol Med. 1247 - 1250 6.

Errors Made in HASTE:. It allows the mapping of the diffusion process of molecules, mainly water, in biological tissues, in vivo and non-invasively. Non-echo-planar diffusion-weighted imaging represents an alternative to resolve this problem, once this method is less subject to this type of artifact, besides offering images with higher spatial resolution and thinner slice thickness, allowing the detection.

Recently, non-echo planar diffusion-weighted MR imaging (non-EP DW MRI) has gained much atten-tion due to its short acquisition time and high sensitivity and specificity for detecting even small cholesteatomas of 2 - 3 mm in size 1. Epub 19 Sep. Over the past decade, numerous imaging studies have been performed looking into detection of cholesteatomas, investigating both echo planar imaging (EPI) and non-EPI DWI sequences.

Non-echo-planar diffusion-weighted magnetic resonance imaging is superior to routine echo-planar diffusion-weighted magnetic resonance imaging as it minimises susceptibility artefacts;. Even in diagnostic testing with high sensitivity and specificity, false positives and false negatives occur. A meta-analysis of the published literature.

Non-echo planar diffusion weighted MRI (NEDWI MRI) is accurate in detecting cholesteatoma in the post-operative ear but the effect on surgical decision-making in the setting of revision mastoid surgery using surgical histopathology as the gold standard has not been investigated. Non-echo-planar DWI MR imaging (including the HASTE sequence) has been shown to be highly sensitive and specific for large cholesteatomas. Diffusion-weighted MRI (DW-MRI) is a powerful tool for the detection of cholesteatoma.

Jindal M, Riskalla A, Jiang D, et al. In this retrospective case review, 113 patients with chronic otitis underwent surgery (gold standard) for a clinical. In the modern lexicon these are termed single shot.

To examine the novel use of non-echo-planar diffusion weighted MRI (DWI) in depicting activity and treatment response in active Grave's orbitopathy (GO) by assessing, with inter-observer agreement, for a correlation between its apparent diffusion coefficients (ADCs) and conventional Short tau Inversion Recovery (STIR) MRI signal-intensity ratios (SIRs). The advent of diffusion-weighted MRI (DWMRI), particularly with non-echo planar (non-EPI) protocol, has been suggested as a viable alternative to second look surgery given its superb sensitivity and specificity 8,9,10. Diffusion-weighted (DW) magnetic resonance imaging (MRI) is emerging as an alternative to second-look surgery in ruling out residual or recurrent disease after cholesteatoma eradication.

Dremmen MH, Hofman PA, Hof JR, Stokroos RJ, Postma AA (12) The diagnostic accuracy of non-echo-planar diffusion-weighted imaging in the detection of residual and/or recurrent cholesteatoma of the temporal bone. Fusion of Computed Tomography and PROPELLER Diffusion-Weighted Magnetic Resonance Imaging for the Detection and Localization of Middle Ear Cholesteatoma. JAMA Otolaryngology-- Head & Neck Surgery , 142 (10), 947–53.

This diagnostic accuracy and ability to differentiate between post-surgical granulation and recidivism has led to its. Turbo spin non echo-planar diffusion weighted imaging (NEDWI) sequences were acquired in the coronal and axial plane using a 2 cm field of view and 2 values of the diffusion gradient:. T versus 5| 3, T Non-Echo-Planar Diffusion-Weighted Imaging in the detection of residual or recurrent cholesteatoma in the middle ear, mastoid.

More recently the term has been expanded to include any rapid gradient-echo or spin-echo sequence in which k-space is traversed in one or a small number of excitations. View This Abstract Online;. Non-echo-planar imaging was found to be more reliable compared with echo-planar imaging in identifying residual/recurrent cholesteatoma in one systematic review.

The aim of this study was to determine the certainty of non-echo-planar imaging diffusion-weighted magnetic resonance imaging (non-EPI DW MRI) in the diagnosis of primary and recurrent cholesteatoma in patients with clinical suspicion of cholesteatoma, assessing the sensitivity and specificity of the test in both groups. This study retrospectively compares diagnostic performance of 1.5 T versus 3 T non-echo planar diffusion weighted imaging with or without additional T1 and T2 sequences in the detection of residual and/or recurrent cholesteatoma. Non–echo-planar (EP) diffusion-weighted (DW) imaging had significantly higher sensitivity than delayed gadolinium-enhanced T1-weighted MR imaging.

On the DWI images with b-value 1000 s/mm 2, a cholesteatoma becomes apparent as a hyperintense area. Potential value of non-echo-planar diffusion-weighted imaging of the nasopharynx:. Sevy A, Sappington JM, Mehta R.

To examine the novel use of non-echo-planar diffusion weighted MRI (DWI) in depicting activity and treatment response in active Grave’s orbitopathy (GO) by assessing, with inter-observer agreement, for a correlation between its apparent diffusion coefficients (ADCs) and conventional Short tau Inversion Recovery (STIR) MRI signal-intensity ratios (SIRs). Authors Andrea Romano 1. Recent studies have shown that non-echo planar (non-EPI) diffusion-weighted (DW) magnetic resonance imaging (MRI) can accurately predict the presence and extent of cholesteatoma in both primary and.

However, the addition of this facility involves expensive magnetic resonance scanner upgrading. Non echo planar, diffusion-weighted magnetic resonance imaging (periodically rotated overlapping parallel lines with enhanced reconstruction sequence) compared with echo planar imaging for the detection of middle-ear cholesteatoma. Non-EPI requires also shorter acquisition time in comparison to delayed postcontrast sequences conventionally used in cholesteatoma imaging 2, 4, 7, 8, 13.

Another systematic review found that non-echo-planar diffusion-weighted MRI is highly sensitive and specific in identifying middle-ear cholesteatoma. The purpose of this study was to determine the diagnostic accuracy of HASTE DWI for the detection of incipient cholesteatoma in high-risk retraction pockets. The aim of our study was to evaluate the importance of a non-injected T1-weighted spin-echo sequence (T1WSE) combined with a non-echo-planar diffusion-weighted (non-EPDW) sequence for the pre-operative detection of cholesteatoma by the radiologist on MRI, compared to surgery.

The signal intensity should be higher than visible on the DWI images with b-value 0 s/mm 2. To assess the utility of DWI with echo-planar (EPI-DWI) and non-echo-planar (PROPELLER) sequences for the diagnosis of primary and recurrent cholesteatoma. A primary study for differential diagnosis between recurrent nasopharyngeal carcinoma and post-chemoradiation fibrosis Show all authors.

Diffusion-weighted imaging is particularly useful when distinguishing a cholesteatoma from other middle ear masses. The images were analysed and reported by a single, blinded consultant head and neck radiologist with experience and expertise in temporal bone imaging. The combination of delayed gadolinium-enhanced T1-weighted MR imaging and non-EP DW imaging yielded no higher sensitivity than non-EP DW imaging alone.

Diffusion-weighted magnetic resonance imaging (DWI) is an alternative to second-look surgery for the detection of cholesteatoma. ( 13 ) Evaluating the utility of non echo-planar diffusion-weighted imaging in the preoperative evaluation of cholesteatoma:. It is the only entity that demonstrates high signal intensity on DWI.

S Velthuis, K J van Everdingen, J J Quak and D R Colnot, The value of non echo planar, diffusion-weighted magnetic resonance imaging for the detection of residual or recurrent middle-ear cholesteatoma, The Journal of Laryngology & Otology, 10.1017/S, 128, 07, (599-603), (14). The aim of this study is to define a range of apparent diffusion coefficient (ADC) values within which. The diagnostic accuracy of 1.