MR imaging in patients with intractable complex partial epileptic seizures.

Brooks, B S; King, David; Gammal, T el; Meador, Kimford J.; Yaghmai, Farivar; Smith, Joseph R.; Flanigin, Herman F.

doi:10.2214/ajr.154.3.2106225

Cited by 33 publications

(44 citation statements)

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“…65 A further five studies reported incorrectly localised scans, ranging from 2 to 7%. 33,41,56,106,115 Three used site of surgery as the reference standard, 33,56,115 and the remaining two a combination of tests. 41,106 The observed heterogeneity in the localisation categories could not be explained by variation in reference standard used, weighting of scan (T1 or T2), slice orientation, number of patients, patient spectrum (adults and/or children), proportion of male to female, year of publication (a surrogate for improved technology) or the subgroup investigated.…”

Section: Results Of the Reviewmentioning

confidence: 99%

“…Test for heterogeneity: I 41 Venz, 1994 110 Zhou, 1994 30,33,46,54,77 For the purpose of further analysis, these studies were considered to have included patients with both temporal and nontemporal lobe epilepsy as we assumed that they would have made it clear if they had been restricted to patients with a particular type of epilepsy. Only two studies included an appropriate patient spectrum.…”

Section: Figure 10 Unclear Timing Spect: Proportion Of Scans In Each mentioning

confidence: 99%

“…30,33,46,54,109 Four studies did not report on type of epilepsy and one study was restricted to patients with temporal lobe epilepsy. 109 Only one study included an appropriate patient spectrum.…”

Section: Ctmentioning

confidence: 99%

“…One study used ictal EEG as the reference standard, 109 one interictal EEG, 46 one ictal EEG in some patients and interictal in others, 54 one site of surgery 33 and one a combination of site of surgery and pathology. 30 The reference standard was considered inappropriate in the two studies that used interictal EEG as the reference standard in some or all patients.…”

Section: Ctmentioning

confidence: 99%

“…One factor that may account for some of the observed heterogeneity in the proportion of correctly localised scans was magnet strength. Of the six studies reporting fewer than 40% correctly localising scans, 31,33,46,58,106,109 three used a low magnet strength machine. One used either 0.3 or 0.35 T 106 and two used 0.5 T. 31,109 Two studies used 1.5 T, which was the most common magnet strength employed, 33,46 and one did not report on the magnet strength.…”

mentioning

confidence: 99%

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A systematic review of the effectiveness and cost-effectiveness of neuroimaging assessments used to visualise the seizure focus in people with refractory epilepsy being considered for surgery

Whiting¹,

Gupta²,

Burch³

et al. 2006

Health Technol Assess

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Section: Results Of the Reviewmentioning

confidence: 99%

Section: Figure 10 Unclear Timing Spect: Proportion Of Scans In Each mentioning

confidence: 99%

Section: Ctmentioning

confidence: 99%

Section: Ctmentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

A systematic review of the effectiveness and cost-effectiveness of neuroimaging assessments used to visualise the seizure focus in people with refractory epilepsy being considered for surgery

Whiting¹,

Gupta²,

Burch³

et al. 2006

Health Technol Assess

View full text Add to dashboard Cite

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Magnetic resonance image–based hippocampal volumentry: Correlation with outcome after temporal lobectomy

Jack

Sharbrough

Cascino

et al. 1992

Annals of Neurology

401

160

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We developed a magnetic resonance imaging (MRI)-based technique for measuring the volume of the hippocampal formation. In this study, the relationship between volumes of the hippocampal formation and outcome (i.e., postoperative seizure control) after anterior temporal lobectomy for intractable epilepsy was analyzed in 50 consecutive patients in whom the surgical specimen did not contain an epileptogenic mass lesion. Outcome was classified as either satisfactory or unsatisfactory. A significant relationship was found between outcome and volume of the operated hippocampal formation (p = 0.012), as well as a derived volumetric measure (nonoperated minus operated volume of the hippocampal formation) (p = 0.004). The association between outcome and nonoperated volume was borderline (p = 0.057). Thirty-four (97%) of 35 patients in whom the volumetric study and electroencephalography (EEG) concordantly lateralized the seizure disorder had satisfactory postoperative seizure control. Conversely, only 7 (42%) of 12 patients in whom the volume study was nonlateralizing and 1 (33%) of 3 in whom the EEG and volume study were discordant has a satisfactory outcome. We regard our MRI-based study of hippocampal formation volume as a noninvasive surrogate for the identification of moderate or severe mesial temporal sclerosis. The technique is a useful adjunct in a multidisciplinary, preoperative epilepsy evaluation when T2-weighted MRIs do not reveal an epileptogenic mass lesion. The reasons for the usefulness of this imaging technique are: (1) It is an independent source of information on seizure lateralization, (2) it will provide information as to expected postoperative outcome, and (3) it may aid in appropriately selecting patients for invasive preoperative monitoring studies.

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Clinical applications of diffusion tensor imaging

Dong

Welsh

Chenevert

et al. 2003

Magnetic Resonance Imaging

183

137

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Directionally-ordered cellular structures that impede water motion, such as cell membranes and myelin, result in water mobility that is also directionally-dependent. Diffusion tensor imaging characterizes this directional nature of water motion and thereby provides structural information that cannot be obtained by standard anatomic imaging. Quantitative apparent diffusion coefficients and fractional anisotropy have emerged from being primarily research tools to methods enabling valuable clinical applications. This review describes the clinical utility of diffusion tensor imaging, including the basic principles of the technique, acquisition, data analysis, and the major clinical applications.

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MR imaging in patients with intractable complex partial epileptic seizures.

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Cited by 33 publications

References 0 publications

A systematic review of the effectiveness and cost-effectiveness of neuroimaging assessments used to visualise the seizure focus in people with refractory epilepsy being considered for surgery

A systematic review of the effectiveness and cost-effectiveness of neuroimaging assessments used to visualise the seizure focus in people with refractory epilepsy being considered for surgery

Magnetic resonance image–based hippocampal volumentry: Correlation with outcome after temporal lobectomy

Clinical applications of diffusion tensor imaging

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