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AJNR. American Journal of Neuroradiology

W Yuan, J Sun
No abstract text is available yet for this article.
November 15, 2018: AJNR. American Journal of Neuroradiology
C Zhu, X Tian, A J Degnan, J Lu, Q Liu
No abstract text is available yet for this article.
November 15, 2018: AJNR. American Journal of Neuroradiology
H-J Kwon, Y D Cho, J W Lim, H-S Koh, D H Yoo, H-S Kang, M H Han
BACKGROUND AND PURPOSE: Aneurysms arising from the proximal A1 segment of the anterior cerebral artery are rare, and their distinctive configurations often pose technical challenges during endovascular embolization. Herein, we present 11 patients with proximal A1 aneurysms requiring a contralateral approach (via the anterior communicating artery) to coil embolization. MATERIALS AND METHODS: From a prospectively collected data repository, we retrieved records of 11 patients consecutively treated for proximal A1 aneurysms between January 2011 and March 2018...
November 15, 2018: AJNR. American Journal of Neuroradiology
M Trelles, A K Ahmed, C H Mitchell, I Josue-Torres, D Rigamonti, A M Blitz
BACKGROUND AND PURPOSE: Endoscopic third ventriculostomy is a well-accepted treatment choice for hydrocephalus and is used most frequently with a known impediment to CSF flow between the third ventricle and basal cisterns. However, there are scarce data on the imaging evolution of the defect in the floor of the third ventricle and how this affects patency rates and clinical outcomes. The purpose of this study was to assess whether, and how, the endoscopic third ventriculostomy defect changes in size with time...
November 15, 2018: AJNR. American Journal of Neuroradiology
D C Mihal, Y Feng, M L Kodet, C M Lohse, M L Carlson, J I Lane
BACKGROUND AND PURPOSE: Bony internal auditory canal diverticula are relatively common, occurring in approximately 5% of temporal bone CTs. Internal auditory canal diverticula have historically been considered incidental; however, a recent publication reported that internal auditory canal diverticula are associated with sensorineural hearing loss. The objective of this study was to further characterize this potential association in a large cohort of patients. MATERIALS AND METHODS: A total of 1759 patients undergoing high-resolution temporal bone CT were collected during a 6-year interval, and audiometric data were obtained from those with internal auditory canal diverticula...
November 15, 2018: AJNR. American Journal of Neuroradiology
M Shapiro, A Shapiro, E Raz, T Becske, H Riina, P K Nelson
BACKGROUND AND PURPOSE: Flow diversion is being increasingly used to treat bifurcation aneurysms. Empiric approaches have generally led to encouraging results, and a growing body of animal and ex vivo literature addresses the fate of target aneurysms and covered branches. Our prior investigations highlighted the dynamic nature of metal coverage provided by the Pipeline Embolization Device and suggested strategies for creating optimal single and multidevice constructs. We now address the geometric and hemodynamic aspects of jailing branch vessels and neighboring target aneurysms...
November 15, 2018: AJNR. American Journal of Neuroradiology
D Mata-Mbemba, Y Iimura, L-N Hazrati, A Ochi, H Otsubo, O C Snead, J Rutka, E Widjaja
BACKGROUND AND PURPOSE: Abnormalities of oligodendrocytes have been reported in surgical specimens of patients with medically intractable epilepsy. The aim of this study was to compare the MR imaging, magnetoencephalography, and surgical outcome of children with oligodendrocytosis relative to focal cortical dysplasia I. MATERIALS AND METHODS: Oligodendrocytosis included oligodendroglial hyperplasia, oligodendrogliosis, and oligodendroglial-like cells in the white matter, gray matter, or both from children with medically intractable epilepsy...
November 15, 2018: AJNR. American Journal of Neuroradiology
(no author information available yet)
No abstract text is available yet for this article.
November 15, 2018: AJNR. American Journal of Neuroradiology
P J Nicholson, C A Hilditch, W Brinjikji, A C O Tsang, R Smith
Sacral insufficiency fractures result in significant morbidity, and percutaneous sacroplasty has emerged as a promising technique for their treatment. We present a technical note regarding our method of treating these fractures using a "single-needle" lateral technique with a combination of conebeam CT and biplane fluoroscopy. We treated 10 patients, in whom the median Visual Analog Scale pain score decreased from 7.0 to 0 ( P < .001). We concluded that single-needle sacroplasty is feasible and safe using this technique...
November 15, 2018: AJNR. American Journal of Neuroradiology
Y Hannawi, L R Yanek, B G Kral, D Vaidya, L C Becker, D M Becker, P A Nyquist
BACKGROUND AND PURPOSE: Traditional cardiovascular risk factors have been associated with white matter disease. Because hypertension results in vascular stiffness and impaired cerebral perfusion, we hypothesized that it would be the most relevant risk factor for microstructural white matter disruption in apparently healthy middle-aged individuals with a family history of early-onset coronary artery disease. MATERIALS AND METHODS: This was a cross-sectional analysis of participants in the Genetic Study of Atherosclerosis Risk with DTI...
November 15, 2018: AJNR. American Journal of Neuroradiology
R Bourcier, I Derraz, S Bracard, C Oppenheim, O Naggara
In a prospective study among patients in the THRombectomie des Artères Cerebrales trial, we analyzed the diagnostic accuracy of 2 imaging biomarkers, the 2-layered susceptibility vessel sign and a high overestimation ratio, obtained on pretreatment brain T2* sequences, to identify cardioembolic stroke etiology (107/260 patients). In combination, these 2 biomarkers, on 1.5T or 3T systems (159 and 101 patients, respectively), demonstrated high specificity (0.77 at 1.5T and 1 at 3T) and their simultaneous presence is highly associated with cardioembolism...
November 15, 2018: AJNR. American Journal of Neuroradiology
A H Abusrair, S Bohlega, A Al-Semari, F S Al-Ajlan, K Al-Ahmadi, B Mohamed, A AlDakheel
BACKGROUND AND PURPOSE: Woodhouse-Sakati syndrome is a rare autosomal recessive disorder characterized by hypogonadism, alopecia, diabetes mellitus, and progressive extrapyramidal signs. The disease is caused by biallelic pathogenic variants in the DCAF17 gene. The purpose of this study was to describe the spectrum of brain MR imaging abnormalities in Woodhouse-Sakati syndrome. MATERIALS AND METHODS: We reviewed brain MR images of 26 patients with a clinical and genetic diagnosis of Woodhouse-Sakati syndrome (12 males, 14 females; age range, 16-45 years; mean age, 26...
November 8, 2018: AJNR. American Journal of Neuroradiology
M Warntjes, I Blystad, A Tisell, E-M Larsson
BACKGROUND AND PURPOSE: Administration of a gadolinium-based contrast agent is an important diagnostic biomarker for blood-brain barrier damage. In clinical use, detection is based on subjective comparison of native and postgadolinium-based contrast agent T1-weighted images. Quantitative MR imaging studies have suggested a relation between the longitudinal relaxation rate and proton-density in the brain parenchyma, which is disturbed by gadolinium-based contrast agents. This discrepancy can be used to synthesize a contrast-enhancement map based solely on the postgadolinium-based contrast agent acquisition...
November 8, 2018: AJNR. American Journal of Neuroradiology
B Bender, T-K Hauser, A Korn, U Klose, M Tatagiba, U Ernemann, F H Ebner
BACKGROUND AND PURPOSE: Intraoperative obliteration of the superior petrosal vein complex has a relevant risk of postoperative complications. A large venous diameter and the absence of anastomoses have been previously suggested as possible risk factors. 3D contrast-enhanced MRA was evaluated for the identification of superior petrosal vein anatomy. MATERIALS AND METHODS: Twenty-five patients (10 men; age, 20-77 years) with a 3D-MRA (voxel size, 0.4 × 0.4 × 0.5 mm3 ) at 3T, including the posterior fossa, were retrospectively identified...
November 8, 2018: AJNR. American Journal of Neuroradiology
K Aydin, S Men, M Barburoglu, S Sencer, S Akpek
BACKGROUND AND PURPOSE: Coiling complex intracranial bifurcation aneurysms often necessitates the implantation of double stents in various configurations, such as Y-stent placement. Low-profile braided stents have been introduced recently to facilitate the endovascular treatment of wide-neck aneurysms. We aimed to investigate the feasibility, safety, efficacy, and durability of Y-stent-assisted coiling with double low-profile braided stents for the treatment of complex bifurcation aneurysms...
November 8, 2018: AJNR. American Journal of Neuroradiology
D Behme, N Amelung, T Khakzad, M-N Psychogios
BACKGROUND AND PURPOSE: Endovascular treatment of intracranial aneurysms has relevantly changed over the past decades. Multiple new devices such as intrasaccular flow diverters have broadened the treatment spectrum but require very exact aneurysm sizing. In this study, we investigated multidetector and flat panel angiographic CT and digital subtraction imaging as well as different postprocessing methods (multiplanar reconstruction, volume-rendering technique, 3D DSA, and conventional 2D angiography) for their ability to exactly size 2 aneurysm models...
November 8, 2018: AJNR. American Journal of Neuroradiology
S Van Hedent, N G Hokamp, K R Laukamp, N Buls, R Kessner, B Rose, P Ros, D Jordan
BACKGROUND AND PURPOSE: Conventional CT often cannot distinguish hemorrhage from iodine extravasation following reperfusion therapy for acute ischemic stroke. We investigated the potential of spectral detector CT in differentiating these lesions. MATERIALS AND METHODS: Centrifuged blood with increasing hematocrit (5%-85%) was used to model hemorrhage. Pure blood, blood-iodine mixtures (75/25, 50/50, and 25/75 ratios), and iodine solutions (0-14 mg I/mL) were scanned in a phantom with attenuation ranging from 12 to 75 HU on conventional imaging...
November 8, 2018: AJNR. American Journal of Neuroradiology
W-J Moon, M Park, M Hwang, J K Kim
BACKGROUND AND PURPOSE: While posttraumatic anosmia is not uncommon, the olfactory function evaluation has strongly relied on subjective responses given by patients. We aimed to examine the utility of fMRI as an objective tool for diagnosing traumatic anosmia. MATERIALS AND METHODS: Sixteen patients (11 men and 5 women; mean age, 42.2 ± 10.4 years) with clinically diagnosed traumatic anosmia and 19 healthy control subjects (11 men and 8 women; mean age, 29.3 ± 8...
November 8, 2018: AJNR. American Journal of Neuroradiology
K-P Stein, C Moenninghoff, A Kneist, I E Sandalcioglu, M Forsting, U Sure
BACKGROUND AND PURPOSE: Arterial transdural blood supply is a rare angiographic phenomenon in cerebral AVMs. This study aimed to evaluate angiographic transdural blood supply characteristics and to describe the clinical peculiarities of these lesions. MATERIALS AND METHODS: A prospective AVM data base of 535 patients, enrolled from 1990 to 2016, was analyzed retrospectively. Clinical information was reviewed through patients' medical charts and radiologic studies...
November 8, 2018: AJNR. American Journal of Neuroradiology
C M Tomblinson, G P Fletcher, T K Lidner, C P Wood, S M Weindling, J M Hoxworth
Venous malformations in the parapharyngeal space are rare and may be challenging to diagnose with imaging secondary to multiple overlapping features with pleomorphic adenoma, which is much more commonly found in this region. While both lesions are T1 isointense and T2 hyperintense relative to skeletal muscle and demonstrate contrast enhancement, more uniform T2 hyperintensity and progressive contrast pooling on delayed postcontrast T1WI may allow the radiologist to include venous malformation in the differential diagnosis...
November 8, 2018: AJNR. American Journal of Neuroradiology
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