MR imaging for evaluation of lesions of the cranial vault: a pictorial essay

Amaral, Lázaro Luís Faria do; Chiurciu, Miriam; Almeida, João Ricardo Maltez de; Ferreira, Nelson Fortes; Mendonça, Renato Adam; Lima, Swiany Silveira

doi:10.1590/s0004-282x2003000400001

Cited by 51 publications

(51 citation statements)

References 6 publications

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“…While computed tomography can visualize bone destruction or a mineralized tumor matrix in particular [2], MRI is used due to the better soft tissue contrast for tissue characterization, spatial assignment to compartments, and visualization of an extraosseous component [3].…”

Section: Introductionmentioning

confidence: 99%

Cross Sectional Imaging of Solitary Lesions of the Neurocranium

Schäfer

Koch

Streitparth

et al. 2017

Fortschr Röntgenstr

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ABSTR AC TBackground Although a wide range of processes along the neurocranium are of a benign nature, there are often difficulties in the differential diagnosis.Method In the review CT/MRI scans of the head were evaluated retrospectively regarding solitary lesions along the neurocranium. The majority of the lesions were histologically proven.Results The purpose of the review is to present typical pathologies of the neurocranium and provide a systematic overview based on 12 entities, their locations, prevalence and radiological characteristics.Conclusion Processes, which primarily originate from the neurocranium have to be differentiated from secondary processes infiltrating the neurocranium. For this important diagnostic feature, MRI is typically essential, while the definitive diagnosis is often made on the basis of the medical history and the typical appearance on computer tomography. Key Points▪ There are often difficulties in the precise differential diagnosis of solitary lesions along the neurocranium. Typical solitary pathologies of the neurocranium based on 12 entities were presented. Both magnetic resonance imaging and computed tomography are often essential for an exact differential diagnosis. Schlussfolgerung Unterschieden werden müssen Prozesse, die primär vom Neurokranium ausgehen, von sekundären Prozessen, die das Neurokranium infiltrieren. Für dieses wichtige diagnostische Merkmal ist die MRT meistens unverzichtbar, während die definitive Diagnose dann unter Berücksichti-gung der Anamnese mit dem typischen Erscheinungsbild in der CT häufig gestellt werden kann.

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Section: Introductionmentioning

confidence: 99%

Cross Sectional Imaging of Solitary Lesions of the Neurocranium

Schäfer

Koch

Streitparth

et al. 2017

Fortschr Röntgenstr

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“…Radiography and CT are utilized to show the bone defect, MRI is used to show the sac, its content and the concomitant cerebral abnormalities. It might be observed together with some cerebral pathology such as cortical dysplasia, venous sinus abnormalities, corpus callosum abnormalities, Dandy-Walker and Chiarimal formation 4,12 . Four of our 2 cases were at the OB, 2 were at the PB.…”

Section: Resultsmentioning

confidence: 99%

“…To make the diagnosis of benign lesion is important during the preoperative period. Simple craniectomy is sufficient for the benign calvarial lesions 2,4 . ECs and DCs which are congenital CBOL are not real tumoral lesions, but known as congenital inclusion cysts of ectodermal origin.…”

Section: Resultsmentioning

confidence: 99%

Radiological Approach to Osteolytic Benign Calvarial Lesions

Yanmaz¹,

Bayaroğulları²

2017

Kafkas J Med Sci

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“…A IRM normalmente não é utilizada para observação das estruturas ósseas do crânio uma vez que a tomografia computadorizada é considerada o padrão-ouro para esse fim, bem como a tomografia computadorizada de feixe cônico, para a região dentomaxilofacial (Roza et al 2009), porém notou-se nas imagens produzidas que ela foi eficiente em demonstrar a região da medula óssea e, portanto, concordamos com Amaral et al (2003) na indicação da IRM para detectar lesões ósseas nos estágios iniciais quando restritas à medula óssea.…”

Section: Resultsunclassified

“…O contraste nas imagens se baseia na diferença de intensidade do sinal em áreas de estruturas ou de composição diferentes. A capacidade de obtenção de imagens multiplanares e a ausência de radiação ionizante tornaram a ressonância magnética a técnica de geração de imagens mais adequada para muitas doenças, em especial as do sistema nervoso central (SNC) por causa do seu abundante conteúdo hídrico, portanto, rico em prótons de hidrogênio, responsáveis pelo sinal gerado durante a obtenção de imagens (Lufkin 1999, Hilário et al 2000, Amaral et al 2003, Mullins 2006, Hage & Iwasaki 2009.…”

Section: Introductionunclassified

Imagem por ressonância magnética na investigação da cabeça de cães

et al. 2010

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ABSTRACT.-Hage M.C.F.N.S., Iwasaki M., Rabbani S.R., Kamikawa L., Cervantes H.J.R., Bombonato P.P., Sterman F. Magnetic resonance imaging (MRI) is the most sensitive method of diagnostic imaging to evaluate soft tissues, specially the brain, however it is expensive. The method is based on the nuclear magnetic resonance phenomenon that occurs when atomic nucleus with magnetic proprieties in the body are submitted to a strong magnetic field, and excited with radio frequency generating a radio frequency signal captured by a receptive antenna. The signal is processed by Fourier Transform for the image formation. This study had the objective to obtain 10 complete exams of heads in cadavers of normal dogs to MRI and to make an Atlas of head structures. The images were obtained with a magnetic resonance unit Gyroscan S15/HP Philips using a magnetic field of 1,5Tesla. The cadavers were positioned with the head into a human head coil and submitted to sagittal slices used to plan transverse and dorsal slices in T1, T2 and DP spin-echo sequences. In T1 we adjusted TR=400ms and TE=30ms, in T2 TR=2000ms and TE=80ms and in DP TR=2000ms and TE=30ms. The slice thickness was 4mm, the number of averages 2, the matrix 256x256, the factor 1,0 and the field of view 14cm. The duration of the complete exam of the head was 74,5minutes. The images obtained with the described sequences and with the human head coil was of good quality. In T1 fat was hyperintense and fluid was hypointense. In T2 fat was less hyperintense and fluid was hyperintense. The cortical bone and the air were hypointense in all sequences used because of the low proton density. The DP sequence showed the best contrast between white and gray matter when compared with T2 and T1 sequences. Distinction of cerebral sulcus and gyrus was possible because T2 showed the cerebrospinal fluid. The identification of bone structures that compound the region, muscles, main venous and arterial vessels and structures of the central nervous system, besides elements of the digestory and respiratory systems and structures of the eyes among others was possible through contrast obtained with MRI. In this study the MRI acquired in T1, DP and T2 were complementary for the anatomic study of the head and been able to demonstrate the structures of the canine head with rich anatomic details. The time used to 1 Recebido em 29 de novembro de 2009. Aceito para publicação em 24 de fevereiro de 2010.

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MR imaging for evaluation of lesions of the cranial vault: a pictorial essay

Cited by 51 publications

References 6 publications

Cross Sectional Imaging of Solitary Lesions of the Neurocranium

Cross Sectional Imaging of Solitary Lesions of the Neurocranium

Radiological Approach to Osteolytic Benign Calvarial Lesions

Imagem por ressonância magnética na investigação da cabeça de cães

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