Clinical usefulness of two-dimensional reformatted and three-dimensionally rendered computerized tomographic images

Alder, Marden E.; Deahl, S. Thomas; Matteson, Stephen R.

doi:10.1016/0278-2391(95)90707-6

Cited by 85 publications

(43 citation statements)

References 32 publications

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“…The extent of comminuted fractures is better demonstrated on the 3D-CT, where the size, shape, and displacement of individual fragments are clearly revealed. [25][26][27][28] The combination of multislice CT and 3D volume rendering technique allowed several improvements in imaging interpretation. Absence of free paranasal sinus fluid (clear sinus sign) in facial CT is a highly reliable criterion for excluding fractures involving the paranasal sinus walls.…”

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confidence: 99%

Computed Tomography evaluation of maxillofacial injuries

Prasad

Khanal

2017

J Coll Med Sci-Nepal

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Background & Objectives:The maxillofacial r egion, a complex anatomical structure, can be evaluated by conventional (plain) films, Tomography, Multidetector Computed Tomography, Three-Dimensional Computed Tomography, Orthopantomogram and Magnetic Resonance Imaging. The study was conducted with objective of describing various forms of maxillofacial injuries, imaging features of different types of maxillofacial fractures and the advantage of using Three-Dimensional Computed Tomography reconstructed image. Materials & Methods: A hospital based cross-sectional study was conducted among 50 patients during April 2014 to September 2016 using Toshiba Aquilion Prime 160 slice Multi Detector Computed Tomography scanner. Results: The maxillofacial fractures were significantly higher in male population (88%) than female population (12 %). Road traffic accidents were the most common cause of injury others being physical assault and fall from height. It was most common in 31-40 years (26%) and 21-30 (24%) years age group. Maxillary sinus was the commonest fracture (36%) followed by nasal bone and zygomatic bone (30%), mandible and orbital bones (28%). Soft tissue swelling was the commonest associated finding. Three dimensional images (3 D) compared to the axial scans missed some fractures. However, the extension of the complex fracture lines and degree of displacement were more accurately assessed. Complex fractures found were Le fort (6%) and naso-orbito-ethmoid (4%) fractures. Conclusion: The proper evaluation of complex anatomy of the facial bones requires Multidetector Computed Tomography which offers excellent spatial resolution enabling multiplanar reformations and three dimensional reconstructions for enhanced diagnostic accuracy and surgical planning.

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confidence: 99%

Computed Tomography evaluation of maxillofacial injuries

Prasad

Khanal

2017

J Coll Med Sci-Nepal

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“…The diagnosis and treatment planning of abnormalities in the craniofacial complex are limited when only standard radiography is used, due to lack of dimensional accuracy, image distortion, and the presence of superimposed structures 1,11 . However, currently, three-dimensional computed tomography has improved diagnostic performance 5,6,16,17 .…”

Section: Discussionmentioning

confidence: 99%

CT interpretation of craniofacial anomalies: a comparative analysis by undergraduate dental students

et al. 2005

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ABSTRACT:The aim of this study was to evaluate the accuracy and reproducibility of computed tomography (CT) image interpretation made in axial slices (2D-CT) and 3D reconstructed images (3D-CT) of patients with craniofacial anomalies. The analyses were made by undergraduate dental students, and compared with the diagnoses considered upon surgical intervention. Computed tomography of 43 patients were analyzed independently by three calibrated examiners (undergraduate students) with, respectively, one, two, and three semesters of experience in craniofacial CT training and interpretation. The analysis of 2D-CT and 3D-CT images were performed at distinct times using an independent workstation associated with a specific computer graphics software for volumetric images. The analysis of inter-examiner agreement and of the agreement between observers and the gold standard was performed using the Kappa test. The accuracy evaluation presented a progressively higher value for examiners with progressively broader experience in 2D-CT and 3D-CT image interpretation. 3D-CT analyses allowed a higher interexaminer agreement (1 -0.896) than 2D-CT analyses (1 -0.614). 3D-CT was considered more precise and accurate than 2D-CT for all students' evaluations. The reproducibility and accuracy varied according to the experience in CT interpretation, and the most experienced student achieved results closer to the gold standard. DESCRIPTORS: Tomography; Face; Craniosynostosis; Craniofacial abnormalities. RESUMO:O propósito desta pesquisa foi avaliar a habilidade de alunos de graduação na análise de pacientes portadores de anomalias craniofaciais usando imagens de tomografia computadorizada (TC) em cortes axiais (2D-TC) e em terceira dimensão (3D-TC). A análise foi realizada por alunos de graduação em Odontologia, em comparação com o diagnóstico efetuado no ato operatório. Tomografias computadorizadas de 43 pacientes foram analisadas, independentemente, por três alunos de graduação previamente calibrados, com respectivamente um, dois e três semestres de tempo de experiência em interpretação de TC. As análises das imagens em 2D-TC e em 3D-TC foram obtidas em tempos e ocasiões distintos por meio de uma estação de trabalho independente utilizando-se um programa específico para imagens volumétricas. Para análise de concordância entre os observadores e destes com o diagnóstico definitivo foi utilizado o teste estatístico Kappa. Os valores de acurácia foram maiores quanto maior o tempo de experiência em interpretar imagens em 2D-TC e em 3D-TC. As análises em 3D-TC apresentaram indicadores mais elevados de concordância entre os examinadores (1 -0,896) que as análises em 2D-TC (1 -0,614). A 3D-TC foi considerada mais precisa e acurada em relação à 2D-TC na avaliação dos três alunos. A concordância entre os examinadores e entre estes e o diagnóstico variou de acordo com o tempo de treinamento em TC, sendo o aluno mais experiente aquele que obteve resultados mais próximos ao diagnóstico.

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“…The development of computer graphic programs has facilitated the interactive visualization and the qualitative and quantitative analyses necessary for craniofacial surgical planning 1,3,7,8,14,15 . These advances allowed more detailed bone structure analysis, improving imaging interpretation in comparison with conventional radiographs 6,11,25 .…”

Section: Discussionmentioning

confidence: 99%

CT-based analysis of malignant tumor volume and localization: a preliminary study

Cavalcanti

Santos²,

Perrella

et al. 2004

Braz. oral res.

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ABSTRACT:The purpose of this study was to correlate 3D-CT (3D computed tomography) volume measurements of malignant tumors with the response to treatment, and to observe bone invasion in these lesions applying a specific imaging protocol. We analyzed 17 individuals with maxillofacial malignant lesions who were submitted to spiral CT (2D-CT). The original data were transferred to an independent workstation using a 3D volume rendering package software, which was used by two examiners to obtain area and volume measurements of the lesions, independently, three times each, prior to and after treatment. The segmentation protocol was applied for the assessment of bone involvement. The difference between imaging and gold standard values was not considered significant (p > 0.05). Regarding bone invasion, three false-negatives were obtained using MPR-CT (multiplanar reconstruction) and no false-negatives were obtained using the 3D segmentation protocol. The use of 3D-CT may be a differential and important factor for expanding options regarding the localization, dimension, and clarification of lesion components. DESCRIPTORS: Tomography; Wounds and injuries; Image processing, computer-assisted; Face; Neoplasms. RESUMO:O propósito desta pesquisa foi correlacionar medidas volumétricas de lesões malignas em reconstruções tridimensionais (TC-3D) com a resposta ao tratamento e verificar o grau de envolvimento ósseo dessas lesões, aplicando-se protocolos de imagem específicos associados à computação gráfica. Foram estudados 17 indivíduos portadores de lesões malignas maxilofaciais que haviam sido submetidos à tomografia computadorizada espiral (TC-2D). Os dados originais foram transferidos para uma estação de trabalho independente, utilizando um programa para imagens volumétricas, com o qual dois observadores obtiveram medidas de área e volume das lesões, independentemente, 3 vezes cada um, no pré e pós-tratamento. O protocolo de segmentação foi aplicado para avaliação do comprometimento ósseo. A diferença entre os valores obtidos na análise da TC e no padrão ouro não foi considerada significante (p > 0,05). Considerando o envolvimento ósseo, obtiveram-se três falsos-negativos em análise das reconstruções multiplanares (TC-RMP) e nenhum falso-negativo em análise da TC-3D por meio do protocolo de segmentação. A utilização de recursos como reconstrução em TC-3D pode ser um fator diferencial e de grande valia para aumentar opções quanto a localização, dimensões e esclarecimento de componentes de diversas lesões.

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Clinical usefulness of two-dimensional reformatted and three-dimensionally rendered computerized tomographic images

Cited by 85 publications

References 32 publications

Computed Tomography evaluation of maxillofacial injuries

Computed Tomography evaluation of maxillofacial injuries

CT interpretation of craniofacial anomalies: a comparative analysis by undergraduate dental students

CT-based analysis of malignant tumor volume and localization: a preliminary study

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