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1.
J Am Coll Cardiol ; 35(1): 230-7, 2000 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-10636285

RESUMO

OBJECTIVES: This study investigated the feasibility, accuracy and clinical potential of creating polymer hard copies of echocardiographic data using stereolithography. BACKGROUND: Three-dimensional (3D) echocardiography has so far been limited by the need to display reconstructed 3D objects on a two-dimensional screen. Thus, tangible stereolithographic polymer models created from echocardiographic data could enhance our spatial perception of cardiac anatomy and pathology. METHODS: Hard-copy replicas of water-filled latex balloon phantoms (n = 7) and porcine liver specimens (n = 12) were generated from echocardiographic images using stereolithography (computerized laser polymerization). In addition, we created 24 models of the mitral valve from 12 transesophageal studies (normal = 6, mitral stenosis n = 4, prolapse/flail leaflet n = 8, annular dilation n = 2, leaflet restriction n = 2 and following mitral valve repair n = 2). RESULTS: Excellent agreement was found for comparison of volumes (r = 0.98, SEE = 3.46 mm3, mean difference = 0.25 +/- 3.33 mm3) and maximal dimensions (r = 0.99, SEE = 0.16 cm, mean difference = 0.03 +/- 0.16 cm) between phantoms and their corresponding replicas. Visual and tactile examination of mitral valve models by two blinded observers allowed correct depiction of mitral valve anatomy and pathology in all cases. CONCLUSIONS: Stereolithographic modeling of echocardiographic images is feasible and provides tangible polyacrylic models that are true to scale, shape and volume. Such models offer accurate depiction of mitral valve anatomy and pathology in patients studied with transesophageal echocardiography. This technique could have substantial impact on diagnosis, management and preoperative planning in complex cardiovascular disorders.


Assuntos
Ecocardiografia Transesofagiana/instrumentação , Processamento de Imagem Assistida por Computador/instrumentação , Modelos Cardiovasculares , Polímeros , Sistemas Computacionais , Doenças das Valvas Cardíacas/diagnóstico por imagem , Doenças das Valvas Cardíacas/cirurgia , Humanos , Fígado/anatomia & histologia , Fígado/diagnóstico por imagem , Fígado/patologia , Valva Mitral/diagnóstico por imagem , Valva Mitral/patologia , Imagens de Fantasmas
3.
Folia Phoniatr Logop ; 49(3-4): 201-8, 1997.
Artigo em Inglês | MEDLINE | ID: mdl-9256541

RESUMO

The authors report 1,030 (velo)pharyngoplasties performed in 40 years. The anatomical result was good in 98%, hyperrhinophony ceased or became minimal in 90% after surgery. The surgical indication and technique, the operative complications and the factors influencing the functional effect are discussed. In the present investigation cephalograms of 53 unilateral cleft lip and palate (UCLP) patients with inferiorly based pharyngeal flap were compared with the cephalograms of 38 UCLP patients without pharyngeal flap operation. Pharyngeal flap surgery has an adverse effect on the growing face both in the sagittal and vertical dimensions, but the changes do not reach a degree that would justify the abandonment of the good functional effect of velopharyngoplasty.


Assuntos
Cefalometria , Fenda Labial/cirurgia , Fissura Palatina/cirurgia , Complicações Pós-Operatórias/etiologia , Retalhos Cirúrgicos , Insuficiência Velofaríngea/cirurgia , Transtornos da Articulação/etiologia , Transtornos da Articulação/fisiopatologia , Transtornos da Articulação/cirurgia , Criança , Pré-Escolar , Fenda Labial/fisiopatologia , Fissura Palatina/fisiopatologia , Feminino , Seguimentos , Humanos , Masculino , Desenvolvimento Maxilofacial/fisiologia , Complicações Pós-Operatórias/fisiopatologia , Retalhos Cirúrgicos/fisiologia , Resultado do Tratamento , Insuficiência Velofaríngea/fisiopatologia
4.
Fogorv Sz ; 84(1): 11-4, 1991 Jan.
Artigo em Húngaro | MEDLINE | ID: mdl-1999255

RESUMO

The tele-X-ray photographs of 108 patients with single-sided cleft lips and palate were compared with 71 normal controls. The examination proved that a basic crane structure difference can be found between the groups. The group with cleft has a characteristic face with significant skeletal and dental changes. Such features have to be considered in the course of habilitation.


Assuntos
Fenda Labial , Fissura Palatina , Crânio/anatomia & histologia , Criança , Humanos
5.
Orthod Epitheor ; 2(2): 57-62, 1990 Aug.
Artigo em Grego Moderno | MEDLINE | ID: mdl-2129594

RESUMO

108 cephalograms of complete unilateral cleft lip and palate patients, divided into two groups according to ages, had been compared to 71 normal controls. The study demonstrated that there are basic differences in facial morphology between the groups. The cleft sample has a retrognathic facial configuration with significantly different skeletal sagittal and vertical trend compared to the normal. There are also compensatory dental disorders.


Assuntos
Fenda Labial/patologia , Fissura Palatina/patologia , Cefalometria , Criança , Fissura Palatina/complicações , Humanos , Desenvolvimento Maxilofacial , Retrognatismo/complicações
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