Three-dimensional imaging of the inner ear by volume-rendered reconstructions of magnetic resonance data.
Arch Otolaryngol Head Neck Surg
; 128(5): 549-53, 2002 May.
Article
en En
| MEDLINE
| ID: mdl-12003586
ABSTRACT
OBJECTIVE:
To evaluate 3-dimensional inner ear visualization by volume rendering of high-resolution magnetic resonance data in patients with clinically suspected inner ear abnormality.DESIGN:
Prospective comparative study of different postprocessing techniques, based on blinded film readings.SETTING:
Tertiary referral hospital.SUBJECTS:
Fifty patients (17 females and 33 males) aged 1 to 77 years (average age, 42 years) with sensorineural hearing loss, vertigo, and/or tinnitus. INTERVENTION Postprocessing of magnetic resonance data to inner ear reconstructions by the use of volume rendering as well as maximum-intensity projection; caloric testing by electronystagmography. MAIN OUTCOMEMEASURES:
Film was read blindly by 4 radiologists using a 5-point parameter scale for image quality and diagnostic value. The assessibility of inner ear subsegments was evaluated. The specificity of volume-rendered reconstructions for detecting semicircular canal obliterations was assessed in a subgroup of 9 patients by caloric testing. The time required for data postprocessing as well as film reading was recorded by means of a stopwatch.RESULTS:
Volume-rendered inner ear reconstructions were superior in image quality (P<.001), diagnostic value (P<.001), subsegment inner ear assessment (P<.01 to P<.001), and film reading time (P<.001) compared with maximum-intensity projections. The data postprocessing time was comparable for both techniques. Caloric weakness was noted in all patients assessed by electronystagmography.CONCLUSION:
Volume rendering is the postprocessing technique of choice for 3-dimensional inner ear visualization, performing better than maximum-intensity projections with respect to various parameters.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Pruebas de Función Vestibular
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Procesamiento de Imagen Asistido por Computador
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Imagen por Resonancia Magnética
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Pérdida Auditiva Sensorineural
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Enfermedades del Laberinto
Tipo de estudio:
Diagnostic_studies
Límite:
Adolescent
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Adult
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Aged
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Child
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Child, preschool
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Female
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Humans
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Infant
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Male
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Middle aged
Idioma:
En
Revista:
Arch Otolaryngol Head Neck Surg
Asunto de la revista:
OTORRINOLARINGOLOGIA
Año:
2002
Tipo del documento:
Article
País de afiliación:
Alemania
Pais de publicación:
EEUU
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ESTADOS UNIDOS
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ESTADOS UNIDOS DA AMERICA
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EUA
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UNITED STATES
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UNITED STATES OF AMERICA
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US
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USA