Paradoxical motion of the hemidiaphragm in patients with emphysema.
J Thorac Imaging
; 15(3): 191-5, 2000 Jul.
Article
en En
| MEDLINE
| ID: mdl-10928612
ABSTRACT
The authors evaluate paradoxical diaphragmatic motion using magnetic resonance (MR) imaging in patients with emphysema. The subjects were 12 healthy volunteers and 10 male patients with moderate to severe air flow obstruction. With subjects in the supine position, 30 sequential sagittal images of the bilateral lungs were obtained during quiet and forced breathing using a 1.5T MR unit with a body coil. The sequence was single shot fast spin echo (SSFSE) with half Fourier transformation. Subtraction images were made from the original images (by subtracting a given image from the preceding image), which visualized the chest wall motion as white or black bands on the edge of the lung fields. The authors evaluated both the original and subtraction images. MR imaging showed abnormal hemidiaphragmatic motion during forced breathing the ventral portion of the hemidiaphragm moved downward while the dorsal part moved upward like a seesaw in 6 patients. MR images also revealed abnormal ribcage motion; the ventral ribcage moved anteriorly when the hemidiaphragm moved upward in 7 patients. No abnormal motion was observed in healthy volunteers. MR is a noninvasive and useful tool for evaluating the asynchronous respiratory motion in patients with emphysema.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Enfisema Pulmonar
/
Diafragma
/
Imagen por Resonancia Magnética
Tipo de estudio:
Observational_studies
Límite:
Adult
/
Aged
/
Aged80
/
Female
/
Humans
/
Male
Idioma:
En
Revista:
J Thorac Imaging
Asunto de la revista:
DIAGNOSTICO POR IMAGEM
Año:
2000
Tipo del documento:
Article
País de afiliación:
Japón