Measurement of lung volume with 81Krm in a dynamic scintigram.
Nucl Med Commun
; 8(7): 479-88, 1987 Jul.
Article
em En
| MEDLINE
| ID: mdl-3684105
ABSTRACT
The meaning of 81Krm counts obtained in a dynamic series of gated lung ventilation scans was evaluated in terms of flow rate, lung volume, or the flow/volume ratio. Flow and volume signals were recorded together with scintigraphic events in 29 subjects breathing 81Krm and after its decay, 127Xe as a tracer of lung volume. Gated ventilation scans and respiratory signals were reconstructed. Statistical analyses were carried out for linear regressions between total normalized counts detected by the gamma camera and (1) flow rate, (2) lung volume and (3) flow/volume ratio. Inspiration and expiration were analysed separately. For both isotopes, the best correlation was obtained between counts and lung volume (r greater than 0.93). No correlation was obtained between counts and flow rate or flow/volume ratio. Thus, we conclude that 81Krm count variations in gated scans correlate well with tidal volume.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Radioisótopos de Criptônio
/
Pulmão
Limite:
Humans
Idioma:
En
Revista:
Nucl Med Commun
Ano de publicação:
1987
Tipo de documento:
Article