Contrast-Enhanced Magnetic Resonance Angiography: Dose the Test Dose Bolus Represent the Main Dose Bolus Accurately?
Korean Journal of Radiology
;
: 91-97, 2000.
Article
Dans Anglais
| WPRIM
| ID: wpr-138965
ABSTRACT
OBJECTIVE:
To determine whether the time-intensity curves acquired by test and main dose contrast injections for MR angiography are similar. MATERIALS ANDMETHODS:
In 11 patients, repeated contrast-enhanced 2D-turbo-FLASH scans with 1-sec interval were obtained. Both test and main dose time-intensity curves were acquired from the abdominal aorta, and the parameters of time-intensity curves for the test and main boluses were compared. The parame-ters used were arterial and venous enhancement times, arterial peak enhance-ment time, arteriovenous circulation time, enhancement duration and enhance-ment expansion ratio.RESULTS:
Between the main and test boluses, arterial and venous enhance-ment times and arteriovenous circulation time showed statistically significant correlation (p < 0.01), with correlation coefficients of 0.95, 0.92 and 0.98 respectively. Although the enhancement duration was definitely greater than infusion time, reasonable measurement of the end enhancement point in the main bolus was impossible.CONCLUSION:
Only arterial and venous enhancement times and arteriovenous circulation time of the main bolus could be predicted from the test-bolus results. The use of these reliable parameters would lead to improvements in the scan timing method for MR angiography.
Texte intégral:
Disponible
Indice:
WPRIM (Pacifique occidental)
Sujet Principal:
Aorte abdominale
/
Facteurs temps
/
Angiographie par résonance magnétique
/
Produits de contraste
/
Acide gadopentétique
Type d'étude:
Étude pronostique
Limites du sujet:
Adulte
/
Femelle
/
Humains
/
Mâle
langue:
Anglais
Texte intégral:
Korean Journal of Radiology
Année:
2000
Type:
Article
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