[Clinical utility of attenuation correction with X-rays in myocardial perfusion SPECT studies].
OBJECTIVE
We have compared the uncorrected images of SPECT myocardial perfusion plus gated data with corrected images with X-rays in the management of coronary artery disease.


METHODS
In 60 patients (p) a stress/rest-gated myocardial perfusion SPECT was performed with attenuation correction with a hybrid gammacamera. All patients underwent cardiac catheterization. 3 types of images were qualitatively evaluated: uncorrected stress/rest (NC), uncorrected stress/rest plus gated (NCG) and stress/rest corrected for attenuation with scatter correction (AC). McNemar's test was used to analyze the statistical differences in assessing the diagnostic accuracy of each type of images; p < 0.05 was considered statistically significant.


RESULTS
Fourteen p did not have significant lesions in the coronary arteries (NSL), 46 p showed lesions in coronary arteries: 29 in anterior descending, 26 in right coronary and 18 in circumflex. In right coronary territory, diagnostic accuracy was significantly higher on AC than on NC images (p < 0.001) and on AC than on NCG images (p < 0.01). In NSL group there are significant differences between NC and AC (p < 0.02) and between NCG and AC (p < 0.05).


CONCLUSIONS
Attenuation correction with X-rays significantly improves diagnostic accuracy of uncorrected images and uncorrected images plus gated.
Bajén
M T
MT
Servicio de Medicina Nuclear. Hospital Universitario de Bellvitge-IDIBELL. Barcelona. España. mtbajen@csub.scs.es
Ricart
Y
Y
Rodríguez-Gasén
A
A
Mora
J
J
Quintana
M E
ME
Benítez
A
A
Domènech
A
A
Ruiz-Mayoral
A
A
Puchal
R
R
Pallarés
C
C
Martín-Comín
J
J
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003324:Coronary Artery Disease / Q000000981:diagnostic imaging*; D005080:Exercise Test; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012680:Sensitivity and Specificity; D015899:Tomography, Emission-Computed, Single-Photon; D014057:Tomography, X-Ray Computed