title: [Clinical utility of attenuation correction with X-rays in myocardial perfusion SPECT studies].
abstract: 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.
authors.affiliation: Servicio de Medicina Nuclear. Hospital Universitario de Bellvitge-IDIBELL. Barcelona. España. mtbajen@csub.scs.es
authors.forename: M T
authors.initials: MT
authors.lastname: Bajén
authors.forename: Y
authors.initials: Y
authors.lastname: Ricart
authors.forename: A
authors.initials: A
authors.lastname: Rodríguez-Gasén
authors.forename: J
authors.initials: J
authors.lastname: Mora
authors.forename: M E
authors.initials: ME
authors.lastname: Quintana
authors.forename: A
authors.initials: A
authors.lastname: Benítez
authors.forename: A
authors.initials: A
authors.lastname: Domènech
authors.forename: A
authors.initials: A
authors.lastname: Ruiz-Mayoral
authors.forename: R
authors.initials: R
authors.lastname: Puchal
authors.forename: C
authors.initials: C
authors.lastname: Pallarés
authors.forename: J
authors.initials: J
authors.lastname: Martín-Comín
mesh_terms: 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