NORMAL SPECT TL-201 BULL-EYE DISPLAY - GENDER DIFFERENCES

  • 1 December 1988
    • journal article
    • research article
    • Vol. 29  (12) , 1901-1909
Abstract
The bull''s-eye technique synthesizes three-dimensional information from single photon emission computed tomographic 201Tl images into two dimensions so that a patient''s data can be compared quantitatively against a normal file. To characterize the normal database and to clarify differences between males and females, clinical data and exercise electrocardiography were used to identify 50 males and 50 females with < 5% probability of coronary artery disease. Results show inhomogeneity of the 201Tl distributions at stress and delay: septal to alteral wall count ratios are < 1.0 in both females and males; anterior to inferior wall count ratios are > 1.0 in males but are approximately equal to 1.0 in females. Washout rate is faster in females than males at the same peak exercise heart rate and systolic blood pressure, despite lower exercise time. These important differences suggest that quantitative analysis of single photon emission computed tomographic 201Tl images requires gender-matched normal files.