[A bull's eye subtraction polar map for assessing thallium redistribution (1). Comparison with quantitative redistribution].
A new bull's eye subtraction polar (BS) map has been developed for quantitative assessment of redistribution on stress-delayed thallium-201 SPECT studies. BS map was created after subtraction of a normalized stress bull's eye polar map from a normalized delayed polar map in 10 normal subjects and 33 patients with coronary artery disease to compare BS map with qualitative redistribution scores. The BS map showed less than 15% in all of the 50 segments in the normal subjects. Of 27 segments exhibiting persistent defect without redistribution, the BS map showed less than 10% in 20 segments (74%) and 10-15% in 6 segments (22%). On the other hand, of 34 segments exhibiting redistribution, the BS map showed greater than or equal to 15% in 25 segments (74%) and 10-15% in the remaining 9 segments (26%). Thus, significant redistribution was evident in the areas showing greater than or equal to 10-15% on the BS map. We conclude that the BS map is valuable for quantitative assessment of redistribution on stress-delayed thallium-201 SPECT imaging.
Shindo
M
M
Department of Radiology and Nuclear Medicine, Kyoto University Faculty of Medicine.
Tamaki
N
N
Takahashi
N
N
Ohtani
H
H
Yonekura
Y
Y
Konishi
J
J
Nohara
R
R
Kambara
H
H
Kawai
C
C
Yoshioka
K
K
D000328:Adult; D000368:Aged; D003327:Coronary Disease / Q000000981:diagnostic imaging; D005260:Female; D006321:Heart / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D008875:Middle Aged; D005082:Physical Exertion; D013382:Subtraction Technique; D013794:Thallium Radioisotopes; D015899:Tomography, Emission-Computed, Single-Photon
D013794:Thallium Radioisotopes