To study the value of F-FDG coincidence imaging in diagnosis of cancer

101 patients who were suspi- 18 cious of cancer were F-FDG coincidence imaged before operation. Diagnoses of visual and semi-quantitative analy- 18 sis were compared with the pathologic results after operation. The sensitivity and speciality of F-FDG coincidence 18 imaging were 84.61% and 78.26% in detecting cancer

while accuracy was 83.1%. For patients with a cancer of less than 2 cm

the sensitivity and speciality were 80% and 100%

accuracy was 82.35%. When standard of diagno- sis was higher than 2.0 in T / N value

the sensitivity and speciality were 85.90% and 82.61%

while accuracy was 85.15%; when visual analysis was combined with semi-quantitative analysis

the sensitivity and speciality were 88.5 % and 87.0%

while accuracy was 88.11%. In conclusion

it is of higher value to diagnose cancers with F-FDG 18 coincidence imaging

and the accuracy of diagnosis can be improved by visual analysis combined with semi-quantitative analysis.