A Hybrid Emission CT - HEADTOME II

Author

Hirose, Y. ; Ikeda, Y. ; Higashi, Y. ; Koga, K. ; Hattori, H. ; Kanno, I. ; Miura, Y. ; Miura, S. ; Uemura, K.

Author_Institution

R/D Engineering Department, Medical Systems Division, Shimadzu Corporation, Kyoto, Japan

Volume

29

Issue

1

fYear

1982

Firstpage

520

Lastpage

523

Abstract

HEADTOME II for a hybrid emission computed tomography for brain has been developed. The system includes multislice capability of both positron emission tomography (PET) and single photon emission tomography (SET) in one system. It consists of three detector rings of 42cm in diameter on which 64 NaI crystals are arranged per ring, 192 as a total. Four kinds of collimators are prepared: high resolution (HR) collimator and high sensitivity (HS) collimator for both SET and PET. The tangential spatial resolution is 6.5mm-11mm for SET with the HR collimator and 10.5mm-20mm with the HS collimator measured with 99mTc line source. System sensitivity with the single photon HS collimator is 58.5 kcps/Â¿Ci/ml for a 20cm diameter uniform solution of 99mTc. System sensitivity with the positron HS collimator is 25 kcps/Â¿Ci/ml for 68Ga solution.

Keywords

Apertures; Computed tomography; Crystals; Detectors; Electrical capacitance tomography; Optical collimators; Positron emission tomography; Prototypes; Single photon emission computed tomography; Spatial resolution;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/TNS.1982.4335899

Filename

4335899