[Evaluation of regional pulmonary 133Xe-gas washout with dynamic SPECT imaging obtained by a triple-headed SPECT system with continuous repetitive rotating acquisition mode].
The clinical potential of the dynamic SPECT in studying pulmonary washout of Xenon-133 (133Xe), using a triple-headed SPECT system (Toshiba GCA 9300A/HG, Japan) with continuous repetitive rotating acquisition mode, was preliminarily investigated in 6 healthy volunteers and 23 patients with various lung diseases. The equilibrium image was initially acquired for 1 min after breathing 133Xe gas (370 MBq) in a closed circuit for 6 min, and subsequently serial 133Xe-washout SPECT images were continuously acquired every 60 sec for 5-6 min. As the ventilation index, the real half time of regional activity was evaluated. The SPECT study demonstrated the gravity-induced gradient on ventilation in the normal subjects. In the various lung diseases, it allowed us to demonstrate visually and quantitatively the dynamic process and three-dimensional distribution of ventilation abnormalities, with or without chest radiographic abnormalities. These results indicate clinical potential of pulmonary dynamic SPECT of 133Xe-washout for elucidating the distribution and nature of ventilation abnormalities in various lung diseases.
Suga
K
K
Department of Radiology, Yamaguchi University School of Medicine.
Nishigauchi
K
K
Kume
N
N
Takano
K
K
Koike
S
S
Matsumoto
T
T
Matsunaga
N
N
D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D008168:Lung / Q000000981:diagnostic imaging*; D008171:Lung Diseases / Q000000981:diagnostic imaging; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D012399:Rotation; D015899:Tomography, Emission-Computed, Single-Photon / Q000379:methods; D014980:Xenon Radioisotopes
D014980:Xenon Radioisotopes