Author/Authors :
Giacomini، نويسنده , , J.C. and Gordon، نويسنده , , H and OʹNeil، نويسنده , , R and Van Kessel، نويسنده , , A and Cason، نويسنده , , B and Chapman، نويسنده , , D and Lavendar، نويسنده , , W and Gmur، نويسنده , , N and Menk، نويسنده , , R and Thomlinson، نويسنده , , W and Zhong، نويسنده , , Z and Rubenstein، نويسنده , , E، نويسنده ,
Abstract :
This report describes the initial use of K-edge xenon dichromography for imaging the bronchial tree in humans. The subjects inhale an anatomic dead-space volume of a mixture of 80% xenon and 20% oxygen, following which a dichromographic line-scan image is recorded using two monochromatic synchrotron radiation beams closely bracketing the k-edge of xenon (34.56 keV). Images of airways, from main-stem bronchi to fourth-order branches, are recorded with a pixel resolution of 0.5×0.5 mm. The scanning rate is 12 cm/s, the line exposure time is 4 ms, the skin dose to the exposed area (125 mm × 150 mm) is <0.35 rad.
