X-ray phase imaging: Demonstration of extended conditions for homogeneous objects.
We discuss contrast formation in a propagating x-ray beam. We consider the validity conditions for linear relations based on the transport-of-intensity equation (TIE) and on contrast transfer functions (CTFs). From a single diffracted image, we recover the thickness of a homogeneous object which has substantial absorption and a phase-shift of --0.37 radian.
Turner
L
L
Dhal
B
B
Hayes
J
J
Mancuso
A
A
Nugent
K
K
Paterson
D
D
Scholten
R
R
Tran
C
C
Peele
A
A