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The basic imaging properties of a large (57 cm) image intensifier (I.I.)-TV digital imaging system were examined to determine the effects of various physical parameters on the quality of the digital chest images obtained, and also to explore the clinical usefulness of the system. The characteristic curve of the digital system, which relates the output pixel value to the input relative x-ray intensity, was measured with an aluminum stepwedge. MTFs were determined using slit images, and the veiling-glare fraction was measured with a lead-disk technique. Noise Wiener spectra were obtained from uniformly exposed images. The current limitations of the large II-TV digital chest system are its low spatial resolution, and the presence of large amounts of veiling glare and structure mottle. Advantages of this system over other digital chest imaging systems include the high speed of image data acquisition and the capability of "real-time" dynamic imaging of the chest at a radiation dose comparable to that in conventional radiography of the chest.
H Fujita, and
K Doi, and
H MacMahon, and
Y Kume, and
M L Giger, and
K R Hoffmann, and
T Katafuchi, and
K Ohara, and
H P Chan
January 1987,
Medical physics,
H Fujita, and
K Doi, and
H MacMahon, and
Y Kume, and
M L Giger, and
K R Hoffmann, and
T Katafuchi, and
K Ohara, and
H P Chan
November 1992,
Investigative radiology,
H Fujita, and
K Doi, and
H MacMahon, and
Y Kume, and
M L Giger, and
K R Hoffmann, and
T Katafuchi, and
K Ohara, and
H P Chan
May 1994,
Computer methods and programs in biomedicine,
H Fujita, and
K Doi, and
H MacMahon, and
Y Kume, and
M L Giger, and
K R Hoffmann, and
T Katafuchi, and
K Ohara, and
H P Chan
March 1994,
Medical physics,
H Fujita, and
K Doi, and
H MacMahon, and
Y Kume, and
M L Giger, and
K R Hoffmann, and
T Katafuchi, and
K Ohara, and
H P Chan
January 1988,
Medical physics,
H Fujita, and
K Doi, and
H MacMahon, and
Y Kume, and
M L Giger, and
K R Hoffmann, and
T Katafuchi, and
K Ohara, and
H P Chan
October 1996,
Academic radiology,
H Fujita, and
K Doi, and
H MacMahon, and
Y Kume, and
M L Giger, and
K R Hoffmann, and
T Katafuchi, and
K Ohara, and
H P Chan
January 1991,
European journal of radiology,
H Fujita, and
K Doi, and
H MacMahon, and
Y Kume, and
M L Giger, and
K R Hoffmann, and
T Katafuchi, and
K Ohara, and
H P Chan
December 1967,
Applied optics,
H Fujita, and
K Doi, and
H MacMahon, and
Y Kume, and
M L Giger, and
K R Hoffmann, and
T Katafuchi, and
K Ohara, and
H P Chan
January 1989,
RoFo : Fortschritte auf dem Gebiete der Rontgenstrahlen und der Nuklearmedizin,
H Fujita, and
K Doi, and
H MacMahon, and
Y Kume, and
M L Giger, and
K R Hoffmann, and
T Katafuchi, and
K Ohara, and
H P Chan
January 1989,
Acta radiologica (Stockholm, Sweden : 1987),
