Two‐dimensional real‐time imaging system for subtraction angiography using an iodine filter

A new type of subtraction imaging system was developed using an iodine filter and a single‐energy broad bandwidth monochromatized x ray. The x‐ray images of coronary arteries made after intravenous injection of a contrast agent are enhanced by an energy‐subtraction technique. Filter chopping of the...

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Bibliographic Details
Published in:Review of Scientific Instruments 1992-01, Vol.63 (1), p.629-631
Main Authors: Umetani, Keiji, Ueda, Ken, Takeda, Tohoru, Anno, Izumi, Itai, Yuji, Akisada, Masayoshi, Nakajima, Teiichi
Format: Article
Language:English
Subjects:
430303 - Particle Accelerators- Experimental Facilities & Equipment
550602 - Medicine- External Radiation in Diagnostics- (1980-)
BIOMEDICAL RADIOGRAPHY
BLOOD VESSELS
BODY
BREMSSTRAHLUNG
CARDIOVASCULAR SYSTEM
DIAGNOSTIC TECHNIQUES
ELECTROMAGNETIC RADIATION
Electromagnetism
electron and ion optics
Exact sciences and technology
FILTERS
Fundamental areas of phenomenology (including applications)
IMAGE PROCESSING
IONIZING RADIATIONS
KEK PHOTON FACTORY
MEDICINE
NUCLEAR MEDICINE
ORGANS
PARTICLE ACCELERATORS
Physics
PROCESSING
Radiation by moving charges
RADIATION SOURCES
RADIATIONS
RADIOLOGY
RADIOLOGY AND NUCLEAR MEDICINE
REAL TIME SYSTEMS
SYNCHROTRON RADIATION
SYNCHROTRON RADIATION SOURCES
X RADIATION
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Description
Summary:A new type of subtraction imaging system was developed using an iodine filter and a single‐energy broad bandwidth monochromatized x ray. The x‐ray images of coronary arteries made after intravenous injection of a contrast agent are enhanced by an energy‐subtraction technique. Filter chopping of the x‐ray beam switches energies rapidly, so that a nearly simultaneous pair of filtered and nonfiltered images can be made. By using a high‐speed video camera, a pair of two 512 × 512 pixel images can be obtained within 9 ms. Three hundred eighty‐four images (raw data) are stored in a 144‐Mbyte frame memory. After phantom studies, in vivo subtracted images of coronary arteries in dogs were obtained at a rate of 15 images/s.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.1142673