Nuclear magnetic resonance (NMR) blood flow imaging

Conference · Sun Jan 01 04:00:00 EST 1984 · J. Nucl. Med.; (United States)

OSTI ID:6546895

Price, R R; Patton, J A; Kulkarni, M D; Pickens, D R; Erickson, J J; Stephens, W H; Partain, C L; James, Jr, A E

Picture element values in NMR images are dependent not only upon T/sub 1/ and T/sub 2/ relaxation times but also on the local density and velocity of hydrogen nuclei moving through the region being imaged. In 1959 the potential of non-imaging NMR for measuring blood flow was demonstrated. Recently several investigators have proposed methods for combining NMR imaging with NMR blood flow measurements. The authors have investigated the relationships between various radiofrequency pulse sequences and flow rate and their effects on image intensity using a constant flow pump and a 0.5 Tesla Technicare Teslacon NMR imager. Dilute mixtures of ethylene glycol were used to simulate blood. Flow measurements were made in Tygon Tubing (12 mm) at variable velocities ranging from 0-35 cm/sec. The flow phantom was used to calibrate several pulse sequences relating image intensity and vascular flow velocity. Representative patient studies demonstrating blood-flow have been performed. The calibration is being extended to pulsatile flow systems.

• Research Organization: Vanderbilt Univ. School of Medicine, Nashville, TN
• OSTI ID: 6546895
• Report Number(s): CONF-840619-
• Conference Information: Journal Name: J. Nucl. Med.; (United States) Journal Volume: 25:5
• Country of Publication: United States
• Language: English

Related Subjects

550602* -- Medicine-- External Radiation in Diagnostics-- (1980-)
62 RADIOLOGY AND NUCLEAR MEDICINE
ACCURACY
BLOOD FLOW
CALIBRATION
CARDIOVASCULAR SYSTEM
DIAGNOSTIC TECHNIQUES
DYNAMIC FUNCTION STUDIES
ELECTROMAGNETIC RADIATION
ELEMENTS
HYDROGEN
IMAGE PROCESSING
IMAGES
MONITORING
NMR IMAGING
NONMETALS
PERFORMANCE
PROCESSING
PULSE TECHNIQUES
RADIATIONS
RADIOWAVE RADIATION
RELAXATION TIME
RESOLUTION
RF SYSTEMS
SENSITIVITY