The effect of a television digital noise reduction device on fluoroscopic image quality and dose rate

Journal Article · Wed Sep 01 00:00:00 EDT 1982 · Radiology; (United States)

DOI:https://doi.org/10.1148/radiology.144.4.7111727· OSTI ID:6655828

Jaffe, C C; Orphanoudakis, S C; Ablow, R C

In coventional fluoroscopy, the current, and therefore, the dose rate, is usually determined by the level at which the radiologist visualizes a just tolerable amount of photon ''mottle'' on the video monitor. In this study, digital processing of the analogue video image reduced noise and generated a television image at half the usual exposure rate. The technique uses frame delay to compare an incoming frame with the preceding output frame. A first-order recursive filter implemented under a motion-detection scheme operates on the image on a point-by-point basis. This effective motion detection algorithm permits noise suppression without creating noticeable lag in moving structures. Eight radiologists evaluated images of vesico-ureteral reflux in the pig for noise, contrast, resolution, and general image quality on a five-point preferential scale. They rated the digitally processed fluoroscopic images equivalent in diagnostic value to unprocessed images.

• Research Organization: Yale Univ., New Haven, CT
• OSTI ID: 6655828
• Journal Information: Radiology; (United States), Journal Name: Radiology; (United States) Vol. 144:4; ISSN RADLA
• Country of Publication: United States
• Language: English

Related Subjects

550602* -- Medicine-- External Radiation in Diagnostics-- (1980-)
62 RADIOLOGY AND NUCLEAR MEDICINE
ANALOG-TO-DIGITAL CONVERTERS
ANIMALS
BIOMEDICAL RADIOGRAPHY
DIAGNOSTIC TECHNIQUES
DOMESTIC ANIMALS
DOSE RATES
DOSES
ELECTRONIC EQUIPMENT
EQUIPMENT
FLUOROSCOPY
IMAGE PROCESSING
MAMMALS
MEDICINE
NUCLEAR MEDICINE
PROCESSING
RADIATION DOSES
RADIOLOGY
SWINE
TELEVISION
VERTEBRATES