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:6708010

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

In conventional 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 of 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 vesicoureteral reflux in the pig for noise, contrast, resolution, and general image quality on a five-point preferential scale. They rated the digitally processed fluoroscopy images equivalent in diagnostic value to unprocessed images.

• Research Organization: Department of Diagnostic Radiology, Yale University School of Medicine, New Haven
• OSTI ID: 6708010
• Journal Information: Radiology; (United States), Journal Name: Radiology; (United States) Vol. 144:4; ISSN RADLA
• Country of Publication: United States
• Language: English

Related Subjects

550601 -- Medicine-- Unsealed Radionuclides in Diagnostics
560152* -- Radiation Effects on Animals-- Animals
62 RADIOLOGY AND NUCLEAR MEDICINE
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ANIMALS
BIOMEDICAL RADIOGRAPHY
DIAGNOSTIC TECHNIQUES
DOMESTIC ANIMALS
DOSES
FLUOROSCOPY
IMAGES
MAMMALS
MEDICINE
NUCLEAR MEDICINE
OPTIMIZATION
RADIATION DOSES
RADIOLOGY
SWINE
VERTEBRATES