An adaptive gating approach for x-ray dose reduction during cardiac interventional procedures

Journal Article · Tue Mar 01 00:00:00 EST 1994 · IEEE Transactions on Medical Imaging (Institute of Electrical and Electronics Engineers); (United States)

DOI:https://doi.org/10.1109/42.276140· OSTI ID:7144459

Abdel-Malek, A; Yassa, F; Bloomer, J ^[1]

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1. GE Corporate Research and Development, Schenectady, NY (United States)

The increasing number of cardiac interventional procedures has resulted in a tremendous increase in the absorbed x-ray dose by radiologists as well as patients. A new method is presented for x-ray dose reduction which utilizes adaptive tube pulse-rate scheduling in pulsed fluoroscopic systems. In the proposed system, pulse-rate scheduling depends on the heart muscle activity phase determined through continuous guided segmentation of the patient's electrocardiogram (ECG). Displaying images generated at the proposed adaptive nonuniform rate is visually unacceptable; therefore, a frame-filling approach is devised to ensure a 30 frame/sec display rate. The authors adopted two approaches for the frame-filling portion of the system depending on the imaging mode used in the procedure. During cine-mode imaging (high x-ray dose), collected image frame-to-frame pixel motion is estimated using a pel-recursive algorithm followed by motion-based pixel interpolation to estimate the frames necessary to increase the rate to 30 frames/sec. The other frame-filling approach is adopted during fluoro-mode imaging (low x-ray dose), characterized by low signal-to-noise ratio images. This approach consists of simply holding the last collected frame for as many frames as necessary to maintain the real-time display rate.

• OSTI ID: 7144459
• Journal Information: IEEE Transactions on Medical Imaging (Institute of Electrical and Electronics Engineers); (United States), Vol. 13:1; ISSN 0278-0062
• Country of Publication: United States
• Language: English

Related Subjects

62 RADIOLOGY AND NUCLEAR MEDICINE
61 RADIATION PROTECTION AND DOSIMETRY
HEART
BIOMEDICAL RADIOGRAPHY
PATIENTS
RADIATION DOSES
RADIOLOGICAL PERSONNEL
X-RAY EQUIPMENT
PERFORMANCE
ANIMALS
BODY
CARDIOVASCULAR SYSTEM
DIAGNOSTIC TECHNIQUES
DOSES
EQUIPMENT
MAMMALS
MAN
MEDICAL PERSONNEL
MEDICINE
NUCLEAR MEDICINE
ORGANS
PERSONNEL
PRIMATES
RADIOLOGY
VERTEBRATES
550602* - Medicine- External Radiation in Diagnostics- (1980-)
560101 - Biomedical Sciences
Applied Studies- Radiation Effects- Dosimetry & Monitoring- (1992-)