Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Optimal ECG trigger point in electron-beam CT studies: Three methods for minimizing motion artifacts
Autore:
Mao, SS; Budoff, MJ; Bin, L; Liu, SCK;
Indirizzi:
Univ Calif Los Angeles, Harbor Res & Educ Inst, Torrance, CA 90502 USA Univ Calif Los Angeles Torrance CA USA 90502 Inst, Torrance, CA 90502 USA
Titolo Testata:
ACADEMIC RADIOLOGY
fascicolo: 11, volume: 8, anno: 2001,
pagine: 1107 - 1115
SICI:
1076-6332(200111)8:11<1107:OETPIE>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Soggetto:
CORONARY-ARTERY STENOSES; COMPUTED-TOMOGRAPHY; MR-ANGIOGRAPHY; CARDIAC MOTION; BREATH-HOLD; QUANTIFICATION; CALCIFICATION; VELOCITY; DISEASE; HEART;
Keywords:
computed tomography (CT); artifact; computed tomography (CT); electron beam; coronary vessels; CT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
31
Recensione:
Indirizzi per estratti:
Indirizzo: Budoff, MJ Univ Calif Los Angeles, Harbor Res & Educ Inst, 1124 W Carson St,RB-2, Torrance, CA 90502 USA Univ Calif Los Angeles 1124 W Carson St,RB-2Torrance CA USA 90502
Citazione:
S.S. Mao et al., "Optimal ECG trigger point in electron-beam CT studies: Three methods for minimizing motion artifacts", ACAD RADIOL, 8(11), 2001, pp. 1107-1115

Abstract

Rationale and Objectives. The authors hypothesized that electrocardiographic triggering near end systole could minimize motion artifacts in electron-beam computed tomography (CT) of the coronary artery. Materials and Methods. The study included 2,660 patients who underwent coronary artery calcium scanning with electron-beam CT. Trigger times were as follows: end of T wave. 120 to 25 msec before end of T wave, 25-50 msec after end of T wave, 40%, 45%, 50%, 55%, 60%, 70%, 75%, 80%, 90%, and 100% of R-R interval. The authors divided each group into seven subgroups accordingto heart rate. The percentages of cases with motion artifact in the right coronary artery were computed. Optimal trigger times were defined for each group, as well as for scan acquisitions of 250 and 200 msec. Results. The optimal trigger times were as follows for heart rates of lessthan 50, 51-60, 61-70, 71-80, 81-90, 91-100, and more than 100 beats per minute, respectively: for 100-msec scans, 359 (27% of the R-R interval), 228(31%), 314 (34%), 304 (38%), 289 (41%), 283 (45%), and 274 msec (48%) after the R wave; for 250-msec scans, 840 (63%), 654 (60%), 240 (26%), 224 (28%), 219 (31%), 208 (33%), and 200 msec (35%) after the R wave; and for 200-msec scans, 722 (65%), 687 (63%), 249 (27%), 248 (31%), 244 (35%), 233 (37%), and 223 msec (39%) after the R wave. Conclusion. The use of these new electrocardiographic triggers before end systole yielded the lowest percentage of motion artifacts (<3% across all heart rates), much lower than for conventional triggers (51% of cases with motion artifact for 80% trigger, P < .001).

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 23/10/20 alle ore 14:22:06