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Titolo:
Thin-section CT of the lung: influence of 0.5-s gantry rotation and ECG triggering on image quality
Autore:
Montaudon, M; Berger, P; Blachere, H; De Boucaud, L; Latrabe, V; Laurent, F;
Indirizzi:
Univ Bordeaux 2, Lab Physiol Cellulaire Resp, INSERM, F-33076 Bordeaux, France Univ Bordeaux 2 Bordeaux France F-33076 INSERM, F-33076 Bordeaux, France Hosp Sud, Unite Imagerie Med Thorac & Cardiovasc, Hosp Cardiol, Grp Hosp Sud, F-33604 Pessac, France Hosp Sud Pessac France F-33604 iol, Grp Hosp Sud, F-33604 Pessac, France
Titolo Testata:
EUROPEAN RADIOLOGY
fascicolo: 9, volume: 11, anno: 2001,
pagine: 1681 - 1687
SICI:
0938-7994(2001)11:9<1681:TCOTLI>2.0.ZU;2-T
Fonte:
ISI
Lingua:
ENG
Soggetto:
MOTION ARTIFACTS; HELICAL CT; RESOLUTION;
Keywords:
lung, diffuse lung disease; CT, thin-section CT; CT technology;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
14
Recensione:
Indirizzi per estratti:
Indirizzo: Laurent, F Univ Bordeaux 2, Lab Physiol Cellulaire Resp, INSERM, E9937, F-33076 Bordeaux, France Univ Bordeaux 2 E9937 Bordeaux France F-33076 Bordeaux, France
Citazione:
M. Montaudon et al., "Thin-section CT of the lung: influence of 0.5-s gantry rotation and ECG triggering on image quality", EUR RADIOL, 11(9), 2001, pp. 1681-1687

Abstract

The aim of this study was to determine if ECG triggering and a shorter acquisition time of 0.5-s rotation decrease cardiac motion artifacts of thin-section CT of the lung. In 25 patients referred for thin-section thoracic CT, 1-mm thin-section slices were performed with a scanning time of 0.5 s with ECG gating, 0.5 s and 1 s during the diastolic phase of the heart at fiveidentical anatomical levels from the aortic arch to lung basis. At each anatomical level and for each lung, cardiac motion artifacts were graded independently on a four-point scale by three readers. Patients were divided into two groups according to their heart rate. A four-way analysis of variancewas used to assess differences between the three modalities. Mean cardiac motion artifacts scores were rated 1.23 +/- 0.02, 1.47 +/- 0.02, and 1.79 +/- 0.02, at 0.5 s with ECG gating, 0.5 s without ECG gating, and 1 s, respectively (F = 139, p < 0.0001). At the four anatomical levels below the aortic arch, the left lung scores were greater than the right lung score for the three modalities. For the modality 0.5 s with ECG gating no difference ofscores was found between patients grouped according to their cardiac frequency. The 0.5-s gantry rotation with or without ECG gating scans reduces cardiac motion artifacts on pulmonary thin-section CT images and is mainly beneficial for the lower part of the left lung.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 23/01/20 alle ore 18:30:59