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Titolo:
Contrast-enhanced three-dimensional MR angiography of the thoracic aorta: experiences after 118 examinations with a standard dose contrast administration and different injection protocols
Autore:
Kreitner, KF; Kunz, RP; Kalden, P; Kauczor, HU; Schmitt, S; Kuroczynski, W; Mohr-Kahaly, S; Voightlander, T; Krummenauer, F; Laub, G; Thelen, M;
Indirizzi:
Univ Mainz, Dept Radiol, D-55131 Mainz, Germany Univ Mainz Mainz GermanyD-55131 nz, Dept Radiol, D-55131 Mainz, Germany Univ Mainz, Dept Internal Med, Div Cardiol, D-55131 Mainz, Germany Univ Mainz Mainz Germany D-55131 ed, Div Cardiol, D-55131 Mainz, Germany Univ Mainz, Dept Cardiothorac & Vasc Surg, D-55131 Mainz, Germany Univ Mainz Mainz Germany D-55131 rac & Vasc Surg, D-55131 Mainz, Germany Univ Mainz, Dept Med Stat & Documentat, D-55131 Mainz, Germany Univ MainzMainz Germany D-55131 at & Documentat, D-55131 Mainz, Germany Siemens Med Engn, D-91318 Erlangen, Germany Siemens Med Engn Erlangen Germany D-91318 ngn, D-91318 Erlangen, Germany
Titolo Testata:
EUROPEAN RADIOLOGY
fascicolo: 8, volume: 11, anno: 2001,
pagine: 1355 - 1363
SICI:
0938-7994(2001)11:8<1355:CTMAOT>2.0.ZU;2-T
Fonte:
ISI
Lingua:
ENG
Soggetto:
MAGNETIC-RESONANCE ANGIOGRAPHY; BREATH-HOLD; ARCH VESSELS; TIME; OPTIMIZATION; ACQUISITION; AORTOGRAPHY; ARTIFACTS; ARRIVAL;
Keywords:
thoracic aorta; magnetic resonance angiography; three-dimensional; contrast enhancement; timing run;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
32
Recensione:
Indirizzi per estratti:
Indirizzo: Kreitner, KF Univ Mainz, Dept Radiol, Langenbeckstr 1, D-55131 Mainz, Germany Univ Mainz Langenbeckstr 1 Mainz Germany D-55131 nz, Germany
Citazione:
K.F. Kreitner et al., "Contrast-enhanced three-dimensional MR angiography of the thoracic aorta: experiences after 118 examinations with a standard dose contrast administration and different injection protocols", EUR RADIOL, 11(8), 2001, pp. 1355-1363

Abstract

The aim of this study was to test three injection protocols for contrast-enhanced magnetic resonance angiography (MRA) of the thoracic aorta with a standard-dose application. Ninety-three patients with a total of 118 examinations underwent MRA of the thoracic aorta at 1.5 T. There were three injection protocols: in 24 cases, no test bolus was performed and contrast was injected manually; in 14 cases, contrast was injected manually after a test bolus; and in 80 cases, a MR-compatible injector was used after a timing examination. All patients received 20 ml of Gd-DTPA. Quantitative signal-to-noise (SNR) measurements were obtained at different locations in the thoracicaorta, the pulmonary arteries, and the superior vena cava. Two readers in conference retrospectively evaluated each examination with respect to overall image quality and quality of bolus timing. Bolus timing was considered optimal in 70 cases, and either too early or too late in 11 cases. In 37 examinations the bolus was broadened. The SNR measurements of the thoracic aorta revealed that examinations after bolus testing were significantly superior to examinations without a test bolus (p < 0.001). Signal intensity ratios of the aorta and the pulmonary trunk were significantly higher in examinations with an optimal contrast timing (p < 0.001). Magnetic resonance angiograms of the thoracic aorta with a timing run are significantly superior tonon-timed examinations with respect to image quality and SNRs. The administration of 20 ml of Gd-DTPA is sufficient for adult patients.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 18/01/20 alle ore 01:38:36