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Titolo:
Renal arteries: Optimization of three-dimensional gadolinium-enhanced MR angiography with bolus-timing-independent fast multiphase acquisition in a single breath hold
Autore:
Schoenberg, SO; Bock, M; Knopp, MV; Essig, M; Laub, G; Hawighorst, H; Zuna, I; Kallinowski, F; van Kaick, G;
Indirizzi:
German Canc Res Ctr, Dept Radiol, D-69120 Heidelberg, Germany German Canc Res Ctr Heidelberg Germany D-69120 69120 Heidelberg, Germany Siemens Med Syst Inc, Erlangen, Germany Siemens Med Syst Inc Erlangen Germany s Med Syst Inc, Erlangen, Germany Univ Heidelberg Hosp, Dept Surg, Heidelberg, Germany Univ Heidelberg HospHeidelberg Germany Dept Surg, Heidelberg, Germany
Titolo Testata:
RADIOLOGY
fascicolo: 3, volume: 211, anno: 1999,
pagine: 667 - 679
SICI:
0033-8419(199906)211:3<667:RAOOTG>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
TIME-OF-FLIGHT; ABDOMINAL-AORTA; IMAGE QUALITY; BLOOD-FLOW; STENOSIS; HYPERTENSION; SEQUENCES; ORDER;
Keywords:
magnetic resonance (MR), maximum intensity projection; magnetic resonance (MR), three-dimensional; magnetic resonance (MR), vascular studies; renal arteries, MR;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Life Sciences
Citazioni:
28
Recensione:
Indirizzi per estratti:
Indirizzo: Schoenberg, SO German Canc Res Ctr, Dept Radiol, Neuenheimer Feld 280, D-69120 Heidelberg, German Canc Res Ctr Neuenheimer Feld 280 Heidelberg Germany D-69120
Citazione:
S.O. Schoenberg et al., "Renal arteries: Optimization of three-dimensional gadolinium-enhanced MR angiography with bolus-timing-independent fast multiphase acquisition in a single breath hold", RADIOLOGY, 211(3), 1999, pp. 667-679

Abstract

PURPOSE: To compare two different three-dimensional (3D) gadolinium-enhanced magnetic resonance (MR) angiographic techniques. MATERIALS AND METHODS: In 26 patients suspected of having renal artery stenosis, results with fast multiphase 3D MR angiography were compared to those with standard 3D MR angiography in 37 patients. With both techniques, 31-second breath-hold acquisitions were Performed. Multiphase angiography comprised five discrete 6.4-second acquisitions without bolus timing, and standard angiography comprised a single acquisition based on test-bolus timing. Two readers evaluated images obtained with both techniques in terms of image quality, artifacts, and vessel conspicuity. Accuracy of findings on the multiphase 3D MR angiograms for assessment of renal artery stenosis was determined by comparing them to digital subtraction angiograms and surgical findings. RESULTS: In the early arterial phase, multiphase 3D MR angiograms showed no image degradation by venous overlay, whereas: standard 3D MR angiograms depicted at least minor overlay in 53 of 83 renal arteries (P < .001). Less parenchymal enhancement in the early arterial phase resulted in a higher vessel conspicuity for the divisions and segmental arteries(P < .001). Both readers detected and correctly graded 18 of 20 stenoses on the multiphase angiograms with almost perfect interobserver agreement (kappa > 0.89). CONCLUSION: Renal multiphase 3D MR angiography is an accurate technique requiring no bolus timing. The performance of early arterial phase imaging leads to improved depiction, particularly of the distal renovascular tree,compared to that with standard single-phase 3D MR angiography.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 23/09/20 alle ore 11:21:13