High-Field-Strength MR Imaging of the Liver at 3.0 T: Intraindividual Comparative Study with MR Imaging at 1.5 T

Falkenhausen, Marcus M. von; Lutterbey, G.; Morakkabati-Spitz, N; Walter, Oliver; Gieseke, Jürgen; Blömer, R; Willinek, Winfried A.; Schild, Hans H.; Kuhl, Christiane K.

doi:10.1148/radiol.2411051221

Cited by 57 publications

(34 citation statements)

References 17 publications

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“…Signal-to-noise ratios for liver were significantly higher at 3.0 T using T2-weighted HASTE (half-Fourier acquisition single-shot turbo spin-echo) and a T1-weighted gradient-echo in-and opposed-phase sequence [50]. Using superparamagnetic iron oxide (SPIO)-enhanced MRI, stronger signal attenuation does not occur with 3-T versus 1.5-T [51]. One study suggests that the image quality of the 1.5-T non-contrast T1-and T2-weighted sequences is significantly better than with 3-T imaging [52].…”

Section: -T Liver Mrimentioning

confidence: 99%

Consensus report of the 2nd International Forum for Liver MRI

et al. 2009

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Discussion at the 2nd Forum for Liver MRI: The International Primovist User Meeting on the use of the hepatocyte-specific contrast agent gadolinium-ethoxybenzyl-diethylene triamine penta-acetic acid (Gd-EOB-DTPA) is reported. Changes to the currently recommended Gd-EOB-DTPA imaging protocol were identified that can reduce the overall examination time. The potential benefits of 3-T MR imaging using Gd-EOB-DTPA have yet to be fully explored. Data show that Gd-EOB-DTPA-enhanced MRI allows identification of liver lesions and provides a differential diagnosis of hepatocellular nodules in the noncirrhotic and cirrhotic liver, based on vascularity, during the dynamic arterial, portal-venous and late phases, and during the hepatocytespecific phase. Current European, American and Japanese guidelines for the diagnosis of hepatocellular carcinoma need to take into account the recent rapid advances in liver imaging. Based on published clinical trials and the experience of the attendees in the use of Gd-EOB-DTPA in liver imaging, a new simplified, non-invasive diagnostic algorithm was proposed that would be applicable to both Eastern and Western clinical practice in the evaluation of hepatocarcinogenesis and hepatocellular carcinoma. Preliminary clinical experience suggests that Gd-EOB-DTPA may also provide an innovative and cost-effective one-stop approach for staging rectal cancer using wholebody imaging.

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Section: -T Liver Mrimentioning

confidence: 99%

Consensus report of the 2nd International Forum for Liver MRI

et al. 2009

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“…Von Falkenhausen and colleagues reported a signiˆcant diŠerence in the number and severity of these artifacts during liver evaluation at 1.5 and 3T. 21 In one of our study patients who was unable to keep her body still during examination, motion artifact was graded as 3; moderate. Most other cases were graded 4 or 5.…”

Section: Discussionmentioning

confidence: 56%

Visualization of Ovarian Tumors using 3T MR Imaging: Diagnostic Effectiveness and Difficulties

Uehara

Takahama

Marugami

et al. 2012

MRMS

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Purpose: We evaluated the diagnostic eŠectiveness of magnetic resonance (MR) imaging at 3 tesla to visualize ovarian tumors and problems associated with its use.Materials and Methods: From the records of 423 consecutive women who underwent pelvic MR imaging using a 3T system from April 2009 to June 2010, we analyzed 50 continuous cases of ovarian tumors proved by histopathology. We evaluated visualization of these tumors for image quality and artifacts using 5-point scales. For qualitative assessment, we scored overall image quality (1, poor, to 5, excellent), degree of conviction regarding the diagnosis (1, undiagnosable, to 5, diagnosable with high certainty), and 4 representative artifacts (penetrating, chemical shift, motion, and susceptibility artifact) (1, severe, to 5, little degradation). We also retrospectively reviewed the diagnostic features of the ovarian tumors and preoperative diagnostic accuracy. For quantitative assessment, we determined tumor size and ADC value.Results: Overall quality score was scored 4.9±0.5, and conviction regarding diagnosis was 4.9±0.3. Artifacts caused little degradation in most cases: penetrating, 4.8±0.5; chemical shift, 4.3±0.5; motion, 4.6±0.6; and susceptibility, 3.8±0.9. Preoperative diagnostic accuracy was 92z (sensitivity 94.7z, speciˆcity 90.3z). Mean tumor diameter was 88.3±61 mm. The mean ADC value was 1.04±0.3 in malignant tumors and 1.15±0.5 (×10 -6 mm 2 /s) in benign tumors.Conclusion: The quality of ovarian tumor images obtained with a 3T MR imaging system is adequate for diagnosis, with only slight degradation from penetrating or susceptibility artifacts.

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“…With 1.5-T image sets, two readers assigned this lesion a confidence score of 1, and the remaining reader assigned a score of 2. The 3.0-T image sets were superior to the 1.5-T image sets for the detection of small hepatic metastases at 3.0 T was significantly worse than that at 1.5 T. A possible explanation is that severe motion artefacts affected the image quality, which has been suggested by previous studies as well [3,[6][7][8]24]. Moreover, we used respiratory-triggered T2-weighted sequences in our study.…”

Section: Discussionmentioning

confidence: 73%

“…Several problems caused by the stronger magnets, including increased magnetic susceptibility, chemical shift effects, radiofrequency power deposition and altered tissue relaxation time, may affect image quality, especially in upper abdominal MR images [3][4][5]. However, the development of dedicated receiver coils and increased gradient performance, substantial modification of pulse sequences and optimised imaging parameters and sequence designs, together with improved hardware, may contribute to minimising the occurrence of artefacts with 3.0-T systems [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Detection of hepatic metastases by superparamagnetic iron oxide-enhanced MR imaging: prospective comparison between 1.5-T and 3.0-T images in the same patients

Sofue¹,

Tsurusaki

Miyake³

et al. 2010

Eur Radiol

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High-Field-Strength MR Imaging of the Liver at 3.0 T: Intraindividual Comparative Study with MR Imaging at 1.5 T

Abstract: MR imaging of the liver at 3.0 T, compared with that at 1.5 T, is feasible with equivalent image quality and diagnostic utility in terms of detection and characterization of focal liver lesions.

Cited by 57 publications

References 17 publications

Consensus report of the 2nd International Forum for Liver MRI

Consensus report of the 2nd International Forum for Liver MRI

Visualization of Ovarian Tumors using 3T MR Imaging: Diagnostic Effectiveness and Difficulties

Detection of hepatic metastases by superparamagnetic iron oxide-enhanced MR imaging: prospective comparison between 1.5-T and 3.0-T images in the same patients

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