3D contrast-enhanced MR angiography of the abdominal aorta and its distal branches: Interobserver agreement of radiologists in a routine examination1

Billaud, Y; Beuf, Olivier; Desjeux, G.; Valette, P J; Pilleul, F.

doi:10.1016/j.acra.2004.10.060

Cited by 14 publications

(8 citation statements)

References 30 publications

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“…By using contrast, so-called contrast enhanced (ce)-MRA it is possible to identify splanchnic artery stenoses and even collaterals, for example Riolan's artery [60][61][62] . Surprisingly, we could identify only two studies that compared digital subtraction angiography (DSA) with MRA in 19 [63] and 23 patients [61] with good correlation.…”

Section: Mramentioning

confidence: 99%

Diagnosis and management of splanchnic ischemia

Kolkman¹,

Bargeman²,

Huisman³

et al. 2008

WJG

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Section: Mramentioning

confidence: 99%

Diagnosis and management of splanchnic ischemia

Kolkman¹,

Bargeman²,

Huisman³

et al. 2008

WJG

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“…Both readers noted that image quality on fast MRA improved primarily because of reduced motion-related blurring artefacts compared with conventional MRA. Motion of the proximal branches of the abdominal aorta is a well-known limitation when imaging visceral arteries on MRA [7,8]. In a recent investigation of image quality of conventional MRA in assessing visceral arteries, the authors pointed out that image quality of celiac, mesenteric and hepatic arteries was impaired because of motion-induced blurring artefacts in the subgroup of patients not able to hold their breath for the entire duration of image acquisition [7].…”

Section: Discussionmentioning

confidence: 99%

“…In a recent investigation of image quality of conventional MRA in assessing visceral arteries, the authors pointed out that image quality of celiac, mesenteric and hepatic arteries was impaired because of motion-induced blurring artefacts in the subgroup of patients not able to hold their breath for the entire duration of image acquisition [7]. This phenomenon has been known since the early studies on abdominal MRA [9] and affected as many as 16% of patients undergoing conventional MRA in a recent study [7]. Blurring artefacts in proximal visceral arteries are caused by small movements of the diaphragm during breathholding [26], by motion triggered through cardiac contraction and pulsatile oscillations of the aorta and its branches [27,28], as well as by motion as a result of intestinal peristalsis [29].…”

Section: Discussionmentioning

confidence: 99%

“…Motion of the proximal branches of the abdominal aorta is a well-known limitation when imaging visceral arteries on MRA [7,8]. In a recent investigation of image quality of conventional MRA in assessing visceral arteries, the authors pointed out that image quality of celiac, mesenteric and hepatic arteries was impaired because of motion-induced blurring artefacts in the subgroup of patients not able to hold their breath for the entire duration of image acquisition [7]. This phenomenon has been known since the early studies on abdominal MRA [9] and affected as many as 16% of patients undergoing conventional MRA in a recent study [7].…”

Section: Discussionmentioning

confidence: 99%

“…While the first reports on contrast-enhanced three-dimensional (3D) magnetic resonance angiography (MRA) of visceral arteries were published in the late 1990s [4][5][6], widespread clinical use of conventional 3D MRA has been hampered by several disadvantages compared with MDCTA such as lower spatial resolution and longer breath-hold times with consequent impaired image quality [7][8][9]. In particular, image quality in patients with compromised respiratory function or patients unable to remain still during data acquisition tends to be impaired using conventional MRA.…”

Section: Introductionmentioning

confidence: 99%

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MR angiography with parallel acquisition for assessment of the visceral arteries: comparison with conventional MR angiography and 64-detector-row computed tomography

et al. 2009

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MR angiography with parallel acquisition for assessment of the visceral arteries: comparison with conventional MR angiography and 64-detector-row computed tomography Abstract The purpose of the study was to retrospectively compare threedimensional gadolinium-enhanced magnetic resonance angiography (conventional MRA) with MRA accelerated by a parallel acquisition technique (fast MRA) for the assessment of visceral arteries, using 64-detector-row computed tomography angiography (MDCTA) as the reference standard. Eighteen patients underwent fast MRA (imaging time 17 s), conventional MRA (29 s) and MDCTA of the abdomen and pelvis. Two independent readers assessed subjective image quality and the presence of arterial stenosis. Data were analysed on per-patient and persegment bases. Fast MRA yielded better subjective image quality in all segments compared with conventional MRA (P=0.012 for reader 1, P=0.055 for reader 2) because of fewer motioninduced artefacts. Sensitivity and specificity of fast MRA for the detection of arterial stenosis were 100% for both readers. Sensitivity of conventional MRA was 89% for both readers, and specificity was 100% (reader 1) and 99% (reader 2). Differences in sensitivity between the two types of MRA were not significant for either reader. Interobserver agreement for the detection of arterial stenosis was excellent for fast (κ=1.00) and good for conventional MRA (κ=0.76). Thus, subjective image quality of visceral arteries remains good on fast MRA compared with conventional MRA, and the two techniques do not differ substantially in the grading of arterial stenosis, despite the markedly reduced acquisition time of fast MRA.

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3D‐liver perfusion MRI with the MS‐325 blood pool agent: A noninvasive protocol to asses liver fibrosis

Leporq

Dumortier

Pilleul

et al. 2012

Magnetic Resonance Imaging

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Purpose: To evaluate a 1.5T magnetic resonance imaging (MRI) protocol, including a dedicated acquisition sequence and a postprocessing tool for the quantitative analysis of hepatic tissue perfusion. Estimated perfusion parameters and histological results based on the METAVIR classification were prospectively compared for hepatic fibrosis assessment. Materials and Methods:The study protocol was approved by the experimentation Ethics Committee and informed consent was obtained. Sixteen patients (6 women, 10 men; average age, 52.4 6 14.8 years) with chronic liver diseases were prospectively enrolled after a liver biopsy. MS-325 (paramagnetic blood pool agent)-enhanced MRI was performed using a free-breath 3D-VIBE T 1w sequence. Image volumes were registered by an automatic rigid method. Liver perfusion was modeled by a dual-input-one-compartment model and quantitative perfusion parameters such as arterial, portal, and total perfusion mean transit time (MTT) and hepatic perfusion index (HPI) were obtained using in-house developed software.Results: Arterial perfusion increased with METAVIR stage, whereas portal perfusion decreased leading to an HPI increase with fibrosis stage. MTT increased with F3, F4. A nonparametric Mann-Whitney test demonstrated that HPI and portal perfusion were relevant in discriminating between advanced and nonadvanced fibrosis, between fibrosis and cirrhosis, then between nonfibrosis and fibrosis (P < 0.01). A strong correlation was found between portal perfusion fall-off and HPI increase (r ¼ À0.97; P < 0.001). HPI and portal perfusion were strongly correlated with fibrosis stage (r ¼ 0.83 and À0.88; P < 0.001, respectively).Conclusion: HPI and portal perfusion could be relevant indicators for the clinical follow-up in patients with chronic liver diseases.

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3D contrast-enhanced MR angiography of the abdominal aorta and its distal branches: Interobserver agreement of radiologists in a routine examination1

Cited by 14 publications

References 30 publications

Diagnosis and management of splanchnic ischemia

Diagnosis and management of splanchnic ischemia

MR angiography with parallel acquisition for assessment of the visceral arteries: comparison with conventional MR angiography and 64-detector-row computed tomography

3D‐liver perfusion MRI with the MS‐325 blood pool agent: A noninvasive protocol to asses liver fibrosis

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