Diagnostic impact of four postprocessing techniques in evaluating contrast-enhanced three-dimensional MR angiography.

Hany, Thomas F.; Schmidt, Michaela; Davis, C P; Göhde, Susanne C.; Debatin, J. F.

doi:10.2214/ajr.170.4.9530032

Cited by 61 publications

(32 citation statements)

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“…These results are comparable to those of Hany et al (11) which were 96%, 91% and 92% for MIP, regarding sensitivity, specificity and overall accuracy in detection of renal artery stenosis while for MPR they were 96%, 97% and 96%. In spite of the short post-processing times for MIP images, they are handicapped by projection -related limitations in a manner identical to conventional catheter angiogram.…”

Section: Discussionsupporting

confidence: 86%

Post Renal Transplant Surgical Complications; MRI Standard Applications and Diagnostic Outcomes

Ella¹

2017

IJMI

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Abstract:Objective: Fast MR imaging sequences together with paramagnetic contrast agents, offer multiple advantages in the assessment of renal function. It provides cross sectional and vascular information without the risk of ionizing radiation, iodinated contrast or arterial catheterization. Post transplantation complications can be grouped as surgical or medical. Immediate surgical complications include renal artery thrombosis or stenosis, urinary leak or lymphocele. Renal allograft frequently require repeated imaging studies during the immediate post-operative period and various times thereafter, when renal function is compromised. Background: End stage renal disease is common and can result from a variety of diseases. Kidney transplantation from living-related donors offered the best prognosis. Imaging modalities that are currently used to evaluate transplanted kidneys are ultrasound (US), computed tomography (CT), scintigraphy, intravenous urography (IVU), contrast angiography, and magnetic resonance imaging (MRI). Methods: This study was conducted on 181 renal transplant recipients. Recipients were 139 males and 42 females. Their age ranged from 20 to 58 years (mean age 39 years). The patients underwent clinical assessment, Laboratory investigations, and different Radiological imaging procedures as: I-Gray scale and color Doppler ultrasonography. II-Magnetic Resonance Imaging. 3D Gd-enhanced MRA. MR Urography. Selective IA-DSA of the graft artery. III-Percutaneous catheter nephrostomy (PCN) and antegrade pyelography. IV-Radio-isotope diuretic renogram using 99m Tc-MAG3. Results: 30 renal transplants were examined by MRI in the 1st 2 weeks after renal transplantation. At the end of 1st 2 weeks, MR examinations were carried out, as basal studies (including MRI, MRA and MRU) for 98 transplants. From this group, 64 transplants were subjected to other MR examinations. After the 1st 2 weeks, 53 transplants were subjected to MR examinations for the 1st time at variable post-transplant duration. Among the studied 181 renal transplants, MR examinations detected 3 cases with graft arteries thrombosis (1.6%), 10 with graft arteries stenosis (5.5%), 6 with segmental infarctions (3.3%), 3 cases with graft intrarenal arteries pseudo-aneurysms (1.6%) and 2 cases with arterio-venous fistulae (1.1%) after graft biopsies. Conclusion: MRI is highly recommended to evaluate intra-/extra-renal graft vascular lesions, urinary obstructive syndrome, compressive collections (urinoma, lymphocele), inflammatory and tumoral lesions of the renal graft.

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Section: Discussionsupporting

confidence: 86%

Post Renal Transplant Surgical Complications; MRI Standard Applications and Diagnostic Outcomes

Ella¹

2017

IJMI

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“…DSA. Future refinements in MR postprocessing technique will further improve this ability [30]. This may be even more problematic for visual assessment (as used in this study) compared with calliper measurement, a factor that may be amplified in a multicentre study.…”

Section: Discussionmentioning

confidence: 97%

Gadobutrol-enhanced moving-table magnetic resonance angiography in patients with peripheral vascular disease: a prospective, multi-centre blinded comparison with digital subtraction angiography

Hentsch¹,

Aschauer

Balzer

et al. 2003

Eur Radiol

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The purpose of this study was to compare moving-table three-dimensional contrast-enhanced magnetic resonance angiography (CE MRA), using 1.0-mol gadobutrol, with intra-arterial digital subtraction angiography (i.a. DSA) for evaluation of pelvic and peripheral arteries in patients with peripheral arterial occlusive disease. A total of 203 patients were examined in a prospective, multi-centre study at 1.0/1.5 T. Ten vessel segments of one leg were evaluated on-site and by three independent blinded reviewers off-site. One hundred eighty-two patients were evaluable in blinded reading. For pelvis and thigh, there was statistically significant diagnostic agreement between CE MRA and i.a. DSA on-site (94%) and off-site (86-88%). Overall, for detection of clinically significant stenoses, 93% sensitivity and 90% specificity were achieved in on-site evaluation, with 71-76 and 87-93% off-site; for detection of occlusion, sensitivity and specificity on-site were 91 and 97%, with 75-82 and 94-98% off-site. Evaluation was more sensitive on-site than off-site for detection of stenoses and occlusion, whereas specificity was similar. The CE MRA with 1.0-mol gadobutrol gave results comparable to those of i.a. DSA for the larger arteries of pelvis and thigh. Results for calf arteries were compromised by spatial resolution and technical limitations.

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“…Third-generation techniques that allow 3D volume acquisitions in a single breath-hold, in combination with real-time interactive slice positioning, appear very promising. Real-time slice positioning, and higher-resolution acquisition schemes, such as spiral MRA, can further improve and facilitate the use of these coronary MRA techniques (85)(86)(87)(88)(89)(90)(91)(92)(93)(94)(95)(96) (Figs. 7 and 8).…”

mentioning

confidence: 99%

Clinical utility of computed tomography and magnetic resonance techniques for noninvasive coronary angiography

Budoff

Achenbach

Duerinckx

2003

Journal of the American College of Cardiology

125

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Diagnostic impact of four postprocessing techniques in evaluating contrast-enhanced three-dimensional MR angiography.

Cited by 61 publications

References 0 publications

Post Renal Transplant Surgical Complications; MRI Standard Applications and Diagnostic Outcomes

Post Renal Transplant Surgical Complications; MRI Standard Applications and Diagnostic Outcomes

Gadobutrol-enhanced moving-table magnetic resonance angiography in patients with peripheral vascular disease: a prospective, multi-centre blinded comparison with digital subtraction angiography

Clinical utility of computed tomography and magnetic resonance techniques for noninvasive coronary angiography

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