Diffusion-weighted MRI of abscess formations in children and young adults

Neubauer, Henning; Platzer, Isabel; Mueller, Verena Rabea; Meyer, Thomas; Liese, Johannes G.; Koestler, Herbert; Hahn, Dietbert; Beer, Meinrad

doi:10.1007/s12519-012-0362-4

Cited by 23 publications

(9 citation statements)

References 16 publications

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“…Although there are no systematic studies on how DWI and ADC values depend on scanner type and technical setup, a certain interference of such variables with our study results cannot be ruled out completely. An earlier study, we did not find significant differences between-scanner differences in mean ADC [22]. …”

Section: Discussionmentioning

confidence: 50%

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Diffusion-weighted MRI of bone marrow oedema, soft tissue oedema and synovitis in paediatric patients: feasibility and initial experience

et al. 2012

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BackgroundMRI has become the mainstay of diagnostic imaging in paediatric rheumatology for lesion detection, differential diagnosis and therapy surveillance. MR imaging of synovitis, in particular, is indispensable for early diagnosis and follow-up in arthritis patients. We used diffusion-weighted MRI (DWI) as a new imaging modality in comparison to standard MRI sequences to study bone marrow oedema, soft-tissue oedema and synovitis in paediatric patients.MethodsA total of 52 patients (mean age 11 ± 5 years) with bone marrow oedema (n = 31), soft-tissue oedema (n = 20) and synovitis (n = 15) were examined with transversal diffusion-weighted single-shot echoplanar imaging in addition to standard MR sequences (T2W TIRM, T1W pre- and post-contrast). Diffusion-weighted images were used for lesion detection and apparent diffusion coefficient (ADC, unit × 10-3 mm2/s) values were measured with ROI technique on ADC maps.ResultsIn 50 of 52 patients, DWI delineated the lesion of interest corresponding to pathological signal increase on standard sequences. Mean ADC was 1.60 ± 0.14 (range 1.38 - 1.99) in osseous lesions, 1.72 ± 0.31 (range 1.43 - 2.56) in soft tissue oedema and 2.82 ± 0.24 (range 2.47 - 3.18) for joint effusion (ANOVA p < 0.001). No significant difference in mean ADC was seen for inflammatory vs. non-inflammatory lesions. Relative signal intensity of oedema was similar for DWI and T2W TIRM. DWI visualised synovial restricted diffusion with a mean ADC of 2.12 ± 0.45 in 12 of 15 patients with synovitis.ConclusionsDiffusion-weighted MRI reliably visualises osseous and soft tissue oedema, as compared to standard sequences. DWI of synovitis is feasible in large joints and presents a novel approach to contrast-free imaging of synovitis. Whole-body DWI for chronic non-bacterial osteomyelitis should be evaluated in future studies.

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Section: Discussionmentioning

confidence: 50%

“…The option of contrast-free scanning certainly is of clinical significance. Secondly, DWI provides additional information to differentiate tumorous from inflammatory musculoskeletal lesions and abscess [22]. DWI is less sensitive to motion artefacts, than are standard sequences.…”

Section: Discussionmentioning

confidence: 99%

Diffusion-weighted MRI of bone marrow oedema, soft tissue oedema and synovitis in paediatric patients: feasibility and initial experience

et al. 2012

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“…This shows restricted diffusion in abscesses as opposed to cysts without the need to use contrast agents in pregnant women (Figure 2) [9]. …”

Section: Discussionmentioning

confidence: 99%

Diagnostic Imaging of Pregnant Women – The Role of Magnetic Resonance Imaging

Bekiesińska‐Figatowska¹,

Romaniuk-Doroszewska²,

Szkudlińska-Pawlak³

et al. 2018

Pol J Radiol

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SummaryBackgroundPresentation of magnetic resonance imaging (MRI) findings in pregnant women in the Department of Diagnostic Imaging, Institute of Mother and Child, Warsaw, Poland.Material/MethodsForty-three symptomatic pregnant women underwent MRI between 9 and 33 weeks of gestation (mean of 23 weeks). Moreover, we included 2 pregnant women who underwent fetal MRI and had incidental abnormalities.ResultsIn 9 cases, we excluded the suspected brain abnormalities. In 4 cases, we found unremarkable changes in the brain without clinical significance. One patient was diagnosed with multiple sclerosis, one with cortical dysplasia, one with pineal hemorrhage and one with a brain tumor. On abdominal MRI, 2 patients had normal findings, one patient had colon cancer with a hepatic metastasis, one patient had a hepatic angioma, one patient had an extraadrenal pheochromocytoma, one patient had an abscess in the iliopsoas muscle, 9 patients had myomas, two patients had ovarian simple cysts, two endometrial cysts, three dermoid cysts, one patient had sacrococcygeal teratoma, one patient had a cystadenofibroma (partial borderline tumor), one patient had an androgenic ovarian tumor and two patients had hyperreactio luteinalis. One patient was diagnosed with transient osteoporosis of the hip and one with a stress fracture of the sacral bone.ConclusionsMagnetic resonance imaging is the best imaging modality for pregnant women. Although ultrasonography is the method of choice, doubtful cases as well as structures that cannot be examined with ultrasonography can be non-invasively evaluated with MRI.

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“…MRI is not commonly used in the examination of simple pulmonary inflammation, but it can be useful if complications, for example abscess formation, are suspected (Figs. 5 and 6) [7]. In lung tuberculosis, the characteristically enlarged lymph nodes and additional abnormalities can be visualized by MRI (Figs.…”

Section: Inflammatory Changesmentioning

confidence: 98%

“…A second point is the fact that, in certain diseases, the lung MRI is not only of equal value to CT, but in individual cases MRI can even be superior. Additional informationsuch as the detection of pus in pneumonia with abscess formation [7] or signal-reduced lymph nodes…”

Section: Why Magnetic Resonance Imaging?mentioning

confidence: 99%

The current status and further prospects for lung magnetic resonance imaging in pediatric radiology

Hirsch¹,

Sorge²,

Vogel‐Claussen

et al. 2020

Pediatr Radiol

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Lung MRI makes it possible to replace up to 90% of CT examinations with radiation-free magnetic resonance diagnostics of the lungs without suffering any diagnostic loss. The individual radiation exposure can thus be relevantly reduced. This applies in particular to children who repeatedly require sectional imaging of the lung, e.g., in tumor surveillance or in chronic lung diseases such as cystic fibrosis. In this paper we discuss various factors that favor the establishment of lung MRI in the clinical setting. Among the many sequences proposed for lung imaging, respiration-triggered T2-W turbo spin-echo (TSE) sequences have been established as a good standard for children. Additional sequences are mostly dispensable. The most important pulmonary findings are demonstrated here in the form of a detailed pictorial essay. T1-weighted gradient echo sequences with ultrashort echo time are a new option. These sequences anticipate signal loss in the lung and deliver CT-like images with high spatial resolution. When using self-gated T1-W ultrashort echo time 3-D sequences that acquire iso-voxel geometry in the submillimeter range, secondary reconstructions are possible.

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Diffusion-weighted MRI of abscess formations in children and young adults

Cited by 23 publications

References 16 publications

Diffusion-weighted MRI of bone marrow oedema, soft tissue oedema and synovitis in paediatric patients: feasibility and initial experience

Diffusion-weighted MRI of bone marrow oedema, soft tissue oedema and synovitis in paediatric patients: feasibility and initial experience

Diagnostic Imaging of Pregnant Women – The Role of Magnetic Resonance Imaging

The current status and further prospects for lung magnetic resonance imaging in pediatric radiology

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