Magnetic resonance imaging in childhood leukemia survivors treated with cranial radiotherapy: A cross sectional, single center study

Abstract Objectives This study aimed to examine the alterations in magnetic resonance imaging (MRI) characteristics of bioabsorbable magnesium (Mg) screws over time in a single center study in humans. Methods Seventeen patients who underwent medial malleolar (MM) fracture or osteotomy fixation using bioabsorbable Mg screws and had at least one postoperative MRI were included in this retrospective study. Six of them had more than one MRI in the postoperative period and were subject of the artifact reduction measurements. 1.5T or 3T MRI scans were acquired in different periods in each patient. The size and extent of the artifact were assessed independently by two experienced radiologists both quantitatively (distance measurement) and qualitatively (Likert scale). Results In the quantitative measurements of the six follow-up patients the screw’s signal loss artifact extent significantly decreased over the time, regardless of the MRI field strength (p<0.001). The mean artifact reduction was 0.06 mm (95% confidence interval [CI]: 0.05–0.07) for proton density weighted [PDw] and 0.04 mm (95% CI: 0.03–0.05) for T1 weighted (T1w) sequences per week. The qualitative assessments similarly showed significant artifact reduction in all MRI sequences. Different imaging findings, like bone marrow edema (BME), liquid collections, and gas formation were reported. The overall inter-reader agreement was high (κ=0.88, p<0.001). Conclusions The time-dependent artifact reduction of Mg screws in postoperative controls might indicate the expected self-degradation of the Mg implants. In addition, different MRI findings were reported, which are characteristic of Mg implants. Further MRI studies are required to get a better understanding of Mg imaging properties.

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Cardiac iron overload evaluation in thalassaemic patients using T2* magnetic resonance imaging following chelation therapy: a multicentre cross-sectional study

Hematology Transfusion and Cell Therapy ◽

10.1016/j.htct.2021.01.014 ◽

2021 ◽

Author(s):

Eduardo Cerello Chapchap ◽

Murilo Marques Almeida Silva ◽

Reijane Alves de Assis ◽

Lucila Nassif Kerbauy ◽

Michelli da Silva Diniz ◽

...

Keyword(s):

Magnetic Resonance Imaging ◽

Magnetic Resonance ◽

Iron Overload ◽

Chelation Therapy ◽

Cross Sectional Study ◽

Sectional Study ◽

Resonance Imaging ◽

Cross Sectional ◽

Cardiac Iron ◽

Cardiac Iron Overload

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Cross-sectional anatomy, computed tomography, and magnetic resonance imaging of the banded houndshark (Triakis scyllium)

Scientific Reports ◽

10.1038/s41598-020-80823-y ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Sang Wha Kim ◽

Adams Hei Long Yuen ◽

Cherry Tsz Ching Poon ◽

Joon Oh Hwang ◽

Chang Jun Lee ◽

...

Keyword(s):

Magnetic Resonance Imaging ◽

Computed Tomography ◽

Magnetic Resonance ◽

Soft Tissues ◽

Imaging Techniques ◽

Evolutionary Developmental Biology ◽

Phylogenetic Position ◽

Ct Scanner ◽

Resonance Imaging ◽

Cross Sectional

AbstractDue to their important phylogenetic position among extant vertebrates, sharks are an invaluable group in evolutionary developmental biology studies. A thorough understanding of shark anatomy is essential to facilitate these studies and documentation of this iconic taxon. With the increasing availability of cross-sectional imaging techniques, the complicated anatomy of both cartilaginous and soft tissues can be analyzed non-invasively, quickly, and accurately. The aim of this study is to provide a detailed anatomical description of the normal banded houndshark (Triakis scyllium) using computed tomography (CT) and magnetic resonance imaging (MRI) along with cryosection images. Three banded houndsharks were scanned using a 64-detector row spiral CT scanner and a 3 T MRI scanner. All images were digitally stored and assessed using open-source Digital Imaging and Communications in Medicine viewer software in the transverse, sagittal, and dorsal dimensions. The banded houndshark cadavers were then cryosectioned at approximately 1-cm intervals. Corresponding transverse cryosection images were chosen to identify the best anatomical correlations for transverse CT and MRI images. The resulting images provided excellent detail of the major anatomical structures of the banded houndshark. The illustrations in the present study could be considered as a useful reference for interpretation of normal and pathological imaging studies of sharks.

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Magnetic resonance imaging template to standardize reporting of anal fistulas

Techniques in Coloproctology ◽

10.1007/s10151-020-02384-6 ◽

2021 ◽

Author(s):

I. Sudoł-Szopińska ◽

G. A. Santoro ◽

M. Kołodziejczak ◽

A. Wiaczek ◽

U. Grossi

Keyword(s):

Magnetic Resonance Imaging ◽

Magnetic Resonance ◽

Treatment Strategies ◽

Cross Sectional Study ◽

Resonance Imaging ◽

Anal Fistulas ◽

Cross Sectional ◽

Radiology Reports ◽

Colorectal Surgeons ◽

Magnetic Resonance Imaging Mri

AbstractAnal fistula (AF) is a common referral to colorectal surgeons. Management remains challenging and sometimes controversial. Magnetic resonance imaging (MRI) is commonly performed in initial workup for AF. However, reports often lack key information for guiding treatment strategies. It has been shown that with structured radiology reports, there is less missing information. We present a structured MRI template report including 8 key descriptors of anal fistulas, whose effectiveness and acceptability are being assessed in a cross-sectional study (NCT04541238).

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