Related Experiment Videos
Magnetic resonance imaging of iron overload in children treated with peritoneal dialysis
U Querfeld1, R Dietrich, R K Taira
1Department of Pediatrics, UCLA Center for the Health Sciences.
Insights
Magnetic resonance imaging (MRI) can detect iron overload in children with end-stage renal disease (ESRD). MRI signal intensity and spin echo intensity measurements correlate with serum ferritin levels, confirming its utility.
Area of Science:
- Radiology
- Pediatric Nephrology
- Medical Imaging
Background:
- Children with end-stage renal disease (ESRD) often require multiple transfusions, increasing the risk of iron overload.
- Accurate assessment of iron overload is crucial for managing these patients.
- Current methods for assessing iron overload may have limitations.
Purpose of the Study:
- To evaluate the ability of magnetic resonance imaging (MRI) to detect and quantify iron overload in children with ESRD.
- To compare MRI findings with serum ferritin levels and other quantitative measures.
Main Methods:
- 18 multiply transfused children with ESRD and 5 healthy controls were studied.
- MRI parameters included subjective signal intensity ratings, T1 values of liver and spleen, and computer-assisted spin echo intensity (SEI) measurements.
- MRI findings were correlated with serum ferritin (SF) levels.
Main Results:
- Subjective MRI signal intensity of the liver and spleen correlated significantly with SF levels.
- Mean T1 values of the liver and spleen did not correlate with SF levels.
- Computer-assisted SEI ratios (e.g., fat/liver, muscle/spleen) showed significant correlations with SF levels and subjective MRI ratings.
Conclusions:
- MRI is a suitable non-invasive technique for documenting the presence and degree of iron overload in multiply transfused children with ESRD.
- MRI's ability to assess iron deposition can aid in clinical management decisions.
- Spin echo intensity measurements offer a quantitative approach to iron overload assessment via MRI.
Abstract:
The ability of magnetic resonance imaging (MRI) to detect iron overload in children with end-stage renal disease (ESRD) was studied in 18 multiply transfused patients, aged 15.5 +/- 4.8 years, and 5 nontransfused children without evidence of renal disease. In the transfused patients, the serum ferritin (SF) level was compared to (a) a subjective rating of signal intensity of MRI images (scale of 0-10), (b) mean T1 values of liver and spleen, and (c) computer-assisted measurements of spin echo intensity (SEI) of liver, spleen, muscle and fat tissue. On subjective evaluation, the mean signal intensity was significantly lower in transfused patients than in controls and a significant correlation with the SF levels was observed for ratings of both liver and spleen. Mean T1 values of liver and spleen did not correlate with the SF levels. On computer analysis, the ratios of SEI of fat/liver, fat/spleen, muscle/liver and muscle/spleen were significantly correlated with the SF levels as well as the subjective evaluation sources. These data indicate that MRI is a suitable technique of documenting the presence and degree of iron overload in multiply transfused children with ESRD.