
Abstract Objective To evaluate the feasibility of in-vivo quantitative susceptibility mapping (QSM) of the human kidney. Methods An axial single-breath-hold 3D multi-echo sequence (acquisition time 33 s) was completed on a 3 T-MRI-scanner (Magnetom Prisma, Siemens Healthineers, Erlangen, Germany) in 19 healthy volunteers. Graph-cut-based unwrapping combined with the T2*-IDEAL approach was performed to remove the chemical shift of fat and to quantify QSM of the upper abdomen. Mean susceptibility values of the entire, renal cortex and medulla in both kidneys and the liver were determined and compared. Five subjects were measured twice to examine the reproducibility. One patient with severe renal fibrosis was included in the study to evaluate the potential clinical relevance of QSM. Results QSM was successful in 17 volunteers and the patient with renal fibrosis. Anatomical structures in the abdomen were clearly distinguishable by QSM and the susceptibility values obtained in the liver were comparable to those found in the literature. The results showed a good reproducibility. Besides, the mean renal QSM values obtained in healthy volunteers (0.04 ± 0.07 ppm for the right and − 0.06 ± 0.19 ppm for the left kidney) were substantially higher than that measured in the investigated fibrotic kidney (− 0.43 ± − 0.02 ppm). Conclusion QSM of the human kidney could be a promising approach for the assessment of information about microscopic renal tissue structure. Therefore, it might further improve functional renal MR imaging.
Liver, Magnetic Resonance Imaging [MeSH] ; Reproducibility of Results [MeSH] ; Liver [MeSH] ; Humans [MeSH] ; Quantitative susceptibility mapping ; Renal MRI ; Basic Science - Parametric mapping and quantitative MRI ; Kidney [MeSH] ; Functional renal imaging ; Research Article ; Feasibility Studies [MeSH], Feasibility Studies, Humans, Reproducibility of Results, Kidney, Magnetic Resonance Imaging, Research Article
Liver, Magnetic Resonance Imaging [MeSH] ; Reproducibility of Results [MeSH] ; Liver [MeSH] ; Humans [MeSH] ; Quantitative susceptibility mapping ; Renal MRI ; Basic Science - Parametric mapping and quantitative MRI ; Kidney [MeSH] ; Functional renal imaging ; Research Article ; Feasibility Studies [MeSH], Feasibility Studies, Humans, Reproducibility of Results, Kidney, Magnetic Resonance Imaging, Research Article
| selected citations These citations are derived from selected sources. This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | 13 | |
| popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network. | Top 10% | |
| influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | Average | |
| impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network. | Top 10% |
