Functional MRI evaluation of blood oxygen dependent (BOLD) in renal allograft dysfunction: a prospective study.
Acta Radiol
; 65(5): 397-405, 2024 May.
Article
en En
| MEDLINE
| ID: mdl-38146146
ABSTRACT
BACKGROUND:
Blood oxygen level dependent-magnetic resonance imaging (BOLD-MRI) is a non-invasive functional imaging technique that can be used to assess renal allograft dysfunction.PURPOSE:
To evaluate the diagnostic performance of BOLD-MRI using a 3-T scanner in discriminating causes of renal allograft dysfunction in the post-transplant period. MATERIAL ANDMETHODS:
This prospective study was conducted on 112 live donor-renal allograft recipients 53 with normal graft function, as controls; 18 with biopsy-proven acute rejection (AR); and 41 with biopsy-proven acute tubular necrosis (ATN). Multiple fast-field echo sequences were performed to obtain T2*-weighted images. Cortical R2* (CR2*) level, medullary R2* (MR2*) level, and medullary over cortical R2* ratio (MCR) were measured in all participants.RESULTS:
The mean MR2* level was significantly lower in the AR group (20.8 ± 2.8/s) compared to the normal group (24 ± 2.4/s, P <0.001) and ATN group (27.4 ± 1.7/s, P <0.001). The MCR was higher in ATN group (1.47 ± 0.18) compared to the AR group (1.18 ± 0.17) and normal functioning group (1.34 ± 0.2). Both MR2* (area under the curve [AUC] = 0.837, P <0.001) and MCR (AUC = 0.727, P = 0.003) can accurately discriminate ATN from AR, however CR2* (AUC = 0.590, P = 0.237) showed no significant difference between both groups.CONCLUSION:
In early post-transplant renal dysfunction, BOLD-MRI is a valuable non-invasive diagnostic technique that can differentiate between AR and ATN by measuring changes in intra-renal tissue oxygenation.Palabras clave
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Oxígeno
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Imagen por Resonancia Magnética
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Trasplante de Riñón
Límite:
Adult
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Female
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Humans
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Male
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Middle aged
Idioma:
En
Revista:
Acta Radiol
Año:
2024
Tipo del documento:
Article
País de afiliación:
Egipto