Related Experiment Videos
Vascular complications of pancreatic transplantation: MR evaluation
1Department of Radiology, University of Maryland Medical Center, Baltimore 21201, USA.
Purpose:
To determine the value of magnetic resonance (MR) angiography and MR imaging with dynamic gadopentetate dimeglumine-enhanced gradient-echo (Gd-GRE) sequences in detection of vascular complications of pancreatic transplantation.
Materials And Methods:
Three radiologists evaluated findings of 32 MR examinations in 20 adult patients who underwent pancreatic transplantation. The images were obtained with a surface coil and T1-weighted and T2-weighted fast spin-echo sequences, Gd-GRE sequences, and MR angiography. Vascular abnormality was confirmed at surgery or biopsy, and vascular patency with clinical correlation.
Results:
Absence of flow was found in six of 32 studies (19%): acute vascular thrombosis of the vascular pedicle and/or branch vessels in four studies (three patients) and chronic pancreatic rejection in two studies (one patient). Gd-GRE images helped identify infarction in two patients. The sensitivity of MR angiography for detection of acute vascular compromise was 100%, and the specificity was 93%.
Conclusion:
MR angiography and MR imaging with Gd-GRE sequences allow detection of vascular complications of pancreatic transplantation.
Insights
Magnetic resonance (MR) angiography and dynamic gadolinium-enhanced MR imaging effectively detect vascular complications after pancreatic transplantation. These advanced MR techniques are valuable for identifying issues like thrombosis and rejection, ensuring better patient outcomes.
Area of Science:
- Radiology
- Medical Imaging
- Transplant Surgery
Background:
- Pancreatic transplantation is a complex procedure with potential vascular complications.
- Early detection of vascular issues is crucial for graft survival and patient health.
Purpose of the Study:
- To evaluate the diagnostic performance of MR angiography and dynamic gadolinium-enhanced gradient-echo (Gd-GRE) MR imaging.
- To assess the utility of these MR techniques in identifying vascular complications following pancreatic transplantation.
Main Methods:
- Retrospective review of 32 MR examinations in 20 adult patients who underwent pancreatic transplantation.
- Utilized surface coil, T1/T2-weighted fast spin-echo, Gd-GRE, and MR angiography sequences.
- Vascular abnormalities confirmed by surgery or biopsy; patency assessed with clinical correlation.
Main Results:
- MR angiography demonstrated 100% sensitivity and 93% specificity for acute vascular compromise.
- Six studies (19%) showed absence of flow, including four cases of acute vascular thrombosis and two of chronic rejection.
- Gd-GRE sequences aided in identifying infarction in two patients.
Conclusions:
- MR angiography and Gd-GRE MR imaging are effective tools for detecting vascular complications in pancreatic transplant recipients.
- These MR techniques aid in the diagnosis of thrombosis, rejection, and infarction, supporting clinical management.