Related Experiment Video
Updated: Jun 25, 2025
Endovascular Perforation Model for Subarachnoid Hemorrhage Combined with Magnetic Resonance Imaging MRI
Published on: December 16, 2021
Identification of peroneal artery perforators using non-contrast-enhanced T2prep multi-shot gradient echo planar
Yutaka Shigenaga1, Takeo Osaki2, Nobuyuki Murai2
1Department of Radiology, Hyogo Cancer Center, Hyogo, Japan.
Abstract:
The purpose of this study was to investigate the spatial resolution of non-contrast-enhanced (CE) T2prep multi-shot gradient echo planar imaging (MSG-EPI) magnetic resonance angiography (MRA) required to identify peroneal artery perforators and demonstrate its effectiveness in preoperative simulation. Twenty-six legs of 13 volunteers were scanned using non-CE T2prep MSG-EPI-MRA at three spatial resolutions: 1.0-, 0.8-, and 0.6-mm isotropic voxels. The location and number of peroneal artery perforators that could be candidates for free fibula flaps were identified by consensus among three plastic surgeons. Surgeons distinguished between septocutaneous and musculocutaneous perforators using MRA, and confirmed the accuracy of their presence and identification using ultrasonography (US). The ability to detect hypoplasia or stenosis of the anterior tibial, posterior tibial, and peroneal arteries was evaluated by confirming the consistency between the MRA and US results. The number of cutaneous perforators identified using MRA and confirmed using US was 39, 51, and 52 at each respective resolution. The discrimination accuracies between septocutaneous and musculocutaneous perforators were 92.3%, 96.1%, and 96.2%. The number of identified septocutaneous perforators was 1.3 ± 0.6, 1.6 ± 0.8, and 1.7 ± 0.8 at 1.0-, 0.8-, and 0.6-mm data, respectively. All the MRA results, including hypoplasia and stenosis, were consistent with the US results. Non-CE T2prep MSG-EPI-MRA with a spatial resolution of 0.8 mm or less shows promise for identifying septocutaneous perforators of the peroneal artery, suggesting its potential as an alternative to conventional imaging methods for the preoperative planning of free fibula osteocutaneous flap transfers.
Insights
Non-contrast enhanced magnetic resonance angiography (MRA) at 0.8 mm resolution effectively identifies peroneal artery perforators for free fibula flaps. This technique shows promise as a preoperative planning alternative to conventional imaging.
Area of Science:
- Medical Imaging
- Radiology
- Plastic Surgery
Background:
- Free fibula osteocutaneous flap transfers are crucial in reconstructive surgery.
- Accurate preoperative identification of peroneal artery perforators is essential for flap success.
- Conventional imaging methods may have limitations in visualizing these small perforators.
Purpose of the Study:
- To determine the optimal spatial resolution of non-contrast-enhanced T2prep multi-shot gradient echo planar imaging (MSG-EPI) magnetic resonance angiography (MRA) for identifying peroneal artery perforators.
- To assess the effectiveness of this MRA technique in preoperative simulation for free fibula flap planning.
Main Methods:
- Non-contrast-enhanced T2prep MSG-EPI-MRA scans were performed on 26 legs of 13 volunteers at 1.0-, 0.8-, and 0.6-mm isotropic voxel resolutions.
- Three plastic surgeons identified and classified peroneal artery perforators (septocutaneous vs. musculocutaneous).
- MRA findings were validated using ultrasonography (US) and assessed for consistency in detecting arterial anomalies like hypoplasia or stenosis.
Main Results:
- Higher spatial resolutions (0.8 mm and 0.6 mm) significantly improved the identification and discrimination accuracy of septocutaneous perforators compared to 1.0 mm.
- Discrimination accuracies between septocutaneous and musculocutaneous perforators reached 96.2% at 0.6 mm resolution.
- MRA results for arterial patency (hypoplasia/stenosis) were consistent with US findings across all resolutions.
Conclusions:
- Non-contrast-enhanced T2prep MSG-EPI-MRA with a spatial resolution of 0.8 mm or less is effective for identifying peroneal artery septocutaneous perforators.
- This MRA technique demonstrates potential as a valuable, non-invasive alternative for preoperative planning of free fibula osteocutaneous flap transfers.
- Improved visualization aids in surgical decision-making and potentially enhances flap outcomes.
