Korean Journal of Radiology

The Korean Society of Radiology (대한영상의학회)
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Differential Subsampling with Cartesian Ordering Contrast-Enhanced Magnetic Resonance Angiography for the Preoperative Assessment of Anterolateral Thigh Flap

  • Yunfeng Shen (Department of Radiology, The Second Hospital of Shandong University, Cheeloo Colleage of Medicine) ;
  • Xiucun Li (Department of Hand and Foot Surgery, The Second Hospital of Shandong University, Cheeloo Colleage of Medicine) ;
  • Chao Zhang (Department of Radiology, The Second Hospital of Shandong University, Cheeloo Colleage of Medicine) ;
  • Hai Zhong (Department of Radiology, The Second Hospital of Shandong University, Cheeloo Colleage of Medicine) ;
  • Weiqiang Dou (MR Research China, GE Healthcare)
  • Received : 2021.09.20
  • Accepted : 2022.04.21
  • Published : 2022.08.01
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Abstract

Objective: To investigate the clinical application of differential subsampling with Cartesian ordering (DISCO) contrast-enhanced (CE) magnetic resonance angiography for anterolateral thigh (ALT) flap transplantation, using operative findings as a reference. Materials and Methods: Thirty patients (21 males and nine females; mean age ± standard deviation, 45.5 ± 15.6 years) who were scheduled to undergo reconstruction with ALT flaps between June 2020 and June 2021 were included in the prospective study. Before ALT flap transplantation, patients were scanned using CE-DISCO imaging. All acquired DISCO images of the 60 lower limbs (both sides from each patient) were analyzed using maximum intensity projection and volume rendering methods. Two experienced radiologists were employed to examine the patterns of the lateral circumflex femoral artery (LCFA), its branches, and perforators and their skin termini, which were compared with the operative findings. Results: Using CE-DISCO, the patterns of the LCFA and its branches were clearly identified in all patients. Four different origins of the LCFA were found among the 60 blood vessels: type I (44/60, 73.3%), type II (6/60, 10.0%), type III (8/60, 13.3%), and type IV (2/60, 3.3%). Owing to a lack of perforators entering the skin, two patients did not undergo ALT flap transplantation. For the remaining 28 patients, the ALT flaps in 26 patients were successfully operated without flap reselection during the operation, while the remaining two patients underwent other surgical procedures due to the thin diameter of the perforator or injury of the perforator during the operation. The success rate of flap transplantation was 92.8% (26/28). All transplanted flaps exhibited good blood supply and achieved primary healing without infection or delayed healing. Conclusion: CE-DISCO imaging can be an effective method for preoperative perforator imaging before ALT flap transplantation.

Keywords

Acknowledgement

This work was supported by China Health Promotion Foundation (XM_2020_011_0295_01).

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