title: Preoperative imaging for DIEA perforator flaps: a comparative study of computed tomographic angiography and Doppler ultrasound.
abstract: BACKGROUND
  Abdominal donor-site flaps, including the transverse rectus abdominis musculocutaneous (TRAM) and deep inferior epigastric artery (DIEA) perforator flaps, are standard in autologous breast reconstruction. With significant variation in the vascular anatomy of the abdominal wall, preoperative imaging is essential for preoperative planning and reducing intraoperative error. Doppler and color duplex sonography have been used with varying results, and the quest continues for optimal preoperative assessment. Computed tomographic angiography has recently been proposed as a noninvasive modality for this purpose. This is the first study to formally compare preoperative Doppler ultrasound with computed tomographic angiography for imaging the DIEA.
  
  
  METHODS
  Eight consecutive patients undergoing DIEA perforator flap surgery for breast reconstruction underwent both computed tomographic angiography and Doppler ultrasound preoperatively. All investigations and procedures were performed at the same institution with the same primary and assisting surgeons and the same radiology team.
  
  
  RESULTS
  Computed tomographic angiography was superior to Doppler ultrasound at identifying the course of the DIEA and its branching pattern, and in visualizing its perforators. Preoperative computed tomographic angiography was highly specific (100 percent) and more sensitive in mapping and visualizing perforators (p = 0.0078). It was also proficient at identifying the superficial epigastric arterial system and for effectively displaying the results intraoperatively. It was substantially quicker and removed the interobserver error associated with Doppler ultrasonography. The study was ceased after eight patients because of the overwhelming benefit of computed tomographic angiography over Doppler ultrasonography.
  
  
  CONCLUSIONS
  Computed tomographic angiography is a valuable imaging modality for the preoperative assessment of the donor-site vascular supply for TRAM and DIEA perforator flaps.
authors.affiliation: Parkville, Victoria, Australia From the Jack Brockhoff Reconstructive Plastic Surgery Research Unit, University of Melbourne, and Department of Radiology, Royal Melbourne Hospital.
authors.forename: Warren M
authors.initials: WM
authors.lastname: Rozen
authors.forename: Timothy J
authors.initials: TJ
authors.lastname: Phillips
authors.forename: Mark W
authors.initials: MW
authors.lastname: Ashton
authors.forename: Damien L
authors.initials: DL
authors.lastname: Stella
authors.forename: Robert N
authors.initials: RN
authors.lastname: Gibson
authors.forename: G Ian
authors.initials: GI
authors.lastname: Taylor
mesh_terms: D034861:Abdominal Wall / Q000098:blood supply*; D000328:Adult; D000792:Angiography; D019074:Epigastric Arteries / Q000033:anatomy & histology; D005260:Female; D006801:Humans; D016462:Mammaplasty; D008875:Middle Aged; D011300:Preoperative Care; D012039:Regional Blood Flow; D013524:Surgical Flaps / Q000098:blood supply*; D020858:Tissue and Organ Harvesting; D014057:Tomography, X-Ray Computed; D018608:Ultrasonography, Doppler