title: MRI-guided intervention for breast lesions using the freehand technique in a 3.0-T closed-bore MRI scanner: feasibility and initial results.
abstract: OBJECTIVE
  To report the feasibility of magnetic resonance imaging (MRI)-guided intervention for diagnosing suspicious breast lesions detectable by MRI only, using the freehand technique with a 3.0-T closed-bore MRI scanner.
  
  
  METHODS
  Five women with 5 consecutive MRI-only breast lesions underwent MRI-guided intervention: 3 underwent MRI-guided needle localization and 2, MRI-guided vacuum-assisted biopsy. The interventions were performed in a 3.0-T closed-bore MRI system using a dedicated phased-array breast coil with the patients in the prone position; the freehand technique was used. Technical success and histopathologic outcome were analyzed.
  
  
  RESULTS
  MRI showed that four lesions were masses (mean size, 11.5 mm; range, 7-18 mm); and 1, a nonmass-like enhancement (maximum diameter, 21 mm). The locations of the lesions with respect to the breast with index cancer were as follows: different quadrant, same breast - 3 cases; same quadrant, same breast - 1 case; and contralateral breast - 1 case. Histopathologic evaluation of the lesions treated with needle localization disclosed perilobular hemangioma, fibrocystic change, and fibroadenomatous change. The lesions treated with vacuum-assisted biopsy demonstrated a radial scar and atypical apocrine hyperplasia. Follow-up MRI after 2-7 months (mean, 4.6 months) confirmed complete lesion removal in all cases.
  
  
  CONCLUSIONS
  MRI-guided intervention for breast lesions using the freehand technique with a 3.0-T closed-bore MRI scanner is feasible and accurate for diagnosing MRI-only lesions.
authors.affiliation: Department of Radiology, Gyeongsang National University Hospital, Jinju 660-702, Korea.
authors.forename: Hye Young
authors.initials: HY
authors.lastname: Choi
authors.forename: Sun Mi
authors.initials: SM
authors.lastname: Kim
authors.forename: Mijung
authors.initials: M
authors.lastname: Jang
authors.forename: Bo La
authors.initials: BL
authors.lastname: Yun
authors.forename: Sung-Won
authors.initials: SW
authors.lastname: Kim
authors.forename: Eunyoung
authors.initials: E
authors.lastname: Kang
authors.forename: So Yeon
authors.initials: SY
authors.lastname: Park
authors.forename: Woo Kyung
authors.initials: WK
authors.lastname: Moon
authors.forename: Eun Sook
authors.initials: ES
authors.lastname: Ko
mesh_terms: D000328:Adult; D001707:Biopsy, Needle; D001943:Breast Neoplasms / Q000473:pathology*; D003287:Contrast Media; D003937:Diagnosis, Differential; D005240:Feasibility Studies; D005260:Female; D019786:Gadolinium DTPA; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000295:instrumentation*; D053783:Magnetic Resonance Imaging, Interventional / Q000379:methods*; D008875:Middle Aged; D009367:Neoplasm Staging; D012189:Retrospective Studies; D014618:Vacuum
chemical_list: D003287:Contrast Media; C064925:gadodiamide; D019786:Gadolinium DTPA
keywords: Biopsy; Breast neoplasms; Freehand technique; High field; Magnetic resonance imaging; Needle localization