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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.

Materials and 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.

Conclusion: 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.

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An engineering view on megatrends in radiology: digitization to quantitative tools of medicine Namkug Kim, Jaesoon Choi, Jaeyoun Yi, Seungwook Choi, Seyoun Park, Yongjun Chang, Joon Beom Seo pp.139-153

Radiologists' performance for detecting lesions and the interobserver variability of automated whole breast ultrasound Sung Hun Kim, Bong Joo Kang, Byung Gil Choi, Jae Jung Choi, Ji Hye Lee, Byung Joo Song, Byung Joo Choe, Sarah Park, Hyunbin Kim pp.154-163

Comparison of new and established full-field digital mammography systems in diagnostic performance Eun Sook Ko, Boo-Kyung Han, Sun Mi Kim, Eun Young Ko, Mijung Jang, Chae Yeon Lyou, Jung Min Chang, Woo Kyung Moon, Rock Bum Kim pp.164-170

MRI-guided intervention for breast lesions using the freehand technique in a 3.0-T closed-bore MRI scanner : feasibility and initial results Hye Young Choi, Sun Mi Kim, Mijung Jang, Bo La Yun, Sung-Won Kim, Eunyoung Kang, So Yeon Park, Woo Kyung Moon, Eun Sook Ko pp.171-178

The unusual ultrasound features of a breast cholesterol granuloma manifesting as an intracystic mass: case report and literature review Hye Shin Ahn, Sun Mi Kim, Bo La Yun, Mi Sun Kim, Mijung Jang, So Yeon Park, Sung-Won Kim, Eunyoung Kang, Hye Young Choi pp.179-182

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^125^I brachytherapy seeds implantation for inoperable low-grade leiomyosarcoma of inferior vena cava Yuliang Li, Yongzheng Wang, Bin Liu, Zheng Li, Wujie Wang pp.278-282

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Accuracy of preoperative MRI with microscopy coil in evaluation of primary tumor thickness of malignant melanoma of the skin with histopathologic correlation Yusuhn Kang, Jung-Ah Choi, Jin-Haeng Chung, Sung Hwan Hong, Heung Sik Kang pp.287-293

Cavernous hemangioma of the ilium mimicking aggressive malignant bone tumor with increased activity on ^18^F-FDG PET/CT Seog Wan Ko, Jin Gyoon Park pp.294-298

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Acute hepatic encephalopathy presenting as cortical laminar necrosis : case report Jong Mun Choi, Yoon Hee Kim, Sook Young Roh pp.324-328

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