| |||
Biopsy Device (biopsy + device)
Selected AbstractsMR-guided percutaneous core biopsy of small breast lesions: First experience with a vertically open 0.5T scannerJOURNAL OF MAGNETIC RESONANCE IMAGING, Issue 4 2002Jens P. Schneider MD Abstract Purpose The growing use of highly sensitive but only moderate specific breast MRI requires the development of both minimal-invasive as well as precise biopsy systems. The aim of the study was to prove the accuracy and feasibility of a biopsy procedure carried out in prone position in a vertically opened MR imager. Materials and Methods The biopsies were carried out in 21 women with lesions visible on MRI alone using an open breast coil with an integrated biopsy device. A 14 G coaxial needle was placed under near real-time MRI-guidance. After the tip of this needle was verified in contact with the lesion, we used a non MR-compatible, but MR-safe biopsy gun with a 16 G canula to take four to eight cores. Results We found eight malignant and 12 benign lesions. In one patient the procedure was not successful. In case of malignancy, the operation confirmed the diagnosis in all cases. The 12/21 patients with benign lesions have been followed without evidence of lesions growth over eight to 28 months. Conclusion The described procedure allows MRI-guided minimal invasive core biopsy of small breast lesions (five to 17 mm) with a high degree of accuracy. J. Magn. Reson. Imaging 2002;15:374-385. © 2002 Wiley-Liss, Inc. [source] Automatic passive tracking of an endorectal prostate biopsy device using phase-only cross-correlationMAGNETIC RESONANCE IN MEDICINE, Issue 5 2008André de Oliveira Abstract MR-guided transrectal prostate biopsy is currently a time-consuming procedure because the imaging slice is often manually realigned with the biopsy needle during lesion targeting. In this work a pulse sequence is presented that automatically follows a passive marker attached to a dedicated MR biopsy device holder, thus providing an alternative to existing active tracking methods. In two orthogonal tracking FLASH images of the marker the position of the needle axis is automatically identified using a phase-only cross-correlation (POCC) algorithm. The position information is then used to realign a trueFISP imaging slice in real time. In phantom experiments the sensitivity of this technique to initial misalignments of the marker and to the signal-to-noise ratio was evaluated. In several puncture experiments the precision of the needle placement was analyzed. The POCC algorithm allowed for a precise identification of the marker in the images even under severe initial misalignments of up to 45°. At a frame rate 1 image/s a precision of the needle placement of 1.5 ± 1.1 mm could be achieved. Magn Reson Med 59:1043,1050, 2008. © 2008 Wiley-Liss, Inc. [source] Review of 125 SiteSelect Stereotactic Large-Core Breast Biopsy ProceduresTHE BREAST JOURNAL, Issue 3 2003Christa C. Corn MD Abstract: Advances in stereotactic breast biopsies have introduced a variety of devices that yield different sizes of tissue samples. The choice of biopsy device should be based on which technique is most likely to yield a definitive diagnosis at the time of the initial biopsy. This is a prospective study of 104 patients who underwent a total of 125 stereotactic breast biopsies using the SiteSelect large-core biopsy device. From May 1999 to June 2001, 104 patients underwent 125 stereotactic breast biopsies with the SiteSelect large-core biopsy device. One hundred four 15 mm SiteSelect biopsies, eighteen 10 mm SiteSelect biopsies, and three 22 mm SiteSelect biopsies were performed. Atypical ductal hyperplasia (ADH) and ductal carcinoma in situ (DCIS) were found in 15% of the biopsies and infiltrating cancer was found in another 15% of the biopsies. Seventy-eight percent of the ADH and 90% of the DCIS lesions were associated with indeterminate calcifications noted on mammogram. Two of the 22 mm SiteSelect excisions yielded a specimen that contained the entire cancer with clear surgical margins. All of the patients with DCIS or invasive carcinoma underwent definitive surgical and adjuvant therapy. The sensitivity and specificity of SiteSelect in this series of patients was 100%. The SiteSelect biopsy procedure is safe, well tolerated by patients, and can be performed under local anesthesia. SiteSelect is comparable to an open excisional biopsy in its ability to obtain adequate tissue for accurate diagnosis, but excises significantly less normal surrounding breast tissue. Based on the data, indications for primary use of SiteSelect are indeterminate calcifications on mammogram, rebiopsy of a vacuum-assisted biopsy site that yielded atypia on pathologic examination, and complete excision of a lesion suspicious for invasive carcinoma in order to assess actual size and margin status. [source] Long-term results after excision of breast mass using a vacuum-assisted biopsy deviceANZ JOURNAL OF SURGERY, Issue 11 2009Cha Kyong Yom Abstract Background:, The excision of breast lesions using an ultrasound-guided vacuum-assisted biopsy device (VABD) is a widely used technique for the diagnosis and treatment of breast disease, but the results of long-term follow-up after VABD excision of benign breast tumours have not been reported. The purpose of this study was to evaluate the results of long-term follow-up after complete excision of benign breast tumours using an ultrasound-guided VABD. Methods:, This is a retrospective clinical study. Between January 2001 and December 2004, patients who had undergone VABD excision of benign breast tumours and been followed up by clinical examination and ultrasonography for 2 years or more were included. Results:, One hundred eighty-four cases representing 153 patients were studied. The median follow-up period was 33 months (range, 24,67 months). All lesions were histologically benign. The mean size of the lesions was 1.09 ± 0.57 cm (range, 0.3,3.03 cm). Within 2 years after VABD excision, residual lesions were detected in 10% of patients sonographically, but after 2 years or more, residual masses were found in 6.5% of patients. Scar changes also decreased from 36.0% to 15.8% during the period of follow-up. Finally, the benign breast tumours were completely excised without residual masses in 93.5% of the participant patients. Residual masses developed in two fibroadenoma cases (1.08%); one was re-excised and the other was followed serially. Conclusion:, Ultrasound-guided VABD excision is a minimally invasive technique for the complete removal of benign breast tumours. The results of this long-term follow-up of VABD excisions are comparable to conventional methods. [source] Application of image-guided biopsy for impalpable breast lesions in Chinese womenANZ JOURNAL OF SURGERY, Issue 1-2 2003Flora H. F. Tsang Background: Screening for breast cancer has resulted in an increasing number of mammographically detected lesions that require further management. The Advanced Breast Biopsy Instrumentation system is a recently added biopsy technique for the management of such lesions. The present paper will review the authors' experience in the use of this procedure in Chinese patients whose breast volume was smaller than that of Caucasians. Methods: Ninety-three patients were listed for the procedure and 78 (84%) underwent the procedure successfully. Ninety-two lesions were biopsied. Advanced Breast Biopsy Instrumentation (ABBI) was performed for clustered microcalcifications or abnormal mass/density. Minimally Invasive Breast Biopsy (MIBB), a suction-assisted core biopsy device, was employed for more scattered lesions. For small volume breasts, it may be required to bring the hand through the aperture to get the targeted lesions onto the digital image or, in the case of ABBI, to excise just beyond the deep margin of the lesion rather than the recommended depth. Results: The ABBI was performed for 43 (46.7%) lesions and MIBB for 49 (53.3%) lesions. Nine (9.8%) were diagnosed to have ductal carcinoma in situ, two (2.2%) had ductal carcinoma in situ with microinvasion and eight (8.7%) had invasive ductal carcinoma. All the malignant lesions required further management. In addition, 19 (20.7%) were found to have atypical hyperplasia. Patients' satisfaction and cosmetic outcome are good. Conclusion: The ABBI and MIBB procedures can be applied satisfactorily for biopsy of mammographic lesions with good cosmetic outcome in Chinese patients. [source] Stereotactic-Guided Excisional Biopsy: A New Technique for Very Thin BreastsTHE BREAST JOURNAL, Issue 6 2006Maria L. Diaz MD Abstract:, Stereotactic biopsies are widely used for the diagnosis of breast lesions. Most biopsy devices require breast thickness of at least 25,30 mm with compression. We describe an alternative technique in order to perform excisional stereotactic-guided biopsies for very thin breasts using the prone stereotactic table. In the outpatient setting and with local anesthesia, this procedure can be performed by a radiologist, a surgeon, and a nurse. After conventional stereotactic localization, a fine needle is placed at the site of the lesion. Once the point is marked with a skin marker, a 25G × 16 mm needle is introduced. Then, a couple of stereotactic views are taken to confirm the correct position of the needle. Later, the surgeon excises the lesion guided by the needle. Additional radiographs of the specimen and the remaining breast tissue are obtained to ensure the accuracy of the procedure. [source] |