نتایج جستجو برای: stereotactic biopsy
تعداد نتایج: 107922 فیلتر نتایج به سال:
Microcalcifications are an early mammographic sign of breast cancer and a target for stereotactic breast needle biopsy. We present here a Raman spectroscopic tool for detecting microcalcifications in breast tissue based on their chemical composition. We collected ex vivo Raman spectra from 159 tissue sites in fresh stereotactic breast needle biopsies from 33 patients, including 54 normal sites,...
BACKGROUND We aimed to develop a multivariable model for prediction of underestimated invasiveness in women with ductal carcinoma in situ at stereotactic large core needle biopsy, that can be used to select patients for sentinel node biopsy at primary surgery. METHODS From the literature, we selected potential preoperative predictors of underestimated invasive breast cancer. Data of patients ...
Interactive, image-guided frameless systems are currently used in many centers for navigation during open craniotomies. We report our experience in 34 cases of brain needle biopsy performed with a frameless stereotactic system based on an optical digitizer. Preoperative images were acquired after adhesive skin markers were placed on the patient's head. Biopsy planning was done on the computer m...
The aims of this review are to compare and contrast the available stereotactic equipment, and to describe the variety of needle types used and their affect on pathological results and subsequent patient management. Initial stereotactic devices were "added-on" to analogue mammography units and have been replaced by prone or ducubitus equipment using digital image acquisition. Biopsies use either...
Microcalcifications geographically target the location of abnormalities within the breast and are of critical importance in breast cancer diagnosis. However, despite stereotactic guidance, core needle biopsy fails to retrieve microcalcifications in up to 15% of patients. Here, we introduce an approach based on diffuse reflectance spectroscopy for detection of microcalcifications that focuses on...
Objective: Performing stereotactic biopsy using the Leksell system, we discuss its advantages and disadvantages and analyze our intraoperative histopathological and cytological diagnostic success rates. Methods: We present a series of 47 patients subjected to stereotactic biopsies for a wide variety of brain lesions. The anatomical locations, diagnostic yield, morbidity and mortality rates, and...
OBJECTIVE To explore the correlation between Nuclear Overhauser Enhancement (NOE)-mediated signals and tumor cellularity in glioblastoma utilizing the apparent diffusion coefficient (ADC) and cell density from histologic specimens. NOE is one type of chemical exchange saturation transfer (CEST) that originates from mobile macromolecules such as proteins and might be associated with tumor cellul...
PURPOSE Does the easier microcalcification detection (EMD) method enable sonographic visualization of microcalcifications in breast core biopsy specimens compared with mammography? MATERIALS AND METHODS In a prospective randomized study, 105 core biopsy specimens obtained with stereotactic guidance were examined by mammography and ultrasound. EMD is integrated in a high-end ultrasound system ...
BACKGROUND This work aims to add evidence and provide an update on the classification and diagnosis of monoclonal immunoglobulin deposition disease (MIDD) and primary central nervous system low-grade lymphomas. MIDD is characterized by the deposition of light and heavy chain proteins. Depending on the spatial arrangement of the secreted proteins, light chain-derived amyloidosis (AL) can be dist...
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