This paper aims to discuss the issues needed to be considered during the process of defining the registered product standards and industry standards of digital mammographic X-ray camera system. Meanwhile, for the future reference of establishment of standards, it adds the additional technical requirements not only from the features of device's structure, but also from the risk of clinical use.
Mammography ; instrumentation ; standards ; Radiographic Image Enhancement ; instrumentation

OBJECTIVE: To evaluate the efficacy for spatial resolution and radiation dose of a small-field digital mammographic imaging system using parabolic polycapillary optics. MATERIALS AND METHODS: We developed a small-field digital mammographic imaging system composed of a CCD (charge coupled device) detector and an X-ray source coupled with parabolic polycapillary optics. The spatial resolution and radiation dose according to various filters were evaluated for a small-field digital mammographic imaging system. The images of a test standard phantom and breast cancer tissue sample were obtained. RESULTS: The small-field digital mammographic imaging system had spatial resolutions of 12 lp/mm with molybdenum and rhodium filters with a 25-micrometer thickness. With a thicker molybdenum filter (100 micrometer thick), the system had a higher spatial resolution of 11 lp/mm and contrast of 0.48. The radiation dose for a rhodium filter with a 25-micrometer thickness was 0.13 mGy within a 10-mm-diameter local field. A larger field image greater than 10 mm in diameter could be obtained by scanning an object. On the small-field mammographic imaging system, microcalcifications of breast cancer tissue were clearly observed. CONCLUSION: A small-field digital mammographic imaging system with parabolic polycapillary optics may be a useful diagnostic tool for providing high-resolution imaging with a low radiation dose for examination of local volumes of breast tissue.
Equipment Design ; Humans ; Mammography/*instrumentation ; Molybdenum ; Optics and Photonics/*instrumentation ; Phantoms, Imaging ; Radiographic Image Enhancement/*instrumentation ; Rhodium

OBJECTIVE: To improve the performance quality of mammography X-ray system, and to decrease misdiagnoses. METHODS: Quality assurance was tested and controlled from such aspect as measurement of half value layer, beam quality assessment, breast entrance exposure average glandular dose, tube tunsion accuracy and reproducibility, and radiation output. RESULTS: The image contrast, mistiness and noise were optimized. CONCLUSION With the quality assurance of the digital mammography X-ray system, the variations of the performance parameters remain in the range of permission, thus improving the quality of mammography.
Humans ; Image Enhancement ; instrumentation ; Mammography ; instrumentation ; methods ; Quality Control ; Radiographic Image Enhancement ; instrumentation

This article introduces a new testing method for mammographic x-ray equipments. The films placed around the x-ray tube assembly are exposured to find the location of leakage radiation and then the accurate testing for the leakage radiation of the mammographic x-ray equipment is carried out with a radiation dosimeter.
Equipment Design ; Equipment Failure Analysis ; Female ; Humans ; Mammography ; instrumentation ; methods ; Quality Control ; Radiation Dosage ; Radiation Protection ; instrumentation ; methods ; Radiometry ; instrumentation ; methods

OBJECTIVETo evaluate three biopsy methods which are currently used in stereotactic breast biopsy.

METHODSA total of 361 cases of stereotactic breast biopsies were carried out since 2000, including 73 cases of true cut core needle biopsies (ST-CNB), 74 cases of vacuum assisted biopsies (ST-VAB) and 214 cases of excisional biopsies. After medium follow-up time of 18 months (6 to 66 months), the accuracy as well as the clinical benefits of the three stereotactic biopsy procedures were analyzed retrospectively.

RESULTSThe cancer miss rate of stereotactic wire localized excisional biopsy, ST-CNB and ST-VAB is 0, 2.7% and 0 respectively. Under-estimate rate of minimal invasive biopsy was 33% in atypical ductal hyperplasia (ADH) and 53% in ductal carcinoma in situ (DCIS). The minimal invasive procedure is superior to surgical procedure in terms of operation time, breast cosmetic outcome and complications, etc. Furthermore, 69% of the surgeries for suspicious lesion were waived.

CONCLUSIONSStereotactic minimal invasive breast biopsy, especially ST-VAB, is an accurate, safty and convenient diagnosis technique and could be considered as the first line choice for mammographic moderate suspicious breast lesions (BIRADS-4). However, further excisional biopsy is recommended for atypical hyperplasia. Stereotactic excisional biopsy could be directly used for diagnosis of mammographic highly suspicious breast lesions (BIRADS-5).

Biopsy ; methods ; Biopsy, Needle ; instrumentation ; Breast ; pathology ; Breast Diseases ; diagnostic imaging ; pathology ; Female ; Follow-Up Studies ; Humans ; Mammography ; Sensitivity and Specificity

Foreign bodies, such as surgical sponges or drains, are sometimes retained after surgical procedures.1 Retention of a drain in the breast tissue postoperatively is an unusual complication. This report describes two cases of characteristic sonographic findings related to retained silastic drains following breast surgery.
*Ultrasonography, Mammary ; Silicones ; Postoperative Complications/*diagnosis/radiography/ultrasonography ; *Mammography ; Humans ; Foreign Bodies/*diagnosis/radiography/ultrasonography ; Female ; Drainage/*instrumentation ; Dimethylpolysiloxanes ; Adult

In this paper, the focus of technical review of the registration application data of digital Breast Tomosynthesis Mammography System was sorted out, so as to provide reference for researchers and manufacturers in China when applying for registration and preparation of such products.
Breast ; diagnostic imaging ; Breast Neoplasms ; diagnostic imaging ; China ; Humans ; Mammography ; instrumentation ; standards ; Radiographic Image Enhancement ; standards ; Risk Factors

Adult ; Biopsy, Needle ; instrumentation ; methods ; Breast Neoplasms ; surgery ; Female ; Humans ; Male ; Mammography ; Mastectomy, Segmental ; methods ; Middle Aged ; Vacuum

OBJECTIVETo compare the effectiveness of full-field digital mammography (FFDM) and magnetic resonance imaging (MRI) in the detection and diagnosis of breast diseases.

METHODSForty-one patients with 47 breast lesions (20 malignant and 27 benign lesions) underwent preoperative FFDM and MRI, using the pulse sequences including T1WI, T2WI, T2WI/SPIR diffusion-weighted imaging (DWl), and 3D dynamic contrast-enhanced MRI.

RESULTSThe imaging and pathological findings were compared, and the detection rates of the lesions by FFDM and MRI were 97.87% (46/47) and 74.46% (35/47), respectively (P<0.01). The sensitivity of FFDM and MRI was 70.00% (14/20) and 80.00% (16/20) (P>0.05), with specificity of 62.96%(17/27) and 88.89%(24/27) (P<0.05), respectively.

CONCLUSIONMRI is superior to FFDM in the detection and diagnosis of breast diseases.

Adenoma ; diagnosis ; Adult ; Breast Neoplasms ; diagnosis ; Carcinoma, Ductal, Breast ; diagnosis ; Female ; Humans ; Magnetic Resonance Imaging ; Mammography ; instrumentation ; methods ; Middle Aged ; Radiographic Image Enhancement ; Sensitivity and Specificity ; Young Adult

A simple imaging setup based on the principle of coherence-based contrast X-ray imaging with unmonochromatized synchrotron radiation was used for studying mammographic phantom and human breast specimens. The use of unmonochromatized synchrotron radiation simplifies the instrumentation, decreases the cost and makes the procedure simpler and potentially more suitable for clinical applications. The imaging systems consisted of changeable silicon wafer attenuators, a tungsten slit system, a CdWO4 scintillator screen, a CCD (Charge Coupled Device) camera coupled to optical magnification lenses, and a personal computer. In preliminary studies, a spatial resolution test pattern and glass capillary filled with air bubbles were imaged to evaluate the resOolution characteristics and coherence-based contrast enhancement. Both the spatial resolution and image quality of the proposed system were compared with those of a conventional mammography system in order to establish the characteristic advantages of this approach. The images obtained with the proposed system showed a resolution of at least 25micrometer on the test pattern with much better contrast, while the images of the capillary filled with air bubbles revealed coherence-based edge enhancement. This result shows that the coherence-based contrast imaging system, which emphasizes the refraction effect from the edge of materials of different refractive indexes, is applicable to imaging studies in fundamental medicine and biology, although further research works will be required before it can be used for clinical applications.
Breast Diseases/*radiography ; Comparative Study ; Female ; Humans ; Mammography/*instrumentation/*methods ; *Phantoms, Imaging ; Pilot Projects ; Research Support, Non-U.S. Gov't ; *Synchrotrons ; X-Rays