Storage phosphor-based digital mammography using a low-dose x-ray system optimized for screen-film mammography

1996 ◽  
Author(s):  
Robert J. Jennings ◽  
Hamid Jafroudi ◽  
Robert M. Gagne ◽  
Thomas R. Fewell ◽  
P. W. Quinn ◽  
...  
Keyword(s):  
Digital Mammography ◽  
Low Dose ◽  
Storage Phosphor ◽  
X Ray

scholarly journals High Energy Resolution Hyperspectral X-Ray Imaging for Low-Dose Contrast-Enhanced Digital Mammography

2017 ◽  
Vol 36 (9) ◽  
pp. 1784-1795 ◽  
Author(s):  
Silvia Pani ◽  
Sarene C. Saifuddin ◽  
Filipa I.M. Ferreira ◽  
Nicholas Henthorn ◽  
Paul Seller ◽  
...  
Keyword(s):  
Energy Resolution ◽  
Digital Mammography ◽  
Low Dose ◽  
High Energy ◽  
High Energy Resolution ◽  
X Ray ◽  
X Ray Imaging ◽  
Contrast Enhanced

Breast tomosynthesis: Accuracy of tumor measurement compared with digital mammography and ultrasonography

2010 ◽  
Vol 51 (3) ◽  
pp. 240-247 ◽  
Author(s):  
Daniel Förnvik ◽  
Sophia Zackrisson ◽  
Otto Ljungberg ◽  
Tony Svahn ◽  
Pontus Timberg ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Digital Mammography ◽  
Tumor Size ◽  
Low Dose ◽  
Breast Cancers ◽  
Breast Tomosynthesis ◽  
X Ray ◽  
X Ray Imaging ◽  
Image Volume ◽  
Better Than

Background: Mammographic tumor size measurement can be difficult because breast structures are superimposed onto a two-dimensional (2D) plane, potentially obscuring the tumor outline. Breast tomosynthesis (BT) is a 3D X-ray imaging technique in which low-dose images are acquired over a limited angular range at a total dose comparable to digital mammography (DM). These low-dose images are used to mathematically reconstruct a 3D image volume of the breast, thus reducing the problem of superimposed tissue. Purpose: To investigate whether breast cancer size can be more accurately assessed with breast tomosynthesis than with digital mammography and ultrasonography (US), by reducing the disturbance effect of the projected anatomy. Material and Methods: A prototype BT system was used. The main inclusion criterion for BT examination was subtle but suspicious findings of breast cancer on 2D mammography. Sixty-two women with 73 breast cancers were included. BT, DM, and US sizes were measured independently by experienced radiologists without knowledge of the pathology results, which were used as reference. Results: The tumor outline could be determined in significantly more cases with BT (63) and US (60) than DM (49). BT and US size correlated well with pathology ( R=0.86 and R=0.85, respectively), and significantly better than DM size ( R=0.71). Accordingly, staging was significantly more accurate with BT than with DM. Conclusion: The study indicates that BT is superior to DM in the assessment of breast tumor size and stage.

SU-FF-I-97: Feasibility of Low Dose X-Ray Contrast Enhanced Digital Mammography with Gold Nanoparticles

2007 ◽  
Vol 34 (6Part4) ◽  
pp. 2360-2360 ◽  
Author(s):  
S Suryanarayanan ◽  
I Sechopoulos ◽  
S Vedantham ◽  
A Karellas
Keyword(s):  
Gold Nanoparticles ◽  
Digital Mammography ◽  
Low Dose ◽  
X Ray ◽  
Contrast Enhanced

Estimation of the noise in TEM image recorded on “imaging plate”

1987 ◽  
Vol 45 ◽  
pp. 748-749
Author(s):  
T. Oikawa ◽  
N. Mori ◽  
T. Katoh ◽  
Y. Harada ◽  
J. Miyahara ◽  
...  
Keyword(s):  
Low Dose ◽  
Quantum Noise ◽  
Laser Light ◽  
Imaging Plate ◽  
Total System ◽  
Electron Dose ◽  
X Ray ◽  
Image Recording ◽  
Recording Material ◽  
Highly Sensitive

The “Imaging Plate”(IP) is a highly sensitive image recording plate for X-ray radiography. It has been ascertained that the IP has superior properties and high practicability as an image recording material in a TEM. The sensitivity, one of the properties, is about 3 orders higher than that of conventional photo film. The IP is expected to be applied to low dose techniques. In this paper, an estimation of the quantum noise on the TEM image which appears in case of low electron dose on the IP is reported.In this experiment, the JEM-2000FX TEM and an IP having the same size as photo film were used.Figure 1 shows the schematic diagram of the total system including the TEM used in this experiment. In the reader, He-Ne laser light is scanned across the IP, then blue light is emitted from the IP.

Interactive multiple area spectrum integration (MASI)

1994 ◽  
Vol 52 ◽  
pp. 942-943
Author(s):  
John A. Hunt ◽  
Richard D. Leapman ◽  
David B. Williams
Keyword(s):  
Image Processing ◽  
Low Dose ◽  
Routine Analysis ◽  
Reference Image ◽  
Area Spectrum ◽  
List Type ◽  
Type Number ◽  
Image Processor ◽  
X Ray ◽  
Scanning Path

Interactive MASI involves controlling the raster of a STEM or SEM probe to areas predefined byan integration mask which is formed by image processing, drawing or selecting regions manually. EELS, x-ray, or other spectra are then acquired while the probe is scanning over the areas defined by the integration mask. The technique has several advantages: (1) Low-dose spectra can be acquired by averaging the dose over a great many similar features. (2) MASI can eliminate the risks of spatial under- or over-sampling of multiple, complicated, and irregularly shaped objects. (3) MASI is an extremely rapid and convenient way to record spectra for routine analysis. The technique is performed as follows:Acquire reference imageOptionally blank beam for beam-sensitive specimensUse image processor to select integration mask from reference imageCalculate scanning path for probeUnblank probe (if blanked)Correct for specimen drift since reference image acquisition

Factors in Photographic Emulsions for Low Dose Electron Crystallography

1980 ◽  
Vol 38 ◽  
pp. 230-231
Author(s):  
T.W. Jeng ◽  
W. Chiu
Keyword(s):  
Radiation Damage ◽  
Low Dose ◽  
Damage Effect ◽  
Photographic Emulsion ◽  
Electron Crystallography ◽  
Electron Microscopic ◽  
X Ray ◽  
Signal Contrast ◽  
Diffraction Patterns ◽  
Photographic Emulsions

With the advances in preparing biological materials in a thin and highly ordered form, and in maintaining them hydrated under vacuum, electron crystallography has become an important tool for biological structure investigation at high resolution (1,2). However, the electron radiation damage would limit the capability of recording reflections with low intensities in an electron diffraction pattern. It has been demonstrated that the use of a low temperature stage can reduce the radiation damage effect and that one can expose the specimen with a higher dose in order to increase the signal contrast (3). A further improvement can be made by selecting a proper photographic emulsion. The primary factors in evaluating the suitability of photographic emulsion for recording low dose diffraction patterns are speed, fog level, electron response at low electron exposure, linearity, and usable range of exposure. We have compared these factors with three photographic emulsions including Kodak electron microscopic plate (EMP), Industrex AA x-ray film (AA x-ray) and Kodak nuclear track film (NTB3).

scholarly journals Low Dose Soft X‐Ray Remotely Triggered Lanthanide Nanovaccine for Deep Tissue CO Gas Release and Activation of Systemic Anti‐Tumor Immunoresponse

2021 ◽  
pp. 2004391
Author(s):  
Youbin Li ◽  
Mingyang Jiang ◽  
Zhiming Deng ◽  
Songjun Zeng ◽  
Jianhua Hao
Keyword(s):  
Low Dose ◽  
Gas Release ◽  
Deep Tissue ◽  
X Ray ◽  
Co Gas

An investigation of the imaging characteristics of the Y2O2S:Eu3+ phosphor for application in X-ray detectors of Digital Mammography

1998 ◽  
Vol 49 (8) ◽  
pp. 931-937 ◽  
Author(s):  
D. Cavouras ◽  
I. Kandarakis ◽  
G.S. Panayiotakis ◽  
E. Kanellopoulos ◽  
D. Triantis ◽  
...  
Keyword(s):  
Digital Mammography ◽  
X Ray ◽  
Imaging Characteristics

Sensitization of the photostimulable x-ray storage-phosphor CsBr:Eu2+ following room-temperature hydration

2009 ◽  
Vol 105 (7) ◽  
pp. 073511 ◽  
Author(s):  
G. A. Appleby ◽  
J. Zimmermann ◽  
S. Hesse ◽  
O. Karg ◽  
H. von Seggern
Keyword(s):  
Room Temperature ◽  
Storage Phosphor ◽  
X Ray
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