Mammography plays a key role in the early detection and treatment of breast cancer and helps to reduce the number of deaths caused by the disease. Mammography screening is recommended for all women over the age of 40 years or for younger women who have a family history of breast cancer. How does mammography work?
NEXT Optimizing a mammography procedure for maximum visualization of anatomy and signs of pathology without unnecessary radiation to the patient is achieved by the selection of the best combination of technique factors that make up the imaging protocol.
Each of these factors generally has an effect on one of the specific image quality characteristics and in many cases, an effect on patient radiation dose. At this point we identify the principal technique factors and their general functions. The detailed applications will come later.
The photon energy spectrum of the x-ray beam is one of the most critical factors in optimizing a procedure with respect to contrast sensitivity and radiation dose.
The spectrum depends on the combination of three factors: The AEC typically makes a brief exposure to measure penetration through the breast and from that calculates appropriate technique factors for the imaging.
When using the AEC to automatically set the spectrum the operator also has a role in optimizing the technique factors.
Most equipment with this feature allows the operator to select a "priority" for the procedure in the balance between contrast sensitivity and radiation dose. When the "DOSE" mode is selected the factors are automatically set to produce a more penetrating spectrum that reduces the dose but at the cost of reduced contrast sensitivity.
Scripps provides digital mammography using the latest breast imaging technology and expertise. A digital mammogram uses a low-dose X-ray that passes through your breast tissue to create a high-contrast, high-resolution image of the inner structures of the breast. Sep 01, · A mammogram is a low-dose x-ray that allows doctors called radiologists to look for changes in breast tissue. Why do I need mammograms? A mammogram can often find or detect breast cancer early, when it’s small and even before a lump can be felt. We are thrilled to be the first in Pierce County to provide 3D mammography to women and men in our community. The information below will help you better understand 3D mammography and answer any questions you may have.
The relationship between contrast sensitivity and dose is described later with an emphasis on the need to optimize the imaging factors for specific breast conditions. Image quality depends on the appropriate exposure being delivered to the receptor.
With digital receptors the contrast generally does not depend on the level of receptor exposure but the exposure must still be carefully controlled to optimize the procedure with respect to image noise and radiation dose to the breast.
The AEC system is useful in obtaining optimum exposure but does require involvement of the operator. First, the AEC sensors must be selected and positioned in relation to the anatomy and breast conditions and the "Density" or exposure control set to optimize for variable conditions.
The AEC system must be periodically evaluated by a medical physicist and set-up by the engineering staff to insure proper performance.Why is 3D Mammography Performed? Traditional mammography produces just two images of each breast, a side-to-side view and a top-to-bottom view.
3D mammography produces many X-ray images of the breasts from multiple angles to create a digital 3-dimensional rendering of internal breast tissue. A mammogram is an x-ray picture of the breast.
Mammograms can be used to check for breast cancer in women who have no signs or symptoms of the disease. This type of mammogram is called a screening mammogram. This may make it hard to see small masses in the breast tissue on a mammogram.
The breasts are extremely dense, which makes it hard to.
Free Essay: Mammography Breast cancer is a common malignancy diagnosed in women. In the United States one in eight women who live to the age of 95 will be. X-ray Beam Contrast: CONTENTS The contrast in the invisible image emerging from the patient's body is an image of the different attenuations through the body and is sometimes referred to as subject contrast, especially in older publications.
This page covers x-ray interaction with matter and tissue contrast in x-ray imaging. It covers the relationship between patient size, attenuation, kV, and dose. A specific discussion covers mammography physics. Three-dimensional mammography (also called digital breast tomosynthesis) creates a three-dimensional picture of the breast using x-rays.
Several low-dose images from different angles around the breast are used to create the 3D picture.