Breast tomosynthesis is an advanced form of mammography that uses low-dose x-rays and 3D reconstruction to create three-dimensional images of the breast. Multiple x-ray images are taken over a limited sweep angle and digitally reconstructed into slices to view tissue at different depths within the breast. This allows for detection of smaller tumors and greater accuracy in diagnosis compared to traditional mammography. While exposure to radiation is a risk, the benefits include improved cancer detection rates and fewer unnecessary biopsies.

1. TOMOSYNTHESIS
PRESENTED BY
SAHEB JANA
BWU/BRI/21/091

2. Breast Tomosynthesis
• Breast tomosynthesis is an
advanced form of mammography,
a specific type of breast imaging
that uses low-dose x-rays to detect
cancer early when it is most
treatable.

3. How does the procedure work?
 Breast tomosynthesis uses a low-dose x-ray system, electronics and a
computer to convert x-ray images of the breast to a three-
dimensional image set.
 Multiple x-ray images of the breast are digitized using systems similar
to those found in digital cameras and then transferred to a computer
where they are reconstructed or "synthesized" into a three-
dimensional image set.
 In this way, 3-D breast imaging is similar to computed tomography
(CT) imaging in which a series of thin high-resolution "slices" are
assembled together to create a 3-D reconstruction of the body.

4. TUBE MOTION
• DBT tube motion refers to the mode of x-ray
tube emission with respect to motion of the
gantry, with the use of either a continuous or
step-and-shoot technique.
SWEEP ANGLE
-Similar to CT images, tomosynthesis images are obtained
with a moving x-ray source. However, tomosynthesis images
are obtained over a limited angular range, or sweep angle.
The sweep angle for DBT is 15°–50°

5. RECONSTRUCTION
• Tomosynthesis imaging data in
the Fourier domain are
incomplete owing to the limited
sweep angle and small number
of projections

7. BENEFIT
Imaging of the breast allows detection of small tumors. When cancers
are small, the woman has more treatment options.
The use of screening mammography increases the detection of small
abnormal tissue growths confined to the milk ducts in the breast, called
ductal carcinoma in situ (DCIS).
Greater accuracy in pinpointing the size, shape and location of breast
abnormalities .
Fewer unnecessary biopsies or additional tests.
Greater likelihood of detecting multiple breast tumors.
Clearer images of abnormalities within dense breast tissue.

8. RISK
Exposure to a low level of radiation. A 3D mammogram uses X-rays to
create an image of the breast, which exposes you to a low level of
radiation. ...
The test may find something that turns out to not be cancer. ...
The test can't detect all cancers.