AMULET Innovality : Tomosynthesis

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Tomosynthesis

High quality images for easier diagnosis

Tomosynthesis: making it possible to observe the internal structure of the breast

[image] X-ray tube moving in arc for tomosynthesis producing sliced images

In breast tomosynthesis, the X-ray tube moves through an arc while acquiring a series of low-dose X-ray images.

The images taken from different angles are reconstructed into a range of Tomosynthesis slices where the structure of interest is always in focus.

The reconstructed tomographic images make it easier to identify lesions which might be difficult to visualize in routine mammography because of the presence of overlapping breast structures.

The Tomosynthesis function on AMULET Innovality is suitable for a wide range of uses, offering two modes to cater for various clinical scenarios. Standard (ST) mode combines rapid exposure timing and efficient workflow with a low X-ray dose while High Resolution (HR) mode makes it possible to produce images with an even higher level of detail, allowing the region of interest to be brought into clearer focus.

[photo] 2D mammography image of breast tissue compared to Excellent-m 3D image of breast

S-View(synthesized 2D image)function is available

Tomosynthesis by AMULET Innovality automatically produces not only tomograms obtained at 1 mm intervals but also a two- dimensional S-View image combining multiple slice images.
With the S-View image showing the overall view added to tomograms offering the views in detail, comprehensive image reading is possible.

[photo] Multiple slice images of breast tissue combine into S-view image

ISR (Iterative Super Reconstruction)

The tomosynthesis iterative super-resolution reconstruction (ISR) method is applied to optimize image quality, achieving significant X-ray dosage reduction.

1. Reducing graininess of image in low-dose tomography

The image patterns are recognized to selectively suppress the patterns that do not exist in human body architectures as noise, to reduce distractive noises in the event of low-dose tomography.

2. Suppressing interference of human body architectures at different depths (as illustrated on the right)

In the process of reconstructing the 3D breast architecture from multiple 2D images, calcification, mass, spicula, mammary gland and other signals that emerge from different depths in the breast architecture are selected off to reproduce the breast architecture at the focus depth with greater fidelity.

3. Restoring the fine-structure

Our super-resolution technology is introduced to restore the fine-structure of calcification and other phenomena, the visibility of which is impaired by the movement of the X-ray tube, to facilitate interpretation of tomosynthesis images.

[image] Example of Tomosynthesis process and Artifact by Calcification in breast tissue

Offers significantly lower doses than the conventional method

[image] Chart showing radiation dose of Excellent-m 2D Tomosynthesis is approx. 30% less than conventional

With combination of 2D and Tomosynthesis Dose of 2 or less mGy is available^*2

*1 Equivalent to an image of 40 mm PMMA compared with previous images (Breast thickness of 45 mm, 50% mammary gland, 50% fat)
*2 IAEA guidance level: 3 mGy, guidelines of the Japan Association of Radiological Technicians: 2 mGy
*In-house comparison

Two modes suitable for a range of clinical purposes

HR (High Resolution) mode

Acquisition angle: ±20°
Pixel size: 100/50 m

With a larger acquisition angle the depth resolution is improved. This allows the region of interest to be defined more clearly and brought into clearer focus.

[image] High Resolution mode for improved depth resolution capturing region of interest on breast tissue

Additional imaging for complete checkup, grasping morphology, etc.

[photo] AMULET Innovality takes approx. 9 seconds to capture image in High Resolution mode

ST (Standard) mode

Acquisition angle: ±7.5°
Pixel size: 100/150 m

The smaller angular range and fast image acquisition allow Tomosynthesis scans to be quickly performed with a relatively low X-ray dose.

[image] Standard mode smaller angular range quickly capturing region of interest on breast tissue

Check-up, screening, follow-up, etc.

[photo] AMULET Innovality takes approx. 4 seconds to capture image in Standard mode

Static face guard for Tomosynthesis imaging (Face Guard T Comfort)

[photo] Removing static face guard from device

Fixing the face guard to the device instead of the tube part eliminates movement of the face guard during Tomosynthesis imaging. It will not be reflected at any angle of the ST mode (15 degrees) or HR mode (40 degrees). It can also be used as-is for normal mammography imaging.

Shortens the imaging cycle with a fast display and reconstruction

After a shot, the next shot in either 2D or 3D can be started with a cycle time of approx. 15 seconds.

[image] Process of Standard mode imaging from start of first shot to finish

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AMULET Innovality - Tomosynthesis

Tomosynthesis

Tomosynthesis: making it possible to observe the internal structure of the breast