MLO view

MLO view

Mediolateral oblique view. A view of the breast from the side, one of two standard viewing directions for mammography.
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Figure 2(a) shows the MLO view of right breast for the selected case, the small inset picture shows zoomed out ROI region that is cropped and provided to the algorithm as input.
Each case contains four different images (CC, MLO views for left and right breast) along with annotation information of detected image region.
In an MLO view, the x-ray beam enters medially and the film is located laterally.
The MLO view is not orthogonal to the CC view but oriented 30[degrees] to 60[degrees] to it.
Its length on the MLO view should be within 1 cm of its length on the CC view.
As a first order of approximation on a screening mammogram, a mass seen above the PNL on the MLO view is in the upper breast.
Because of this oblique orientation, a mass that is above the PNL on the MLO view could actually be in the lower half of the breast.
5-cm right breast mass is seen laterally on the CC view, above the PNL on the MLO view, but below the PNL on the ML view, it is located in the right, lower, outer quadrant.
A mass located medially on the CC view will actually be higher in the patient than predicted by the MLO view (Figure 12).
In this technique, the MLO view is placed in the center and the CC view is placed on either side with the nipple at the same level and pointing in the same direction (Figures 13 and 14).
3) Postprocessing filters: Noise reduction algorithms were developed to generate 4 composite images (one from each CC and MLO view of each breast).
For MBI, patients were injected with 296 MBq Tc-99m sestamibi and the standard CC and MLO views acquired of each breast.