1. A method for constructing an image of an object having an organ of interest utilizing a medical imaging system, said method comprising: scanning an image volume of the organ of interest to acquire image data defining a plurality of image frames; selecting one image frame as a baseline image defining a largest area for the organ of interest; replacing each pixel in the baseline image with a pixel having a higher density measurement for the organ of interest from the other image frames defining a combined image; and constructing a single attenuation correction (AC) image based on a maximized combined image formed from pixels having the highest density measurements.