banner image
No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
Positron emission mammography (PEM): Effect of activity concentration, object size, and object contrast on phantom lesion detection
Rent this article for


Image of FIG. 1.
FIG. 1.

All 12 image slices for a phantom with two spheres: 12.4 mm [slices 1–3, bottom (posterior)]; and 15.6 mm (slices 5–8, central). LBRt = 3 for both spheres, and BG concentration = 0.44 kBq/mL. au: arbitrary units.

Image of FIG. 2.
FIG. 2.

(Top row) Single slices from three acquisitions at different BG activity levels of the 3.9 mm diameter sphere, with LBRt = 21. (Bottom row) Similar to top row but images of the 7.8 mm sphere with LBRt = 3. BG activity concentration is given at the top of each column. Arbitrary units (au) are consistent across columns.

Image of FIG. 3.
FIG. 3.

Measured BG activity concentration and COV versus the true activity in the phantom. The solid gray line is the line of identity. The dotted line is an extrapolation of the linear region (0–2 kBq/mL) of the measured concentration. COV from images generated using full list mode data files and reduced-count files are distinguished by open and solid diamond symbols. The line through COV data connects the 100%-count data points (open diamonds).

Image of FIG. 4.
FIG. 4.

Contrast recovery coefficient vs sphere size for sphere ROI max and mean. Error bars represent ± one standard deviation calculated by averaging CRC across BG concentration and LBRt.

Image of FIG. 5.
FIG. 5.

Cumulative reader detection sensitivity vs BG concentration and LBRt. Circle markers are measured data points; the mesh grid is an interpolation of measurements.

Image of FIG. 6.
FIG. 6.

(a) Symbols show individual reader detection sensitivities vs BG concentration, averaged over all LBR, and separated into two groups: 3.9 mm spheres and all other spheres. The solid lines with error bars represent mean cumulative results and corresponding standard deviation. (b) Cumulative sensitivity vs sphere diameter averaged over all LBR for each BG concentration. Error bars represent standard deviation across readers.


Generic image for table

Sphere and background (BG) properties used in phantom image acquisitions.

Generic image for table

Expected patient BG activity concentrations.

Generic image for table

Comparison of synthetic and single-acquisition images.


Article metrics loading...


Full text loading...

This is a required field
Please enter a valid email address
752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Positron emission mammography (PEM): Effect of activity concentration, object size, and object contrast on phantom lesion detection