Clinical Evaluation of Primary Sampling Scatter Correction for Chest Tomosynthesis
Clinical Evaluation of Primary Sampling Scatter Correction for Chest Tomosynthesis
This is a study that will evaluate the utility of a scatter reduction technique in reducing
 dose and increasing the sensitivity of stationary digital chest tomosynthesis (s-DCT) in the
 detection of lung lesions.
Digital tomosynthesis is an imaging modality that produces 3D sectional information using
 x-ray projections acquired over a limited scanning angle. Scatter is known to be the primary
 source of image degradation in x-ray based imaging.

 The investigators have developed an approach that measures scatter through a low dose (3% of
 the conventional scan) scatter measurement technique. Preliminary studies have shown that
 scatter reduction in DCT can significantly improve quality. The approach will characterize
 the reader confidence in lung nodule detection in a scatter corrected chest tomosynthesis
 imaging approach as compared to the conventional chest tomosynthesis.

 Fifty (50) patients who have undergone a clinical non-contrast CT with lung nodules will be
 asked to have an s-DCT (scan) within 4 weeks (+/- 2 week) of their clinical CT with no
 intervening procedures or therapies (i.e. biopsy of lung nodules). Investigators will then
 perform a reader study to evaluate the radiologist reader confidence in images generated from
 the scatter reduction technique versus more conventional chest tomosynthesis imaging.
Inclusion Criteria:

 -  Patients with known lung lesion(s)

 -  Patients having undergone a chest CT

 -  Patients 18 years of age and older

 -  Patients able to provide informed consent

 Exclusion Criteria:

 -  Patients who may not fit on a 35 x 35 detector (BMI > 35)

 -  Planned procedures or therapies during study (in between SOC scans and study scan on
 s-DCT) (biopsy or removal of lung lesion)

 -  Any woman who is pregnant, has reason to believe she is pregnant, or is lactating