Dr. Gregory Sorensen

Nuclear Medicine
Alzheimer's disease: Reason for hope
When President Reagan welcomed women's basketball coach Pat Summitt to the White House 25 years ago, no one knew that Alzheimer's would someday become a thread connecting them. Fortunately, imaging now offers more certainty for those who may unknowingly have the disease, according to Siemens Healthcare CEO Dr. Gregory Sorensen.
August 5, 2012
2012 08 03 13 29 17 498 Sorensen Gregory 70
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T1/T2-weighted MRgFUS ratio imaging improves brain lesion contrast
T1/T2-weighted ratio imaging via MRgFUS improves chronic lesion contrast compared to T2-weighted imaging.
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MRI
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Ultrasound
New breast ultrasound approach cuts false positives by nearly a third
Tracking and quantitative analysis of diaphragmatic motion and projected lung area (PLA) at dynamic chest radiography (DCR) in a 55-year-old healthy man during deep breathing. (A) Posteroanterior radiograph with purple and green lines indicating the right and left lateral diaphragm apices, respectively. (B) Graph of diaphragmatic motion (in millimeters; y-axis) over time (i.e., frame number; x-axis). The software tracked the position of the diaphragm apex at DCR to obtain these amplitude-time plots of diaphragmatic motion (right lung, purple; left lung, green). The dark blue line corresponds to the frame representing the end of inspiration; the light blue line corresponds to the frame representing the end of expiration. (C) Posteroanterior radiograph shows the PLA (outline), which is the area surrounded by the medial edge of the ribs, the diaphragm, and the edge of the mediastinum. (D) Graph of PLA (in millimeters squared; y-axis) over time (i.e., frame number; x-axis). The software automatically tracked the boundaries of the lung fields and obtained the time-varying curves of the bilateral lung field areas. The blue line corresponds to the frame representing the end of inspiration.
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