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Speeding up CT scans with cellphone technology, ultrasound warning signal for breast cancer

ibility during surgery in near real-time. The technology involves the development of CBCT on a mobile C-arm to acquire a full-volume image in a single rotation around the patient.

While the image quality achieved with early cone-beam CT prototypes is not quite equivalent to that of a high-performance diagnostic CT scanner, image quality has been shown to be sufficient to guide surgeons and radiologists with respect to soft-tissue targets and critical structures.

Patients have been successfully treated with the prototype in a research setting, with trials underway in a broad spectrum of surgical and interventional procedures ranging from tumor ablation to orthopedic surgery and brachytherapy. High-quality intraoperative imaging provided by C-arm CBCT is expected to dramatically improve surgical performance and expand the application of minimally invasive interventions to cases that would be otherwise untreatable. [Wednesday, July 25, 8:55 AM (WE-B-L100F-2), Thursday, July 26, 11 AM (TH-C-M100J-6 ), and 2:54 PM (TH-D-L100J-8)]


VII. 3D BREAST IMAGING USING GAMMAS AND X RAYS

Scientists at Duke University combine the best aspects of x-ray computed tomography (CT) scanning with single photon emission computed tomography (SPECT), which is the single-gamma-ray counterpart of positron emission tomography (PET) scans, to obtain both anatomical and functional information using a single comfortable gantry. The computer reconstruction of the continuously acquired data employs an iterative algorithm that handles both CT and SPECT data in turn. The new features of this hybrid system include, first on the SPECT side, a spatial resolution of 2.5 mm and an energy resolution of 6%. On the computed tomography (CT) side, with a dose as low as one-tenth that used in normal x-ray screening mammography, the imaging can reveal normally hard-to-see lesions near the chest wall, and the spatial resolution is 0.5 mm. The SPECT imag
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Contact: Ben Stein
bstein@aip.org
301-209-3091
American Institute of Physics
10-Jul-2007


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