Routinely, data acquired with medical imaging systems are not consistent with a single true image of the subject. Data inconsistencies arise from various causes (beam-hardening effects, subject motion...
Learn More

Signal-to-noise ratio (SNR) is utilized in medical imaging as a quantitative measure of image quality. As SNR decreases, it becomes increasingly more difficult to differentiate between important anato...
Learn More

In modern computed tomography (CT) imaging, a number of non-ideal physical conditions may cause artifacts in the reconstructed images. Mitigation or elimination of image artifacts has been a time- and...
Learn More

Dual-energy computed tomography (CT) was first proposed in the 1970s but has wavered in practical usage ever since. In essence, the process employs two different X-ray spectra (i.e., a high energy lev...
Learn More

In recent years, statistical imaging reconstruction has been introduced in clinics by different computed tomography (CT) manufacturers as a means to reduce radiation dose levels. Essentially, the meth...
Learn More

Phase contrast imaging exploits differences in the refractive index of materials to differentiate and image them. Recently, X-ray phase contrast imaging has attracted a great deal of attention. In the...
Learn More

Computed tomography (CT) systems are medical imaging devices that use X-rays to image a patient internally. An X-ray source sends parallel beams through the patient. The X-ray absorption/scattering,...
Learn More

Breast cancer is the most common cancer among women today with all women having approximately an 11 to12 percent chance of developing this cancer and a 30 to 40 percent chance of death after developme...
Learn More

In computed tomography (CT) imaging, divergent beam data acquisition modes have the potential to speed up data acquisition and shorten scan time. However, image reconstruction from divergent-beam proj...
Learn More

The Feldkamp (FDK) algorithm is widely used for image reconstruction for cone-beam projections, which are utilized in three-dimensional computed tomography (CT). However, because current FDK-type algo...
Learn More

Although stroke afflicts more than 700,000 people in the United States annually, the only FDA-approved clinical treatment is intravenous administration of tissue plasminogen activator (tPA) within thr...
Learn More

Most commercially available computed tomography (CT) systems employ image reconstruction methods based on the concepts of Radon space and the Radon transform. When a CT X-ray source projects a single ...
Learn More

A system and method for material decomposition of a single energy spectrum x-ray dataset includes accessing the single energy spectrum x-ray dataset, receiving a userselection of a desired energy for ...
Learn More

UW-Madison researchers have developed an AI-assisted imaging technology that uses a deep neural network to reconstruct a 3-D model of the patient. This invention predicts patient positioning, beam int...
Learn More

A system and method for reconstructing an image of a subject acquired using a tomographic imaging system includes at least one computer processor configured to form an image reconstruction pipeline. T...
Learn More

Conventional CT scans utilize a fan-shaped X-ray beam source and a detector array to acquire data for 2-D medical imaging. The source and detector array are situated on opposite sides of the patient ...
Learn More

In a computed tomography (CT) system, an X-ray source projects a fan-shaped beam, which passes through the object being imaged and hits an array of radiation detectors. The source and detector array a...
Learn More

Computed tomography (CT) systems are used for medical imaging and produce images by measuring the loss in an X-ray beam’s strength. These measurements are used to reconstruct an image in 2-D or 3-D...
Learn More

Computed tomography (CT) systems are used for medical imaging and produce images by measuring the loss in an X-ray beam’s strength. These measurements are used to reconstruct an image in 2-D or 3-D...
Learn More

In a computed tomography (CT) system, an X-ray source projects a fan-shaped beam, which passes through the object being imaged and hits an array of radiation detectors. The source and detector array a...
Learn More

In imaging technologies, signal-to-noise ratio (SNR) is a quantitative measure of image quality. In medical imaging specifically, as SNR decreases, it becomes increasingly difficult to differentiate b...
Learn More

The X-ray source and radiation detector in a conventional computed tomography (CT) system are rotated on a gantry so that the angle at which the X-ray beams intersect the object constantly changes. In...
Learn More

Visualizing a patient’s heart by non-invasive cardiovascular imaging is a powerful tool for diagnosis and therapy. Yet the heart’s movement and small branching arteries make quality cardiac imagin...
Learn More

The outcome of a stroke can hinge on the time spent on diagnosis and intervention. Perfusion imaging is a critical step in the process, wherein a patient is scanned to identify salvageable tissue. The...
Learn More

UW-Madison researchers developed a method to correct the CT number accuracy degradation problem in low dose CT imaging. By understanding the CT number bias resulting from clinical implementations, the...
Learn More