University of Washington

Larry A Pierce, Ii

Robert S Miyaoka

Robert L Harrison

Hubert Vesselle

Robert Stewart

Various devices, systems, and methods for performing personalized dosimetry of a patient receiving a radiopharmaceutical are described. In an example method, anatomic data is generated by performing a computed tomography (CT) scan on the patient when they are lying down and wearing a garment. Based on the anatomic data, locations of organs of the patient are determined with respect to one or more fiducial markers integrated with the garment. Detectors for detecting photons from a radiopharmaceutical are placed on the garment based on locations of the organs. Subsequently, the patient may be administered a dose of the radiopharmaceutical. When the patient wears the garment, the detectors may detect photons released from the decaying radiopharmaceutical that is distributed in the organs. The radiation dosage to the organs may be determined based on the detected photons.

Devices, systems, and methods for personalized dosimetry

A garment for detecting radiation washout (e.g., radioactivity concentrations) in organs includes a covering that wraps around and is secured to the body. The covering permits positron emission tomography-computed tomography (PET/CT) imaging of the body through the covering. The garment includes guides formed from a material that is visible in a computed tomography (CT) image of the garment, such that the guides are visible in CT images of user organs that the garment overlies. A plurality of radiation detectors are attached to the covering in a configuration customized for the body. A wiring system connects the plurality of radiation detectors to a power and data control system that is configured to transmit data from the garment to a remote service provider.

Multi-detector personalized home dosimetry garment

Various noncollimated single photon emission computed tomography (SPECT) technologies are described herein. An example device includes an array of detectors configured to detect a flux of first photons transmitted from a field of view (FOV) over time. The device also includes an attenuator disposed between the array of detectors and the FOV. The attenuator is configured to move over time and to attenuate second photons emitted from the source. In various implementations, the attenuator is not a collimator. Based on the fluxes of the first photons detected by the detectors, and the position of the attenuator over time, an imaging system may be configured to generate an image of the FOV.

Noncollimated single-photon emission computed tomography

A method for calibrating a nuclear medicine tomography detector module using principal component analysis is based on the idea that calibration beam data lies on a one-dimensional path within the higher dimensional dataspace of output data. The module includes a weighted multiplexing circuit that generates a small number of multiplexed signals for each photon event. Calibration data for the module is generated and analyzed using several iterations of principal component analyses, to filter scattering events, noise, and other spurious signals. The direction of depth-of-interaction information has been found in the high-dimensional dataspace to be indicated by the primary principal component of the calibration data. The primary principal components, principal components from filtered datasets, intermediate thresholds, and DOI or inner product values are recorded for calibrating the module.

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Seattle, WA, United States of America

Larry A Pierce, Ii