Molecular Breast Imaging Composite Image Noise Reduction
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Solution Overview
Problem
Molecular breast imaging (MBI) is limited by high radiation doses associated with radiotracer agents, which reduce image quality when attempting to reduce the dose, making it challenging to achieve effective breast cancer screening without significant radiation exposure.
Innovation Solution
A system and method that combines images from opposing gamma detectors using filters to reduce noise in non-target regions and preserve contrast in target regions, allowing for the creation of composite molecular breast images with reduced radiation exposure while maintaining image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the amount of radiopharmaceutical administered is reduced to lower radiation dose, then radiation exposure is reduced, but image quality deteriorates due to fewer photons striking the gamma cameras
Solution Approach 1:
The patent combines images from multiple detector arrays (first and second gamma detectors) to create a composite molecular breast image. By merging the detected photon signals from both detectors, the system accumulates sufficient signal information even when each individual detector receives fewer photons due to reduced radiopharmaceutical dosage, thereby maintaining image quality while lowering radiation exposure
Solution Approach 2:
The patent utilizes the spatial dimension by positioning two gamma detectors in opposite orientations around the breast. This dimensional approach allows the system to collect photon data from multiple geometric perspectives, effectively increasing the total signal captured without increasing the radiopharmaceutical dose, thus resolving the contradiction between dose reduction and image quality maintenance
2Measurement precision
If standard MBI acquisition is used to maintain image quality, then image quality is preserved, but radiation dose increases by an order of magnitude compared to screening mammography
Solution Approach 1:
The composite image formation by merging signals from both gamma detectors enables the system to achieve adequate image quality with reduced radiopharmaceutical dosage, thereby lowering the radiation dose from the current order of magnitude above mammography to a more acceptable level while preserving diagnostic capability
Solution Approach 2:
The system creates multiple copies of the imaging process by using two separate gamma detectors simultaneously capturing photon emissions. These duplicate detection processes are then combined to form the final image, allowing for dose reduction while maintaining the quality needed for breast cancer screening
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method achieves image quality comparable to higher radiation exposures with reduced noise, enabling shorter acquisition times or lower radiation doses, thereby reducing cumulative radiation exposure over time.
Implementation Method 1
receive photons emitted from a radionuclide present in a subject's breast
Implementation Method 2
apply a filter configured to selectively combine the first and second detector images to produce a composite molecular breast image having reduced noise
Data Source
AI summary
A system and method is provided for analyzing detector data acquired during molecular breast imaging (MBI) that reduces a patient's radiation does without a reduction in image quality. The method processes and combines initial images acquired by the two gamma-camera detectors of the MBI system to produce a hybrid or composite image set having reduced noise and improved contrast. The composite image provides image quality comparable to that of traditional MBI methods, but at a lower patient radiation dose.