The development of a breast phantom with realistic features that is simple and cheap to produce continues to be a challenge. Most commercial phantoms are expensive and unrealistic. This work proposes a breast phantom constructed with PMMA material and acrylic resin, considered as tissue-equivalent materials, to represent a breast of average density in a prototype mammography/tomosynthesis unit, and was designed to contain structures that represent mammary lesions such as microcalcifications, regular and irregular masses. The materials used for the construction are accessible to buy and easy to handle.
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http://dx.doi.org/10.1016/j.apradiso.2022.110389 | DOI Listing |
Unlabelled: Ultrasound imaging plays an important role in the early detection and management of breast cancer. This study aimed to evaluate the imaging performance of a range of clinically-used breast ultrasound systems using a set of novel spherical lesion contrast-detail (C-D) and anechoic-target (A-T) phantoms.
Methods: C-D and A-T phantoms were imaged using a range of clinical breast ultrasound systems and imaging modes.
J Biophotonics
January 2025
The College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin, China.
Diffuse optical tomography (DOT) enables the in vivo quantification of tissue chromophores, specifically the discernment of oxy- and deoxy-hemoglobin (HbO and HbR, correspondingly). This specific criterion is useful in detecting and predicting early-stage neoadjuvant breast cancer treatment response. To address the issues of the limited channels in the fiber-dependent breast DOT system and limited signal-to-noise ratio in the camera-dependent systems, we hereby present a camera-based lock-in detection scheme to achieve dynamic DOT with improved SNR, which adopted orthogonal frequency division multiplexing technology.
View Article and Find Full Text PDFMed Phys
January 2025
Department of Medical Biophysics, Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada.
Background: With increasing evidence supporting three-dimensional (3D) automated breast (AB) ultrasound (US) for supplemental screening of breast cancer in increased-risk populations, including those with dense breasts and in limited-resource settings, there is an interest in developing more robust, cost-effective, and high-resolution 3DUS imaging techniques. Compared with specialized ABUS systems, our previously developed point-of-care 3D ABUS system addresses these needs and is compatible with any conventional US transducer, which offers a cost-effective solution and improved availability in clinical practice. While conventional US transducers have high in-plane resolution (axial and lateral), their out-of-plane resolution is constrained by the poor intrinsic elevational US resolution.
View Article and Find Full Text PDFPhys Med
January 2025
Medical Physics Unit, ASST Monza, Monza, Italy.
Purpose: Digital Breast Tomosynthesis (DBT) is an advanced mammography technique for which there are currently no internationally agreed methods and reference values for image quality assessment. The aim of this multicentre study was to evaluate a simple method to assess the technical image quality of reconstructed and synthetic 2D (SM) images of different models of DBT systems using commercially available phantoms.
Methods: The signal difference to noise ratio (SDNR) was chosen as an index of technical image quality and was evaluated for three commercial phantoms, Tomophan, Tormam and CIRS model 015, on 55 DBT systems (six vendors, nine models).
Phys Med
January 2025
Centre for Medical Radiation Physics, University of Wollongong Australia, Wollongong, NSW 2522, Australia.
Purpose: To propose comprehensive characterization methods of additive manufacturing (AM) materials for MV photon and MeV electron radiotherapy.
Methodology: This study investigated 15 AM materials using CT machines. Geometrical accuracy, tissue-equivalence, uniformity, and fabrication parameters were considered.
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