Radiological Physics and Technology This is an RSS file. You can use it to subscribe to this data in your favourite RSS reader or to display this data on your own website or blog.

Dedicated phantom tools using traceable 68Ge/68Ga point-like sources for dedicated-breast PET and positron emission mammography scanners
In this study, we developed phantom tools for evaluating the quantitative accuracy of positron emission mammography (PEM) and dedicated-breast PET (dbPET) scanners using novel traceable point-like68Ge/68 Ga sources. The PEM phantom consisted of an acrylic cube (100 × 100 × 40 mm) and three point-like sources. The dbPET phantom comprised an acrylic cylinder (ø100 × 100 mm) and five point-like sources. These phantoms were used for evaluating the fundamental responses of clinical PE M and dbPET scanners to point-like inputs in a medium. The results showed that reasonable recovery values were obtained based ...
Source: Radiological Physics and Technology - January 9, 2023 Category: Physics Source Type: research

Evaluation of apparent diffusion coefficient of two-dimensional BLADE turbo gradient- and spin-echo diffusion-weighted imaging with a breast phantom
In conclusion, TGSE-BLADE-DWI can offer a better SNR, less distortion, and more reliable A DC measurements than SS-EPI-DWI in a breast phantom. (Source: Radiological Physics and Technology)
Source: Radiological Physics and Technology - January 3, 2023 Category: Physics Source Type: research

Characteristics of the deep learning-based virtual monochromatic image with fast kilovolt-switching CT: a phantom study
ConclusionThe physical properties of the DL-Spectral CT VMIs varied with the energy level. The 70  keV VMI had the highest detectability by far among the VMI and 120-kVp images. DL-Spectral CT may be useful to reduce radiation doses. (Source: Radiological Physics and Technology)
Source: Radiological Physics and Technology - December 30, 2022 Category: Physics Source Type: research

Shielding performance of multi-metal nanoparticle composites for diagnostic radiology: an MCNPX and Geant4 study
This study aimed to examine and introduce the radiation-shielding properties of single- and multi-metal nanoparticle (NP)-based composites containing Bi, W, and Sn using Geant4, MCNPX, and XCom for radiological applications. The mass attenuation coefficients and effective atomic numbers of single- and multi-metal NP-loaded polymer composites were calculated using the Geant4 and MCNPX simulation codes for X-ray energies of 20 –140 keV. The nano-sized fillers inside the polydimethylsiloxane (PDMS:C2H6SiO) matrix included W (K  = 69.5  keV), Bi (K  = 90.5  keV), and Sn (K  = 29.20  keV). For single-metal shi...
Source: Radiological Physics and Technology - December 23, 2022 Category: Physics Source Type: research

Eiichi Tanaka, Ph.D. (1927 –2021): pioneer of the gamma camera and PET in nuclear medicine physics
(Source: Radiological Physics and Technology)
Source: Radiological Physics and Technology - December 19, 2022 Category: Physics Source Type: research

Evaluation of x-ray effective focal spot size dependency on x-ray exposure settings using edge response analysis
In conclusion, the edge response method can provide useful information on the x-ray focal spot relationship with the x-ray exposure settings used, as well as its reproducibility among several x-ray tubes. (Source: Radiological Physics and Technology)
Source: Radiological Physics and Technology - December 14, 2022 Category: Physics Source Type: research

Characteristics of a real-time radiation exposure dosimetry system using a synthetic ruby for radiotherapy
This article discusses the development of our recent real-time radiation exposure dosimetry system that uses a synthetic ruby for radiation therapy. Background noise was observed before the measurement of the short-term characteristic features. Regarding the relationship between the number of photons and dose rate, using 100 monitor units (MU)/min as the measurement value, the counts decreased by approximately 10% at 600 MU/min. A clear correlation was observed between the MU value and the number of photons (R2 = 0.9987). The coefficient of variation (%CV) was less than ± 1.0% under all the irradiation conditions....
Source: Radiological Physics and Technology - December 12, 2022 Category: Physics Source Type: research