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Pratik KumarJournal of Medical Physics 2022 47(1):116-118 (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - March 31, 2022 Category: Physics Authors: Pratik Kumar Source Type: research
Changing the changing room practice in radiation oncology
Pragyat Thakur, Rahul Krishnatry, Priyanka Goel, Tapas Kumar Dora, Rakesh Kapoor, Jai Prakash AgarwalJournal of Medical Physics 2022 47(1):114-115 (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - March 31, 2022 Category: Physics Authors: Pragyat Thakur Rahul Krishnatry Priyanka Goel Tapas Kumar Dora Rakesh Kapoor Jai Prakash Agarwal Source Type: research
Embryo/Fetus doses from 18F-fludeoxyglucose radiopharmaceutical in positron emission tomography/computed tomography
Conclusions: The embryo/fetus dose from F-18 FDG PET/CT was <15 mGy, however, questioning the women's childbearing prior to scintigraphy is the first-line strategy to avoid accidental radiation exposure and stochastic risks. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - March 31, 2022 Category: Physics Authors: Nazenin Ipek Isikci Mustafa Demir Source Type: research
Effective atomic number and electron density determination for fricke gel dosimeters using different methods
Ouiza MoussousJournal of Medical Physics 2022 47(1):105-108The effective atomic number and electron density of some Fricke gel dosimeters were calculated for photon interaction in the energy range from 10 keV to 1000 MeV using Auto-Zeff, direct and power law methods. The results are presented relative to those of water to allow direct comparison. It is found, that the effective atomic numbers and effective electron densities calculated with the Auto-Zeff and direct methods, demonstrates a good agreement in the energy interval extending from 0.1 MeV to 10 MeV. For effective atomic number relative to water, Ferrous Agarose X...
Source: Journal of Medical Physics - March 31, 2022 Category: Physics Authors: Ouiza Moussous Source Type: research
Monte Carlo dose calculation & #8211; A QA method for srt and sbrt plans in treating multiple and small metastatic lesions
Teh Lin, Lu Wang, C-M Charlie MaJournal of Medical Physics 2022 47(1):99-104To provide accurate and fast 3-D dose verification for hypofractionated stereotactic radiotherapy (SRT/SBRT) of small and multi targets calculated with a Varian Eclipse treatment planning system (TPS) delivered on a Varian accelerator. Ten brain and lung hypofractionated SRT/SBRT linac-based and CyberKnife plans were generated by the Eclipse system for delivery on the accelerator with the Millenium-120 leaf multileaf collimator (MLC) and Multiplan for the CyberKnife machine. These clinical SRT/SBRT plans required accurate quality assurance measurem...
Source: Journal of Medical Physics - March 31, 2022 Category: Physics Authors: Teh Lin Lu Wang C-M Charlie Ma Source Type: research
Fast B1 mapping based on double-angle method with T1 correction using standard pulse sequence
Yoshiyuki Ishimori, Takeshi Shimanuki, Tomoya Kobayashi, Masahiko MonmaJournal of Medical Physics 2022 47(1):93-98Radiofrequency (RF) field (B1) mapping by combining the double-angle method (DAM) and T1 correction was investigated. The signal intensities S1 and S2 acquired by flip angle (FA) α and double FA 2α at short repetition time (TR) were converted to a signal intensity at TR=∞ by T1 correction. Then, these were used for DAM calculation. The T1 values are measured from two different images acquired with different TRs based on the saturation recovery (SR) method prelimin...
Source: Journal of Medical Physics - March 31, 2022 Category: Physics Authors: Yoshiyuki Ishimori Takeshi Shimanuki Tomoya Kobayashi Masahiko Monma Source Type: research
Assessment of regional diagnostic reference levels in dental radiography in Tamil Nadu
Conclusion: This study revealed the need for dose management and radiation dose optimization, in various dental facilities in the state. It was also found that dental facilities employed with the digital type of detector are not always related to lower exposure. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - March 31, 2022 Category: Physics Authors: Amal Jose A Saravana Kumar KN Govindarajan Sunil Dutt Sharma Source Type: research
Original knee fixation device as a useful fixation method during prostate intensity-modulated radiation therapy
Conclusions: The IMRT fixation method using an original KFD improved the residual rotational error in the three directions and the inter-fractional error in the A-P direction, reduced the interfractional margins in the A-P, and S-I directions and improved CTV coverage. Our original KFD may be a useful fixation method during prostate IMRT. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - March 31, 2022 Category: Physics Authors: Noriyuki Kuga Katsutoshi Shirieda Yuta Sato Haruhiko Shimotabira Yusuke Kurogi Takashi Jinnouchi Source Type: research
Evaluation of radiation dose reduction and its effect on image quality for different flat-panel detectors
Conclusion: This study demonstrates the feasibility of using a semi-anatomical chest phantom in the optimization of radiation dose and image quality. The FOM was a good indicator in assessing image quality between different detectors. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - March 31, 2022 Category: Physics Authors: R Benedicta Pearlin Roshan Samuel Livingstone Anita Jasper Shyam Kumar N. Keshava Gibikote Sridhar Source Type: research
Influence of jaw setting in the determination of stereotactic small-field output factors with different detectors
Conclusion: Output factors obtained with different detectors show high differences in the smallest field size for all collimating systems. This study confirms that the position of X and Y jaw above the tertiary collimator significantly influences the small-field output factor. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - March 31, 2022 Category: Physics Authors: Seby George Y Retna Ponmalar Henry Finlay Godson A Sathish Kumar B Paul Ravindran Source Type: research
Classifying COVID-19 and viral pneumonia lung infections through deep convolutional neural network model using chest X-Ray images
Conclusions: The proposed classification model may be highly useful for the preliminary diagnosis of COVID-19 and viral pneumonia cases, especially during heavy workloads and large quantities. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - March 31, 2022 Category: Physics Authors: Dhirendra Kumar Verma Gaurav Saxena Amit Paraye Alpana Rajan Anil Rawat Rajesh Kumar Verma Source Type: research
Implementation and validation of anisotropic analytical algorithm in eclipse treatment planning system for indigenous telecobalt machine (Bhabhatron II)
Conclusion: From this study, we concluded that AAA-based dose calculation in TPS is very well suited for accurate dose calculations for telecobalt machine and can be implemented for clinical use. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - March 31, 2022 Category: Physics Authors: Raghavendra Hajare Md Basit Ali KK Sreelakshmi M Anil Kumar Rituraj Kalita Umesh M Mahantshetty Source Type: research
Segmentation of organs and tumor within brain magnetic resonance images using K-nearest neighbor classification
Conclusion: The proposed KNN method can accurately segment organs and tumor using standard brain MRI images, provides fast and accurate image processing and planning tools, and paves the way for clinical implementation of MRI-guided radiotherapy and adaptive radiotherapy. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - March 31, 2022 Category: Physics Authors: SA Yoganathan Rui Zhang Source Type: research
Calculation of attenuation parameter for Ir-192 gamma source in shielding materials
Conclusion: In conclusion, a 10 cm thickness of clay and clay-polyethylene mixture is sufficient to attenuate 87% and 89% of photons from Ir-192 source. The calculated linear attenuation coefficients for the three shielding materials are also consistently higher, about 7.5%, than that of the XCOM value for 380 keV photon. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - March 31, 2022 Category: Physics Authors: Adila Hanim Aminordin Sabri MZ Abdul Aziz SF Olukotun SM Tajudin Source Type: research
Design and evaluation of structural shielding of a typical radiotherapy facility using egsnrc monte carlo code
Conclusion: The findings in this study revealed that the EGSnrc MC code can be used as a veritable tool in the design and evaluation of structural shielding efficiency in a radiotherapy facility. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - March 31, 2022 Category: Physics Authors: Zaccheaus Ayo Ibitoye Margret Bose Adedokun Temitope Aminat Orotoye Godwin Bassey Udo Source Type: research
