Investigation of different factors affecting the quality of spect images: A simulation study
Conclusion: The MC simulation is a suitable tool for investigation of different factors affecting the quality of SPECT images, essentially in the studies based on the energy spectrum, such as the evaluation of the scatter correction methods. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - March 13, 2020 Category: Physics Authors: Mahsa Noori-Asl Source Type: research

A method of high-resolution radiotherapy delivery fluences with a pair of fields with orthogonal collimator settings: A study on ten head-and-neck cancer patients
Conclusions: At the time of writing of this study, there were more than 12,000 medical linear accelerators in clinical use, and XMLC can prove itself useful wherever linac is equipped with MLC but cannot delivery latest techniques, such as volumetric modulated arc therapy. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - March 13, 2020 Category: Physics Authors: Stipe Galic Marin Kovacevic Ivan Lasic Hrvoje Brkic Dario Faj Source Type: research

Validation of PRIMO monte carlo model of clinac & #174;ix 6mv photon beam
Conclusions: This study shows that the research software PRIMO can be used as a treatment planning system-independent quality assurance and dose verification tool in daily clinical practice. Further validation will be performed with different energies, complex multileaf collimators fields, and with dynamic treatment fields. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - March 13, 2020 Category: Physics Authors: B Sarin B Bindhu B Saju Raguram K Nair Source Type: research

Development and validation of a matlab software program for decoding the treatment errors in real-time position management & #8482; Gating-generated breathing trace
Conclusion: The developed GUI gave the same and acceptable results for all regular profiles. These errors were due to the lag time of the linear accelerator with gating treatment. This program can be used as to quantifying the intrafraction “beam-on” errors in breathing trace with both mode of gating techniques for irregular breathing trace, and in addition, it is capable to convert phase-based gating parameters to amplitude-based gating parameters for treatment. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - March 13, 2020 Category: Physics Authors: Naveen Kumawat Anil Kumar Shrotriya Malhotra Singh Heigrujam Kartikeswar Patro Satendra Kumar Anil Kumar Bansal Ram Kishan Munjal Anil Kumar Anand Source Type: research

Dosimetric Comparison of treatment plans computed with finite size pencil beam and monte carlo algorithms using the incise & #8482; multileaf collimator-equipped cyberknife & #174; system
Conclusion: In this study, it was found that FSPB overestimates dose to inhomogeneous treatment sites. This indicates, the employment of MC algorithm in CK-MLC-based lung SABR treatment plans is strongly suggested. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - March 13, 2020 Category: Physics Authors: Kalpani Nisansala Udeni Galpayage Dona Charles Shang Theodora Leventouri Source Type: research

Volumetric arc therapy treatment plan dosimetry correction method to account patient weight loss during a course of radiation therapy
Conclusion: Image-guided radiation therapy process detects the weight loss, which affects the treatment plan's dose distribution and should be corrected. Applying the correction method described here keeps the patient dosimetry within 1% of the original plan, which is clinically acceptable. The process of plan dosimetry correction to address weight loss can be completed within 30 min without repeating imaging and planning process. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - March 13, 2020 Category: Physics Authors: Harold DSouza Henry Weatherburn Abhishek Dwivedi Tharmarnadar Ganesh Source Type: research

A primer on theory and operation of linear accelerators in radiation therapy
Challapalli SrinivasJournal of Medical Physics 2019 44(4):298-299 (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - December 11, 2019 Category: Physics Authors: Challapalli Srinivas Source Type: research

Assessment of adult diagnostic reference levels for panoramic radiography in Tamil Nadu region
Conclusion: The present study suggests that further optimization can be achieved in many centers by the recruitment of professionally qualified radiographers and conducting periodic training programs on the optimization of exposure parameters. Considering this as the first study for the dental DRL assessment, further studies are suggested to establish national dental DRL in India. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - December 11, 2019 Category: Physics Authors: Amal Jose A Saravana Kumar KN Govindarajan B Devanand N Elango Source Type: research

A dosimetric analysis of the rectal doses in intracavitary brachytherapy of carcinoma cervix: A prospective study from a single institute
Conclusion: The modified ICRU rectal point is easier to visualize than ICRU 38 method (100% vs. 80%) for dosimetry, but it underestimates the rectal doses when compared to ICRU 38 rectal point. There needs to be a correction factor applied (25% in our study for Henschke applicator) when evaluating the rectal doses calculated by rectal wire method, to reduce the rectal toxicity. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - December 11, 2019 Category: Physics Authors: Aparna Suryadevara Anil Kumar Talluri Krishnam Raju Alluri E Vasundhara Sudhakar Kumar N V.N Madhusudhana Sresty Source Type: research

4 & #960; radiotherapy using a linear accelerator: A misnomer in violation of the solid geometric boundary conditions in three-dimensional Euclidean space
Conclusions: Present cantilever design of linear accelerator prevents achieving a 4π radian solid angle at any point in the patient. Even the most modern therapy machines like CyberKnife which has a robotic arm also cannot achieve 4π geometry. Maximum achievable solid angle under the highest allowable boundary condition(s) cannot exceed 2πc, which is restricted for only extremities such as foot and brain radiotherapy. For other parts of the body such as pelvis, thorax, and abdomen, the solid angle is reduced to 1/5th (maximum value) of the 4πc. To obtain a 4πc solid angle in a three-dimensional Euc...
Source: Journal of Medical Physics - December 11, 2019 Category: Physics Authors: Biplab Sarkar Tharmarnadar Ganesh Anusheel Munshi Arjunan Manikandan Bidhu Kalyan Mohanti Source Type: research

The impact of positron emission tomography/computed tomography addition to contrast-enhanced computed tomography findings during radiation treatment planning of locally advanced carcinoma esophagus
Conclusions: PET-CT tremendously changes treatment plans by expanding the gross tumor volume and including regions which might otherwise have been missed on purely CT-based plans. Of the 50 patients, it changed the contouring and treatment planning of 35 patients and did not impact the remaining 15. Whether this translates into better long-term controls requires further validation by randomized controlled trials, which was not our present objective. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - December 11, 2019 Category: Physics Authors: Sharad Bhatnagar Shweta Sharma Manoj Semwal Sankalp Singh Source Type: research

Establishment of a new three-dimensional dose evaluation method considering variable relative biological effectiveness and dose fractionation in proton therapy combined with high-dose-rate brachytherapy
Conclusions: Our dose evaluation method can evaluate the EQD2LQLconsidering RBE changes in the dose distribution. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - December 11, 2019 Category: Physics Authors: Daisuke Kobayashi Tomonori Isobe Kenta Takada Yutaro Mori Hideyuki Takei Hiroaki Kumada Satoshi Kamizawa Tetsuya Tomita Eisuke Sato Hiroshi Yokota Takeji Sakae Source Type: research

Characterization of the mixed radiation field produced by carbon and oxygen ion beams of therapeutic energy: A Monte Carlo simulation study
Conclusions: This result coupled with the higher RBE shows that it may be possible to use a lower fluence of oxygen ions to achieve the same therapeutic dose in the patient as that obtained with carbon ion therapy. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - December 11, 2019 Category: Physics Authors: CK Ying David Bolst Anatoly Rosenfeld Susanna Guatelli Source Type: research

Dose shadowing and prosthesis involvement for megavoltage photon In vivo diode dosimetry
Conclusion: On the basis of accuracy requirements in radiotherapy noting that a small underdose to tumors could yield a decrease in the probability of tumor control, the diode-induced beam perturbations in combination with prosthesis involvement in the photon fields may affect treatment outcome, as there would be a reduction in the prescribed target dose during treatment delivery. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - December 11, 2019 Category: Physics Authors: Nicholas Ade Dete Van Eeden F C. P. Du Plessis Source Type: research

Experimental determination of radial dose function and anisotropy function of GammaMed Plus 192Ir high-dose-rate brachytherapy source in a bounded water phantom and its comparison with egs_brachy Monte Carlo simulation
Conclusion: Our experimental phantom size represents the average patient width of 30 cm; hence, results are closer to scattering conditions in clinical situations. The experimentally measured g(r) and F(r,θ) and egs_brachy MC calculations for bounded geometry are well in agreement within experimental uncertainties. Further, the confidence level of our comparative study is enhanced by validating the egs_brachy MC code for the unbounded phantom with respect to consensus data. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - December 11, 2019 Category: Physics Authors: Rekha Reddy Buchapudi Ravikumar Manickam Varatharaj Chandaraj Source Type: research

Estimation of backscatter from internal shielding in electron beam radiotherapy using Monte Carlo simulations (EGSnrc) and Gafchromic film measurements
Conclusions: This study provides an important clinical data to design internal shielding at the local clinical setup and confirms applicability of MC simulations in backscatter dose calculations at interfaces where physical measurements are difficult to perform. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - December 11, 2019 Category: Physics Authors: Sukhvir Singh Manoj Kumar Semwal CP Bhatt Source Type: research

Simple electronic portal imager-based pretreatment quality assurance using Acuros XB: A feasibility study
Conclusion: EPID dosimetry produced an inferior result due to no heterogeneity corrections for sites such as the lung and esophagus. Incorporating TPS-based heterogeneity correction improved the EPID dosimetry result for those sites with large heterogeneity. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - December 11, 2019 Category: Physics Authors: Arjunan Manikandan Sureka Chandra Sekaran Biplab Sarkar Sujatha Manikandan Source Type: research

The physics of CT dosimetry: CTDI and beyond
Gurpreet SinghJournal of Medical Physics 2019 44(3):228-229 (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - September 13, 2019 Category: Physics Authors: Gurpreet Singh Source Type: research

Evaluation and validation of IBA I & #39;MatriXX array for patient-specific quality assurance of tomotherapy & #174;
N V. N Madhusudhana Sresty, A Krishnam Raju, B Nagarjuna Reddy, VC Sahithya, Yakub Mohmd, G Deleep Kumar, T Anil Kumar, Tasneem Rushdi, S Aparna, G Durga Prasad, Harjot Kaur BajwaJournal of Medical Physics 2019 44(3):222-227TomoTherapy® is a modern radiation treatment technique in which intensity-modulated radiation therapy (IMRT) is delivered in helical fashion. A two-dimensional (2D) array which has been existing for IMRT patient-specific quality assurance (PSQA) verifications for many years is I'MatriXX. Our objectives were to validate this I'MatriXX and to evaluate it for different patient sites and fracti...
Source: Journal of Medical Physics - September 13, 2019 Category: Physics Authors: N V. N Madhusudhana Sresty A Krishnam Raju B Nagarjuna Reddy VC Sahithya Yakub Mohmd G Deleep Kumar T Anil Kumar Tasneem Rushdi S Aparna G Durga Prasad Harjot Kaur Bajwa Source Type: research

Evaluation of healthy tissue dose at different regions between volumetric-modulated arc therapy and intensity-modulated radiation therapy plans in the treatment of various cancers
Conclusions: VMAT plan can reduce the risk of secondary malignancy while treating different sites of cancer. VMAT is the most appropriate technique than IMRT, especially in the treatment of large tumor volume. Special attention has to be given, especially while treating women and children. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - September 13, 2019 Category: Physics Authors: Jayapalan Krishnan Suresh Rao Sanath Hegde Jayarama Shetty Source Type: research

Calibration of gafchromic EBT film using the Microtek ScanMaker 9800XL plus flatbed scanner with a modified one red-channel after three-channel method
Conclusion: The proposed technique allows the use of the three-channel method to calibrate film using a Microtek 9800XL+ scanner. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - September 13, 2019 Category: Physics Authors: Liyun Chang Sheng-Yow Ho Hueisch-Jy Ding Shyh-An Yeh Pang-Yu Chen Source Type: research

A Model-based method for assessment of salivary gland and planning target volume dosimetry in volumetric-modulated arc therapy planning on head-and-neck cancer
This study examined the relationship of achievable mean dose and percent volumetric overlap of salivary gland with the planning target volume (PTV) in volumetric-modulated arc therapy (VMAT) plan in radiotherapy for a patient with head-and-neck cancer. The aim was to develop a model to predict the viability of planning objectives for both PTV coverage and organs-at-risk (OAR) sparing based on overlap volumes between PTVs and OARs, before the planning process. Forty patients with head-and-neck cancer were selected for this retrospective plan analysis. The patients were treated using 6 MV photons with 2-arc VMAT plan in pres...
Source: Journal of Medical Physics - September 13, 2019 Category: Physics Authors: Honglai Zhang Yijian Cao Jeffrey Antone Adam C Riegel Maged Ghaly Louis Potters Abolghassem Jamshidi Source Type: research

A novel design of N-fiducial phantom for automatic ultrasound calibration
Conclusions: The results showed that our proposed method has a high efficiency to perform automatic feature extraction compared to conventional extraction performed by humans. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - September 13, 2019 Category: Physics Authors: Maria Chatrasingh Jackrit Suthakorn Source Type: research

Correlation between biological effective dose and radiation-induced liver disease from hypofractionated radiotherapy
Conclusion: The strong correlations of the V10Gy and V15Gy PD-volume metrics as well as the V16.7Gy3(BED of V10Gy) to both classic and chronic RILD imply the appropriateness of the current 15Gy evaluation level for liver toxicity with hypo-fractionated treatments. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - September 13, 2019 Category: Physics Authors: Angelo M Bergamo Kevin Kauweloa Gregory Gan Zheng Shi Janeen Daniels Richard Crownover Ganesh Narayanasamy Sotirios Stathakis Panayiotis Mavroidis Niko Papanikolaou Alonso Gutierrez Source Type: research

Electronic portal imaging device-based three-dimensional volumetric dosimetry for intensity-modulated radiotherapy pretreatment quality assurance
Conclusion: The novel TPS-based heterogeneity correction can improve the 2D and 3D EPID-based back projection technique. Structures with large heterogeneities can also be handled using the proposed technique. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - September 13, 2019 Category: Physics Authors: Manikandan Arjunan Sureka Chandra Sekaran Biplab Sarkar Saran Kumar Manavalan Source Type: research

Out-of-field dose calculation by a commercial treatment planning system and comparison by monte carlo simulation for varian TrueBeam & #174;
Conclusion: In this work, it was observed that the TPS underestimates doses beyond the edges of treatment fields for a clinical treatment executed on a TB machine. This indicates that the out-of-field dose from TPSs should only be used with a clear understanding of the inaccuracy of dose calculations beyond the edge of the field. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - September 13, 2019 Category: Physics Authors: NS Shine Raghukumar Paramu M Gopinath RC Jaon Bos PM Jayadevan Source Type: research

An experimental slope method for a more accurate measurement of relative radiation doses using radiographic and radiochromic films and its application to megavoltage small-field dosimetry
Conclusions: The authors have developed a novel and more accurate method for the relative dosimetry of photon and electron beams. This offers a unique method to determine PDD and ROF with a high spatial resolution in fields of steep dose gradient, especially in small fields. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - September 13, 2019 Category: Physics Authors: Raghavendra Holla D Khanna Bhaskaran K Pillai KV Jafar Ali PS Renil Mon CO Clinto Tharmarnadar Ganesh Source Type: research

Basic physics and radiation safety in nuclear medicine
Ajai Kumar ShuklaJournal of Medical Physics 2019 44(2):142-143 (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - June 11, 2019 Category: Physics Authors: Ajai Kumar Shukla Source Type: research

Clinical three-dimensional dosimetry in modern radiation therapy
Tharmarnadar GaneshJournal of Medical Physics 2019 44(2):139-141 (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - June 11, 2019 Category: Physics Authors: Tharmarnadar Ganesh Source Type: research

External beam radiotherapy with telecobalt machine: Tissue deficiency compensation in head-and-neck region and effect on skin reactions
Ramamoorthy Ravichandran, Bandana Barman, Gopal Datta, Ravi KannanJournal of Medical Physics 2019 44(2):135-138 (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - June 11, 2019 Category: Physics Authors: Ramamoorthy Ravichandran Bandana Barman Gopal Datta Ravi Kannan Source Type: research

Validation of the RapidArc delivery system using a volumetric phantom as per task group report 119 of the American association of physicists in medicine
Conclusion: Thus, the ArcCHECK can successfully be utilized for the validation of the RA delivery. The AXB has potential to perform dose calculations comparable to those of the AAA for RA plans in the homogeneous medium of the ArcCHECK phantom. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - June 11, 2019 Category: Physics Authors: Lalit Kumar Girigesh Yadav Vimal Kishore Manindra Bhushan Munish Gairola Deepak Tripathi Source Type: research

Impact of silver nanoparticles on the ultraviolet radiation direct and bystander effects on TK6 cell line
Conclusions: Our findings showed the induced DNA damage in TK6 cell by AgNPs and UVC radiation and also were seen BSE. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - June 11, 2019 Category: Physics Authors: Zohreh Eftekhari-Kenzerki Reza Fardid Abbas Behzad-Behbahani Source Type: research

Probing the effects of ionizing radiation on young & #39;s modulus of human erythrocytes cytoskeleton using atomic force microscopy
Conclusions: The elastic modulus of the erythrocytes could be an indicator of the adverse effect in the human blood generated by IR exposure through a radiotherapy treatment. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - June 11, 2019 Category: Physics Authors: Ellas Spyratou Maria Dilvoi George Patatoukas Kalliopi Platoni Mersini Makropoulou Efstathios Petros Efstathopoulos Source Type: research

Multi-energy computed tomography breast imaging with Monte Carlo simulations: Contrast-to-noise-based image weighting
Conclusions: The new proposed CNR-based image weighting scheme is easy to implement and can be used for complicated phantoms with varying structures. A large increase in the CNR is seen with or without the use of iodine contrast. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - June 11, 2019 Category: Physics Authors: D & #233;te Van Eeden Freek C. P Du Plessis Source Type: research

Performance validation of in-house developed four-dimensional dynamic phantom
Conclusions: The mechanical and imaging performances of FDDP were found within the acceptable limits. Therefore, this phantom can be used for quality assurance of 4D imaging process in radiotherapy. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - June 11, 2019 Category: Physics Authors: Rahul Kumar Chaudhary Rajesh Kumar SD Sharma Soumen Bera Vikram Mittal Sudesh Deshpande Source Type: research

Clinical evaluation of a two-dimensional liquid-filled ion chamber detector array for verification of high modulation small fields in radiotherapy
Conclusions: The Octavius 1000 SRS is a dosimetrically accurate device to perform quality assurance checks in SBRT treatments. The broad range of measurements performed in this study quantified the dosimetric accuracy of Octavius 1000 SRS detector in the clinical setup of the small fields in radiotherapy. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - June 11, 2019 Category: Physics Authors: Miljenko Markovic Ganesh Narayanasamy Sotirios Stathakis Panayiotis Mavroidis Ines-Ana Jurkovic Daniel Saenz Niko Papanikolaou Source Type: research

Dosimetric effect of rotational setup errors in single-isocenter volumetric-modulated arc therapy of multiple brain metastases
Conclusion: Our results indicate that correcting rotational uncertainties is critical in single-isocenter, multi-target SRS. For rotational deviations, radial distance of the target from isocenter along the respective axis has a strong influence on target coverage. For rotational setup deviation at a given radial distance larger targets tend to have lesser geometric miss compared to smaller targets. Mathematical model for spherical targets can be used to estimate V95 for given rotational errors. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - June 11, 2019 Category: Physics Authors: Kasirajan Tamil Selvan Ganesan Padma Murugesan Kesavan Revathy N Arunai Nambi Raj K Senthilnathan P Ramesh Babu Source Type: research

Investigation of internal target volumes using device and deviceless four-dimensional respiratory monitoring systems for moving targets in four-dimensional computed tomography acquisition
Conclusion: The results showed that the DL method is an effective way of image sorting in 4D acquisition for smaller target excursion. When the target motion exceeds 3 mm in A-P and L-R directions with S-I more than 10 mm, DB method is the choice due to its accuracy in reproducing the absolute target volume. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - June 11, 2019 Category: Physics Authors: Raghavendra Holla D Khanna Shubhangi Barsing Bhaskaran K Pillai Tharmarnadar Ganesh Source Type: research

Study on measurement of environmental radioactivity and assessment of radiological hazards in Kashmir Valley
Gopiraj AnnamalaiJournal of Medical Physics 2019 44(1):70-70 (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - March 11, 2019 Category: Physics Authors: Gopiraj Annamalai Source Type: research

Fabrication and characterization of a three-dimensional positive-ion detector and its applications
Kulandaivel MuthuveluJournal of Medical Physics 2019 44(1):68-69 (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - March 11, 2019 Category: Physics Authors: Kulandaivel Muthuvelu Source Type: research

Determination of optimal clinical target volume to planning target volume margins for conformal radiotherapy planning using image guidance system in rectal cancer in prone position
Conclusions: Image guidance is an effective method to evaluate patient setup errors. Good quality immobilization devices and stringent patient setup policies can help to reduce PTV margins further. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - March 11, 2019 Category: Physics Authors: Shashank Bansal Mouchumee Bhattacharyya Apurba Kumar Kalita Moirangthem Nara Singh Rubu Sunku Partha Pratim Medhi Ghritashee Bora Source Type: research

Radiation shielding for helical tomotherapy vault design
Conclusions: A typical helical tomotherapy vault design is proposed based on the calculated shielding thicknesses of protective barriers. Further, it is also concluded that tomotherapy machine can be installed in a vault designed for 6 MV conventional linear accelerator with minor modification. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - March 11, 2019 Category: Physics Authors: Amanjot Kaur PN Pawaskar G Sahani Source Type: research

Development of a method to determine electron density and effective atomic number of high atomic number solid materials using dual-energy computed tomography
Conclusions: DECT can be used as an effective tool for determining the effective atomic number and electron density of high atomic number substance. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - March 11, 2019 Category: Physics Authors: Avinav Bharati Susama Rani Mandal Arun Kumar Gupta Amlesh Seth Raju Sharma Ashu S Bhalla Chandan J Das S Chatterjee Pratik Kumar Source Type: research

Phantom-based feasibility studies on phase-contrast mammography at Indian synchrotron facility indus-2
Conclusion: It was observed in case of all the phantoms and test samples that EEI and EE/N values are relatively higher for images taken in the phase mode. The absorbed dose to air at imaging plane was found to be 75.59 mGy and 28.9 mGy for 12 and 16 keV SR energies, respectively. However, these dose values can be optimized by reducing the image acquisition time without compromising the image quality when clinical samples are imaged. This work demonstrates the feasibility of XPCI in mammography using 12 and 16 keV SR X-ray beams. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - March 11, 2019 Category: Physics Authors: Reena Sharma SD Sharma PS Sarkar B Singh AK Agrawal D Datta Source Type: research

Effective dose display system in gastric cancer X-ray screening
Conclusions: “Effective dose display system” was constructed to display effective dose immediately after gastric cancer X-ray screening. This system is on the way to be reformed by improving the regression equation on larger data. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - March 11, 2019 Category: Physics Authors: Kenyu Yamamoto Naoko Fujiwara Masahiko Kiyama Yoshihiro Takeda Tadao Kuwano Toshizo Katsuda Masami Azuma Toshinori Ito Source Type: research

Evaluation of nanoDot optically stimulated luminescence dosimeter for cone-shaped small-field dosimetry of cyberknife stereotactic radiosurgery unit: A monte carlo simulation and dosimetric verification study
Conclusion: Its low reliable readings for cones smaller than 15 mm should be considered before its in vivo applications of Cyberknife system. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - March 11, 2019 Category: Physics Authors: Fadil Akyol Neslihan Sarigul Mete Yeginer Yagiz Yedekci Haluk Utku Source Type: research

Extraction of retinal blood vessels on fundus images by kirsch & #39;s template and Fuzzy C-Means
Conclusion: The results show that this approach is a suitable alternative technique for the supervised method and it is support for similar fundus images dataset. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - March 11, 2019 Category: Physics Authors: T Jemima Jebaseeli C Anand Deva Durai J Dinesh Peter Source Type: research

Validation of three-dimensional electronic portal imaging device-based PerFRACTION & #8482; software for patient-specific quality assurance
Conclusions: PerFRACTIONTM appears reliable and valid under experimental conditions in air and with phantoms. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - March 11, 2019 Category: Physics Authors: A Aziz Sait Jason Figueredo Glenn W Jones Kai Jones Thomas McGowan Jeff Kapatoes Ramani Ramaseshan Source Type: research

Pretreatment dose verification in volumetric modulated arc therapy using liquid ionization chamber
Conclusions: The measured dose values by the two dosimeters and TPS calculated dose at a given point were found comparable suggesting that the LIC could be a good choice of dosimeter for pretreatment dose verification in VMAT. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - March 11, 2019 Category: Physics Authors: Nitin R Kakade Rajesh Kumar Sunil Dutt Sharma Vikram Mittal D Datta Source Type: research

Dosimetric comparison of four volumetric-modulated arc therapy beam arrangements utilized for hippocampal-sparing whole-brain radiation therapy
Conclusions: Overall, beam setup 3 was considered to be the best. It is worth mentioning that, apart from our results, the election of one of these beam arrangements might be dependent on the amount of patient workload at a specific institution. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - March 11, 2019 Category: Physics Authors: Alejandro Prado Ana Isabel Milan & #233;s Eduardo Cabello Ra & #250;l D & #237;az Alejandro Ferrando Gustavo Pozo Mario Leonor Marta Manzano Source Type: research