Paradigm shift in radiation treatment planning over multiple treatment modalities
Benjamin Insley, I-Chow Hsu, J Adam Martin CunhaJournal of Medical Physics 2021 46(3):135-139The inverse planning simulated annealing optimization engine was used to develop a new method of incorporating biological parameters into radiation treatment planning. This method integrates optimization of a radiation schedule over multiple types of delivery methods into a single algorithm. We demonstrate a general procedure of incorporating a functional biological dose model into the calculation of physical dose prescriptions. This paradigm differs from current practice in that it combines biology-informed dose constraints with a...
Source: Journal of Medical Physics - September 8, 2021 Category: Physics Authors: Benjamin Insley I-Chow Hsu J Adam Martin Cunha Source Type: research
Obituary
Editorial Team JMP Journal of Medical Physics 2021 46(2):132-133 (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - August 7, 2021 Category: Physics Authors: Editorial Team JMP Source Type: research
Johns and cunningham & #39;s the physics of radiology
Sunil Dutt SharmaJournal of Medical Physics 2021 46(2):128-131 (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - August 7, 2021 Category: Physics Authors: Sunil Dutt Sharma Source Type: research
Variation in dosimeter calibration factor (Ndw) over a period of 20 years
In this study, the NDWfactor for two ion chambers, thimble type (Farmer) and parallel plate type (Markus), used in most of the radiotherapy centers, were retrospectively reviewed for 20 years. The calibration on all occasions except once was carried out at the Secondary Standards Dosimetry Laboratory, Bhabha Atomic Research Centre, Mumbai. The change in the NDWfactor over this period was < ±3%. We, therefore, believe that a dosimeter with no history of repairs showed reasonable stability in the NDWfactor over a long period. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - August 7, 2021 Category: Physics Authors: Manoj Kumar Semwal Harishchandra Gupta Sakshi Singhal Ashok Kumar Aruna Kaushik Source Type: research
Calculation of photoneutron contamination of varian linac in icru soft-tissue phantom using MCNPX code
Conclusion: According to this research, within the phantom; variation of fluence, DE and kerma in transverse direction were mild, and along the central axis at shallow area were sharp. DE of fast photoneutrons at shallow and deep areas were one order of magnitude greater than thermal photoneutrons. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - August 7, 2021 Category: Physics Authors: Mojtaba Cheraghian Tayyeb Pourfallah Amir Abbas Sabouri-Dodaran Mehrdad Gholami Source Type: research
The effect of algorithms on dose distribution in inhomogeneous phantom: Monaco treatment planning system versus monte carlo simulation
Conclusion: The effect of the algorithms used in TPS on dose distribution is very strong, especially in environment with high electron density variation and in applications such as Stereotactic Body Radiotherapy and Intensity Modulated Radiotherapy where small fields are used. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - August 7, 2021 Category: Physics Authors: Taylan Tu & #287;rul Source Type: research
Simultaneous optimization of radiation-imaging coincidence for a multi-energy linac
Conclusion: This work provides a method to adjust radiation-imaging coincidence within 1.0 mm for all energies on Elekta's Versa HD. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - August 7, 2021 Category: Physics Authors: Cory Knill Raminder Sandhu Robert Halford Michael Snyder Danielle Lack Source Type: research
Impact of acquisition protocols on accuracy of dose calculation based on xvi cone beam computed tomography
Conclusions: The choice of the adequate CBCT acquisition protocol and the appropriate phantom to determine the HU-ReD calibration curve provides a better precision in the calculation of dose on CBCT images. This allows improving the results obtained when using the HU-ReD calibration method for dose calculation in adaptive radiotherapy. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - August 7, 2021 Category: Physics Authors: Slimani Souleyman Khalal Dorea Maria Tyeb Cheikh Khalal-Kouache Karima Source Type: research
Indigenous groin board immobilization reduces planning target volume margins in groin radiotherapy
Conclusions: GIB brings concordance in shifts between pelvis and groin and between bilateral groins, thereby reducing the required PTV margins. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - August 7, 2021 Category: Physics Authors: Rahul Krishnatry Akshay Mangaj Rajesh Bhajbhuje Vedang Murthy Source Type: research
Automatic detection and tracking of marker seeds implanted in prostate cancer patients using a deep learning algorithm
Conclusion: Our study shows that deep learning can be used to detect fiducial marker seeds in kV images in real time. This is an ongoing study, and work is underway to extend it to other sites for tracking moving structures with minimal effort. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - August 7, 2021 Category: Physics Authors: Keya Amarsee Prabhakar Ramachandran Andrew Fielding Margot Lehman Christopher Noble Ben Perrett Daryl Ning Source Type: research
Comparison of phase-gated and amplitude-gated dose delivery to a moving target using gafchromic EBT3 film
Conclusion: Amplitude-gated DCAT allows for better dosimetric accuracy over phase-gated treatment patients with regular breathing patterns. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - August 7, 2021 Category: Physics Authors: Milovan Savanovi & #263; Dra & #382;an Jaro & #353; Jean Noel Foulquier Source Type: research
Customization of a model for knowledge-based planning to achieve ideal dose distributions in volume modulated arc therapy for pancreatic cancers
Conclusions: Selecting plans to register in a model by analyzing dosimetry and geometry is an effective means of improving the KBP model. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - August 7, 2021 Category: Physics Authors: Yuya Nitta Yoshihiro Ueda Masaru Isono Shingo Ohira Akira Masaoka Tsukasa Karino Shoki Inui Masayoshi Miyazaki Teruki Teshima Source Type: research
Is maximum intensity projection an optimal approach for internal target volume delineation in lung cancer ?
Conclusion: ITV using MIP is significantly smaller and may miss a tumor compared to ITV delineation in 10 phases of 4D-CT. However, the time required is significantly less with MIP. Caution should be exercised in tumors proximity to the mediastinum, chest wall, and diaphragm. (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - August 7, 2021 Category: Physics Authors: Anil Tibdewal Sabheen Bushra Naveen Mummudi Rajesh Kinhikar Yogesh Ghadi Jai Prakash Agrawal Source Type: research
Book review of the modern technology of radiation oncology (Volume 4): A compendium for medical physicists and radiation oncologists for the Journal of Medical Physics
Rajesh A KinhikarJournal of Medical Physics 2021 46(1):55-57 (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - May 5, 2021 Category: Physics Authors: Rajesh A Kinhikar Source Type: research
Role of LQ model to address effect of missed treatment days in external-beam radiotherapy
Ramamoorthy Ravichandran, Tarani Mondal, Bandana Barman, Gopal Datta, Ravi KannanJournal of Medical Physics 2021 46(1):52-54 (Source: Journal of Medical Physics)
Source: Journal of Medical Physics - May 5, 2021 Category: Physics Authors: Ramamoorthy Ravichandran Tarani Mondal Bandana Barman Gopal Datta Ravi Kannan Source Type: research
