A retrospective study on the investigation of potential dosimetric benefits of online adaptive proton therapy for head and neck cancer
CONCLUSION: The results of our retrospective study have demonstrated that online APT can better address anatomical changes for HN cancer patients than the current offline replanning practice. The advanced artificial intelligence based automatic replanning technology presents a promising avenue for extending potential benefits of online APT.PMID:38368614 | DOI:10.1002/acm2.14308 (Source: Journal of Applied Clinical Medical Physics)
Source: Journal of Applied Clinical Medical Physics - February 18, 2024 Category: Physics Authors: Chih-Wei Chang Duncan Bohannon Zhen Tian Yinan Wang Mark W Mcdonald David S Yu Tian Liu Jun Zhou Xiaofeng Yang Source Type: research

Technical note: Minimizing CIED artifacts on a 0.35 T MRI-Linac using deep learning
CONCLUSION: CycleGAN-generated reconstructions significantly improved both tracking and image quality metrics when used to mitigate artifacts from ICDs.PMID:38368615 | DOI:10.1002/acm2.14304 (Source: Journal of Applied Clinical Medical Physics)
Source: Journal of Applied Clinical Medical Physics - February 18, 2024 Category: Physics Authors: Austen N Curcuru Deshan Yang Hongyu An Phillip S Cuculich Clifford G Robinson H Michael Gach Source Type: research

Technical note: SpekPy Web-online x-ray spectrum calculations using an interface to the SpekPy toolkit
J Appl Clin Med Phys. 2024 Feb 16:e14301. doi: 10.1002/acm2.14301. Online ahead of print.ABSTRACTKnowledge of the photon spectrum emitted from an x-ray tube is frequently needed in imaging and dosimetry contexts. As the spectrum characteristics are influenced by several parameters and routine measurement of a spectrum is often impractical, a variety of software programs have been developed over the decades for convenient calculations. SpekPy is a state-of-the-art software package containing several spectrum models, and was created to estimate photon spectra originating from x-ray tubes using a small set of input parameters...
Source: Journal of Applied Clinical Medical Physics - February 16, 2024 Category: Physics Authors: Robert Vorbau Gavin Poludniowski Source Type: research

Influence of dose calculation algorithms on the helical diode array using volumetric-modulated arc therapy for small targets
CONCLUSION: The behavior of the dose distribution on the helical diode array differed depending on the dose calculation algorithm for small targets. Measurements using ArcCHECK for VMAT with small targets can have lower GPRs owing to the coarse dose resolution of AXB around the detector area.PMID:38363044 | DOI:10.1002/acm2.14307 (Source: Journal of Applied Clinical Medical Physics)
Source: Journal of Applied Clinical Medical Physics - February 16, 2024 Category: Physics Authors: Tomohiro Ono Hideaki Hirashima Takanori Adachi Hiraku Iramina Takahiro Fujimoto Megumi Uto Mitsuhiro Nakamura Takashi Mizowaki Source Type: research

Technical note: SpekPy Web-online x-ray spectrum calculations using an interface to the SpekPy toolkit
J Appl Clin Med Phys. 2024 Feb 16:e14301. doi: 10.1002/acm2.14301. Online ahead of print.ABSTRACTKnowledge of the photon spectrum emitted from an x-ray tube is frequently needed in imaging and dosimetry contexts. As the spectrum characteristics are influenced by several parameters and routine measurement of a spectrum is often impractical, a variety of software programs have been developed over the decades for convenient calculations. SpekPy is a state-of-the-art software package containing several spectrum models, and was created to estimate photon spectra originating from x-ray tubes using a small set of input parameters...
Source: Journal of Applied Clinical Medical Physics - February 16, 2024 Category: Physics Authors: Robert Vorbau Gavin Poludniowski Source Type: research

Influence of dose calculation algorithms on the helical diode array using volumetric-modulated arc therapy for small targets
CONCLUSION: The behavior of the dose distribution on the helical diode array differed depending on the dose calculation algorithm for small targets. Measurements using ArcCHECK for VMAT with small targets can have lower GPRs owing to the coarse dose resolution of AXB around the detector area.PMID:38363044 | DOI:10.1002/acm2.14307 (Source: Journal of Applied Clinical Medical Physics)
Source: Journal of Applied Clinical Medical Physics - February 16, 2024 Category: Physics Authors: Tomohiro Ono Hideaki Hirashima Takanori Adachi Hiraku Iramina Takahiro Fujimoto Megumi Uto Mitsuhiro Nakamura Takashi Mizowaki Source Type: research

Implementation of a patient safety training program in radiation oncology residency: A pilot study
CONCLUSIONS: We report a successful implementation of a safety training program in a RO residency with significant improvements in self-reported confidence with the concepts of ILS, RCA, and FMEA and an improved perception of safety culture. This program can be implemented across all residency programs.PMID:38358132 | DOI:10.1002/acm2.14286 (Source: Journal of Applied Clinical Medical Physics)
Source: Journal of Applied Clinical Medical Physics - February 15, 2024 Category: Physics Authors: Imran H Chowdhury Rashi Garg Kathryn E Huber Nathaniel P Stambaugh Cassandra Stambaugh Source Type: research

Implementation of a patient safety training program in radiation oncology residency: A pilot study
CONCLUSIONS: We report a successful implementation of a safety training program in a RO residency with significant improvements in self-reported confidence with the concepts of ILS, RCA, and FMEA and an improved perception of safety culture. This program can be implemented across all residency programs.PMID:38358132 | DOI:10.1002/acm2.14286 (Source: Journal of Applied Clinical Medical Physics)
Source: Journal of Applied Clinical Medical Physics - February 15, 2024 Category: Physics Authors: Imran H Chowdhury Rashi Garg Kathryn E Huber Nathaniel P Stambaugh Cassandra Stambaugh Source Type: research

Assessing quality assurance of multi-leaf collimator using the structural similarity index
CONCLUSIONS: Our findings demonstrate that the SSI* exhibits greater sensitivity than the Gamma index test in detecting MLC positioning errors and dose changes between static and VMAT modes. The SSI* metric outperformed the Gamma index test regarding sensitivity across these parameters.PMID:38345201 | DOI:10.1002/acm2.14288 (Source: Journal of Applied Clinical Medical Physics)
Source: Journal of Applied Clinical Medical Physics - February 12, 2024 Category: Physics Authors: Hong Zhang Baoshe Zhang Giovanni Lasio Shifeng Chen Joubin Nasehi Tehrani Source Type: research

A CNN-based denoising method trained with images acquired with electron density phantoms for thin-sliced coronary artery calcium scans
CONCLUSION: Our results demonstrated that the electron density phantoms can be used to generate training data for the proposed CNN-based denoising method to reduce quantum noise for CAC scans reconstructed with 1.5-mm slice thickness. Because anthropomorphic phantom is not a necessity, our method could make image denoising more practical in routine clinical practice.PMID:38346094 | DOI:10.1002/acm2.14287 (Source: Journal of Applied Clinical Medical Physics)
Source: Journal of Applied Clinical Medical Physics - February 12, 2024 Category: Physics Authors: Ching-Ching Yang Kuei-Yuan Hou Source Type: research

Commissioning and implementing a Quality Assurance program for dedicated radiation oncology MRI scanners
CONCLUSION: An automated workflow and enhanced QA program allowed to automatically track machine and environmental changes over time and to detect periodic failures and errors that might otherwise have gone unnoticed. The Sola is more geometrically accurate, with a more homogenous B0 field than the Aera.PMID:38332556 | DOI:10.1002/acm2.14185 (Source: Journal of Applied Clinical Medical Physics)
Source: Journal of Applied Clinical Medical Physics - February 9, 2024 Category: Physics Authors: Eric Poulin Frederic Lacroix Louis Archambault Jean-David Jutras Source Type: research

Out of field scatter from electron applicator in modern linear accelerators
CONCLUSIONS: There are clinically significant peripheral doses around 3% of the central axis dose from the electron applicator. Elekta has a slightly higher scatter (3%) than Varian (2%) that peaks at 25 cm which is clinically important but often overlooked.PMID:38335230 | DOI:10.1002/acm2.14265 (Source: Journal of Applied Clinical Medical Physics)
Source: Journal of Applied Clinical Medical Physics - February 9, 2024 Category: Physics Authors: Bishwambhar Sengupta Greg DeFillippo James J Sohn Poonam Yadav Indra J Das Source Type: research

An IMRT planning technique for treating whole breast or chest wall with regional lymph nodes on Halcyon and Ethos
CONCLUSION: Institutional plan quality benchmarks were achieved for all eight cases using the IMRT-based planning approach. The IMRT-based planning approach offered superior conformity and OAR sparing than a competing hybrid 3D approach.PMID:38335253 | DOI:10.1002/acm2.14295 (Source: Journal of Applied Clinical Medical Physics)
Source: Journal of Applied Clinical Medical Physics - February 9, 2024 Category: Physics Authors: Kareem Rayn Ryan Clark Klea Hoxha Anthony Magliari Jack Neylon Michael H Xiang Dylan P O'Connell Source Type: research

Automatic image quality evaluation in digital radiography using for-processing and for-presentation images
CONCLUSIONS: Since IQ-scores of raw and their respective clinical images may be largely different, the same type of image should be consistently used for monitoring IQ constancy and when results from different X-ray systems are compared.PMID:38317593 | DOI:10.1002/acm2.14285 (Source: Journal of Applied Clinical Medical Physics)
Source: Journal of Applied Clinical Medical Physics - February 6, 2024 Category: Physics Authors: Ioannis A Tsalafoutas Shady AlKhazzam Virginia Tsapaki Mohammed Hassan Kharita Source Type: research

Automatic end-to-end VMAT treatment planning for rectal cancers
CONCLUSIONS: This study demonstrated that the VMAT treatment planning technique for rectal cancer can be automated to generate clinically acceptable and safe plans with minimal human interventions.PMID:38317597 | DOI:10.1002/acm2.14259 (Source: Journal of Applied Clinical Medical Physics)
Source: Journal of Applied Clinical Medical Physics - February 6, 2024 Category: Physics Authors: Kai Huang Christine Chung Ethan B Ludmir Lifei Zhang Constance A Owens Jean Gumma-De La Vega Jack Duryea Yao Zhao Xinru Chen David Fuentes Carlos E Cardenas Tina Marie Briere Sam Beddar Laurence E Court Prajnan Das Source Type: research