keyword
MENU ▼
Read by QxMD icon Read
search

Radiation risk from computers

keyword
https://www.readbyqxmd.com/read/29134367/imaging-of-cardiovascular-disease-in-pregnancy-and-the-peripartum-period
#1
REVIEW
Theodore Pierce, Meline Hovnanian, Sandeep Hedgire, Brian Ghoshhajra
Cardiovascular disease is an important cause of morbidity and mortality during pregnancy and the postpartum period. During pregnancy, the cardiovascular system undergoes extensive hemodynamic, hormonal, and microstructural changes which may exacerbate a preexisting underlying cardiovascular condition or predispose to cardiovascular complications not typically seen in young healthy women. Such conditions include spontaneous coronary artery dissection, atherosclerotic coronary artery disease, and peripartum cardiomyopathy...
November 14, 2017: Current Treatment Options in Cardiovascular Medicine
https://www.readbyqxmd.com/read/29121945/potential-dosimetric-benefits-of-adaptive-tumor-tracking-over-the-internal-target-volume-concept-for-stereotactic-body-radiation-therapy-of-pancreatic-cancer
#2
Konstantina Karava, Stefanie Ehrbar, Oliver Riesterer, Johannes Roesch, Stefan Glatz, Stephan Klöck, Matthias Guckenberger, Stephanie Tanadini-Lang
BACKGROUND: Radiotherapy for pancreatic cancer has two major challenges: (I) the tumor is adjacent to several critical organs and, (II) the mobility of both, the tumor and its surrounding organs at risk (OARs). A treatment planning study simulating stereotactic body radiation therapy (SBRT) for pancreatic tumors with both the internal target volume (ITV) concept and the tumor tracking approach was performed. The two respiratory motion-management techniques were compared in terms of doses to the target volume and organs at risk...
November 9, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/29114619/incorporating-big-data-into-treatment-plan-evaluation-development-of-statistical-dvh-metrics-and-visualization-dashboards
#3
Charles S Mayo, John Yao, Avraham Eisbruch, James M Balter, Dale W Litzenberg, Martha M Matuszak, Marc L Kessler, Grant Weyburn, Carlos J Anderson, Dawn Owen, William C Jackson, Randall Ten Haken
Purpose: To develop statistical dose-volume histogram (DVH)-based metrics and a visualization method to quantify the comparison of treatment plans with historical experience and among different institutions. Methods and materials: The descriptive statistical summary (ie, median, first and third quartiles, and 95% confidence intervals) of volume-normalized DVH curve sets of past experiences was visualized through the creation of statistical DVH plots. Detailed distribution parameters were calculated and stored in JavaScript Object Notation files to facilitate management, including transfer and potential multi-institutional comparisons...
July 2017: Advances in Radiation Oncology
https://www.readbyqxmd.com/read/29114609/dose-escalation-with-an-imrt-technique-in-15-to-28-fractions-is-better-tolerated-than-standard-doses-of-3dcrt-for-lapc
#4
Lauren E Colbert, Shalini Moningi, Awalpreet Chadha, Ahmed Amer, Yeonju Lee, Robert A Wolff, Gauri Varadhachary, Jason Fleming, Matthew Katz, Prajnan Das, Sunil Krishnan, Eugene J Koay, Peter Park, Christopher H Crane, Cullen M Taniguchi
Purpose: To review acute and late toxicities after chemoradiation for locally advanced pancreatic ductal adenocarcinoma in patients who were treated with escalated dose radiation (EDR). Methods and materials: Maximum Common Terminology Criteria for Adverse Events Version 4.0 acute toxicities (AT) during radiation and within 60 days after radiation were recorded for both acute gastrointestinal toxicity and overall toxicity (OT). Late toxicities were also recorded...
July 2017: Advances in Radiation Oncology
https://www.readbyqxmd.com/read/29103466/evaluation-of-cumulative-effective-dose-and-cancer-risk-from-repetitive-full-spine-imaging-using-eos-system-impact-to-adolescent-patients-of-different-populations
#5
Martin Law, Wang-Kei Ma, Eva Chan, Damian Lau, Candy Mui, Kenneth Cheung, Lawrance Yip, Wendy Lam
OBJECTIVE: To evaluate the effective dose and associated cancer risk using EOS system for scoliotic adolescent patients undergoing full spine imaging at different age of exposure; to demonstrate EOS system capable of delivering less radiation dose and hence of reducing cancer risk induction when compared with conventional digital X-ray systems; to obtain cumulative effective dose and cancer risk for both genders scoliotic adolescence of US and Hong Kong population. METHODS: Organ absorbed doses of full spine exposed scoliotic adolescent patients using EOS system have been simulated with the use of patient imaging parameters input to the Monte Carlo software PCXMC...
November 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/29102647/the-transcriptional-landscape-of-radiation-treated-human-prostate-cancer-analysis-of-a-prospective-tissue-cohort
#6
Simon P Keam, Franco Caramia, Cristina Gamell, Piotr J Paul, Gisela Mir Arnau, Paul J Neeson, Scott G Williams, Ygal Haupt
PURPOSE: The resistance of prostate cancer to radiation therapy (RT) is a significant clinical issue and still largely unable to be guided by patient-specific molecular characteristics. The present study describes the gene expression changes induced in response to RT in human prostate tissue obtained from a prospective tissue acquisition study designed for radiobiology research. METHODS AND MATERIALS: A prospective cohort of 5 men with intermediate-risk and clinically localized tumors were treated with high-dose-rate brachytherapy with 2 × 10-Gy fractions...
September 25, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/29100768/computed-tomography-scans-in-patients-with-young-adult-hip-pain-carry-a-lifetime-risk-of-malignancy
#7
James D Wylie, Peter A Jenkins, James T Beckmann, Christopher L Peters, Stephen K Aoki, Travis G Maak
PURPOSE: To calculate the lifetime risk of malignancy in young adult patients with hip pain using 5 different imaging and radiation dose protocols with or without pre- and postoperative computed tomography (CT). METHODS: Radiographic and CT patient radiation doses were retrospectively reviewed. Imaging protocols for hip pain composed of radiographs with or without pre- and postoperative CT scans were modeled and radiation doses were estimated using the PCXMC computer code...
October 31, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/29098485/idac-dose-2-1-an-internal-dosimetry-program-for-diagnostic-nuclear-medicine-based-on-the-icrp-adult-reference-voxel-phantoms
#8
Martin Andersson, Lennart Johansson, Keith Eckerman, Sören Mattsson
BACKGROUND: To date, the estimated radiation-absorbed dose to organs and tissues in patients undergoing diagnostic examinations in nuclear medicine is derived via calculations based on models of the human body and the biokinetic behaviour of the radiopharmaceutical. An internal dosimetry computer program, IDAC-Dose2.1, was developed based on the International Commission on Radiological Protection (ICRP)-specific absorbed fractions and computational framework of internal dose assessment given for reference adults in ICRP Publication 133...
November 3, 2017: EJNMMI Research
https://www.readbyqxmd.com/read/29096667/temporal-and-spatial-dose-distribution-of-radiation-pneumonitis-after-concurrent-radiochemotherapy-in-stage-iii-non-small-cell-cancer-patients
#9
Mohammed Alharbi, Stefan Janssen, Heiko Golpon, Michael Bremer, Christoph Henkenberens
BACKGROUND AND PURPOSE: Radiation pneumonitis (RP) is the most common subacute side effect after concurrent chemoradiotherapy (CRT) for locally advanced non-small cell lung cancer. Several clinical and dose-volume (DV) parameters are associated with a distinct risk of symptomatic RP. The aim of this study was to assess the spatial dose distribution of the RP volume from first occurence to maximum volume expansion of RP. MATERIAL AND METHODS: Between 2007 and 2015, 732 patients with lung cancer were treated in an institution...
November 2, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/29074552/occupational-exposures-and-mammographic-density-in-spanish-women
#10
Virginia Lope, Javier García-Pérez, Beatriz Pérez-Gómez, Ana María Pedraza-Flechas, Juan Alguacil, Mª Carmen González-Galarzo, Miguel Angel Alba, Rudolf van der Haar, Rosa Ana Cortés-Barragán, Carmen Pedraz-Pingarrón, Pilar Moreo, Carmen Santamariña, María Ederra, Carmen Vidal, Dolores Salas-Trejo, Carmen Sánchez-Contador, Rafael Llobet, Marina Pollán
OBJECTIVES: The association between occupational exposures and mammographic density (MD), a marker of breast cancer risk, has not been previously explored. Our objective was to investigate the influence of occupational exposure to chemical, physical and microbiological agents on MD in adult women. METHODS: This is a population-based cross-sectional study based on 1476 female workers aged 45-65 years from seven Spanish breast cancer screening programmes. Occupational history was surveyed by trained staff...
October 26, 2017: Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/29066051/impact-of-pretreatment-interstitial-lung-disease-on-radiation-pneumonitis-and-survival-in-patients-treated-with-lung-stereotactic-body-radiation-therapy-sbrt
#11
Daniel Glick, Stephen Lyen, Sonja Kandel, Shane Shapera, Lisa W Le, Patricia Lindsay, Olive Wong, Andrea Bezjak, Anthony Brade, B C John Cho, Andrew Hope, Alexander Sun, Meredith Giuliani
INTRODUCTION: The purpose of this study was to determine the impact of interstitial lung disease (ILD) on radiation pneumonitis (RP) and overall survival (OS) in lung stereotactic body radiation therapy (SBRT). METHODS: Patients treated with lung SBRT from 2004 to 2015 were included. Pretreatment computed tomography scans were reviewed and classified for interstitial changes by thoracic radiologists using American Thoracic Society guidelines and Washko and Kazerooni scores...
July 10, 2017: Clinical Lung Cancer
https://www.readbyqxmd.com/read/29055558/pelvic-fractures-after-definitive-and-postoperative-radiotherapy-for-cervical-cancer-a-retrospective-analysis-of-risk-factors
#12
Kasumi Yamamoto, Shoji Nagao, Kazuhiro Suzuki, Ai Kogiku, Tokihiro Senda, Hiroko Yano, Miho Kitai, Takaya Shiozaki, Kazuko Matsuoka, Satoshi Yamaguchi
OBJECTIVES: This study clarified the incidence of and identified the risk factors for post-radiation pelvic insufficiency fractures (PIFs) in women who received postoperative definitive or adjuvant radiotherapy (RT) for cervical cancer. PATIENTS AND METHODS: The medical records and data of imaging studies, including computed tomography scan and magnetic resonance imaging, of women with cervical cancer who received external-beam RT for the entire pelvic area between January 2003 and December 2012 at our institution were reviewed...
October 18, 2017: Gynecologic Oncology
https://www.readbyqxmd.com/read/29031916/image-guided-adaptive-external-beam-radiation-therapy-for-cervix-cancer-evaluation-of-a-clinically-implemented-plan-of-the-day-technique
#13
Martin Buschmann, Katarina Majercakova, Alina Sturdza, Stephanie Smet, Dina Najjari, Michaela Daniel, Richard Pötter, Dietmar Georg, Yvette Seppenwoolde
BACKGROUND: Radiotherapy for cervix cancer is challenging in patients exhibiting large daily changes in the pelvic anatomy, therefore adaptive treatments (ART) have been proposed. The aim of this study was the clinical implementation and subsequent evaluation of plan-of-the-day (POTD)-ART for cervix cancer in supine positioning. The described workflow was based on standard commercial equipment and current quality assurance (QA) methods. MATERIALS AND METHODS: A POTD strategy, which employs a VMAT plan library consisting of an empty bladder plan, a full bladder plan and a motion robust backup plan, was developed...
October 11, 2017: Zeitschrift Für Medizinische Physik
https://www.readbyqxmd.com/read/29027238/a-deep-convolutional-neural-network-using-directional-wavelets-for-low-dose-x-ray-ct-reconstruction
#14
Eunhee Kang, Junhong Min, Jong Chul Ye
PURPOSE: Due to the potential risk of inducing cancer, radiation exposure by X-ray CT devices should be reduced for routine patient scanning. However, in low-dose X-ray CT, severe artifacts typically occur due to photon starvation, beam hardening, and other causes, all of which decrease the reliability of the diagnosis. Thus, a high-quality reconstruction method from low-dose X-ray CT data has become a major research topic in the CT community. Conventional model-based de-noising approaches are, however, computationally very expensive, and image-domain de-noising approaches cannot readily remove CT-specific noise patterns...
October 2017: Medical Physics
https://www.readbyqxmd.com/read/29019888/an-upper-cervical-cord-compression-secondary-to-occult-follicular-thyroid-carcinoma-metastases-successfully-treated-with-multiple-radioiodine-therapies-a-clinical-case-report
#15
Ping Dong, Ni Chen, Lin Li, Rui Huang
RATIONALE: The spine is the most common site of bone metastases due to thyroid cancer; however, spinal cord compression as a complication of metastatic thyroid cancer is very rare. PATIENT CONCERNS: A 48-year-old female patient was presented to the Neurosurgical Department, complaining of progressive back neck pain with bilateral upper extremities numbness and weakness for 4 months. DIAGNOSIS: Imaging studies revealed osteolytic destruction in bodies and accessories of the second and third cervical vertebrae with a huge soft-tissue mass compressing spinal cord and causing swelling...
October 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28994399/contaminant-deposition-building-shielding-factors-for-us-residential-structures
#16
Elijah Dickson, David Hamby, Keith Eckerman
This paper presents validated building shielding factors designed for contemporary US housing-stock under an idealized, yet realistic, exposure scenario from contaminant deposition on the roof and surrounding surfaces. The building shielding factors are intended for use in emergency planning and level three probabilistic risk assessments for a variety of postulated radiological events in which a realistic assessment is necessary to better understand the potential risks for accident mitigation and emergency response planning...
October 10, 2017: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/28993138/the-impact-of-imaging-modality-ct-vs-mri-and-patient-position-supine-vs-prone-on-tangential-whole-breast-radiation-therapy-planning
#17
Kylie Dundas, Elise M Pogson, Vikneswary Batumalai, Geoff P Delaney, Miriam M Boxer, Mei Ling Yap, Verity Ahern, Christine Chan, Steven David, Marion Dimigen, Jennifer A Harvey, Eng-Siew Koh, Karen Lim, George Papadatos, Elizabeth Lazarus, Joseph Descellar, Peter Metcalfe, Lois Holloway
PURPOSE: The purpose of this study was to evaluate the impact of magnetic resonance imaging (MRI) versus computed tomography (CT)-derived planning target volumes (PTVs), in both supine and prone positions, for whole breast (WB) radiation therapy. METHODS AND MATERIALS: Four WB radiation therapy plans were generated for 28 patients in which PTVs were generated based on CT or MRI data alone in both supine and prone positions. A 6-MV tangential intensity modulated radiation therapy technique was used, with plans designated as ideal, acceptable, or noncompliant...
July 14, 2017: Practical Radiation Oncology
https://www.readbyqxmd.com/read/28989000/use-of-18-f-fdg-pet-ct-imaging-to-determine-internal-mammary-lymph-node-location-for-radiation-therapy-treatment-planning-in-breast-cancer-patients
#18
Tima Davidson, Merav Ben-David, Shira Galper, Tess Haskin, Megan Howes, Roland Scaife, Nayroz Kanana, Uri Amit, Noam Weizman, Bar Chikman, Elinor Goshen, Simona Ben-Haim, Zvi Symon, Jeffrey Goldstein
PURPOSE: Adjuvant internal mammary lymph node (IMN) radiation is often delivered with 2-dimensional techniques that use anatomic landmarks and predetermined depths for field placement and dose specification. In contrast, 3-dimensional planning uses the internal mammary vessels (IMVs) to localize the IMNs for planning. Our purpose was to determine if localization of the involved IMN (i-IMN) by (18)F-labeled fluorodeoxyglucose positron emission tomography-computed tomography ((18)F-FDG PET-CT) offers opportunities to improve treatment...
November 5, 2016: Practical Radiation Oncology
https://www.readbyqxmd.com/read/28988680/macroscopic-anisotropic-bone-material-properties-in-children-with-severe-osteogenesis-imperfecta
#19
Carolyne Albert, John Jameson, Sergey Tarima, Peter Smith, Gerald Harris
Children with severe osteogenesis imperfecta (OI) typically experience numerous fractures and progressive skeletal deformities over their lifetime. Recent studies proposed finite element models to assess fracture risk and guide clinicians in determining appropriate intervention in children with OI, but lack of appropriate material property inputs remains a challenge. This study aimed to characterize macroscopic anisotropic cortical bone material properties and investigate relationships with bone density measures in children with severe OI...
September 14, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28975062/patient-specific-fetal-dose-determination-for-multi-target-gamma-knife-radiosurgery-computational-model-and-case-report
#20
Anna K Paulsson, Steve Braunstein, Justin Phillips, Philip V Theodosopoulos, Michael McDermott, Patricia K Sneed, Lijun Ma
A 42-year-old woman at 29 weeks gestation via in vitro fertilization who presented with eight metastatic brain lesions received Gamma Knife stereotactic radiosurgery (GKSRS) at our institution. In this study, we report our clinical experience and a general procedure of determining the fetal dose from patient-specific treatment plans and we describe quality assurance measurements to guide the safe practice of multi-target GKSRS of pregnant patients. To estimate fetal dose pre-treatment, peripheral dose-to-focal dose ratios (PFRs) were measured in a phantom at the distance approximating the fundus of uterus...
July 31, 2017: Curēus
keyword
keyword
17539
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"